EU Taxonomy Regulation — The Definitive Reference

Executive Summary

The EU Taxonomy is the world's first legally binding green classification system. Adopted as Regulation (EU) 2020/852 of the European Parliament and of the Council of 18 June 2020 on the establishment of a framework to facilitate sustainable investment, it establishes a uniform definition of what qualifies as an environmentally sustainable economic activity across the European Union. It is operationalised through a series of Commission Delegated Acts that specify, on an activity-by-activity basis, the Technical Screening Criteria, the Do No Significant Harm criteria, and the disclosure obligations.

The Taxonomy is not, by itself, a mandatory investment standard. It is a transparency tool that plugs into a constellation of downstream regulations: the Corporate Sustainability Reporting Directive (CSRD) for corporate KPI disclosure; the Sustainable Finance Disclosure Regulation (SFDR) for product-level financial-product alignment; the EU Green Bond Standard (Regulation (EU) 2023/2631) for bond proceeds eligibility; the MiFID II framework for retail-investor sustainability preferences; the EU Climate Benchmarks regulation for benchmark methodology. Each of these regulations imports the Taxonomy as its definition of “sustainable” or “environmentally sustainable.” That gives the Taxonomy outsized regulatory leverage: a methodology change in a Delegated Act ripples through every downstream regime in the same disclosure cycle.

What distinguishes the May 2026 reading of the Taxonomy from any prior reading is the live operational impact of two simultaneous reforms. On 28 January 2026, the Commission Delegated Act simplifying the application of the EU Taxonomy Regulation entered into force, having been published in the Official Journal of the EU on 8 January 2026. The Delegated Act introduces a materiality threshold for assessing economic activities for Taxonomy eligibility and alignment: for non-financial undertakings, economic activities do not have to be assessed for Taxonomy alignment where they cumulatively represent less than 10 percent of the entity's total turnover, capital expenditure or operational expenditure. The Taxonomy reporting templates have been substantially streamlined, reducing the number of required data points by approximately 64 percent for non-financial undertakings and 89 percent for financial undertakings.

Running concurrently with the simplifying Delegated Act, the ‘Omnibus’ Directive reshapes the scope of who reports. The ‘Omnibus’ directive was published in the Official Journal of the European Union on 26 February 2026, following its official adoption by the Council of the European Union on 24 February 2026. The ‘Omnibus’ directive narrows the scope of entities required to report in accordance with ESRS and the EU Taxonomy to EU entities with over 1,000 employees and a net turnover exceeding €450 million. The EU Omnibus Simplification Package entered into force on 19 March 2026, removing approximately 80 percent of companies from mandatory CSRD reporting. The combined effect is a Taxonomy regime that, in 2026, applies mandatorily to a smaller, larger, and more material set of undertakings but with a deeper voluntary tail of opt-in reporters seeking access to sustainable finance markets.

The 2025–2026 Omnibus Reset — What Changed and What Still Operates

Any 2026 reading of the EU Taxonomy must lead with the Omnibus simplification package. The reform was proposed by the European Commission on 26 February 2025, advanced through trilogue and Parliament approval in late 2025, was adopted by the Council on 24 February 2026, and applies from 18 March 2026 as Directive (EU) 2026/470. Together with the simplifying Delegated Act that the Commission adopted on 4 July 2025 and that entered into force on 28 January 2026 with retroactive application from 1 January 2026, the two instruments materially reshape who reports, what they report, and how the assessment is performed.

The four practical changes that every 2026 Taxonomy reporter must internalise:

What does not change under the Omnibus reset is equally important. The Delegated Act amends the Taxonomy's Disclosures, Climate and Environmental Delegated Acts. The Taxonomy Regulation (EU) 2020/852 itself remains unchanged. The six environmental objectives remain. The four-gate test — substantial contribution, DNSH, minimum safeguards, Technical Screening Criteria — remains. The KPI architecture (turnover, CapEx, OpEx for non-financial; Green Asset Ratio and asset-manager alignment ratios for financial) remains. The Climate Delegated Act (EU) 2021/2139 remains. The Complementary Climate Delegated Act (EU) 2022/1214 covering gas and nuclear remains. The Disclosures Delegated Act (EU) 2021/2178 remains. The Environmental Delegated Act covering the four non-climate objectives, applicable since January 2024, remains. The downstream regimes — SFDR, EU Green Bond Standard, MiFID II sustainability preferences — continue to operate on the Taxonomy definition.

The third Platform on Sustainable Finance mandate, which began in February 2026 and runs through end-2027, is engaged in a comprehensive review of the Technical Screening Criteria themselves. For the current third mandate, the Commission has identified a number of priorities that will guide the platform's work: the revision of the technical screening criteria for existing activities, with revised Delegated Acts planned for adoption in 2026, with the aim to make them easier to use; the development of new Taxonomy technical screening criteria across all six environmental objectives; making Taxonomy and the wider EU sustainable finance framework (including on transition finance and SMEs), easier to use; monitoring and reporting on capital flows into sustainable investments at Union and Member State level. A revised Delegated Act updating TSC across the six objectives is expected to be adopted in the course of 2026, with the Commission having opened a call for feedback on 17 March 2026 on the revision of criteria for sustainable economic activities.

Chain of Custody — From Regulation to Capital Allocation

Every euro of EU sustainable capital that moves under a Taxonomy label rides a specific chain that connects the Taxonomy Regulation to the eventual capital allocation. Compliance teams, sustainability officers, investor relations functions, and procurement leads who do not know the chain end-to-end consistently underestimate where regulatory leverage is concentrated. The mapping below is the structural reference that every CSRD-scope undertaking, every SFDR product manufacturer, and every EU Green Bond issuer should be able to draw.

The chain reads downward for regulatory leverage: a Commission decision at step 2 (a Technical Screening Criterion revision) propagates through steps 3 to 10 over the next disclosure cycle. It reads upward for capital allocation accountability: an investor decision at step 10 (allocating to an EU Green Bond, or selecting an Article 9 product, or honouring a retail client's sustainability preference) ultimately traces back to an issuer or undertaking having passed the four-gate test at step 1. The 2024–2025 greenwashing enforcement actions by ESMA, AMF, BaFin, and national competent authorities have demonstrated that the chain is examined end-to-end when challenged: it is not sufficient for an Article 9 product to claim Taxonomy alignment if the underlying corporate KPIs do not support it.

What the EU Taxonomy Is — and What It Is Not

The EU Taxonomy is a classification system. It defines, for each in-scope economic activity, the conditions under which the activity qualifies as “environmentally sustainable” for the purposes of EU sustainable finance law. The classification is binary at the activity level — an activity is either Taxonomy-aligned or it is not — but the disclosure architecture is granular: an undertaking discloses what share of its turnover, CapEx, and OpEx flows through Taxonomy-eligible activities, what share flows through Taxonomy-aligned activities, and (under the post-Omnibus regime) what share flows through partially aligned activities.

What the Taxonomy is, in summary: a uniform EU-wide definition of environmentally sustainable economic activities; a tool to prevent greenwashing by setting common minimum criteria; a transparency mechanism to enable investors, lenders, and counterparties to identify activities aligned with the European Green Deal; the upstream definitional layer for the CSRD, SFDR, EU Green Bond Standard, MiFID II sustainability preferences, EU Climate Benchmarks Regulation, and other downstream regimes.

What the Taxonomy is not is equally important and frequently misunderstood:

• It is not a mandatory investment standard. The Taxonomy does not require any institution to invest in or allocate capital toward Taxonomy-aligned activities. It does not prohibit any activity. It is purely classificatory.
• It is not an exclusion list. Activities not covered by the Taxonomy are not, by that fact, “unsustainable.” They are simply unclassified. The Taxonomy covers approximately 80 sectors and activities currently; many activities (most service sectors, parts of agriculture, much of retail) are simply outside the scope at the present time.
• It is not a target-setting framework. SBTi, the EU Climate Law, and individual national climate strategies set targets; the Taxonomy classifies activities. An undertaking can be Paris-aligned in its target architecture and have low Taxonomy KPIs if its activities happen not to fall within the Taxonomy's currently covered sectors.
• It is not a comprehensive ESG framework. The Taxonomy covers six environmental objectives. Social and governance dimensions are not covered (with the limited exception of Minimum Safeguards on human rights and labour standards). The Social Taxonomy remains a Platform recommendation without legislative status, as discussed in section 29.
• It is not jurisdictionally neutral. The Technical Screening Criteria are designed for the EU regulatory context (EU electricity grid factors, EU building energy standards, EU pollution regulations as DNSH references). Non-EU activities can be assessed against the TSC, but the assessment requires careful translation of non-EU regulatory equivalents.
• It is not static. The Delegated Acts are subject to periodic revision. The Platform on Sustainable Finance is engaged in a comprehensive TSC revision through 2026–2027 under its third mandate.

Why the Taxonomy Exists

The Taxonomy was born from a specific institutional gap. By 2017–2018, the EU had committed to its Green Deal ambition — climate neutrality by 2050, with intermediate 2030 and 2040 milestones — and had calculated that meeting the ambition required mobilising approximately €1 trillion of additional sustainable investment per year through to 2030. The financial sector was willing to allocate; the regulatory question was how to ensure the capital actually went to activities that contributed to environmental objectives, rather than being absorbed by greenwashing labels that promised environmental benefit without delivering it.

The pre-Taxonomy fragmentation of green definitions was the operational problem. Multiple green bond standards (ICMA Green Bond Principles, Climate Bonds Initiative criteria, individual market practices) coexisted without a common definitional anchor. National sustainable-fund labels (the French SRI label, the Belgian Towards Sustainability label, the Luxembourg LuxFLAG, the Nordic Swan) operated with overlapping but not identical criteria. Article 9 of the SFDR predecessor (the original Article 8 of the Non-Financial Reporting Directive) required undertakings to disclose “non-financial information” without specifying what counted as environmental performance.

The European Commission's March 2018 Action Plan on Financing Sustainable Growth identified ten action items, of which Action 1 was the establishment of an EU taxonomy of sustainable activities. The Technical Expert Group on Sustainable Finance (TEG) was established to develop the methodology; its 2019 and 2020 reports provided the technical foundation for the Taxonomy Regulation. The Regulation was adopted on 18 June 2020 and entered into force on 12 July 2020, with Article 8 disclosure obligations applying progressively from 1 January 2022.

What the Taxonomy fixes, structurally, is the absence of a single, harmonised, legally binding definition of environmentally sustainable economic activities that downstream regulations can import as a definitional anchor. CSRD imports it for corporate disclosure. SFDR imports it for product-level disclosure. The EU Green Bond Standard imports it for use-of-proceeds eligibility. MiFID II imports it for retail-client sustainability preferences. The EU Climate Benchmarks Regulation imports it for benchmark methodology. Every one of these regimes refers to the same Taxonomy definition, with the same Technical Screening Criteria and the same DNSH and Minimum Safeguards tests. That definitional harmonisation is the Taxonomy's structural contribution.

The 2025–2026 simplification reforms have not changed this structural function; they have streamlined the assessment burden for marginal activities (the 10 percent materiality threshold) and reduced the reporting templates' data-point density (the 64 percent and 89 percent reductions). The four-gate test, the six objectives, and the definitional harmonisation across downstream regimes remain unchanged.

Governance and Legislative History

The EU Taxonomy is governed by a multi-instrument architecture. The Taxonomy Regulation itself is a Level 1 act adopted under the ordinary legislative procedure (Parliament and Council). The Delegated Acts that operationalise it are Level 2 acts adopted by the Commission under the delegation of power in Articles 10 to 15 of the Taxonomy Regulation, subject to Parliament and Council scrutiny under Article 290 TFEU. The Platform on Sustainable Finance is the standing expert group that advises the Commission on the substantive content of the Delegated Acts.

The publication history:

The Sustainable-Finance Stack — Where the Taxonomy Sits

The single highest-value structural reference for any audit committee, sustainability officer, or capital-markets head is the full sustainable-finance stack within which the Taxonomy operates. The stack is layered with precision; each layer plays a distinct role; the Taxonomy is the upstream definitional layer that the other layers import. No competitor reference page maps the full stack end to end.

The stack reads upward for regulatory dependency: every layer imports the Taxonomy's definition of “environmentally sustainable.” The stack reads downward for capital-allocation impact: a change in TSC at the second layer propagates through corporate KPI disclosure, financial product alignment, green bond eligibility, and retail-client preference matching within the same reporting cycle. For a CSRD-scope undertaking with EU Green Bond issuance and Article 9 financial product distribution, the stack is operationally indivisible: every layer must be compliant simultaneously for the overall sustainable-finance positioning to hold.

The Six Environmental Objectives

Article 9 of the Taxonomy Regulation sets out six environmental objectives. An economic activity must substantially contribute to at least one of them to be Taxonomy-aligned. The objectives are equal in legal status; in practice, climate change mitigation accounts for the largest share of reported alignment because the Climate Delegated Act has been operative longest and covers the most activities, but the Environmental Delegated Act — applicable since January 2024 — brings the other four non-climate objectives into reporting volume from FY 2024 onwards.

The Climate Delegated Act (EU) 2021/2139 specifies TSC for objectives 1 and 2 (mitigation and adaptation). The Environmental Delegated Act (EU) 2023/2486, applicable since January 2024, specifies TSC for objectives 3, 4, 5, and 6. The Platform on Sustainable Finance under its third mandate is engaged in the comprehensive review of TSC across all six objectives with revised Delegated Acts planned for adoption in 2026, focused on improving usability and expanding sector coverage.

The six objectives are not a hierarchy. An activity contributing to one is on equal Taxonomy footing with an activity contributing to another. What matters operationally is which objective the activity substantially contributes to (the primary objective) and whether it does no significant harm to the other five (the DNSH test, run for each non-primary objective). A wind farm contributing to mitigation must demonstrate DNSH for adaptation, water, circular economy, pollution, and biodiversity. A water-treatment facility contributing to water must demonstrate DNSH for mitigation, adaptation, circular economy, pollution, and biodiversity. The cross-objective testing is what gives the Taxonomy its claimed scientific rigour and is what makes implementation operationally heavy.

The Four-Gate Test — Mechanics in Operational Depth

An economic activity is Taxonomy-aligned only after passing all four gates in sequence. Most reference pages list the gates as a four-item bullet; this section maps the mechanics of each gate in operational depth — what each gate requires, how it is evidenced, where the failure modes are, and what the simplifying Delegated Act has done to streamline each.

Gate 1 — Substantial Contribution

The activity must substantially contribute to at least one of the six environmental objectives. For each objective, the Climate or Environmental Delegated Act specifies activity-specific TSC that define what “substantial contribution” means in operational terms. The TSC are typically quantitative thresholds:

• Electricity generation from solar PV (Climate Delegated Act, activity 4.1): the activity substantially contributes to mitigation; there is no quantitative threshold beyond the technology category itself.
• Electricity generation from gas (Complementary Climate Delegated Act, activity 4.29): the activity substantially contributes to mitigation only if direct emissions are below 100 g CO₂e/kWh on a life-cycle basis, or below 270 g CO₂e/kWh with strict additional conditions; the activity is classified as transitional.
• Construction of new buildings (Climate Delegated Act, activity 7.1): primary energy demand of the new building must be at least 10 percent lower than the threshold set for the nearly zero-energy building (NZEB) requirements in national measures implementing the Energy Performance of Buildings Directive.
• Manufacture of cement (Climate Delegated Act, activity 3.7): specific emissions thresholds in kg CO₂e per tonne of clinker or per tonne of cement, with intermediate targets that ratchet over time.

The failure modes at Gate 1 are typically definitional: the activity description in the corporate's management accounts does not match the NACE-coded activity in the Delegated Act; the activity boundary chosen by the corporate is broader or narrower than the TSC boundary; the quantitative threshold is missed by a margin that the corporate had not factored into its pre-assessment.

Gate 2 — Do No Significant Harm (DNSH)

The activity must do no significant harm to any of the other five environmental objectives (the five objectives the activity is not substantially contributing to). DNSH is not a single test; it is five separate assessments, one for each non-primary objective, with the criteria for each set out in Appendices to the Climate Delegated Act and Environmental Delegated Act.

The DNSH structure varies by objective:

• DNSH on climate change mitigation: typically tested through GHG emissions thresholds or operational efficiency metrics.
• DNSH on climate change adaptation: requires a climate risk and vulnerability assessment for the activity, with adaptation solutions implemented as appropriate; for many sectors, this is the most operationally demanding DNSH assessment.
• DNSH on water: tested through compliance with EU water-related directives (Water Framework Directive, Drinking Water Directive, Urban Wastewater Treatment Directive, etc.) and water-stress assessments.
• DNSH on circular economy: tested through waste management practices, design for durability and reparability, recycled content thresholds.
• DNSH on pollution prevention: historically the most chemical-intensive DNSH assessment, with substance-by-substance evidencing requirements; the simplifying Delegated Act of 4 July 2025 has reduced this evidencing burden materially.
• DNSH on biodiversity: tested through environmental impact assessments, protected area considerations, and biodiversity-sensitive land-use practices.

The failure modes at Gate 2 are the most common Taxonomy disclosure issue. The Platform on Sustainable Finance has repeatedly identified that DNSH verification is the most difficult step in the EU Taxonomy assessment process. Common DNSH failure patterns: an activity that clearly contributes to mitigation fails DNSH on adaptation because no climate risk and vulnerability assessment has been performed; an activity passes DNSH on most objectives but fails on pollution prevention because a single substance in the chemical use is not below the relevant threshold; DNSH on biodiversity fails because the activity site is within a protected area that the corporate had not mapped.

Gate 3 — Minimum Safeguards

The activity must comply with minimum safeguards on human rights and labour standards. The Taxonomy Regulation Article 18 specifies that the safeguards are procedures established by the undertaking to ensure alignment with: the OECD Guidelines for Multinational Enterprises; the UN Guiding Principles on Business and Human Rights, including the principles and rights set out in the eight fundamental conventions identified in the Declaration of the International Labour Organization on Fundamental Principles and Rights at Work; and the International Bill of Human Rights.

The Platform on Sustainable Finance published a report on Minimum Safeguards in October 2022 that operationalised the assessment into four substantive topics: human rights (including labour rights and consumer rights), bribery and corruption, taxation, and fair competition. For each topic, the assessment looks for processes within the undertaking that align with the relevant international standard, and screens for incidents (court judgements, regulatory sanctions, OECD National Contact Point cases) that would indicate non-compliance.

The failure mode at Gate 3 is typically box-tick treatment. Many undertakings assess Minimum Safeguards as a yes-or-no question, declare compliance, and provide no underlying evidence of the four-topic substantive assessment. The 2024–2025 ESMA supervisory work on CSRD assurance preparation has flagged Minimum Safeguards as an area where assurance providers will be asked to test the substantive evidence underneath the declared compliance.

Gate 4 — Technical Screening Criteria Compliance

This is the operational manifestation of Gates 1 and 2. The Technical Screening Criteria for a given activity, set out in the Climate, Complementary Climate, or Environmental Delegated Act, contain both the substantial contribution criteria (Gate 1 in operational form) and the DNSH criteria for the other five objectives (Gate 2 in operational form). Gate 4 is the assertion that the activity meets all of these criteria simultaneously, with documentary evidence retained and available for assurance.

The failure mode at Gate 4 is documentation. An activity can substantively meet every TSC and still fail at audit if the underlying documentation does not allow the assurance provider to trace the assertion back to source evidence — technical drawings, third-party certifications, emission factor sources, environmental impact assessments, supplier confirmations.

Eligibility versus Alignment — The Most-Misunderstood Concept

The single most-misunderstood concept in the EU Taxonomy is the distinction between Taxonomy-eligible and Taxonomy-aligned activities. The eligibility-versus-alignment two-step is mandatory under the Disclosures Delegated Act, and treating eligibility as alignment is the most common Taxonomy disclosure error.

Taxonomy-eligible means the activity falls within a category that is covered by the Climate, Complementary Climate, or Environmental Delegated Act. An activity is eligible if it is on the list, irrespective of whether the activity passes the four-gate test. Eligibility is binary at the activity-category level: the activity either is or is not described in a Delegated Act category.

Taxonomy-aligned means the activity is eligible AND passes all four gates: substantial contribution under the relevant TSC, DNSH on the other five objectives, Minimum Safeguards, and the full Technical Screening Criteria. Only aligned activities count toward the “sustainable” share of the corporate's KPIs in the substantive sense.

The two-step disclosure requirement under the Disclosures Delegated Act is that an undertaking discloses, separately:

1. Its share of turnover, CapEx, and OpEx associated with Taxonomy-eligible economic activities.
2. Its share of turnover, CapEx, and OpEx associated with Taxonomy-aligned economic activities (a subset of the eligible).

For most undertakings, the gap between eligibility and alignment is substantial. A typical industrial manufacturer might have 60–70 percent of its activities Taxonomy-eligible (manufacturing, construction, building operation, freight transport, etc.) but only 5–15 percent Taxonomy-aligned in the first reporting cycles, because passing all four gates simultaneously across the activity portfolio is operationally demanding. Over time, as undertakings invest in alignment-improving CapEx, the aligned share converges toward the eligible share; but the gap is a real and material disclosure item, not a quirk to be glossed over.

The Disclosures Delegated Act and the simplifying Delegated Act of 4 July 2025 jointly preserve the two-step. The simplifying Delegated Act's 10 percent materiality threshold for non-financial undertakings means that activities below 10 percent of turnover, CapEx, or OpEx do not need to be assessed for alignment, but they still must be assessed for eligibility. The eligibility-versus-alignment distinction is therefore preserved even for sub-threshold activities — the corporate reports eligibility universally and reports alignment for the activities above the materiality threshold.

Climate Change Mitigation — The Most-Used Objective

Climate change mitigation is the dominant objective in current Taxonomy reporting. It accounts for the majority of disclosed alignment volume and is the objective with the longest TSC track record (the Climate Delegated Act has been applicable since 1 January 2022). The Delegated Act covers economic activities across nine sectoral categories:

• Forestry — afforestation, rehabilitation and restoration of forests, forest management, conservation forestry.
• Environmental protection and restoration activities — restoration of wetlands.
• Manufacturing — including renewable energy technologies, low-carbon transport equipment, batteries, hydrogen, cement, aluminium, iron and steel, chemicals, plastics, and other carbon-intensive sectors with sector-specific TSC.
• Energy — electricity generation (solar, wind, hydro, ocean, geothermal, bioenergy, gas under conditions, nuclear under conditions), heat generation, electricity and heat storage, transmission and distribution.
• Water supply, sewerage, waste management and remediation — water collection and supply, anaerobic digestion of sewage sludge and bio-waste, composting, materials recovery from non-hazardous waste.
• Transport — passenger and freight transport by road, rail, water, and air, with mode-specific TSC.
• Construction and real estate activities — new construction of buildings, renovation of existing buildings, acquisition and ownership of buildings.
• Information and communication — data processing, hosting and related activities; computer programming, consultancy and related activities.
• Professional, scientific and technical activities — engineering activities and related technical consultancy dedicated to climate adaptation/mitigation, research and experimental development on climate change mitigation/adaptation.

For each activity, the Climate Delegated Act specifies the substantial contribution criteria, the DNSH criteria for each of the other five objectives, and any phasing or transitional thresholds. The TSC are typically quantitative: emission factor thresholds (g CO₂e per unit output), energy performance thresholds (kWh/m² primary energy demand for buildings, Energy Performance Certificate ratings), or technology specifications (battery chemistry, vehicle drivetrain types).

The Platform on Sustainable Finance under its third mandate has identified the revision of mitigation TSC as a 2026 priority, with the aim of improving usability. Common practitioner concerns that the revision is expected to address include: imprecise threshold definitions (e.g., the “highly durable” wind power criterion that lacks a quantified definition); excessive granularity in some activity definitions that fragments the sector and complicates KPI consolidation; absence of TSC for activities that have emerged or grown materially since the original 2021 Delegated Act (certain emerging hydrogen and clean energy technologies).

The cross-reference layer between mitigation TSC and GHG accounting is the calculation methodology. Most mitigation TSC reference the GHG Protocol for Scope 1, 2, and 3 calculations, with IPCC AR6 GWP values as the applicable warming-potential basis. The dedicated GHG Protocol Corporate Standard and IPCC AR6 reference pages cover the methodology layers in full.

Climate Change Adaptation — The Least-Understood Objective

Climate change adaptation is the least understood and most operationally challenging objective. The conceptual difficulty: while mitigation contribution is typically a reduction in emissions (measurable, attributable, directly comparable to a baseline), adaptation contribution is a reduction in vulnerability to physical climate risk (less directly measurable, often qualitative, and dependent on the climate scenario assumed). The Taxonomy treats adaptation as a substantive objective on equal footing with mitigation, but operationalising it has proven harder.

The Climate Delegated Act specifies two pathways for an activity to substantially contribute to adaptation:

1. Adapted activities — the activity itself includes adaptation solutions that substantially reduce the most significant physical climate risks affecting the activity. The reduction is demonstrated through a climate risk and vulnerability assessment that identifies physical risks, evaluates their materiality, and shows how the implemented solutions address them.
2. Enabling activities for adaptation — the activity provides solutions to other activities or sectors that enable adaptation. Engineering consultancy on flood defence design, climate risk assessment services, weather-resilient infrastructure manufacturing are examples.

The DNSH requirement for adaptation, applicable to activities contributing primarily to a different objective, is typically: the activity has performed a climate risk and vulnerability assessment, identified material physical risks under reasonable climate scenarios, and implemented or planned adaptation solutions as appropriate. This DNSH requirement applies to almost every activity in the Climate Delegated Act and the Environmental Delegated Act, making it operationally one of the most ubiquitous DNSH tests.

The Climate Delegated Act and the Disclosures Delegated Act jointly require the climate risk and vulnerability assessment to be conducted using climate scenarios from authoritative sources, typically the IPCC scenarios (AR6 SSPs). The assessment must consider physical risks (acute: floods, storms, heat waves; chronic: sea-level rise, water stress, changing precipitation patterns), evaluate their materiality over relevant time horizons, and document the rationale for the adaptation solutions implemented.

The operational integration with TCFD/IFRS S2 physical risk assessment is direct. An undertaking conducting physical risk assessment under IFRS S2 paragraph 22 has substantially completed the substantive work required for Taxonomy adaptation alignment and adaptation DNSH. The dedicated TCFD Recommendations and IFRS S2 Climate-Related Disclosures reference pages cover the physical risk assessment frameworks. The procurement-side discipline is to design the climate risk assessment process once, with sufficient granularity and rigor, and use the same evidence for IFRS S2 disclosure, Taxonomy adaptation substantial contribution, and Taxonomy adaptation DNSH simultaneously.

Gas and Nuclear — The Complementary Climate Delegated Act

The Complementary Climate Delegated Act (Commission Delegated Regulation (EU) 2022/1214) added certain gas and nuclear energy activities to the Taxonomy under strict conditions. The Act was politically contentious from the outset and remains the most contested element of the Taxonomy architecture; it has been challenged before the EU courts; it has produced specific additional disclosure obligations under SFDR for exposure to gas and nuclear activities.

The gas activities included, subject to strict TSC and additional disclosure requirements:

• Electricity generation from fossil gaseous fuels (activity 4.29) — classified as transitional; requires direct emissions below 100 g CO₂e/kWh on a life-cycle basis, or below 270 g CO₂e/kWh with additional conditions including replacement of higher-emitting fossil installations, demonstrated transition to renewable or low-carbon gases by 2035, and member-state authorisation by end-2030.
• High-efficiency cogeneration of heat and power from fossil gaseous fuels (activity 4.30).
• Production of heat or cool from fossil gaseous fuels in an efficient district heating and cooling system (activity 4.31).

The nuclear activities included:

• Research, development and deployment of advanced technologies (“Generation IV”) that minimise waste and improve safety standards (activity 4.26).
• Construction and safe operation of new nuclear power plants for the generation of electricity or heat, including for hydrogen production, using best-available technologies (“Generation III+”), authorised by competent authorities by 2045 (activity 4.27).
• Electricity generation, hydrogen production, and process heat or district heat from nuclear energy in existing installations whose lifetime extension is authorised by competent authorities by 2040 (activity 4.28).

The Act introduces specific disclosure templates that financial market participants and undertakings must use to disclose exposure to these activities. Article 8 disclosures under the Disclosures Delegated Act for in-scope undertakings, and SFDR product-level disclosures, both include dedicated sections on the share of activities covered by the Complementary Climate Delegated Act.

The legal challenge: In the judgement Austria v Commission of 10 September 2025, the General Court examined an action for annulment of Commission delegated regulation (EU) 2022/1214 (Complementary Climate Delegated Act). This delegated act was adopted to include specific nuclear and gas energy activities among the sustainable economic activities identified by regulation (EU) 2020/852 (EU Taxonomy) and, upon its presentation by the Commission, already met considerable public criticism. The judgement constitutes the first ruling on the legality of the Complementary Climate Delegated Act. The General Court rejected Austria's action, upholding the Complementary Climate Delegated Act, with ten Member States intervening in the proceedings (Luxembourg in support of the applicant; nine other Member States in support of the Commission). The judgement is subject to potential appeal to the Court of Justice within two months of its publication; as of May 2026 the appeal status should be confirmed through the EUR-Lex Curia register.

Transition, Enabling, and Substantial-Contribution Activities

The Taxonomy classifies in-scope economic activities into three categories based on the nature of their environmental contribution. The category determines the assessment pathway and the TSC structure that applies.

The transition activity category is the most-debated. Critics argue that transition activities should not be classified as “sustainable” if they involve continued GHG emissions, even at sector-best levels. Defenders argue that the EU economy cannot transition to climate neutrality if intermediate technologies (cement, steel, transitional gas) are excluded from the sustainable-finance perimeter; capital must be mobilised to decarbonise these activities, and excluding them from the Taxonomy would simply mean their financing falls outside the disclosure framework.

The Complementary Climate Delegated Act applies the transition activity classification to certain gas and nuclear activities, with explicit sunset dates (gas authorisations by end-2030 with conversion to renewable or low-carbon gases by 2035; new nuclear plant authorisations by 2045; existing nuclear lifetime extensions authorised by 2040). This is the strongest practical application of the transition activity concept and the most-contested.

The enabling activity category is operationally important because it dramatically expands the Taxonomy alignment surface beyond the activities that directly emit or remove emissions. A wind turbine component manufacturer is an enabling activity (it enables wind electricity generation, which is a substantial contribution activity). A solar PV inverter manufacturer is an enabling activity. An engineering consultancy designing flood defences is an enabling activity for adaptation. The enabling category is what allows manufacturers, engineering firms, technology providers, and many service businesses to demonstrate Taxonomy alignment for activities that would not, on their own face, look directly environmental.

The Platform on Sustainable Finance has separately recommended consideration of a fourth category — activities meeting substantial contribution criteria but not all DNSH verifications — as a “partial alignment” category. The Omnibus reform has partially implemented this through the partial-alignment voluntary reporting option, particularly relevant for undertakings below the mandatory threshold that wish to demonstrate transitional environmental performance.

The Corporate KPIs — Turnover, CapEx, OpEx

For non-financial undertakings, the Taxonomy disclosure regime under the Disclosures Delegated Act requires three Key Performance Indicators: the Turnover KPI, the CapEx KPI, and the OpEx KPI. Each KPI is reported as both an eligibility share (the share of the metric associated with Taxonomy-eligible activities) and an alignment share (the share associated with Taxonomy-aligned activities). The simplifying Delegated Act of 4 July 2025 introduces a 10 percent materiality threshold under which sub-threshold activities do not need to be assessed for alignment.

Turnover KPI

Numerator: turnover derived from products or services associated with Taxonomy-aligned economic activities.

Denominator: net turnover as defined in Article 2(5) of Directive 2013/34/EU (the Accounting Directive) — the same net turnover that appears in the audited financial statements.

The Turnover KPI reflects the current operational economic activity profile of the undertaking. It changes only as the business mix evolves; it does not reflect forward-looking investment in alignment.

CapEx KPI

Numerator: capital expenditure related to assets or processes that are associated with Taxonomy-aligned economic activities (numerator part a), capital expenditure that is part of a plan to expand Taxonomy-aligned economic activities or transition Taxonomy-eligible activities to alignment (numerator part b), or capital expenditure related to the purchase of output from Taxonomy-aligned economic activities and individual measures enabling activities to become low-carbon (numerator part c).

Denominator: capital expenditure as defined in the applicable financial reporting framework (IFRS or applicable national GAAP), covering additions to tangible and intangible fixed assets during the financial year before depreciation, amortisation, and any re-measurements.

The CapEx KPI is the most forward-looking of the three KPIs. It reflects the undertaking's investment in alignment and is the metric that banks, infrastructure investors, and Article 9 fund managers typically focus on when evaluating transition trajectory.

OpEx KPI

Numerator: operating expenditure related to assets or processes associated with Taxonomy-aligned economic activities, including direct non-capitalised costs related to research and development, building renovation measures, short-term lease, maintenance and repair, and any other direct expenditures relating to day-to-day servicing of assets that are necessary to ensure the continued and effective functioning of such assets.

Denominator: direct non-capitalised costs that relate to the same categories as in the numerator definition.

The OpEx KPI is the most narrowly scoped — it is not total operating expenditure but a defined subset. Non-financial companies can be exempt from calculating the OPEX indicator where the OpEx amount as defined is immaterial relative to the entity's overall business model; the simplifying Delegated Act has reinforced this materiality-based exemption.

For each KPI, the disclosure templates require a breakdown by environmental objective (mitigation, adaptation, water, circular, pollution, biodiversity) and by activity category (substantial contribution, transitional, enabling). Activities contributing to multiple objectives are disclosed under each contributing objective but counted only once in the total to prevent double-counting.

The Financial-Undertaking KPIs — GAR and the Asset-Manager Ratio

Financial undertakings — banks, asset managers, insurance and reinsurance undertakings, investment firms — have a parallel but distinct KPI architecture under the Disclosures Delegated Act. The financial KPIs measure the Taxonomy alignment of the financial undertaking's exposures and investments, not the financial undertaking's own activities.

Green Asset Ratio (GAR) — for credit institutions

The GAR is the principal Taxonomy KPI for banks. It measures the share of a credit institution's assets associated with Taxonomy-aligned economic activities as a percentage of total covered assets.

Numerator: gross carrying amount of assets associated with Taxonomy-aligned economic activities — primarily loans and advances to non-financial counterparties whose activities are Taxonomy-aligned, but also including specific other asset classes.

Denominator: gross carrying amount of total covered assets, excluding exposures to sovereigns, central banks, and supranational issuers, and excluding the trading book.

The GAR is reported separately for the stock of assets (total balance sheet) and for the flow (new financing during the reporting period). It is also broken down by environmental objective and by counterparty type.

Asset-manager alignment ratio

Asset managers disclose the weighted-average Taxonomy alignment of their portfolios. The alignment is calculated using the underlying portfolio company Taxonomy KPIs (their Turnover KPI for equity holdings, their CapEx KPI for project finance, etc.) weighted by the asset manager's portfolio holdings.

The granularity required is significant: the asset manager must obtain the underlying corporate Taxonomy KPIs for each portfolio holding, which depends on those corporates being in scope of CSRD and having disclosed their Taxonomy KPIs — a dependency that the Omnibus scope reduction directly affects.

Insurance underwriting KPI and investment KPI

Insurance and reinsurance undertakings disclose two distinct KPIs: an underwriting KPI measuring the alignment of premium income related to insurance contracts covering climate-related perils (adaptation alignment); and an investment KPI measuring the alignment of the undertaking's investment portfolio. The investment KPI follows asset-manager logic.

Investment-firm KPI

Investment firms disclose KPIs depending on the firm's business model — dealing on own account follows credit-institution logic, asset management follows asset-manager logic, etc.

The simplifying Delegated Act of 4 July 2025 reduced the financial-undertaking template data points by approximately 89 percent. The most material reduction was in the GAR template granularity: the pre-simplification GAR required separate disclosure across multiple counterparty types, multiple environmental objectives, and multiple time horizons, producing tables of hundreds of cells; the post-simplification GAR template focuses on the operationally meaningful breakdowns.

The Green Asset Ratio has been a particular focus of practitioner debate because the denominator includes assets that the bank cannot meaningfully assess for Taxonomy alignment (e.g., loans to SMEs that fall outside CSRD scope and therefore have no Taxonomy disclosure). The pre-simplification GAR for most European banks landed in the low single digits (2–6 percent), reflecting not necessarily low underlying alignment but rather a denominator construction issue. The post-simplification GAR retains the same conceptual construction; the practitioner debate continues into 2026.

Worked Example — Non-Financial Corporate Taxonomy KPIs

An illustrative worked example demonstrating Taxonomy KPI calculation for a non-financial undertaking under the post-Omnibus regime. The example is a hypothetical European industrial manufacturer; the numbers are illustrative and hardcoded for instructional purposes, not the operational values for any specific real-world undertaking.

Entity profile

“European Materials AG” — a hypothetical Germany-headquartered industrial materials manufacturer with operations in Germany, France, Poland, and Spain. FY 2026 financial profile: net turnover €3,200 million; capital expenditure (additions to tangible and intangible fixed assets) €480 million; eligible OpEx (R&D + building renovation + maintenance) €95 million. Activities span cement manufacture, aggregates, ready-mix concrete production, and engineering services for sustainable construction. In CSRD scope under the post-Omnibus regime (over 1,000 employees, turnover over €450 million).

Step 1: Activity mapping

The undertaking maps its operational activities to NACE codes and to Taxonomy Delegated Act activity descriptions. The mapping identifies:

• Cement manufacture (Climate Delegated Act activity 3.7) — eligible; potentially aligned if specific emissions are below the relevant threshold per tonne of clinker / tonne of cement.
• Aggregates extraction — not covered by current Delegated Acts; not eligible.
• Ready-mix concrete production — partially covered (manufacture of low-carbon concrete falls under enabling activities); the assessment is activity-specific.
• Engineering services for sustainable construction (Climate Delegated Act activity 9.3 — professional services related to energy performance of buildings) — eligible; alignment depends on the share of services dedicated to qualifying buildings.

Step 2: Materiality screen (simplifying Delegated Act)

Turnover by activity: cement €1,920m (60 percent); aggregates €480m (15 percent); ready-mix concrete €640m (20 percent); engineering services €160m (5 percent). Under the post-simplification 10 percent materiality threshold, engineering services (5 percent) falls below threshold for alignment assessment but remains in scope for eligibility assessment. Cement (60 percent), aggregates (15 percent), and ready-mix concrete (20 percent) are all above the materiality threshold and must be assessed for alignment.

Step 3: Four-gate assessment for material activities

Cement manufacture (Activity 3.7, €1,920m turnover):
  Gate 1 (Substantial Contribution): plant-level specific emissions are 715 kg CO₂e/t cement.
    TSC threshold: 722 kg CO₂e/t cement (illustrative); passes.
  Gate 2 (DNSH): adaptation, water, circular, pollution, biodiversity assessments all pass; documentation complete.
  Gate 3 (Minimum Safeguards): four-topic assessment complete; no material findings; passes.
  Gate 4 (TSC overall): full TSC compliance documented; passes.
  Result: ALIGNED.

Aggregates extraction (€480m turnover):
  Not covered by current Delegated Acts.
  Result: NOT ELIGIBLE.

Ready-mix concrete (€640m turnover):
  Of which low-carbon concrete (enabling activity): €192m.
  Gates 1–4 pass for the low-carbon concrete share.
  Conventional concrete share (€448m): not eligible.
  Result: €192m aligned; €448m not eligible.

Engineering services (€160m turnover, below materiality threshold):
  Eligibility assessment: eligible.
  Alignment assessment: optional under simplifying Delegated Act.
  Undertaking elects voluntary alignment assessment; passes all four gates.
  Result: ALIGNED (voluntary disclosure).

Step 4: KPI calculation

Turnover KPI:
  Eligible turnover = 1,920 + 640 + 160 = €2,720m (85 percent of €3,200m)
  Aligned turnover = 1,920 + 192 + 160 = €2,272m (71 percent of €3,200m)

CapEx KPI:
  CapEx allocated by activity (proportional to expansion-and-maintenance plans):
    Cement decarbonisation (kiln upgrades, alternative fuels): €240m — aligned (numerator b).
    Low-carbon concrete plant capacity expansion: €90m — aligned (numerator a).
    Aggregates extraction equipment: €60m — not eligible.
    Conventional concrete maintenance: €55m — not eligible.
    Engineering services office expansion: €15m — aligned (voluntary).
    General corporate (head office, IT): €20m — not eligible.
  Aligned CapEx = 240 + 90 + 15 = €345m (72 percent of €480m)
  Eligible CapEx = aligned + planned-not-yet-aligned (none in this example) = €345m (72 percent)

OpEx KPI:
  Eligible OpEx denominator (R&D + qualifying maintenance + building renovation) = €95m
  Aligned OpEx (R&D on cement decarbonisation + maintenance of aligned plant): €72m (76 percent of €95m)

Step 5: Disclosure

The undertaking discloses in its CSRD sustainability statement:

• Turnover KPI: 85 percent eligible; 71 percent aligned (of which 100 percent climate change mitigation; voluntary engineering-services share separately identified).
• CapEx KPI: 72 percent eligible; 72 percent aligned.
• OpEx KPI: 76 percent aligned (eligible same).
• Breakdown by environmental objective: predominantly climate change mitigation; adaptation share via the climate risk and vulnerability assessment for the manufacturing sites.
• Breakdown by activity category: substantial contribution (low-carbon concrete enabling activities, engineering services), transitional (cement manufacture under threshold), enabling (low-carbon concrete supply to construction sector).
• Narrative on the CapEx plan: the €240m cement decarbonisation CapEx is disclosed with the underlying plan, demonstrating transition to lower-emission cement over the planning horizon.

Worked Example — Bank Green Asset Ratio

A parallel illustrative example demonstrating Green Asset Ratio calculation for a European bank. Numbers are illustrative and hardcoded for instructional purposes, not the operational values for any specific real-world institution.

Bank profile

“Europe Universal Bank SE” — a hypothetical Eurozone universal bank, large CSRD-scope financial undertaking. FY 2026 balance sheet: total assets €420 billion; total covered assets (excluding sovereigns, central banks, supranationals, and trading book) €310 billion; non-financial corporate loan portfolio €165 billion; retail mortgage portfolio €95 billion; other covered assets €50 billion.

Step 1: Non-financial corporate loan portfolio assessment

Of the €165 billion non-financial corporate portfolio, €125 billion is to counterparties in CSRD scope (post-Omnibus). For these counterparties, the bank obtains the borrower's Taxonomy alignment KPIs (Turnover KPI for general corporate purposes loans; CapEx KPI for project finance and use-of-proceeds loans).

Of €125bn to CSRD-scope counterparties:
  Weighted-average Turnover-KPI alignment: 18 percent → aligned loans = 22.5bn
  Weighted-average CapEx-KPI alignment (for project finance, €25bn of the €125bn): 45 percent → aligned project finance = 11.25bn
  Of €40bn to non-CSRD-scope counterparties (post-Omnibus): no available Taxonomy KPI; contributes 0 to numerator under GAR rules.
  Aligned corporate loans = ~33.75bn (approximate, depending on use-of-proceeds vs general-purpose classification)

Step 2: Retail mortgage portfolio assessment

Retail mortgages secured on residential property may be Taxonomy-aligned under Climate Delegated Act activity 7.7 (Acquisition and ownership of buildings). Alignment depends on the property's Energy Performance Certificate (EPC) rating or its top-15-percent positioning in the national stock.

Of €95bn retail mortgages:
  Properties with EPC rating A or in top 15 percent of national stock by primary energy demand: €19bn → aligned.
  Properties without sufficient EPC data: €31bn → not assessable, contributes 0 to numerator.
  Properties below threshold: €45bn → not aligned.
  Aligned retail mortgages = 19bn

Step 3: Other covered assets

Of €50bn other covered assets, a small share (€3.5bn) is on Taxonomy-aligned exposure types (EU Green Bonds held in the banking book, specific infrastructure project finance with documented alignment).

Step 4: GAR calculation

Numerator (aligned covered assets):
  Corporate loans: 33.75bn
  Retail mortgages: 19bn
  Other: 3.5bn
  Total: 56.25bn

Denominator (total covered assets): 310bn

Green Asset Ratio (stock) = 56.25 / 310 = 18.1 percent

Step 5: Flow GAR

The flow GAR is calculated on the same basis but limited to new financing during the reporting period. For this illustrative example, the new-business GAR lands at approximately 28 percent — higher than the stock GAR because the bank's new lending is more concentrated on aligned exposures (EU Green Bond-financed projects, energy-efficient mortgages, transition-finance CapEx loans) than the legacy stock.

Interaction with CSRD ESRS E1

The Corporate Sustainability Reporting Directive is the regulatory vehicle through which Taxonomy KPIs reach disclosure. CSRD Article 19a and Article 29a require in-scope undertakings to include in their management report a sustainability statement prepared in accordance with European Sustainability Reporting Standards (ESRS). The sustainability statement contains the Taxonomy KPIs alongside the rest of the ESRS topical disclosures.

The specific integration:

• ESRS E1 (Climate change) requires disclosure of GHG emissions (Scopes 1, 2, 3), climate transition plan, physical and transition climate risks, climate-related targets, climate-related opportunities, and climate-related financial effects. Many of these disclosures feed directly into Taxonomy assessments: the Scope 1, 2, 3 emissions data inform mitigation TSC compliance; the physical risk assessment under ESRS E1-9 informs adaptation alignment and DNSH; the transition plan under ESRS E1-1 provides the narrative wrapper around the CapEx KPI.
• The Taxonomy KPIs appear as a separate cross-cutting disclosure within the sustainability statement, in the format prescribed by the Disclosures Delegated Act as amended by the simplifying Delegated Act.
• ESRS 1 and ESRS 2 (general principles and general disclosures) require double materiality assessment that influences which topics, and which Taxonomy environmental objectives, are reported in depth.

The post-Omnibus regime preserves this integration. The simplified ESRS delegated act expected from the Commission in 2026 is anticipated to reduce ESRS data points by approximately 70 percent (1,073 to approximately 320 per published practitioner analyses), with the Taxonomy KPIs retained as a core cross-cutting disclosure. The dedicated CSRD/ESRS E1 reference page covers the disclosure regime in full.

Interaction with SFDR

The Sustainable Finance Disclosure Regulation (Regulation (EU) 2019/2088) imposes sustainability-related disclosure obligations on financial market participants (asset managers, pension providers, insurance product manufacturers) and financial advisers operating in the EU. The Taxonomy and SFDR are operationally integrated: SFDR disclosures use the Taxonomy as the definitional anchor for “sustainable” investments.

The principal SFDR product-level disclosures relevant to the Taxonomy:

• Article 6 products — products that do not promote environmental or social characteristics and do not have sustainable investment as objective; no Taxonomy alignment disclosure required.
• Article 8 products (“light green”) — products that promote environmental or social characteristics; if the product has any commitment to Taxonomy-aligned investments, the Taxonomy alignment percentage must be disclosed.
• Article 9 products (“dark green”) — products that have sustainable investment as their objective; the Taxonomy alignment commitment and actual alignment must be disclosed.

The SFDR Delegated Regulation (EU) 2022/1288 (the SFDR RTS) specifies the technical content of the SFDR pre-contractual disclosures, periodic reports, and website disclosures. The Taxonomy alignment is disclosed as a percentage of the product's investment portfolio, with the calculation methodology relying on the underlying investee companies' Taxonomy KPIs (Turnover, CapEx, OpEx). The dependency chain is direct: a financial product's ability to disclose meaningful Taxonomy alignment depends on its portfolio companies being able to disclose Taxonomy KPIs — which depends on those companies being in CSRD scope.

The 2026 Omnibus scope reduction therefore has a knock-on SFDR effect. Portfolio companies that fall outside CSRD scope and stop disclosing Taxonomy KPIs become “unassessable” for the financial product's Taxonomy alignment calculation, typically contributing 0 to the aligned share. Financial product manufacturers have responded by encouraging voluntary opt-in disclosure from portfolio companies, particularly those bidding for Article 8 and Article 9 fund inclusion. The voluntary disclosure regime under the Omnibus Directive creates a market-pull mechanism: corporates outside mandatory scope choose to disclose voluntarily to remain investable for sustainable funds.

Interaction with the EU Green Bond Standard

The EU Green Bond Standard (Regulation (EU) 2023/2631) is a voluntary standard for bond issuers seeking the “European Green Bond” or “EuGB” designation. The regulation has applied since 21 December 2024. The Taxonomy is the eligibility anchor: an EU Green Bond's proceeds must be allocated to Taxonomy-aligned economic activities.

The integration mechanics:

• Use of proceeds: at least 85 percent of net proceeds must be allocated to economic activities that are Taxonomy-aligned; up to 15 percent may be allocated to activities that meet substantial contribution and DNSH but for which no Technical Screening Criteria exist yet, provided the activities meet the same criteria as Taxonomy-aligned activities to the extent possible.
• External review: EU Green Bonds must be reviewed by an external reviewer registered with ESMA under the Regulation. The external reviewer assesses the alignment of the bond's use of proceeds with the Taxonomy.
• Pre-issuance and post-issuance disclosure: the issuer publishes a factsheet before issuance describing the use of proceeds and the Taxonomy alignment basis, and publishes allocation reports and impact reports post-issuance documenting the actual allocation.
• Optional disclosures for non-EuGB sustainable bonds: the Regulation also provides voluntary templates for issuers of bonds marketed as environmentally sustainable or sustainability-linked but not designated as EuGBs. The templates allow Taxonomy-based disclosure without the full EuGB compliance burden.

The external reviewer regime is operational. Commission Delegated Regulation (EU) 2025/2180 of 12 September 2025 supplementing Regulation (EU) 2023/2631 with regard to regulatory technical standards specifying the conditions for the registration of external reviewers, the criteria for assessing the sound and prudent management of external reviewers, the appropriateness of the knowledge, experience and training of the external reviewers' employees, and the conditions under which external reviewers can outsource their assessment activities sets the operational requirements for external reviewers, who must register with and be supervised by ESMA. Further RTS on external reviewer methodology were adopted by the Commission on 12 March 2026 and proceeding through scrutiny period.

The EU Green Bond Standard is voluntary — issuers can continue to issue bonds under the ICMA Green Bond Principles or other frameworks without the EuGB designation. The strategic question for issuers is whether the EuGB designation's incremental investor demand and pricing benefit justify the incremental Taxonomy-alignment compliance burden. As of mid-2026, EuGB issuance is growing but remains a minority of overall European green bond issuance, with sovereign and supranational issuers (the European Union, EIB, several Member States) leading EuGB adoption.

Interaction with MiFID II Sustainability Preferences

MiFID II as amended by Commission Delegated Regulation (EU) 2021/1253 requires investment firms providing investment advice or portfolio management to retail clients to incorporate the client's sustainability preferences into the suitability assessment. The sustainability preferences specifically include the share of investments aligned with the EU Taxonomy that the client wishes to hold.

The integration:

• The retail client is asked, as part of suitability profiling, whether they have a preference for sustainable investments, and if so, the proportion of their portfolio to be allocated to Taxonomy-aligned investments, SFDR Article 8 or 9 products, or investments considering principal adverse impacts (PAI).
• The distributor matches the client's expressed preference to available products based on the products' SFDR pre-contractual disclosures (which themselves reference Taxonomy alignment).
• If no matching product is available, the client may either adjust the preference or the distributor cannot recommend a product on a suitability basis.

The MiFID II sustainability preferences regime operates retail-distribution flow into the upstream Taxonomy classification system: retail clients exercising sustainability preferences create demand for SFDR-disclosed Taxonomy-aligned products, which creates demand for portfolio companies with high Taxonomy KPI alignment, which creates demand at the corporate level for CapEx aligned with the Taxonomy. The chain is operational across the EU since August 2022 (the date of application of Commission Delegated Regulation (EU) 2021/1253).

Interaction with TCFD and IFRS S2

The TCFD Recommendations (2017, with the framework absorbed into IFRS S2 in 2023) and IFRS S2 Climate-Related Disclosures (2023, amended December 2025) are the corporate climate disclosure frameworks that interact extensively with Taxonomy assessment.

The integration points:

• Physical risk assessment (TCFD Strategy, IFRS S2 paragraphs 22 and 26) provides the substantive basis for Taxonomy adaptation alignment substantial contribution and adaptation DNSH. An undertaking conducting physical risk assessment under IFRS S2 has substantially completed the work required for Taxonomy adaptation purposes.
• Transition risk assessment (TCFD Strategy, IFRS S2 paragraph 22) informs the Taxonomy mitigation TSC compliance — carbon pricing scenarios, regulatory cost projections, and stranded asset analyses all bear on whether transitional activities are on a viable alignment path.
• Scope 1, 2, 3 emissions (TCFD Metrics & Targets recommendation b, IFRS S2 paragraph 29) provide the GHG accounting data that feeds mitigation TSC compliance assessment. The dedicated IFRS S2 reference page and TCFD reference page cover these frameworks in full.
• Scenario analysis (TCFD Strategy recommendation c, IFRS S2 paragraph 22) supports both adaptation alignment (physical scenarios) and the resilience narrative around the CapEx KPI and the transition plan.

For multi-framework reporters — CSRD-scope in EU, IFRS S2 adopting jurisdictions globally — the procurement-side discipline is to design the climate-related disclosure machinery once, with sufficient granularity, and apply it across all reporting frameworks. The IFRS S2 climate risk assessment, the TCFD scenario analysis, the ESRS E1 transition plan, and the Taxonomy CapEx and adaptation assessments can all draw on the same underlying evidence base. The frameworks are different in detail but operationally complementary at the data layer.

Interaction with the GHG Protocol

The GHG Protocol Corporate Standard, Scope 3 Standard, and Scope 2 Guidance are the dominant subject-matter accounting standards for the Scope 1, 2, 3 emissions data that feeds Taxonomy mitigation TSC compliance and Taxonomy mitigation DNSH. The integration is direct: a corporate that has prepared its GHG inventory under the GHG Protocol has substantially the data layer needed to populate Taxonomy mitigation criteria for activities in scope.

The specific cross-references:

• Mitigation TSC for manufacturing, energy, transport, and buildings reference specific GHG emission thresholds expressed in absolute terms (kg CO₂e per unit) or intensity terms (g CO₂e per kWh).
• The GWP basis is IPCC AR6 for current Taxonomy assessments (the Climate Delegated Act and Environmental Delegated Act are aligned with IPCC AR6 GWP values for non-CO₂ gases).
• Scope 2 calculation methodology under the GHG Protocol Scope 2 Guidance (location-based vs market-based) affects how electricity-related emissions are quantified for TSC compliance. The dedicated GHG Protocol Scope 2 Guidance reference page covers the methodology in full.
• Scope 3 emissions data feeds Taxonomy assessments for value-chain-related activities (transport TSC, building TSC including embodied carbon, manufacturing TSC including upstream supply chain considerations).

The dedicated GHG Protocol Corporate Standard and Scope 3 Standard reference pages cover the accounting frameworks in full.

Interaction with SBTi

The Science Based Targets initiative validates corporate emissions reduction targets against pathways consistent with limiting warming to 1.5°C above pre-industrial levels. SBTi target validation and Taxonomy alignment are conceptually related but operationally distinct.

The relationship:

• SBTi validation assesses the corporate's target architecture against science-based pathways.
• Taxonomy alignment assesses the corporate's economic activities against activity-by-activity TSC.

An undertaking can have SBTi-validated targets and low Taxonomy alignment if its activities happen not to fall within the Taxonomy's currently covered sectors. Conversely, an undertaking can have high Taxonomy alignment and not have SBTi-validated targets if its activities are inherently aligned (e.g., a pure-play solar developer) without a separate science-based target architecture being in place.

An SBTi-validated target does not, by itself, satisfy Taxonomy mitigation substantial contribution criteria; the activity-specific TSC must still be met. However, for the CapEx KPI numerator part (b) — CapEx that is part of a plan to expand Taxonomy-aligned activities or transition eligible activities to alignment — the SBTi-validated transition plan can serve as substantive evidence of the planning rigour underpinning the CapEx allocation. The dedicated SBTi Corporate Net-Zero Standard reference page covers the SBTi framework in full.

Assurance over Taxonomy KPIs

Taxonomy KPI disclosures within the CSRD sustainability statement are subject to the CSRD assurance regime. The regime currently operates at limited assurance level from financial year 2024 onward; the Commission is required to adopt a reasonable assurance standard by 1 October 2028, after which the assurance trajectory moves to reasonable assurance.

The assurance covers the Taxonomy KPIs alongside the rest of the sustainability statement. The specific Taxonomy assurance risk areas:

• Activity mapping — whether the undertaking's economic activities have been correctly mapped to NACE codes and Taxonomy Delegated Act activity descriptions.
• Eligibility assessment — whether the undertaking has correctly identified eligible activities from the Delegated Act activity descriptions.
• Four-gate compliance — whether the substantial contribution criteria, DNSH criteria, Minimum Safeguards, and overall TSC compliance are substantively met and documented.
• KPI numerator and denominator construction — whether the turnover, CapEx, and OpEx KPIs are calculated in accordance with the Disclosures Delegated Act, with consistent application of the materiality threshold under the simplifying Delegated Act.
• Disclosure completeness — whether the disclosures include eligibility share, alignment share, breakdowns by environmental objective and activity category, and the narrative content required under the templates.

Assurance providers under the CSRD regime include audit firms (operating under IAASB standards including ISAE 3000 Revised, ISAE 3410, and ISSA 5000) and independent assurance providers accredited under ISO 14065 (operating under ISO 14064-3 for the GHG-specific components). The dedicated ISO 14064-3 Verification reference page covers the assurance methodology in full.

Sector-Specific Notes

Selected sector observations that surface most frequently in Taxonomy implementation:

• Energy and utilities. Electricity generation TSC are activity-and-technology specific. Solar PV, wind, hydropower, ocean energy, and geothermal pass mitigation substantial contribution without complex thresholds. Bioenergy requires specific feedstock and sustainability conditions. Gas-fired generation is permitted as transitional under the Complementary Climate Delegated Act under strict thresholds. Nuclear is permitted under the Complementary Climate Delegated Act with sunset dates. Transmission and distribution are eligible enabling activities. The renewable energy sector is the most Taxonomy-friendly sector by alignment share.
• Real estate and construction. Building TSC reference Energy Performance Certificate (EPC) ratings and primary energy demand thresholds. New construction must be at least 10 percent better than NZEB requirements. Building renovation must achieve a minimum 30 percent reduction in primary energy demand. Acquisition and ownership requires an EPC rating of A or top-15-percent national stock positioning. The sector is the most data-intensive for retail mortgage GAR purposes.
• Transport. Road transport TSC vary by vehicle category: passenger cars must have zero direct CO₂ emissions (BEV or FCEV) for current new vehicles; transitional thresholds apply to vehicles registered before 2026. Heavy-duty road transport has higher thresholds. Rail is broadly aligned. Aviation and maritime have specific TSC including sustainable aviation fuels and zero-emission maritime fuels.
• Manufacturing. Manufacturing TSC are sector-specific: cement, aluminium, iron and steel, hydrogen, chemicals each have separate emission thresholds. The transitional category is heavily used in manufacturing because most heavy-industry activities cannot achieve net-zero with current technology and must transition. Manufacture of low-carbon technologies (renewables, batteries, heat pumps) is treated as enabling activity.
• Financial services. Banks calculate GAR; asset managers calculate alignment ratios; insurance and reinsurance calculate underwriting and investment KPIs; investment firms calculate role-specific KPIs. The GAR denominator construction debate is most acute in this sector. The dependency on counterparty CSRD scope (and the Omnibus reduction in that scope) is most material in this sector.

Non-EU Companies and the Taxonomy

Non-EU companies engage with the EU Taxonomy through three pathways, each with distinct compliance implications.

Pathway 1: CSRD scope as a large EU subsidiary. Under CSRD, large EU subsidiaries of non-EU parent groups can be required to report on a sub-consolidated basis. The Omnibus amendment retains this principle but with the elevated 1,000 employees / €450 million threshold. A non-EU parent with EU subsidiaries that exceed the thresholds at the EU sub-consolidated level must prepare Taxonomy KPIs for the EU operations.

Pathway 2: CSRD scope as a non-EU undertaking with significant EU activity. CSRD Article 40a (the third-country undertaking provision) brings non-EU undertakings with significant EU activity into scope, requiring them to prepare sustainability statements covering their group activities. The Omnibus modifications have adjusted the timing and thresholds; the third-country undertaking provision is intended to apply from later reporting cycles than the original CSRD timeline. Specifics should be verified against the consolidated CSRD text as amended.

Pathway 3: EU capital markets access. Non-EU companies seeking EU capital — equity listing on EU exchanges, bond issuance into EU markets, sustainable fund inclusion — are increasingly expected to provide Taxonomy alignment data on a voluntary basis. This is a market-driven pathway, not a legal mandate, but the practical effect is that non-EU companies seeking sustainable European investor capital prepare Taxonomy disclosures as part of their investor materials. The Omnibus voluntary opt-in regime formalises this voluntary disclosure framework.

The technical challenge for non-EU activities is that the TSC are designed for the EU regulatory context. EU-specific references include the EU Energy Performance of Buildings Directive (for building TSC), EU Water Framework Directive (for water DNSH), REACH Regulation (for pollution DNSH), and EU electricity grid factors (for some Scope 2-related considerations). Non-EU activities are assessed against the TSC by translating the EU regulatory references to local equivalents — a building in California meeting Title 24 energy standards being equivalent to NZEB, a manufacturing site complying with US EPA chemical regulations being equivalent to REACH-compliant practice, etc. The translation requires careful documentation and is one of the areas where audit firm and assurance provider technical capability matters most.

For non-EU parent groups, the third-mandate Platform on Sustainable Finance work on TSC revision in 2026 is expected to address some of the EU-centric drafting in the original Delegated Acts, with implications for how non-EU operations are assessed. Practitioners are watching the 2026 revision closely.

The Social Taxonomy — Current Status

The Social Taxonomy is, as of May 2026, a Platform on Sustainable Finance recommendation without legislative status. The Platform published its Final Report on Social Taxonomy in February 2022, proposing a framework with three social objectives (decent work, adequate living standards and well-being, inclusive and sustainable communities and societies) linked to three stakeholder groups (workers, end-users, affected communities). Currently, the EU Social Taxonomy is not legally binding legislation. It is a proposed framework from the Platform on Sustainable Finance, and its future legislative status is yet to be determined by the European Commission.

The political trajectory through 2025–2026 has not favoured a Social Taxonomy legislative initiative. The Commission's focus under the Omnibus simplification agenda has been on reducing reporting burden, not expanding the classification system. The Platform under its third mandate (February 2026 — end-2027) is focused on environmental TSC revision, transition finance categories, and usability improvements rather than Social Taxonomy development.

The practical implication for corporates is that the Minimum Safeguards (Gate 3 in section 9) remain the only socially oriented element of the current Taxonomy. The four-topic Minimum Safeguards assessment (human rights, bribery and corruption, taxation, fair competition) is the only social-and-governance test in the four-gate sequence. Corporates seeking to demonstrate social performance beyond Minimum Safeguards rely on the broader ESRS social topical standards (ESRS S1 own workforce, S2 workers in value chain, S3 affected communities, S4 consumers and end-users), the GRI Standards, the UN Sustainable Development Goals framework, or third-party social ratings.

Whether a Social Taxonomy emerges in the longer term is uncertain. The intellectual case has been made; the political and institutional path is unclear. Practitioner attention is appropriately directed to environmental Taxonomy implementation in the near term, with the Social Taxonomy as a possible future development to be monitored rather than a current planning requirement.

The Taxonomy Compass — How to Use It

The EU Taxonomy Compass is the European Commission's official lookup tool for the Technical Screening Criteria. It allows users to search by NACE code, activity description, or environmental objective, and returns the applicable TSC for substantial contribution and DNSH across all six objectives, together with the activity classification (substantial contribution, transitional, or enabling) and any phasing or threshold details.

How to use the Compass effectively:

1. Start with the NACE code. Map the corporate's economic activity to the appropriate four-digit NACE code; the Compass uses NACE codes as the primary navigation index.
2. Identify the activity description. The Compass returns one or more Taxonomy activity descriptions associated with the NACE code; the corporate selects the description that best matches its operational reality.
3. Read the substantial contribution TSC. The Compass displays the substantial contribution criteria for the activity, including any quantitative thresholds, technology requirements, or operational conditions.
4. Read the DNSH criteria for each non-primary objective. The Compass displays the DNSH criteria the activity must meet for the other five environmental objectives.
5. Cross-reference to the primary Delegated Act text. The Compass is a navigation aid, not the legal text. For substantive interpretation, particularly in edge cases, the corporate must work from the Delegated Act text itself.

The Compass has limitations. It is updated as Delegated Acts are amended but with some lag. It does not address every interpretive edge case. It cannot substitute for legal and technical advice on ambiguous activity classifications. For the simplified post-Omnibus assessment framework, the Compass remains the navigation tool of choice but practitioners should verify the version reflects the 4 July 2025 simplifying Delegated Act.

Implementation Workflow Step by Step

The eight-stage workflow for a non-financial undertaking implementing Taxonomy disclosure under the 2026 regime:

Stage 1: Scope determination

Confirm whether the undertaking is in mandatory CSRD/Taxonomy scope under Directive (EU) 2026/470 (over 1,000 employees AND over €450 million net turnover). If out of mandatory scope, decide whether voluntary opt-in reporting is commercially warranted.

Stage 2: Activity mapping

Map operational activities to NACE codes and to Taxonomy Delegated Act activity descriptions using the Taxonomy Compass. Identify which activities are eligible.

Stage 3: Materiality screen

Apply the 10 percent materiality threshold under the simplifying Delegated Act. Identify activities below threshold (eligibility-only assessment) and activities above threshold (full alignment assessment).

Stage 4: Substantial contribution assessment

For each material eligible activity, assess substantial contribution against the relevant TSC. Document the quantitative and qualitative evidence supporting compliance.

Stage 5: DNSH assessment

For each material eligible activity, assess DNSH against the other five environmental objectives. Particular attention to climate adaptation DNSH (climate risk and vulnerability assessment), pollution prevention DNSH (post-simplification chemical criteria), and biodiversity DNSH.

Stage 6: Minimum Safeguards assessment

Conduct the four-topic Minimum Safeguards assessment (human rights, bribery and corruption, taxation, fair competition). Document the substantive procedures and any incident screening results.

Stage 7: KPI calculation and disclosure

Calculate Turnover KPI, CapEx KPI, and OpEx KPI per the Disclosures Delegated Act as amended, using the streamlined templates. Disclose eligibility share, alignment share, breakdowns by objective and activity category, and the narrative content required.

Stage 8: Assurance

The CSRD sustainability statement (including Taxonomy KPIs) is subject to limited assurance under the current regime; reasonable assurance trajectory by 1 October 2028. Engagement with the assurance provider is typically a 12–18 month forward planning horizon.

Common Misinterpretations

Common Reporting Errors

Six categories of reporting error that surface routinely in 2026 Taxonomy disclosures:

1. CapEx numerator over-inclusion. CapEx that is general corporate (head office buildings, IT infrastructure without a specific Taxonomy-aligned purpose) is sometimes included in the CapEx KPI numerator without supporting documentation linking it to aligned activities. The numerator construction (parts a, b, c) is specific and requires documentation.
2. DNSH assessment gaps for non-primary objectives. Many undertakings assess DNSH thoroughly for the primary environmental objective the activity contributes to, but cursorily for the other five objectives. The five separate DNSH assessments require equal rigor.
3. Minimum Safeguards as a box-tick. Declaring Minimum Safeguards compliance without performing the substantive four-topic assessment. Audit firms increasingly require the underlying evidence.
4. Activity boundary misclassification. An activity is treated as Taxonomy-aligned at the corporate level when in fact only a sub-activity within it meets the TSC. The disaggregation to the eligible-activity level is necessary.
5. Materiality threshold misapplication. The simplifying Delegated Act's 10 percent materiality threshold applies to alignment assessment, not eligibility assessment. Activities below threshold must still be assessed for eligibility; only the alignment assessment is optional.
6. Methodology inconsistency between reporting periods. Activity classifications, materiality thresholds, or assessment methodology applied inconsistently between reporting periods without disclosed restatement.

What the Taxonomy Does Not Cover

• Social performance beyond Minimum Safeguards. Detailed social KPIs (workforce composition, supply chain labour conditions, community impact) are addressed under ESRS S1–S4 and the GRI Standards, not the Taxonomy.
• Governance. Board structure, executive remuneration alignment with sustainability, anti-corruption practices beyond Minimum Safeguards are addressed under ESRS G1 and other governance frameworks.
• Non-EU regulatory contexts. The TSC are designed for the EU regulatory context; non-EU activities require careful translation of EU references to local equivalents.
• Voluntary sustainability claims outside the regulated disclosure perimeter. Marketing claims, advertising, and voluntary disclosures outside CSRD/SFDR/EU GBS scope are not directly regulated by the Taxonomy.
• Carbon credits and carbon offsets. The Taxonomy classifies the underlying economic activity, not the carbon credit unit. Carbon credits from a Taxonomy-aligned project are not, by virtue of their origin, Taxonomy-eligible financial instruments.
• Adequacy of the corporate's climate strategy. Taxonomy alignment measures activity classification; the strategic adequacy of the corporate's climate targets, transition plan, and capital allocation strategy is addressed by SBTi validation, ESRS E1 transition plan disclosure, and investor stewardship.

Future Evolution

Four trajectories will shape the EU Taxonomy through the late 2020s.

Comprehensive TSC revision under the third Platform mandate. The European Commission has launched a call for feedback on 17 March 2026 on the revision of criteria for sustainable economic activities, and revised Delegated Acts updating TSC across all six objectives are planned for adoption in the course of 2026. The revision will address usability concerns, expand sector coverage, and refine quantitative thresholds. CSRD-scope undertakings should anticipate that the FY 2026 and FY 2027 disclosures may be prepared under revised TSC.

Implementation of the simplified ESRS and revised Taxonomy templates. The simplified ESRS delegated act is expected by September 2026, with the first reports under simplified ESRS covering FY 2027 (due in 2028). The Taxonomy reporting templates have already been streamlined under the simplifying Delegated Act in force since 28 January 2026.

The voluntary opt-in regime and the VSME standard. The Omnibus Directive's voluntary opt-in regime for undertakings below the mandatory threshold, combined with the forthcoming VSME standard (delegated act expected in 2026), will create a tiered disclosure landscape. The voluntary tier may evolve into a meaningful market-pull mechanism if banks, asset managers, and large customers consistently require voluntary disclosure for sustainable financing access.

Transition finance integration and possible category expansion. The Platform on Sustainable Finance has been mandated to advise on transition finance — activities that are not currently Taxonomy-aligned but are on a credible path to alignment. The third mandate will examine how transition finance should be reflected in the classification framework. A fourth activity category (partial alignment / transition) may emerge in revised Delegated Acts beyond the current substantial contribution / transitional / enabling architecture.

Frequently Asked Questions

Sources and References

Every claim and methodological statement on this page reconciles to the primary sources below. Where a regulator, the Commission, or the Platform on Sustainable Finance has published a definitive document, the primary source is cited directly; secondary commentary is used only for interpretation of operational practice.

Primary EU regulatory documents

• European Parliament and Council, Regulation (EU) 2020/852 of the European Parliament and of the Council of 18 June 2020 on the establishment of a framework to facilitate sustainable investment, and amending Regulation (EU) 2019/2088, OJ L 198, 22 June 2020, pp. 13–43 (Taxonomy Regulation).
• European Commission, Commission Delegated Regulation (EU) 2021/2139 of 4 June 2021 supplementing Regulation (EU) 2020/852 establishing the technical screening criteria for determining the conditions under which an economic activity qualifies as contributing substantially to climate change mitigation or climate change adaptation, and for determining whether that economic activity causes no significant harm to any of the other environmental objectives (Climate Delegated Act).
• European Commission, Commission Delegated Regulation (EU) 2021/2178 of 6 July 2021 supplementing Regulation (EU) 2020/852 by specifying the content and presentation of information to be disclosed by undertakings subject to Articles 19a or 29a of Directive 2013/34/EU concerning environmentally sustainable economic activities, and specifying the methodology to comply with that disclosure obligation (Disclosures Delegated Act).
• European Commission, Commission Delegated Regulation (EU) 2022/1214 of 9 March 2022 amending Delegated Regulation (EU) 2021/2139 as regards economic activities in certain energy sectors and Delegated Regulation (EU) 2021/2178 as regards specific public disclosures for those economic activities, OJ L 188, 15 July 2022 (Complementary Climate Delegated Act).
• European Commission, Commission Delegated Regulation (EU) 2023/2485 of 27 June 2023 amending Delegated Regulation (EU) 2021/2139, OJ L of 21 November 2023 (Climate Delegated Act amendment).
• European Commission, Commission Delegated Act of 4 July 2025 amending Delegated Regulation (EU) 2021/2178, Delegated Regulation (EU) 2021/2139 and Delegated Regulation (EU) 2023/2486 (simplifying Delegated Act); published in the Official Journal 8 January 2026; in force 28 January 2026 with retroactive application from 1 January 2026.
• European Parliament and Council, Directive (EU) 2022/2464 of 14 December 2022 amending Regulation (EU) No 537/2014, Directive 2004/109/EC, Directive 2006/43/EC and Directive 2013/34/EU, as regards corporate sustainability reporting (CSRD).
• European Parliament and Council, Directive (EU) 2025/794 of 14 April 2025 amending Directives (EU) 2022/2464 and (EU) 2024/1760 as regards the dates from which the Member States are to apply certain corporate sustainability reporting and due diligence requirements (‘Stop-the-Clock’ Directive).
• European Parliament and Council, Directive (EU) 2026/470 of 24 February 2026 amending Directives 2006/43/EC, 2013/34/EU, (EU) 2022/2464 and (EU) 2024/1760 as regards certain corporate sustainability reporting requirements and certain corporate sustainability due diligence requirements, OJ of 26 February 2026 (‘Omnibus’ Directive); applies from 18 March 2026.
• European Parliament and Council, Regulation (EU) 2019/2088 of 27 November 2019 on sustainability-related disclosures in the financial services sector (SFDR).
• European Commission, Commission Delegated Regulation (EU) 2022/1288 of 6 April 2022 supplementing Regulation (EU) 2019/2088 (SFDR RTS).
• European Parliament and Council, Regulation (EU) 2023/2631 of 22 November 2023 on European Green Bonds and optional disclosures for bonds marketed as environmentally sustainable and for sustainability-linked bonds, OJ L of 30 November 2023 (EU Green Bond Standard); applies from 21 December 2024.
• European Commission, Commission Delegated Regulation (EU) 2021/1253 of 21 April 2021 amending Delegated Regulation (EU) 2017/565 as regards the integration of sustainability factors, risks and preferences into certain organisational requirements and operating conditions for investment firms (MiFID II sustainability preferences).
• European Parliament and Council, Regulation (EU) 2019/2089 of 27 November 2019 amending Regulation (EU) 2016/1011 as regards EU Climate Transition Benchmarks, EU Paris-aligned Benchmarks and sustainability-related disclosures for benchmarks.
• European Parliament and Council, Regulation (EU) 2023/2859 of 13 December 2023 establishing a European single access point providing centralised access to publicly available information of relevance to financial services, capital markets and sustainability (ESAP Regulation).

Platform on Sustainable Finance reports

• Platform on Sustainable Finance, Final Report on Social Taxonomy, February 2022.
• Platform on Sustainable Finance, The Extended Environmental Taxonomy: Final Report on Taxonomy extension options supporting a sustainable transition, March 2022.
• Platform on Sustainable Finance, Final Report on Minimum Safeguards, October 2022.
• Platform on Sustainable Finance, Platform Recommendations on Data and Usability, October 2022.
• Platform on Sustainable Finance, Simplifying the EU Taxonomy to Foster Sustainable Finance, February 2025.
• Platform on Sustainable Finance, Advancing sustainable finance: Technical criteria for new activities & first review of the Climate Delegated Act, 2025.
• European Commission, Announcement of members of third mandate of Platform on Sustainable Finance, running February 2026 to end 2027, 21 January 2026.
• European Commission, Call for feedback on the revision of criteria for sustainable economic activities, 17 March 2026.

Court of Justice of the European Union

• General Court of the European Union, Austria v Commission, Case T-625/22, judgement of 10 September 2025 (rejecting Austria's action for annulment of Commission Delegated Regulation (EU) 2022/1214).

Subject-matter accounting standards

• World Resources Institute & World Business Council for Sustainable Development, The Greenhouse Gas Protocol: A Corporate Accounting and Reporting Standard, revised edition 2004.
• World Resources Institute & World Business Council for Sustainable Development, Corporate Value Chain (Scope 3) Accounting and Reporting Standard, 2011.
• World Resources Institute & World Business Council for Sustainable Development, GHG Protocol Scope 2 Guidance, 2015.
• International Organization for Standardization, ISO 14064-1:2018; ISO 14064-3:2019; ISO 14065:2020; ISO 14066:2011.
• International Sustainability Standards Board, IFRS S2 Climate-Related Disclosures, 26 June 2023, as amended 11 December 2025.
• Intergovernmental Panel on Climate Change, Sixth Assessment Report (AR6), Working Group I, 2021. Table 7.SM.7 GWP-100 values.
• European Financial Reporting Advisory Group (EFRAG), European Sustainability Reporting Standards (ESRS 1, ESRS 2, ESRS E1 et seq.); EFRAG technical advice on simplified ESRS, December 2025.

Related GreenCalculus reference pages

• CSRD / ESRS E1 — the disclosure directive that vehicles Taxonomy KPIs into corporate reporting
• IFRS S2 Climate-Related Disclosures — the climate disclosure framework that informs adaptation TSC and DNSH
• ISO 14064-3 Verification — the GHG-specific assurance methodology for Taxonomy KPIs
• GHG Protocol Corporate Standard — the accounting standard for mitigation TSC compliance
• GHG Protocol Scope 2 Guidance — market vs location-based electricity accounting under TSC
• SBTi Corporate Net-Zero Standard — the target validation framework complementary to Taxonomy activity classification
• TCFD Recommendations — the predecessor climate disclosure framework
• ISO 14064-1 — the organisation-level GHG inventory standard underlying mitigation assessments

What changed in this revision

Updated 12 May 2026. Initial publication. Reflects the operative state of the EU Taxonomy as of May 2026, incorporating: Regulation (EU) 2020/852 (Taxonomy Regulation); the four operative Delegated Acts (Climate Delegated Act (EU) 2021/2139, Disclosures Delegated Act (EU) 2021/2178, Complementary Climate Delegated Act (EU) 2022/1214 on gas and nuclear, Environmental Delegated Act (EU) 2023/2486 covering the four non-climate objectives); the simplifying Delegated Act adopted by the Commission on 4 July 2025, published in the Official Journal on 8 January 2026, in force from 28 January 2026 with retroactive application from 1 January 2026; the ‘Omnibus’ Directive (EU) 2026/470 adopted by the Council on 24 February 2026, published in the OJ on 26 February 2026, applying from 18 March 2026 and reducing the CSRD/Taxonomy mandatory scope to EU undertakings with over 1,000 employees and over €450 million net turnover; the ‘Stop-the-Clock’ Directive (EU) 2025/794 of 14 April 2025; the General Court's judgement in Austria v Commission of 10 September 2025 upholding the Complementary Climate Delegated Act; the third mandate of the Platform on Sustainable Finance running February 2026 to end-2027; the Commission's call for feedback of 17 March 2026 on the comprehensive TSC revision; the operative status of the EU Green Bond Standard (Regulation (EU) 2023/2631) since 21 December 2024 with Commission Delegated Regulations (EU) 2025/753, 2025/754, 2025/755, 2025/2179, 2025/2180 and the further Delegated/Implementing Regulations adopted on 12 March 2026; and the integration with CSRD, SFDR, MiFID II sustainability preferences, TCFD, IFRS S2, GHG Protocol, ISO 14064 suite, and SBTi.