Connecticut Electricity Rates per kWh: Eversource, UI and What Delivery Costs

Two lines on a Connecticut electric bill are negative this year, and together they take $15 to $29 off a 700 kWh month. They last until 30 April 2027. Here is every line on the bill, and what happens to each next.

A 700 kWh bill, read line by line

A Connecticut bill carries more lines than almost any in the country, and they do not all point the same way. We took the rates the Office of Consumer Counsel lists for each company today and worked out a 700 kWh month, the size it uses in its own examples.

Supply is less than half of either total. On Eversource, $81.06 goes to the power and about $93 to everything else. On UI the split is $83.65 and about $100. Those extra dollars are why a supplier’s 1¢ discount moves a bill by only $7.

The conservation line is shown at its 0.6¢ ceiling: the guide lists a 0.3¢ state charge and up to 0.3¢ more, without a figure for each company. Your own bill may differ by small sums. The rate per kWh behind each line is in the OCC guide linked below.

Why two public benefits lines turned into credits

Look for the minus signs. For the year to 30 April 2027, the systems benefits charge and the federally mandated congestion charge are both credits: together $15.15 at 700 kWh on Eversource and $28.99 on UI.

They exist because regulators reset those charges on 22 April 2026, in Dockets 26-01-03 and 26-01-04. PURA cut about 4.3¢ per kWh for Eversource, near $30 a month on an average bill, and about 4.9¢ for UI, near $34. Lower costs for hardship programmes and for the Millstone and Seabrook nuclear contracts drove the change. PURA called the approval conditional and kept open an adjustment after reviewing actual revenue and spending.

Here is the catch for anyone budgeting ahead. A credit like this is a yearly true-up, not a permanent price. If both lines merely returned to zero on 1 May 2027, with nothing else moving, a 700 kWh month would rise by about $15 on Eversource and $29 on UI. That is our illustration, not a forecast; the charges could come in higher or lower, and the May 2026 filings will not be the last word.

1 January decides the winter price

Standard service changes twice a year, on 1 January and 1 July, and the winter half has been the dearer one. This table is the last three prices from the Consumer Counsel’s advisory.

Each 1¢ on the January price adds $7 to a 700 kWh month and more to a heated home’s January. The Consumer Counsel put this summer’s price down to higher costs from the war with Iran and a colder 2025–26 winter. The May and July changes together took about $38 a month, or 18%, off an average Eversource bill and about $50, or 18%, off UI’s.

UI’s July figure also carries a one-year credit. The company told PURA it had over-collected on a 2024 Mystic plant fuel charge, and it is handing that back through standard service until mid-2027, which is why its filing dropped from 11.98¢ to 11.95¢.

Price an offer against the next six months

Enter the supplier’s price in the supply box and pick your company to bring in delivery. To see what you pay today, type your standard service price instead. A price that beats 11.58¢ this month tells you little if your contract runs past New Year, so run it a second time once the January price is published.

UI costs more to deliver, then hands more back

UI’s distribution rate of 11.3469¢ is nearly twice Eversource’s 5.844¢. Add Eversource’s separate 2.031¢ for grid improvements and the gap is still about 3.5¢. Then UI’s bigger credits close most of that gap: at 700 kWh, it finishes about $9 above Eversource rather than $23.

UI also has the higher fixed charge, $13.02 against $9.62, so a light user feels the difference more. Across 2025, UI’s standard service homes averaged 35.40¢ per kWh all told and Eversource’s 28.88¢, while delivery for supplier customers cost 20.17¢ and 18.65¢. Municipal systems in Wallingford, Groton and Norwich paid less than either.

— in the last two columns: the utility reported no homes on delivery-only service to EIA for 2025, so none of its homes bought power from a supplier. All 3 are city utilities, public districts or co-ops.

EIA-861 for 2025: each utility’s revenue from homes divided by the kWh they used, so monthly charges are spread into the price.

Heavier users still paid more with a supplier

Supplier customers, 252,209 homes in 2025, averaged 30.74¢ per kWh, while their own company’s standard service would have come to 30.21¢. Bigger users normally get a lower average, because the fixed charge is spread thinner, and supplier homes used more, so usage does not excuse the result.

Worked out from EIA-861 for 2025: suppliers’ revenue from homes plus the utilities’ delivery-only revenue, divided by the kWh, against the same kWh at each utility’s default-service price per kWh. Aggregation programmes count as suppliers. The averages hide wide differences between contracts.

When a supplier can beat standard service

The window is narrow, because supply is under half the bill and the state price resets each January and July. A fixed deal can pay off in the January half, when standard service has run highest, and lose in the July half. Look at the whole term, not the month you sign.

EIA-861 for 2025, Sales to Ultimate Customers (residential): every utility, supplier and retail provider’s own report.

EnergizeCT runs the state rate board that shows every current offer. It refused our automated checks on 6 November, so we have not quoted offers here. Open it yourself, sort by price, and check three things: term, monthly fee and what the rate becomes at the end. PURA’s approved standard service is the fallback, and you can return to it.

Two peaks a year on the bill

The average home’s bill went from October 2025 ($145) at its lowest to January 2026 ($245) at its highest. In the year to August 2026, January’s bill reached $245 even at an average price near 28¢, higher than the $222 in July when homes used more power at about 24¢. Winter pairs the January supply price with electric heat, so a kWh in January costs more than the same kWh in July.

The 2022–23 step never fully reversed

From 19.25¢ per kWh in 2010, the state’s average reached 27.42¢ over the last 12 months, up 42%. New England’s gas supply is tight in winter, and the winter of 2022–23 sent standard service to its highest level; 34.48¢ in April 2023 is the record month. Much of today’s price sits in those delivery and public policy lines rather than the power.

Heaviest users in New England

Connecticut ranks 4th of 6 in New England on price and 7th nationally, but 3rd of 51 on the yearly bill. Its homes burn more electricity than any of the five other states in the region, and that lifts the bill above where the price alone would put it.

Across the border: New York 28.60¢, Rhode Island 29.48¢, Massachusetts 30.39¢.

All 50 states and DC on one page, with a map.

Reading the monthly swings

EIA’s series for this state fell by about 23% in July 2022, then rose about 37% in January 2023, on those standard service resets. These are reported figures.

Our 700 kWh table uses rates from the OCC guide and the May 2026 advisory. It is not a copy of any company’s bill and leaves out rounding and any gross earnings tax that a company shows separately. UI’s rates come from the same guide. We could not reach uinet.com on 6 November, so the UI figures rest on the Consumer Counsel’s listing.

Figures to August 2026 (EIA marks recent months preliminary), utility figures for 2025, refreshed 3 November 2026. How every number in this series is made and checked.

• Connecticut, every month since 2010 (CSV): price per kWh, kWh and bill per home, and the US price.
• Every state, DC and the US (CSV)
• Everything above with the utility and supplier figures (JSON)

EIA data is in the public domain: credit the U.S. Energy Information Administration. A link back is welcome.

Questions

Electricity rates in other states

Version history

• 2.0 (6 November 2026): rebuilt around current rates: a line-by-line 700 kWh bill for Eversource and UI, the public benefits credits and when they end, the last three standard service prices, and supplier timing.
• 1.1.1 (November 2026): wording and page heading tidied; no figures changed.
• 1.0 (November 2026): first published.