Connecticut electricity rates: still high, now falling fastest

The largest price drop of any state

Connecticut's residential customers paid an average of 27.42¢ per kWh¹ over the 12 months from September 2025 to August 2026. That is average revenue per kWh: everything homes paid their utility and, where they shop, their supplier, divided by the electricity they used. It includes customer charges and riders, it covers homes on the utility's standard service and those with a supplier, and it is not the price printed on any one bill.

The figure is 9.0% lower than in the previous 12 months. The US average rose 6.5% over the same period. The single-month comparison is sharper still. In August 2026 Connecticut homes paid 24.51¢ per kWh, against 30.17¢ per kWh in August 2025, a fall of 18.8%, while the US average for the month was +3.4% on a year earlier. For January to August 2026 the state average was −9.1%¹ on the same months of 2025. Monthly figures for 2026 are preliminary.

ConnecticutUnited States

Source: EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Average revenue per kWh (all charges, nominal dollars), each month; summer and winter months differ by season. Monthly EIA data through August 2026 (released October 23, 2026); months since January 2026 are preliminary.

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Period	Connecticut (¢/kWh)	United States (¢/kWh)
Jan 2023	30.29¢	15.47¢
Feb 2023	34.38¢	15.98¢
Mar 2023	33.06¢	16.04¢
Apr 2023	34.48¢	16.10¢
May 2023	31.36¢	16.14¢
Jun 2023	31.85¢	16.09¢
Jul 2023	26.63¢	15.86¢
Aug 2023	27.94¢	15.91¢
Sep 2023	29.31¢	16.27¢
Oct 2023	29.01¢	16.48¢
Nov 2023	26.98¢	16.19¢
Dec 2023	26.89¢	15.69¢
Jan 2024	27.34¢	15.41¢
Feb 2024	29.51¢	16.10¢
Mar 2024	29.12¢	16.67¢
Apr 2024	29.59¢	16.86¢
May 2024	26.75¢	16.40¢
Jun 2024	25.97¢	16.38¢
Jul 2024	28.00¢	16.62¢
Aug 2024	29.96¢	16.60¢
Sep 2024	33.05¢	16.82¢
Oct 2024	30.00¢	17.09¢
Nov 2024	29.15¢	16.85¢
Dec 2024	28.12¢	16.27¢
Jan 2025	29.94¢	15.92¢
Feb 2025	33.12¢	16.40¢
Mar 2025	32.43¢	17.03¢
Apr 2025	32.17¢	17.20¢
May 2025	31.52¢	17.33¢
Jun 2025	27.12¢	17.44¢
Jul 2025	27.54¢	17.39¢
Aug 2025	30.17¢	17.57¢
Sep 2025	30.41¢	18.05¢
Oct 2025	27.66¢	17.95¢
Nov 2025	26.97¢	17.77¢
Dec 2025	25.24¢	17.11¢
Jan 2026	28.30¢	17.45¢
Feb 2026	30.77¢	17.65¢
Mar 2026	30.45¢	18.60¢
Apr 2026	32.24¢	18.86¢
May 2026	27.37¢	18.44¢
Jun 2026	24.32¢	18.34¢
Jul 2026	24.16¢	18.31¢
Aug 2026	24.51¢	18.16¢

The decline was not limited to homes. Over the same 12 months the commercial average fell 7.3% to 21.69¢ per kWh and the industrial average fell 6.7% to 17.73¢ per kWh. Ranked by change, Connecticut's commercial decline was the lowest among the states and its industrial decline 2nd lowest. Both remain far above the national averages: commercial customers paid 56.4% above the US average, industrial customers 99.0% above the US average¹.

What changed in May and July 2026

The timing points to two regulatory steps. In April 2026 the Public Utilities Regulatory Authority (PURA) conditionally approved lower rates for Eversource and United Illuminating from May 1, 2026, in interim decisions; it said lower public benefits charges drove the decreases, citing the nuclear energy contracts with Millstone and Seabrook and lower hardship protection costs. In September 2026 the governor's office announced state bonding to keep the reduction in public benefits costs in place through at least April 30, 2027, and said supply rates that took effect on July 1, 2026 had also come down.

EIA's monthly data show the step. Over the last 12 months the state's monthly residential average ranged from 32.24¢ per kWh in April 2026 to 24.16¢ per kWh in July 2026. At the two large utilities, the August 2026¹ average for full-service customers changed by −22.6% on a year earlier at Eversource and by −21.4%³ at United Illuminating, according to EIA's monthly utility sample.

The cut follows a long rise. Connecticut's annual residential average went from 10.90¢ per kWh⁴ in 2001 to 29.31¢ per kWh in 2025, an increase of 168.9%, the 2nd highest among the states over that period (US: 100.8%). The annual average rose in 18 of the years since 2002; the latest annual decline was in 2024, and 2025 added 1.9%⁵.

ConnecticutUnited States

Source: EIA, Historical state data, annual sales, revenue and customers; EIA, Historical state data, monthly sales and revenue 1990-2009. Average revenue per kWh (all charges, nominal dollars), each calendar year: 2010 onward EIA-861 final annual data, 2001–2009 the sum of the monthly survey.

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Period	Connecticut (¢/kWh)	United States (¢/kWh)
2001	10.90¢	8.58¢
2002	10.96¢	8.44¢
2003	11.31¢	8.72¢
2004	11.63¢	8.95¢
2005	13.64¢	9.45¢
2006	16.86¢	10.40¢
2007	19.11¢	10.65¢
2008	19.54¢	11.26¢
2009	20.33¢	11.51¢
2010	19.25¢	11.54¢
2011	18.11¢	11.72¢
2012	17.34¢	11.88¢
2013	17.55¢	12.13¢
2014	19.75¢	12.52¢
2015	20.94¢	12.65¢
2016	20.01¢	12.55¢
2017	20.29¢	12.89¢
2018	21.20¢	12.87¢
2019	21.87¢	13.01¢
2020	22.71¢	13.15¢
2021	21.91¢	13.66¢
2022	24.61¢	15.04¢
2023	29.88¢	16.00¢
2024	28.75¢	16.48¢
2025	29.31¢	17.23¢

Next to New York, Massachusetts and Rhode Island

Of Connecticut's 3 neighbors, 0 had a lower residential average than Connecticut over the last 12 months. Among the neighbors, New York had the lowest average (28.60¢ per kWh) and Massachusetts the highest (30.39¢ per kWh). Nationally, Connecticut's 12-month average ranks 7th highest, 9.38¢ per kWh more than the US average; in the 2025 annual figures it ranked 5th highest⁵, and in August 2026 alone 11th highest¹.

Massachusetts30.39¢

Rhode Island29.44¢

New York28.60¢

Connecticut27.42¢

United States18.04¢

Source: EIA, Electric Power Monthly / EIA-861M sales and revenue by state. Residential revenue divided by kilowatt-hours sold over the 12 months 2025-09 to 2026-08 (EIA-861M; months since January 2026 preliminary). Average revenue per kWh, all charges included; not a tariff. Period: September 2025 to August 2026.

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Area	Residential ¢/kWh, 12 months
Massachusetts	30.39¢
Rhode Island	29.44¢
New York	28.60¢
Connecticut	27.42¢
United States	18.04¢

Eversource, United Illuminating and the town utilities

Two investor-owned utilities deliver almost all of Connecticut's electricity. Eversource, legally The Connecticut Light and Power Company, has 76.3% of the state's residential customers on its wires and reports service in 8 of the state's 8 counties (the legacy counties EIA still reports). United Illuminating has 20.1%, with service reported in 2 counties (Fairfield County and New Haven County⁷). The rest is mostly municipal: Town of Wallingford, City of Norwich and Groton Dept of Utilities are the largest. The state has 0⁶ electric cooperatives.

The price gap between them is wide. Among the 5 utilities with 10,000 or more full-service residential customers in 2025, United Illuminating had the highest average (35.40¢ per kWh) and Town of Wallingford the lowest (17.78¢ per kWh), a spread of 17.62¢ per kWh. United Illuminating's full-service customers paid 35.40¢ per kWh, the 5th highest of 177 utilities with 100,000 or more residential customers nationally; Eversource's paid 28.88¢ per kWh. Taken together, the public power utilities' customers paid 19.54¢ per kWh and the investor-owned utilities' full-service customers 29.97¢ per kWh⁶. The two large utilities' figures cover only their customers on standard service, not those who buy supply from a supplier.

Town of Wallingford17.78¢

Groton Dept of Utilities18.05¢

City of Norwich23.35¢

Eversource28.88¢

Connecticut average29.31¢

United Illuminating35.40¢

Source: EIA-861 annual electric power industry report, 2025 final. Utilities with 10,000 or more bundled (full-service) residential customers. Revenue divided by kWh sold, all charges included, EIA-861 2025 final. Darker bars have their own page. In this state, customers who buy supply from a competitive supplier are not in these averages (they pay delivery to the utility and supply to the supplier).

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Utility	¢/kWh
Town of Wallingford	17.78¢
Groton Dept of Utilities	18.05¢
City of Norwich	23.35¢
Eversource	28.88¢
Connecticut average	29.31¢
United Illuminating	35.40¢

The highest price does not mean the highest bill. United Illuminating's full-service customers used 516 kWh a month in 2025, against 677 kWh at Eversource, so their average bill was lower: $182.78 against $195.35⁶.

United Illuminating (CT)516

Eversource (CT)677

Source: EIA-861 annual electric power industry report, 2025 final. EIA-861 2025 final. Average revenue per kWh is all charges divided by kWh; it is not a tariff rate.

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Utility	average monthly residential use
United Illuminating (CT)	516
Eversource (CT)	677

3 counties have more than one distribution utility; New London County has 6⁷. EIA records service by county, not by street, so the utility's own map decides who serves an address.

Eversource only (of these)United Illuminating only (of these)Two or more of themOther utilities only

Source: EIA-861 2025, service territory; Census Bureau, Cartographic boundary file, counties. Counties where each utility reports serving customers (EIA-861 service territory, 2025). A utility often serves only part of a county, and several can share one: the map shows where each one is present, not street-level boundaries. Point at a county for every utility listed there.

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County	Utilities reporting service
Fairfield County	Eversource, United Illuminating, City of South Norwalk, Norwalk Third Taxing District
Hartford County	Eversource
Litchfield County	Eversource
Middlesex County	Eversource
New Haven County	Eversource, United Illuminating, Town of Wallingford
New London County	Eversource, City of Norwich, Groton Dept of Utilities, City of Jewett City, Bozrah Light & Power Company, Mohegan Tribal Utility Authority
Tolland County	Eversource
Windham County	Eversource

Why the bill ranks higher than the price

Connecticut's average residential bill was $206.46 a month in 2025, $55.78 more a month than the US average and the 2nd highest among the states, up 3.4% from $199.66⁹ in 2024. Homes used 704 kWh a month that year, against 874 kWh nationally, the 16th lowest² among the states. Low use pulls the bill down, but not far enough to offset a price this far above average. Over the last 12 months the computed average bill was $192.61, the 3rd highest¹.

Households say the same. In the Census Bureau's 2025 American Community Survey, 37.9% of Connecticut households paying for electricity reported a monthly bill of $250 or more (±0.7 percentage points), the 2nd highest share in the country and against 26.6% nationally; the median reported bill was about $203 (US $169). Those are survey estimates for one month, and the 3.2 percentage points¹⁰ change from the 2024 survey is a difference between two estimates, not tested for significance.

Under $50$50–99$100–149$150–199$200–249$250 or more

Connecticut

United States

Source: Census Bureau, American Community Survey 2025 1-year estimates, table B25132. Households charged for electricity, by the cost they reported for the previous month (American Community Survey 2025, 1-year). Interviews run all year, so this is a typical month, recalled by the household; households whose electricity is included in rent are left out.

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	Under $50	$50–99	$100–149	$150–199	$200–249	$250 or more
Connecticut	3.9%	13.9%	16.8%	14.5%	13.0%	37.9%
United States	5.2%	17.9%	20.7%	16.7%	13.0%	26.6%

Use per home peaks in summer. Over the last 12 months it ranged from 524 kWh in October 2025 to 918 kWh in July 2026, 1.8 times as much. Electricity is the main heating fuel in 20.1% of Connecticut homes (Census, 2025), against 41.8%¹¹ nationally, so winter bills rise less than in states with more electric heat. In August 2026, after the cuts, the average bill was $204.35 for 834 kWh, against a US average of $209.23¹.

Standard service, suppliers and delivery charges

Connecticut households can buy their electricity supply from a licensed supplier while their utility keeps delivering it; those who do not choose stay on the utility's standard service. In 2025, 16.3% of residential customers bought from a supplier (241,785 customers, the 9th highest share among the states; US: 15.1%). EIA counted 9 suppliers with residential customers. The share was 16.6% at Eversource and 17.1%⁶ at United Illuminating.

Each group paid a different average in 2025, for a different part of the bill:

• standard-service customers of the investor-owned utilities paid 28.97¢ per kWh for supply and delivery together;
• supplier customers paid their supplier 11.78¢ per kWh for supply only;
• the same customers paid their utility 18.96¢ per kWh⁶ for delivery only.

These figures describe different customers and different services, so they cannot be added or compared like for like. The supply-only figure is an average across every supplier contract in force during the year, not a price on offer today. By utility, delivery-only customers paid 18.65¢ per kWh at Eversource and 20.17¢ per kWh⁶ at United Illuminating. The Connecticut retail choice guide explains how to compare a supplier's offer with the standard service rate on your own bill.

Utility full-service customers (default service): supply and delivery28.97¢

Competitive suppliers and CCAs: supply only11.78¢

Utility delivery for customers of a supplier: delivery only18.96¢

Source: EIA-861 annual electric power industry report, 2025 final. Average revenue per kWh by service part, EIA-861 2025. Supply-only and delivery-only averages each cover only part of a bill and different groups of customers; adding them gives only a rough estimate of what a shopping customer paid in total.

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Part of the market	¢/kWh
Utility full-service customers (default service): supply and delivery	28.97¢
Competitive suppliers and CCAs: supply only	11.78¢
Utility delivery for customers of a supplier: delivery only	18.96¢

Gas, nuclear power and an export surplus

Power plants in Connecticut generated 43.8 terawatt-hours in 2025, the equivalent of 158% of the state's retail sales (tied for 8th highest among the states); the rest is sold onto the regional grid run by ISO New England. The largest source was natural gas (56.5%), followed by nuclear power (38.2%). Since 2015 the gas share has risen 10.2 percentage points and the nuclear share has fallen from 46.5% to 38.2%. Renewable sources produced 3.6%, tied for lowest among the states, against 24.1% nationally; solar reached 1.5% and in-state wind generation was 0.0%. Coal fell from 1.6% in 2015 to 0.0%¹².

Natural gasCoalNuclearHydroWindSolarPetroleumOther

Connecticut, 2025

Connecticut, 2015

United States, 2025

Source: EIA, Net generation by state by type of producer by energy source. Share of net generation by all power plants located in the state (utilities and independent producers), by energy source. Electricity crosses state lines, so this is what the state produces, not exactly what its customers consume. Pumped storage is a net user of power and is left out.

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	Natural gas	Coal	Nuclear	Hydro	Wind	Solar	Petroleum	Other
Connecticut, 2025	56.5%	0.0%	38.2%	0.7%	0.0%	1.5%	0.8%	2.4%
Connecticut, 2015	46.3%	1.6%	46.5%	0.8%	0.0%	0.0%	1.2%	3.6%
United States, 2025	40.9%	16.6%	17.7%	5.5%	10.4%	6.8%	0.4%	1.7%

Smart meters, rooftop solar, outages and help paying

The two utilities differ on metering. In 2025, 92.8% of United Illuminating's residential meters were advanced (smart) meters against 0.0% at Eversource, leaving the state at 22.3%, the 3rd lowest share in the country. Time-varying rates follow the meters: 22.6% of United Illuminating's residential customers were on one, against 0.1% at Eversource (4.5%¹³ statewide).

Rooftop solar is common. Utilities reported 119,508 net-metered residential installations in 2025, 75.6 per 1,000 residential customers, the 5th highest rate among the states (US: 38.1¹³). Electricity those panels produce and use on site does not appear in the use-per-home figures above.

Customers averaged 211 minutes without power in 2025 including major storms and 86 minutes excluding them, with 0.99 interruptions per customer. United Illuminating's customers averaged 73 minutes, Eversource's 217 minutes¹⁴.

Connecticut received $90.2 million from the federal Low Income Home Energy Assistance Program (LIHEAP) for fiscal 2026, $61.93 per occupied home, the 4th highest amount among the states; the first fiscal 2027 release was $75.3 million¹⁵. The help paying your electric bill guide covers LIHEAP and utility assistance programs.