State electricity profile · EIA monthly through May 2026
Connecticut Electricity
As of May 2026, residential electricity in Connecticut costs 27.37¢ per kWh (-13.4% vs May 2025). EIA publishes these figures monthly and this page follows them. Connecticut's 2025 annual residential electricity rate is 29.38¢/kWh, 69.8% above the US average. Both figures point the same way: an above-average rate and only 7% of generation from renewables. The fuel-by-fuel and sector detail is below.
- 27.37¢
- May 2026 rate
- -13.4%
- year over year
- 29.38¢/kWh
- Residential rate
- +69.8%
- vs US average
- 7%
- Renewable
- 1.6M
- Customers
Verify with EIA → · Methodology
29.38¢/kWh residential, 23.11¢/kWh commercial
In the U.S. Energy Information Administration's 2025 annual-frequency retail-sales series, Connecticut's residential average revenue per kWh is 29.38¢/kWh, with a commercial average of 23.11¢/kWh and an industrial average of 18.35¢/kWh; a separate EIA generation series for 2025 reports 7% of the state's generation from renewables.
- 69.8% above the US average vs national residential average
- 7% renewable generation
The verdict · 2025
Connecticut's residential electricity runs 29.38¢/kWh - 69.8% above the 17.30¢/kWh national average, pricier than 92% of other states, with 7% of its power from renewables.
This is EIA state average revenue per kWh across 1.6M reported residential customers, a benchmark for comparing states, not the tariff on any single bill. Source: EIA retail-sales API, annual frequency.
Annual rate change
What changed in the 2025 annual EIA period
- Connecticut's commercial average rose from 21.21¢/kWh to 23.11¢/kWh between the 2024 and 2025 annual-frequency EIA retail-sales periods, a change of +9.0%.
- Connecticut's industrial average rose from 17.12¢/kWh to 18.35¢/kWh between the 2024 and 2025 annual-frequency EIA retail-sales periods, a change of +7.2%.
- Connecticut's residential average rose from 28.75¢/kWh to 29.38¢/kWh between the 2024 and 2025 annual-frequency EIA retail-sales periods, a change of +2.2%.
Where Connecticut's residential rate sits nationally
2025 average revenue per kWh across every reporting state
29.38¢/kWh 8th affordability percentile More affordable than 8% of 50 other states
all reporting states, equal-width bands
Each bar spans 5¢/kWh. Taller bars contain more states; the dashed marker locates this state. Hover, focus or tap a bar for its exact count and share.
Source U.S. Energy Information Administration, retail-sales API · 2025 annual frequency
How Connecticut compares
Average revenue per kWh, EIA retail-sales API. Pick a benchmark above to compare Connecticut against the US average or a peer state.
What Connecticut's Electricity Data Tells Us
Residential customers in Connecticut pay 29.38¢/kWh in 2025, across 1.6M metered households, placing the state 69.8% above the national residential average of 17.30¢/kWh. Commercial rates sit at 23.11¢/kWh while industrial buyers pay 18.35¢/kWh. These sector averages describe recorded revenue per kWh; this dataset alone does not establish why they differ. Annual residential sales total 13.4M MWh on roughly $3.9B in utility revenue. Sales and revenue are reported retail-series measures and should not be treated as a local load forecast.
Connecticut prices its sectors in step: 5 of 51 residential against 6 industrial. A state this consistent is the exception rather than the rule, and it means the residential figure above is a fair proxy for how the whole grid is priced. Natural gas carries the majority of Connecticut's in-state generation at 54.3%, though not the whole grid: nuclear supplies 37.1% and solar a further 5.6%. It is the leading fuel in 26 states. Renewable fuels (solar, wind, hydro, geothermal and biomass) account for 7.1% of Connecticut's electricity output. These shares describe in-state generation, not a utility-specific customer bill.
Looking back across EIA records, residential prices in Connecticut moved from 20.01¢/kWh in 2016 to 29.38¢/kWh in 2025, a 46.8% shift over that window. States charging a similar rate include Rhode Island, Massachusetts, Maine, a useful peer set for a sanity check. Because gas sets the price of the marginal megawatt-hour on a grid built around it, Connecticut's residential rate tracks the fuel market with a lag: a gas-price winter shows up on bills months later, and a cheap gas year works its way through the same way. At this level it matters what the figure is made of: it is total revenue divided by total kilowatt-hours, so delivery, taxes and fees are inside it but never broken out. In a state as dear as Connecticut that hides which part of the bill a household could actually act on.
+69.8%
Much more expensive vs the US residential average
8%
of states have higher rates — Among the costliest
7%
Low renewable share — below the 25% US mix
1.6M
residential customers served
Market Overview
Residential Revenue
$3.9B
Commercial Revenue
$2.7B
Residential Sales
13.4M MWh
Residential Customers
1.6M
Residential Price History
Connecticut residential average revenue per kWh moved from 20.01¢/kWh in 2016 to 29.38¢/kWh in 2025 (46.8% over the window).
- Connecticut residential avg
- 29.38¢/kWh 46.8% since 2016
- 2016 → 2025
- Connecticut residential: 2016, 20¢
- Connecticut residential: 2017, 20.3¢
- Connecticut residential: 2018, 21.2¢
- Connecticut residential: 2019, 21.9¢
- Connecticut residential: 2020, 22.7¢
- Connecticut residential: 2021, 21.9¢
- Connecticut residential: 2022, 24.6¢
- Connecticut residential: 2023, 29.9¢
- Connecticut residential: 2024, 28.8¢
- Connecticut residential: 2025, 29.4¢
Source: U.S. Energy Information Administration, retail-sales API · annual frequency. Connecticut full trend →
Connecticut Average Price by Sector and Year (¢/kWh)
The chart above tracks households only. In 2025, Connecticut households paid 29.38¢/kWh while businesses paid 23.11¢/kWh, a 27.1% residential premium, a wider household-versus-business gap than most states. Every year EIA has published is below, so a single year can be read across all three sectors rather than assembled from three separate EIA queries.
| Year | Residential | Commercial | Industrial |
|---|---|---|---|
| 2025 | 29.38¢/kWh | 23.11¢/kWh | 18.35¢/kWh |
| 2024 | 28.75¢/kWh | 21.21¢/kWh | 17.12¢/kWh |
| 2023 | 29.88¢/kWh | 19.99¢/kWh | 15.69¢/kWh |
| 2022 | 24.61¢/kWh | 18.54¢/kWh | 15.07¢/kWh |
| 2021 | 21.91¢/kWh | 16.46¢/kWh | 9.63¢/kWh |
| 2020 | 22.71¢/kWh | 16.58¢/kWh | 13.07¢/kWh |
| 2019 | 21.87¢/kWh | 16.75¢/kWh | 13.44¢/kWh |
| 2018 | 21.20¢/kWh | 16.76¢/kWh | 13.77¢/kWh |
| 2017 | 20.29¢/kWh | 16.06¢/kWh | 13.10¢/kWh |
| 2016 | 20.01¢/kWh | 15.75¢/kWh | 12.81¢/kWh |
Average revenue per kilowatt-hour, U.S. Energy Information Administration annual-frequency retail-sales series. Revenue per kWh is what customers in each sector actually paid on average, not an advertised tariff rate. Years with no EIA figure for a sector show —.
Who generates Connecticut's electricity
Connecticut has 300 operable generating units on EIA's inventory totalling 9,323 MW of net summer capacity. The largest single plant is Millstone , a nuclear station operated by Dominion Energy Nuclear Conn Inc , rated 2,108 MW.
The grid here is run by ISO New England Inc, the balancing authority that keeps supply and demand matched across the state.
Showing the 16 largest of 180 operable plants in Connecticut by net summer capacity.
| Plant | Operator | Technology | County | MW |
|---|---|---|---|---|
| Millstone | Dominion Energy Nuclear Conn Inc | Nuclear | – | 2,108 |
| Lake Road Generating Plant | Lake Road Generating Co LP | Natural Gas Fired Combined Cycle | – | 829 |
| CPV Towantic Energy Center | CPV Towantic, LLC | Natural Gas Fired Combined Cycle | – | 744 |
| Kleen Energy Systems | Kleen Energy Systems, LLC | Natural Gas Fired Combined Cycle | – | 622 |
| New Haven Steam | Generation Bridge II Connecticut, LLC | Petroleum Liquids | – | 562 |
| Bridgeport Energy Project | Bridgeport Energy LLC | Natural Gas Fired Combined Cycle | – | 538 |
| Milford Power Project | Milford Power Co LLC | Natural Gas Fired Combined Cycle | – | 510 |
| Bridgeport Station | Generation Bridge II Connecticut, LLC | Natural Gas Fired Combined Cycle | – | 496 |
| Montville Station | Montville Power LLC | Petroleum Liquids | – | 491 |
| Wallingford Energy | Wallingford Energy LLC | Natural Gas Fired Combustion Turbine | – | 318 |
| GenConn Devon LLC | GenConn Devon LLC | Petroleum Liquids | – | 196 |
| GenConn Middletown LLC | GenConn Middletown LLC | Petroleum Liquids | – | 188 |
| Devon Station | Devon Power LLC | Petroleum Liquids | – | 132 |
| Gravel Pit Solar, LLC | Gravel Pit Solar, LLC | Solar Photovoltaic | – | 120 |
| Waterbury Generation | Engie North America | Natural Gas Fired Combustion Turbine | – | 96 |
| Cos Cob | Connecticut Jet Power LLC | Petroleum Liquids | – | 96 |
| Operating company | Plants | Net summer MW |
|---|---|---|
| Dominion Energy Nuclear Conn Inc | 1 | 2,108 |
| Generation Bridge II Connecticut, LLC | 2 | 1,058 |
| Lake Road Generating Co LP | 1 | 829 |
| CPV Towantic, LLC | 1 | 744 |
| Kleen Energy Systems, LLC | 1 | 622 |
| Bridgeport Energy LLC | 1 | 538 |
| Milford Power Co LLC | 1 | 510 |
| Montville Power LLC | 1 | 491 |
| Wallingford Energy LLC | 1 | 318 |
| GenConn Devon LLC | 1 | 196 |
Operable units only, from EIA's generator inventory as reported for 2026-05. Capacity is net summer rating, which is what a unit can reliably deliver in peak conditions rather than its nameplate figure. Ownership and operatorship can differ; the company shown is the one EIA records as operating the unit.
Energy Generation Mix (2025)
How Connecticut generates its electricity, from the EIA generation series for 2025 (separate from the 2025 retail-sales price figures above). Renewable sources account for 7.1% of generation.
- Natural Gas54.3%
- Nuclear37.1%
- Solarrenewable5.6%
- Other1.0%
- Biomassrenewable0.8%
- Hydrorenewable0.8%
- Petroleum0.5%
Frequently Asked Questions
How much does electricity cost in Connecticut? ▼
Where does Connecticut's residential electricity rate rank nationally? ▼
How much of Connecticut's electricity is renewable? ▼
Are electricity prices going up in Connecticut? ▼
What are commercial and industrial electricity rates in Connecticut? ▼
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States with Similar Electricity Prices
Other states led by natural gas
These grids also report natural gas as their largest generation share in the latest EIA mix — a different peer set from the price neighbors above.
Using Connecticut's numbers
With renewables still a small share of generation here, the figures above describe a mix that has further to travel than most. Watch what Connecticut builds when its existing thermal capacity retires, because that is the decision the next decade of rates is made of.
- Connecticut sits 69.8% above the national average, see exactly where it lands among all 50 states. See the rankings
- Check the multi-year trend before you judge the rate, a low price rising fast can cost more over a decade than a steady one. Connecticut price trend
- Compare Connecticut side by side with the US average and peer states using the tool above, then estimate your own bill from your monthly kWh. Cost calculator
Figures are EIA state averages by sector, computed as revenue divided by sales, so delivery and taxes are inside them but not broken out. Your actual rate depends on your utility, plan, and usage, see our disclaimer.
Read with Connecticut: why energy prices vary
Where Connecticut's figures come from
Every price and generation figure on this page is drawn from the EIA series below, and from nothing else.
- 📊 EIA State Energy Profile, Connecticut State energy database
- ⚡ EIA Electric Power Monthly The monthly and annual price series behind every rate here
- 🌿 EIA generation by source The in-state generation shares quoted above
- 📖 Our methodology Source-to-figure lineage, and further federal energy references
Utilities serving Connecticut
The 13 utilities that reported bundled residential service in Connecticut to EIA Form 861 (2024), largest first. Entity prices below are Form 861 averages for that release, not the same survey as the 2025 retail-sales statewide average above, and not a household tariff. What an individual household pays depends on which of these serves its address.
| Utility | Ownership | Customers | Avg ¢/kWh |
|---|---|---|---|
| Connecticut Light & Power Co | Investor Owned | 924.1K | 28.51¢ |
| United Illuminating Co | Investor Owned | 256.3K | 34.04¢ |
| Town of Wallingford - (CT) | Municipal | 21.4K | 15.65¢ |
| Sunnova | Behind the Meter | 20.4K | 21.24¢ |
| City of Norwich - (CT) | Municipal | 18.9K | 22.78¢ |
| Sunrun Inc. | Behind the Meter | 17.3K | 24.36¢ |
| Groton Dept of Utilities - (CT) | Municipal | 12.3K | 18.70¢ |
| Tesla Inc. | Behind the Meter | 8.4K | 17.11¢ |
| SunPower Capital, LLC | Behind the Meter | 3.5K | 18.03¢ |
| Bozrah Light & Power Company | Municipal | 2.4K | 19.33¢ |
| Spruce Finance | Behind the Meter | 1.8K | 16.33¢ |
| EverBright, LLC | Behind the Meter | 489 | 17.81¢ |
| Palmetto Solar, LLC | Behind the Meter | 46 | 28.09¢ |
The 2 serving 100.0K+ residential customers link to a full profile. Presence in EIA Form 861 is not evidence that a utility is available at a given address or that a customer may choose it.
Related
Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the U.S. Energy Information Administration (EIA). Consult a qualified professional before making decisions based on this data.
Every figure on RateWatt is rendered directly from official U.S. Energy Information Administration (EIA) data, no number is typed in by an editor. Statewide prices use the EIA retail-sales annual series (2025). Generation mix uses a separate EIA generation series (2025). Utility rows use Form EIA-861 (2024) and are not averaged into the statewide retail-sales figure. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2025.