How CT electric rates are set
A Connecticut bill has a supply (generation) part and a delivery part. Connecticut Light & Power (Eversource) and United Illuminating deliver power to almost every home; EIA's utility survey reports them separately as full-service providers for homes on the utility's standard service and as delivery-only providers for homes that buy supply from a third-party supplier.[eia861]
- Standard service is the utility's default supply; its generation rate is printed on the bill.
- Supplier offers replace only the generation rate, so compare them with the standard service generation rate; delivery charges are the same either way.
- Municipal utilities, such as the Town of Wallingford's, serve their own towns and appear separately in the utility table.
Electric rates in CT: Eversource vs UI
In 2024 Eversource's (CL&P's) full-service residential customers paid 28.51¢ per kWh all-in and UI's paid 34.04¢. For homes buying from a supplier, the delivery part alone averaged 16.26¢ at Eversource and 19.59¢ at UI.[eia861] For shoppers, delivery was 57% of the all-in price, which is why even a cheap supplier price leaves the all-in rate well above the U.S. average.
| Utility | Service | Customers | ¢/kWh | kWh/mo | Bill/mo |
|---|---|---|---|---|---|
| Connecticut Light & Power Co | Full service | 924,132 | 28.51¢ | 656 | $187.10 |
| United Illuminating Co | Full service | 256,302 | 34.04¢ | 543 | $184.69 |
| Connecticut Light & Power Co | Delivery only | 250,288 | 16.26¢ | 857 | $139.43 |
| United Illuminating Co | Delivery only | 55,989 | 19.59¢ | 644 | $126.17 |
| Town of Wallingford | Full service | 21,405 | 15.65¢ | 828 | $129.64 |
| City of Norwich | Full service | 18,870 | 22.78¢ | 616 | $140.25 |
| Groton Dept of Utilities | Full service | 12,284 | 18.70¢ | 715 | $133.68 |
| Bozrah Light & Power Company | Full service | 2,434 | 19.33¢ | 832 | $160.78 |
Compare electric rates in CT: what shoppers paid
306,277 Connecticut homes (19.7%) bought supply from a third-party supplier in 2024. Their supply averaged 12.62¢ per kWh and their delivery about 16.74¢, roughly 29.36¢ all-in, against 29.54¢ for standard service customers of Eversource and UI.[eia861] In other words, the two groups paid almost the same on average. Whether a given offer saves money depends on the standard service generation rate in force for the same months.
| Provider type | Customers | ¢/kWh | kWh/mo | Bill/mo |
|---|---|---|---|---|
| Utility full service (default supply) | 1,180,434 | 29.54¢ | 632 | $186.58 |
| Utility delivery for shopping customers | 306,277 | 16.74¢ | 818 | $137.01 |
| Competitive suppliers, supply only (all combined) | 293,596 | 12.62¢ | 812 | $102.45 |
| Municipal utilities | 54,993 | 18.57¢ | 730 | $135.56 |
| Rooftop solar third-party owners | 52,069 | 21.28¢ | 655 | $139.36 |
Electric power rates in CT by month
Connecticut's 12-month average fell from 30.11¢ in Sep 2024–Aug 2025 to 27.42¢ in Sep 2025–Aug 2026, −8.9%.[eia861m]
Connecticut U.S. average
| Month | ¢/kWh | Year earlier | Change | kWh/home | Avg bill |
|---|---|---|---|---|---|
| August 2026 | 24.51¢ | 30.17¢ | −18.8% | 834 | $204.35 |
| July 2026 | 24.16¢ | 27.54¢ | −12.3% | 918 | $221.84 |
| June 2026 | 24.32¢ | 27.12¢ | −10.3% | 716 | $174.25 |
| May 2026 | 27.37¢ | 31.52¢ | −13.2% | 534 | $146.04 |
| April 2026 | 32.24¢ | 32.17¢ | +0.2% | 535 | $172.59 |
| March 2026 | 30.45¢ | 32.43¢ | −6.1% | 664 | $202.05 |
| February 2026 | 30.77¢ | 33.12¢ | −7.1% | 790 | $243.01 |
| January 2026 | 28.30¢ | 29.94¢ | −5.5% | 867 | $245.30 |
| December 2025 | 25.24¢ | 28.12¢ | −10.2% | 861 | $217.45 |
| November 2025 | 26.97¢ | 29.15¢ | −7.5% | 615 | $165.88 |
| October 2025 | 27.66¢ | 30.00¢ | −7.8% | 524 | $145.06 |
| September 2025 | 30.41¢ | 33.04¢ | −8.0% | 570 | $173.23 |
Connecticut ranks 7 of 51 for residential price (1 = most expensive). See NJ electric rates and the full electricity rates by state table. Many Connecticut homes heat with oil; this week's prices are on heating oil prices, and the switch math is on heat pump vs furnace cost.
Frequently asked questions
What is the average electric rate in CT?
27.42¢ per kWh for homes over Sep 2025–Aug 2026, and 24.51¢ in August 2026 (EIA).
What is the average electric bill in CT?
$192.61 a month over Sep 2025–Aug 2026, for 703 kWh (EIA).
Is it cheaper to use a supplier in Connecticut?
On average in 2024 supplier customers paid about 29.36¢ all-in vs 29.54¢ on standard service (EIA-861). Compare each offer with the current standard service rate.
What were CT electric supplier rates?
Third-party suppliers' supply price averaged 12.62¢ per kWh for Connecticut homes in 2024 (EIA-861), before delivery of about 16.74¢. Compare an offer with the standard service generation rate on your bill.
Why are CT electric rates so high?
Delivery charges are high: in 2024 delivery alone averaged 16.26¢ per kWh at Eversource for homes that bought supply elsewhere, 90% of the entire U.S. average price.