Electric companies in Connecticut
| Company | Homes served | Avg. bill / month | Avg. rate | Bill covers |
|---|---|---|---|---|
| Eversource | 1,174,420 | $187 | 28.5¢ | Default service |
| United Illuminating (UI) | 312,291 | $185 | 34.0¢ | Default service |
You can choose your electricity supplier in Connecticut
Your local utility still delivers the power and fixes the lines, but you can buy the electricity itself from a competing supplier. Where a bill above says “default service”, it covers households that stayed on the utility’s own supply.
How we calculated this
Figures come from the U.S. Energy Information Administration, Form EIA-861 (2024 data), for companies with 50,000 or more residential customers. The average bill is residential revenue divided by customers and 12 months; the rate is revenue divided by kilowatt-hours sold. Your own bill depends on your usage, plan and season. More sections for Connecticut (rent, gas and more) are added as each data set goes live.
Source: U.S. EIA, Form EIA-861. Last verified November 2026.