United Illuminating Co electricity rates
United Illuminating Co charges an average of 34.04 cents per kilowatt-hour to residential customers, and the average household on its system paid $185 a month using 543 kilowatt-hours, according to its 2024 filing with the U.S. Energy Information Administration.
Investor-owned utility ISNE Connecticut
Where United Illuminating Co sits
It serves 256,302 residential customers, making it one of the larger utilities in Connecticut. At 34.04¢ per kilowatt-hour it is among the more expensive utilities in Connecticut, 24.4% above the statewide average of 27.37¢.
Its customers use very little electricity by national standards, 543 kilowatt-hours a month against 871 nationally. Dense housing, a mild climate or heating that runs on gas rather than electricity all push consumption down, and any of them can leave a household with a modest bill despite a high rate.
A shareholder-owned company whose rates are set by the state regulator, including an approved return on the capital it has invested. That matters because a bill is not only the cost of generating electricity: it also carries the cost of the network, and who owns that network changes how it is paid for.
| Rate | Monthly bill | Monthly kWh | |
|---|---|---|---|
| United Illuminating Co | 34.04¢ | $185 | 543 |
| Connecticut average | 27.37¢ | $203 | 709 |
| United States average | 18.44¢ | $155 | 871 |
Utility figures: U.S. Energy Information Administration, Form EIA-861 annual electric power industry report, 2024. State and national figures: Electric Power Monthly, May 2026. Methodology
Where United Illuminating Co delivers
Its service territory covers 2 Connecticut counties, either wholly or in part. Utility boundaries follow historic franchise agreements rather than county lines, so a county appearing here does not mean every address in it is served by United Illuminating Co.
- Fairfield
- New Haven
How often the power goes out
In 2024 the average United Illuminating Co customer went 122 minutes without electricity across 0.79 interruptions. The median across the 941 utilities that report this is 185 minutes.
That is better than the typical American utility, though the figure includes major storm days and can move sharply from one year to the next.
Optional rate plans
United Illuminating Co offers time-of-use pricing to residential customers. 71,280 households were enrolled, about 27.8% of its residential base.
These plans are opt-in almost everywhere. They reward households that can move laundry, dishwashing, water heating or electric vehicle charging out of the late-afternoon peak, and they cost more than the standard rate for households that cannot. How to tell which group you are in.
Rooftop solar on this system
23,614 residential customers had net-metered solar in 2024, totalling 144.68 megawatts. That works out to 92.1 installations per thousand customers, against a median of 8 across the utilities reporting it.
Adoption here is exceptionally high. That usually means some combination of a high retail rate worth displacing, strong sunshine and favourable export rules, and it tends to bring its own regulatory argument about who covers the fixed cost of the network. What exports are actually worth.
Other Connecticut utilities
| Utility | Rate | Bill | Customers |
|---|---|---|---|
| Connecticut Light & Power Co | 28.51¢ | $187 | 924,132 |
| Town of Wallingford | 15.65¢ | $130 | 21,405 |
| Sunnova | 21.24¢ | $149 | 20,437 |
| City of Norwich | 22.78¢ | $140 | 18,870 |
| Sunrun Inc. | 24.36¢ | $155 | 17,293 |
United Illuminating Co rates: common questions
How much does United Illuminating Co charge per kilowatt-hour?
An average of 34.04 cents per kilowatt-hour across its residential customers in 2024. That is +24.4% against the Connecticut average of 27.37¢ and +84.6% against the national average of 18.44¢. It is an all-in average across every residential rate schedule the utility offers, not a specific tariff.
What is the average United Illuminating Co bill?
$185 a month, based on total residential revenue divided by residential customers over the 2024 survey year, at an average of 543 kWh a month. The national average bill is $155 at 871 kWh.
Who owns United Illuminating Co?
It is classified by the EIA as a investor-owned utility. A shareholder-owned company whose rates are set by the state regulator, including an approved return on the capital it has invested.
Is United Illuminating Co expensive compared with other Connecticut utilities?
It ranks #1 of the 11 Connecticut utilities covered here, counting from the most expensive. Nationally it ranks #16 of 1369.