United Illuminating (UI) Rates, Bills and Service Area Guide

United Illuminating (UI) reported 261,151 residential customers on bundled service in 2025, using 516 kWh a month on average at 35.40 cents per kWh. Bundled means the utility supplies the energy and delivers it, so the price covers both. Among the 5 Connecticut utilities with at least 10,000 bundled residential customers, UI ranks 5 from the lowest price.

Another 53,758 residential customers use UI for delivery only and buy their energy from a different supplier. EIA reports their delivery revenue at about 20.17 cents per kWh, or $164.07 a month, which does not include the supply price.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), sales to ultimate customers. Price is revenue divided by sales and includes fixed charges.

EIA lists the counties where UI has distribution equipment. That covers 2 counties in Connecticut. A county can be served by more than one utility, so confirm your address with the utility or your bill.

Not sure who serves your address? Use find my electric company.

For 2025, UI reported an average of 39 minutes without power per customer and 0.51 interruptions per customer, with major event days left out. The typical interruption lasted about 77 minutes. For comparison, the median state averaged 127 minutes of outage per customer.

UI had about 88 fewer minutes of outage per customer than the median state. The Connecticut figure across its utilities was 87 minutes. One interruption lasting 77 minutes and 0.51 interruptions a year per customer add up to the 39 minute total.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), reliability schedule, measured under IEEE 1366. Utilities define events slightly differently, so compare with care.

• Time-of-use pricing. UI reports a residential time-of-use pricing program in its 2025 EIA filing, with about 71,060 residential customers enrolled in dynamic pricing programs of all kinds. Ask the utility which rate schedules you qualify for. How time-of-use rates work.
• Rooftop solar and net metering. EIA shows 27,647 residential net-metered systems on the UI grid in 2025, with 153.9 megawatts of capacity. How net metering works.

A private company owned by shareholders. A state commission reviews its costs and sets or approves its rates in formal rate cases. In Connecticut, that review is done by the Connecticut Public Utilities Regulatory Authority.

UI is an investor-owned utility based in Connecticut.

UI operates in the ISONE power market. Power markets set wholesale costs, but your retail rate is set by the rules described above.

By residential customers, UI ranks 2nd of the 6 utilities that report homes in Connecticut, with about 19.9% of the state's homes. Connecticut has too few other investor-owned utilities with reported prices to compare UI with its type, so the state average of 29.31 cents per kWh is the fairest yardstick. Over a year, the typical UI bill runs about $284 below the state average, with monthly use 188 kWh lower. UI lists distribution equipment in 2 counties, so check your county and your bill before you assume it serves you. 27,647 of its residential customers use net metering, or 87.8 per 1,000 homes, against 77.3 for Connecticut as a whole.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Peers are other utilities of the same type in Connecticut with at least 1,000 residential customers and a reported price.

See every one on the electric companies in Connecticut page.

Kilowatt Atlas is not UI and does not take payments, start service or manage accounts. To pay a bill, report an outage or start service, use the website, app or phone number printed on your bill. Be careful with search ads and lookalike sites that offer to pay your bill for a fee.

• Want to understand a line on your bill? Read how to read your electric bill.
• Think your bill is high? Try the bill checker.
• Connecticut allows retail choice in part or all of the state. See the provider guide.