Full service
35.40¢
per kWh, 2025 average revenue
$182.78 / month at 516 kWh
Price +4.0% from 2024
Investor Owned · 314,909 residential customers · Connecticut
Why is my United Illuminating electric bill so high?
EIA respondent: United Illuminating Co. Reviewed October 14, 2026.
United Illuminating did not have one residential price in 2025. EIA keeps the service types separate. 261,151 full service customers averaged 35.40¢ per kWh and $182.78 a month; 53,758 delivery only customers averaged 20.17¢ per kWh and $164.07 a month. A blended average would describe neither bill. The legal name in the filing is United Illuminating Co.
Connecticut's 2025 statewide residential average was 29.31¢. July 2026 was 24.16¢, versus 27.60¢ in July 2025 (−12.5%). Compare each United Illuminating service type with those figures on its own.
From 2024 to 2025, the average monthly bill for full service changed −1.0%. Average use changed −4.8% and average price changed +4.0%. Holding the 2024 price fixed, the usage change accounts for −$8.93 a month. The price change, applied to 2025 usage, accounts for $7.04.
EIA Form 861, 2025 final · Reviewed October 14, 2026
EIA Electric Power Monthly, Table 5.6.A · Reviewed October 14, 2026
Delivery only
20.17¢
per kWh, 2025 average revenue
$164.07 / month at 814 kWh
Price +3.0% from 2024
The rate on the record
Investor-owned base rates are usually set in a state docket. Riders can change outside a full rate case. Average revenue per kilowatt-hour is total residential revenue divided by residential sales. It is not a tariff schedule.
| Service | Customers | Price | Monthly use | Monthly bill | Vs 2024 price |
|---|---|---|---|---|---|
| Full service | 261,151 | 35.40¢ | 516 kWh | $182.78 | +4.0% |
| Delivery only | 53,758 | 20.17¢ | 814 kWh | $164.07 | +3.0% |
EIA-861 sales to ultimate customers, 2025 final, compared with 2024 · Reviewed October 14, 2026
By state
| State | Service | Customers | Price | Monthly bill |
|---|---|---|---|---|
| CT | Full service | 261,151 | 35.40¢ | $182.78 |
| CT | Delivery only | 53,758 | 20.17¢ | $164.07 |
Audit the full service average
Revenue 572,784.1 thousand dollars. Sales 1,617,881 MWh. Customers 261,151. Cents per kWh = revenue ÷ megawatt-hours × 100. Monthly bill = revenue × 1,000 ÷ customers ÷ 12.
Audit the delivery only average
Revenue 105,840.5 thousand dollars. Sales 524,797 MWh. Customers 53,758. Cents per kWh = revenue ÷ megawatt-hours × 100. Monthly bill = revenue × 1,000 ÷ customers ÷ 12.
Why the bill spikes
Season
The 2025 monthly average in Connecticut was 704 kWh. A hot or cold month can sit far from that. Compare kilowatt-hours with the same month last year before you blame the rate.
EIA-861 average bill file, 2025 · Reviewed October 14, 2026
A rate change
The full service average moved +4.0% from 2024. That is not the same thing as a new commission order. Connecticut Public Utilities Regulatory Authority is the public docket desk.
Connecticut Public Utilities Regulatory Authority · Reviewed October 14, 2026
Fuel and rider charges
Retail prices bundle generation, delivery, and other costs. A fuel adjustment or rider can move the total without a new base-rate case. The rider names on a United Illuminating bill need verification.
EIA, prices and factors affecting electricity prices · Reviewed October 14, 2026
Time of use
EIA's 2025 dynamic-pricing schedule shows residential time-of-use activity, with 71,060 residential customers enrolled in dynamic pricing programs.
EIA-861 dynamic pricing, 2025 · Reviewed October 14, 2026
Estimated reads
Needs verification If the statement says the read is estimated, the next actual read can true the account up or down. The rule is in the utility's tariff, which is not stored here.
Data-center load
National demand is rising, and EIA points to large computing facilities. There is no published dollar line that isolates data centers on a United Illuminating residential bill. Needs verification
EIA press release, January 13, 2026 · Reviewed October 14, 2026
Rate cases and hikes
Needs verification No rate case for United Illuminating has been reviewed for this page. Orders and pending dockets are public at Connecticut Public Utilities Regulatory Authority. Investor-owned base rates are usually set in a public docket. Municipal and cooperative rates may be set by a city or a co-op board instead. Which body sets this utility's rates needs verification.
Connecticut Public Utilities Regulatory Authority · Reviewed October 14, 2026
Assistance
LIHEAP helps with home energy bills. Start with the federal program page and the state contact list. A United Illuminating discount, budget-billing plan, or medical baseline needs verification.
LIHEAP · Reviewed October 14, 2026
How to lower the bill
- Read kilowatt-hours first. If use is up, the dollar total can rise on an unchanged rate.
- Check whether the read is actual or estimated. The true-up rule needs verification in the tariff.
- Add the supply charge and the delivery charge before comparing plans. This page keeps those EIA rows apart.
- Ask about budget billing and an income-qualified discount. Eligibility needs verification.
- If you are on time-of-use, move flexible load out of the expensive window. Confirm the window on the tariff.
Full service at the 2025 average price
| Monthly use | Estimated bill |
|---|---|
| 500 kWh | $177.00 |
| 750 kWh | $265.50 |
| 1,000 kWh | $354.00 |
| 1,500 kWh | $531.00 |
| 2,000 kWh | $708.00 |
Usage times the average price. At very low use, a real bill is often higher because a fixed customer charge does not shrink. The tariff needs verification.
Delivery only at the 2025 average price
| Monthly use | Estimated bill |
|---|---|
| 500 kWh | $100.85 |
| 750 kWh | $151.28 |
| 1,000 kWh | $201.70 |
| 1,500 kWh | $302.55 |
| 2,000 kWh | $403.40 |
Usage times the average price. At very low use, a real bill is often higher because a fixed customer charge does not shrink. The tariff needs verification.
Questions people ask
Why is my United Illuminating electric bill so high?
United Illuminating did not have one residential price in 2025. EIA keeps the service types separate. 261,151 full service customers averaged 35.40¢ per kWh and $182.78 a month; 53,758 delivery only customers averaged 20.17¢ per kWh and $164.07 a month. A blended average would describe neither bill. The legal name in the filing is United Illuminating Co. Connecticut's 2025 statewide residential average was 29.31¢. July 2026 was 24.16¢, versus 27.60¢ in July 2025 (−12.5%). Compare each United Illuminating service type with those figures on its own. From 2024 to 2025, the average monthly bill for full service changed −1.0%. Average use changed −4.8% and average price changed +4.0%. Holding the 2024 price fixed, the usage change accounts for −$8.93 a month. The price change, applied to 2025 usage, accounts for $7.04.
What was United Illuminating's average residential rate?
Using 2025 EIA-861 revenue and sales, the full service average was 35.40¢ per kWh. Average use was 516 kWh a month and the average bill was $182.78. This folds in whatever customer charges and riders the utility reported. It is not the marginal rate on your tariff.
Did United Illuminating raise rates?
The full service average price changed +4.0% from 2024 to 2025, from 34.04¢ to 35.40¢. That is average revenue per kilowatt-hour, not a commission order. No 2025–2026 order for this utility was retrieved for this page. A separate rider can still move a single month.
What bill assistance can United Illuminating customers ask about?
LIHEAP is the federal program for home energy bills (https://www.acf.hhs.gov/ocs/programs/liheap). United Illuminating may also offer an income-qualified discount, budget billing, or a medical baseline. The current offer, income cutoff, and how to apply need verification with the state LIHEAP office and Connecticut Public Utilities Regulatory Authority.
Are data centers why this bill went up?
Large computing load is raising U.S. electricity demand, and regulators can later recover new generation and wires costs from customers. EIA has not published a dollar line that isolates data centers on this utility's residential bill. That pass-through needs verification.