United Illuminating Co Electricity Rates and Average Bill (Connecticut)
Data through August 2026 (the latest month EIA has published) · Updated October 31, 2026
As of August 2026, United Illuminating Co's residential customers in Connecticut paid an average effective rate of 28.27¢/kWh with an average monthly bill of $198.75, per EIA Form 861-M data. That rate is 3.8¢ above the Connecticut average of 24.51¢/kWh; the U.S. average is 18.16¢/kWh.
Rate trend vs the Connecticut average
View this chart as a table (last 12 months)
| Month | Rate (¢/kWh) | Avg bill ($/mo) | Avg usage (kWh/mo) |
|---|---|---|---|
| September 2025 | 33.07 | 144.66 | 437 |
| October 2025 | 32.73 | 125.60 | 384 |
| November 2025 | 32.80 | 168.69 | 514 |
| December 2025 | 32.76 | 208.45 | 636 |
| January 2026 | 34.19 | 226.60 | 663 |
| February 2026 | 34.45 | 202.89 | 589 |
| March 2026 | 36.49 | 172.50 | 473 |
| April 2026 | 37.18 | 138.67 | 373 |
| May 2026 | 32.80 | 125.83 | 384 |
| June 2026 | 31.21 | 170.28 | 546 |
| July 2026 | 28.27 | 204.87 | 725 |
| August 2026 | 28.27 | 198.75 | 703 |
United Illuminating Co vs Connecticut vs the U.S.
| United Illuminating Co | Connecticut | U.S. average | |
|---|---|---|---|
| Rate (August 2026) | 28.27¢/kWh | 24.51¢/kWh | 18.16¢/kWh |
| Average monthly bill | $198.75 | $204.35 | $209.23 |
| Average monthly usage | 703 kWh | 834 kWh | 1152 kWh |
| Rate change, 1 year | −21.4% | −18.8% | +3.4% |
Estimate a bill at United Illuminating Co rates
Worked example: 1,000 kWh at United Illuminating Co's average effective rate of 28.27¢/kWh is about $282.70. The utility's actual average usage is 703 kWh/month, which produces the $198.75 average bill. This is an all-in average (energy, delivery, fixed charges, riders); your tariff's marginal price will differ.
See the full Connecticut rate trend, look up another utility by ZIP code, or read why electric bills are rising.
Source: EIA Form 861-M (monthly utility-level sales to ultimate customers, residential), published with roughly a two-month lag. Rate = revenue ÷ sales; bill = revenue ÷ customers. Months failing basic sanity screens are excluded. See methodology.