United Illuminating Co: average rate and electric bill (2025)
United Illuminating Co (investor-owned utility, Connecticut) served 261,151 homes in 2025. The average customer used 516 kWh a month and paid $183, an average price of 35.4¢ per kWh including fixed charges, riders and taxes. That is 21% above the Connecticut average of 29.3¢.
What a bill costs at United Illuminating Co's average price
| Monthly usage | Estimated bill |
|---|---|
| 500 kWh | $177 |
| 1,000 kWh | $354 |
| 1,500 kWh | $531 |
The average price spreads fixed monthly charges over all kWh. At low usage your price per kWh is higher, at high usage lower. Your current tariff can differ from the 2025 average, especially after a rate case.
Calculate your bill · Heat pump vs furnace with this rate
Delivery-only customers
53,758 customers of United Illuminating Co bought their electricity supply from another provider and paid United Illuminating Co only for delivery: an average of 20.2¢/kWh. Their total price is that delivery charge plus their supplier's energy price (Connecticut average for supplier energy: 11.8¢/kWh).
Compare with other utilities in Connecticut
| Name | ¢/kWh | Avg. bill |
|---|---|---|
| Town of Wallingford | 17.8 | $152 |
| Connecticut Light & Power Co | 28.9 | $195 |
| United Illuminating Co | 35.4 | $183 |
Source: U.S. Energy Information Administration, Form EIA-861 annual data 2025 (released October 2026), utility ID 19497. Average price = residential revenue ÷ residential kWh sold; average bill = revenue ÷ customers ÷ 12.