Ameren Illinois Company: average rate and electric bill (2025)
Ameren Illinois Company (investor-owned utility, Illinois) served 587,659 homes in 2025. The average customer used 888 kWh a month and paid $148, an average price of 16.7¢ per kWh including fixed charges, riders and taxes. That is 5% below the Illinois average of 17.7¢.
What a bill costs at Ameren Illinois Company's average price
| Monthly usage | Estimated bill |
|---|---|
| 500 kWh | $84 |
| 1,000 kWh | $167 |
| 1,500 kWh | $251 |
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
475,151 customers of Ameren Illinois Company bought their electricity supply from another provider and paid Ameren Illinois Company only for delivery: an average of 8.8¢/kWh. Their total price is that delivery charge plus their supplier's energy price (Illinois average for supplier energy: 10.8¢/kWh).
Compare with other utilities in Illinois
| Name | ¢/kWh | Avg. bill |
|---|---|---|
| MidAmerican Energy Co | 10.0 | $74 |
| City of Springfield | 13.1 | $113 |
| City of Naperville | 14.6 | $112 |
| Southeastern IL Elec Coop, Inc | 14.8 | $181 |
| Southwestern Electric Coop Inc | 15.4 | $178 |
| Corn Belt Energy Corporation | 15.6 | $148 |
| Ameren Illinois Company | 16.7 | $148 |
| Sunrun Inc. | 17.0 | $112 |
| Commonwealth Edison Co | 17.7 | $107 |
Source: U.S. Energy Information Administration, Form EIA-861 annual data 2025 (released October 2026), utility ID 56697. Average price = residential revenue ÷ residential kWh sold; average bill = revenue ÷ customers ÷ 12.