Rates by state / Illinois / Ameren Illinois Company
Investor Owned · 1,062,810 residential customers
Ameren Illinois Company electricity rates
Residential customers paid an average of 16.7¢ per kWh in 2025, 11% below the Illinois average of 18.8¢ for the latest 12 months.
Average rate
16.7¢/kWh
2025, all residential revenue ÷ kWh
Average bill
$147/mo
At 882 kWh a month
1-year change
+9.4%
5 years: +71.5%
Average rate by year
20209.7¢
202111.2¢
202215.4¢
202317.0¢
202415.3¢
202516.7¢
Ameren Illinois Company bill at different usage levels
Estimated monthly bill at Ameren Illinois Company's 2025 average rate of 16.7¢ per kWh. Actual bills vary with your plan, fixed charges and taxes.
| Monthly use | Ameren Illinois Company | Illinois average |
|---|---|---|
| 500 kWh | $84 | $94 |
| 750 kWh | $125 | $141 |
| 1,000 kWh (about average here) | $167 | $188 |
| 1,500 kWh | $251 | $282 |
| 2,000 kWh | $334 | $376 |
Other utilities in Illinois
| Utility | Customers | Rate |
|---|---|---|
| Commonwealth Edison Co | 3,753,924 | 17.7¢ |
| MC Squared Energy Services, LLC | 263,681 | 17.0¢ |
| Homefield Energy | 147,108 | 19.5¢ |
| Reliant Energy Northeast LLC | 142,167 | 20.8¢ |
| Constellation NewEnergy, Inc | 125,423 | 18.3¢ |
| MidAmerican Energy Co | 73,481 | 10.0¢ |
| City of Springfield - (IL) | 59,366 | 13.1¢ |
| City of Naperville - (IL) | 57,225 | 14.6¢ |
Ameren Illinois Company: common questions
- How much does Ameren Illinois Company charge per kWh?
- Ameren Illinois Company residential customers paid an average of 16.7¢ per kWh in 2025, counting all charges, according to EIA Form 861 data.
- What is the average Ameren Illinois Company electric bill?
- The average Ameren Illinois Company household used 882 kWh a month in 2025, which works out to about $147 a month at the average rate.
- Is Ameren Illinois Company cheaper than other utilities in Illinois?
- Ameren Illinois Company's average rate is 11% below the Illinois average of 18.8¢. 19 of 77 utilities in Illinois have a lower average rate.
- Did Ameren Illinois Company raise rates?
- Ameren Illinois Company's average residential rate changed +9.4% from 2024 to 2025 and +71.5% since 2020.
- Is my Ameren Illinois Company bill too high?
- Enter the kWh and amount from your bill in the free bill check on AverageElectricBill.com. It compares your use with similar Illinois homes and your rate with Ameren Illinois Company's average.
Got a Ameren Illinois Company bill?
Check my billSource: U.S. EIA Form EIA-861, 2025 final data.