16.70¢
per kWh, 2025
[ Ameren Illinois / IL ]
Ameren Illinois electricity rates in Illinois
NO RATE CASE ON FILE · DATA 2025
change in average rate, 2024→2025
+9.4%
vs 2024
1,062,810
residential customers
+71.5%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Ameren Illinois's average effective residential rate (16.70¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 10.32¢ | — | 1,060,473 |
| 2016 | 10.40¢ | +0.8% | 1,062,515 |
| 2017 | 10.40¢ | +0.0% | 1,059,300 |
| 2018 | 9.79¢ | −5.9% | 1,058,471 |
| 2019 | 9.42¢ | −3.8% | 1,059,134 |
| 2020 | 9.74¢ | +3.4% | 1,060,266 |
| 2021 | 11.17¢ | +14.7% | 1,063,026 |
| 2022 | 15.37¢ | +37.6% | 1,061,975 |
| 2023 | 17.04¢ | +10.9% | 1,060,030 |
| 2024 | 15.26¢ | −10.4% | 1,060,894 |
| 2025 | 16.70¢ | +9.4% | 1,062,810 |
How this compares
17.67¢
Illinois average, 2025
−5.5%
Ameren Illinois vs IL 2025 average
−3.1%
vs US 2025 average
#8
priciest in IL
Ameren Illinois files with the EIA as Ameren Illinois Company (utility ID 56697).
Serves 81 counties in Illinois: Adams, Alexander, Bond, Brown, Bureau, Calhoun, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Crawford, Cumberland, DeWitt, Douglas, Edgar, Edwards, Effingham, Fayette, Ford, Franklin, Fulton, Gallatin, Greene, Hancock, Henderson, Henry, Iroquois, Jackson, Jasper, Jefferson, Jersey, Johnson, Kendall, Knox, LaSalle, Lawrence, Livingston, Logan, Macon, Macoupin, Madison, Marion, Marshall, Mason, Massac, McDonough, McLean, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Peoria, Perry, Piatt, Pike, Pulaski, Putnam, Randolph, Richland, Saline, Sangamon, Schuyler, Scott, Shelby, St Clair, Stark, Tazewell, Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Williamson, Woodford. 893 ZIP codes.
What the numbers show
Since 2015, Ameren Illinois's average residential rate has gone from 10.32¢ to 16.70¢ per kWh: +61.8% over 10 years, or about +4.9% a year. It rose in 6 of the 10 years we can compare, and the biggest one-year increase was +37.6% in 2022. The largest drop was −10.4% in 2024.
For a home using 716 kWh a month, the Illinois average, Ameren Illinois's 2025 rate works out to about $1,435 a year, $83 less than at Illinois's average rate of 17.67¢. Of the 25 Illinois utilities in our data with a 2025 price, it is the 8th most expensive.
Ameren Illinois served 1,060,473 homes in 2015 and 1,062,810 in 2025 (+0.2%), about 20% of Illinois's residential electricity customers.
Who sets Ameren Illinois's rates
Ameren Illinois is investor-owned, so it can change its base rates only by filing a rate case with the Illinois Commerce Commission. The commission holds hearings and takes public comment before it rules, and it usually approves less than the company asks for. Fuel and other pass-through charges can change between rate cases.
Commission contact: Illinois Commerce Commission. How we calculate every figure on this page: methodology.
Questions
Is Ameren Illinois raising rates in 2026?
No rate case for Ameren Illinois is on file with the Illinois Commerce Commission in our tracker. Its average residential rate moved +9.4% from 2024 to 2025. We check the commission docket monthly.
What does Ameren Illinois charge per kWh?
Ameren Illinois's average effective residential rate was 16.70¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Illinois's 2025 average was 17.67¢.
How much have Ameren Illinois rates gone up in five years?
+71.5% between 2020 and 2025, against +51.6% for Illinois as a whole over the latest five-year window.
How many customers does Ameren Illinois have in Illinois?
1,062,810 residential customers in 2025, across 81 counties including Adams, Alexander, Bond, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey, which every US utility files. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)