Ameren Illinois in Illinois: programs for its customers
Ameren Illinois delivers electricity and natural gas across central and southern Illinois.
Programs from Ameren Illinois
The program list for Ameren Illinois is being verified, and nothing appears here until it has been checked against its source.
Programs and rules that apply across Illinois are on the Illinois page.
Figures for Illinois
These describe Illinois as a whole. They are not Ameren Illinois's own rates or customers.
- What electricity costs
- 18.4 cents per kWhAverage residential price in Illinois, 2025-06 to 2026-05. The price is up 42.3% over five years.Source: EIA Form 861M, trailing 12 months to 2026-05
- Energy cost against income
- 6.11% of incomeAverage household energy spending in Illinois, as a share of median household income, 2024.Source: BEA Regional accounts; Census Bureau American Community Survey 1-year estimates; EIA State Energy Data System, 2024
- Rooftop solar
- 165.9 watts per householdResidential small-scale solar capacity in Illinois, divided by its households, 2024.Source: Census Bureau American Community Survey 1-year estimates; EIA Form 861M small-scale solar, 2024
Grid operator
Ameren Illinois sits in Midcontinent Independent System Operator (MISO).
Wholesale prices through the day
Wholesale electricity costs more at some hours than at others. The chart averages a year of day-ahead prices, the prices a grid's market sets the day before, for each hour of the day.
In MISO the dearest hours over the last year were 5, 6 and 7 pm Central time.
Work you can get done
Installers
No installer is listed for Illinois yet. Building Energy Group does not rate installers and publishes no reviews.
Sources
- Ameren Illinois
- Figures: BEA Regional accounts
- Figures: Census Bureau American Community Survey 1-year estimates
- Figures: EIA Form 861M
- Figures: EIA Form 861M small-scale solar
- Figures: EIA State Energy Data System