Ameren Illinois electricity rates
Ameren Illinois is the regulated delivery utility for Central and southern Illinois. It delivers your power and reads your meter no matter who supplies the electricity. It serves about 520,498 residential customers, at an all-in average residential rate of 15.26¢/kWh (EIA 2024).
The Ameren Illinois Price to Compare
Price to Compare (summer rate for the first 800 kWh, effective June 1 through September 30, 2026)
11.326¢/kWh
Ameren's Price to Compare is tiered by usage and changes by season, so the figure above is the summer 0–800 kWh rate. The non-summer supply charge is lower. Check the current value for your usage and the time of year before comparing.
Source: Plug In Illinois (ICC)
The Price to Compare is the supply rate, the part of your bill you can shop. It is the benchmark a competitive ARES offer has to beat to save you money. It is not the same as the all-in average rate above, which also includes delivery.
Check whether you're aggregated first.
The Price to Compare is your benchmark to beat, but only if you're actually on it. If your community runs a municipal aggregation program, you were likely auto-enrolled in a different supply rate, and that aggregation rate is what an offer really has to beat. Look at your bill, or see how Illinois aggregation works, before you assume you're paying the Ameren Illinois default.
Delivery and outages
Ameren Illinois handles delivery and emergencies for Central and southern Illinois, and operates in the MISO grid region. Switching your supplier never changes who restores your power. To report an outage, call 800-755-5000.