Ameren Illinois Electric Rates and Average Monthly Bill

Ameren Illinois reported 587,659 residential customers on bundled service in 2025, using 888 kWh a month on average at 16.70 cents per kWh. Bundled means the utility supplies the energy and delivers it, so the price covers both. Among the 18 Illinois utilities with at least 10,000 bundled residential customers, Ameren Illinois ranks 15 from the lowest price.

Another 475,151 residential customers use Ameren Illinois for delivery only and buy their energy from a different supplier. EIA reports their delivery revenue at about 8.77 cents per kWh, or $76.67 a month, which does not include the supply price.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), sales to ultimate customers. Price is revenue divided by sales and includes fixed charges.

EIA lists the counties where Ameren Illinois has distribution equipment. That covers 81 counties in Illinois. A county can be served by more than one utility, so confirm your address with the utility or your bill.

Not sure who serves your address? Use find my electric company.

For 2025, Ameren Illinois reported an average of 130 minutes without power per customer and 0.94 interruptions per customer, with major event days left out. The typical interruption lasted about 138 minutes. For comparison, the median state averaged 127 minutes of outage per customer.

Ameren Illinois sits close to the median state on outage minutes. The Illinois figure across its utilities was 62 minutes. One interruption lasting 138 minutes and 0.94 interruptions a year per customer add up to the 130 minute total.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data), reliability schedule, measured under IEEE 1366. Utilities define events slightly differently, so compare with care.

• Time-of-use pricing. Ameren Illinois does not report a residential time-of-use program in its 2025 EIA filing. Ask the utility, because programs change. How time-of-use rates work.
• Rooftop solar and net metering. EIA shows 39,801 residential net-metered systems on the Ameren Illinois grid in 2025, with 437.8 megawatts of capacity. How net metering works.

A private company owned by shareholders. A state commission reviews its costs and sets or approves its rates in formal rate cases. In Illinois, that review is done by the Illinois Commerce Commission.

Ameren Illinois is an investor-owned utility based in Illinois.

Ameren Illinois operates in the MISO power market. Power markets set wholesale costs, but your retail rate is set by the rules described above.

By residential customers, Ameren Illinois ranks 2nd of the 23 utilities that report homes in Illinois, with about 19.6% of the state's homes. Illinois has too few other investor-owned utilities with reported prices to compare Ameren Illinois with its type, so the state average of 17.67 cents per kWh is the fairest yardstick. At $148.32 a month, an average Ameren Illinois home pays about $261 a year more than the Illinois average of $126.59, and uses 171 kWh a month more. Ameren Illinois lists distribution equipment in 81 counties, so check your county and your bill before you assume it serves you. 39,801 of its residential customers use net metering, or 37.4 per 1,000 homes, against 22.9 for Illinois as a whole.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Peers are other utilities of the same type in Illinois with at least 1,000 residential customers and a reported price.

See every one on the electric companies in Illinois page.

Kilowatt Atlas is not Ameren Illinois and does not take payments, start service or manage accounts. To pay a bill, report an outage or start service, use the website, app or phone number printed on your bill. Be careful with search ads and lookalike sites that offer to pay your bill for a fee.

• Want to understand a line on your bill? Read how to read your electric bill.
• Think your bill is high? Try the bill checker.
• Illinois allows retail choice in part or all of the state. See the provider guide.