Ameren Illinois Company electric rates

Updated October 7, 2026 · Source: EIA Form 861 (2024), 25-0382

Investor-owned utility serving 1,060,894 homes in Illinois.

Your rate

11.76¢per kWh, average residential rate 28% lower than the U.S. average (16.4¢)

$99average monthly bill$1,187 a year

842kWh used per month, average home

+56%rate change since 2020U.S. average: +28%

Illinois is a retail-choice state: this utility's rate case sets the delivery part of your bill. The supply part comes from your chosen supplier or the default service rate.

Estimate your bill

Electricity you use each month (kWh)

It's on your bill, usually near the top. Starting at 842 kWh, the average for Ameren Illinois Company homes.

kWh

$99 a month

$12 fixed charge + 10.3¢ × 842 kWh

This is an estimate. Uses the EIA average rate with a nominal $12 fixed charge; real tariffs have tiers, time-of-use pricing and riders. Your bill also includes taxes and fuel adjustments that change month to month.

Rate cases

Docket	Status	Filed	Requested	Approved	Effective
25-0382	Approved	April 1, 2025	($59.6M)	—	January 1, 2026

25-0382: Annual reconciliation under Ameren Illinois' 2024-2027 multi-year rate plan: Ameren asked for $59.6 million; the ICC on December 18, 2025 approved about $48.4 million, trimming $11.2 million. Ameren said the full request would have added $0.39/month for a typical residential customer, so delivery rates were essentially unchanged in January 2026. Filing date approximate (spring 2025 filing, 8-month review). Source

Rate history

Ameren Illinois Company's average rate is up 56% since 2020, versus +28% for the U.S. average.

Average residential revenue per kWh, EIA-861. Includes delivery and, where the utility sells it, supply.

Rebates for heat pumps, batteries and EV chargers

We haven't found utility-level rebates for Ameren Illinois Company yet. Check Illinois programs or read what's left after the federal credits ended.

About Ameren Illinois Company

Ownership: Investor Owned
Homes served: 1,060,894 residential customers (2024)
Grid operator: MISO
Retail choice: Yes — you can pick a supplier for the energy portion
Data: EIA-861 2024, released October 7, 2026; rate cases checked October 7, 2026

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