Ameren Illinois electric rates and bill calculator

Current Ameren Illinois electricity rates

A Ameren Illinois bill for 1,000 kWh on Schedule DS-1, with all charges, at the rates in effect at our last check on October 16, 2026:

The average price includes the base rates and the riders. See all rates and riders, the example bills and the sources.

Average Ameren Illinois bill

In 2025, the average Ameren Illinois home that bought its power from Ameren Illinois used 888 kWh a month and paid $148.32 a month (16.7¢ per kWh). The average for all homes in Illinois was $126.59 (716 kWh, 17.7¢ per kWh). These are yearly averages from the EIA-861 data of the U.S. Energy Information Administration, at the rates of 2025. See the average electric bill in Illinois and in each state. To turn the watts of an appliance into dollars, use the electricity cost calculator.

For an apartment: with the EIA average kWh of small homes in the Midwest, a 1-bedroom apartment (513 kWh) costs about $102.05 a month on DS-1 and a 2-bedroom apartment (681 kWh) about $130.77 (November rates, before taxes). See the apartment electric bill at each utility.

Help paying your Ameren Illinois bill

• Electric low-income discount (affordability program): Starting June 2026, non-space heating customers pay no more than 3 percent of verified monthly income toward electric bills, and space heating customers no more than 6 percent. Enrolled customers are placed on rollover budget billing.
• Warm Neighbors Cool Friends: Bill payment assistance and help with weatherization improvement costs.
• Deferred Payment Agreements: Pay your balance over time. In winter, the utility must offer a plan with a down payment of at most 10 percent before disconnecting a heating customer.
• Budget Billing: A fixed monthly payment.
• Pick a Due Date: Choose the day your bill is due.
• Late fee and deposit waiver: Low-income customers are not charged late-payment fees or required to pay a deposit, and deposits already paid are refunded.

See all 7 Ameren Illinois bill help programs, with who qualifies, how to apply, state energy assistance and the shutoff rules.

Ameren Illinois rate increases

Rate cases of Ameren Illinois that are pending or were decided since 2025, from the official documents. The calculator above uses the rates in effect now; a pending request is not in it.

See all pending electric rate increases.

EV charging cost on Ameren Illinois

Charging an electric car for 1,000 miles a month (300 kWh) overnight on weekdays adds this much to a 1,000 kWh November bill:

Use your own miles, car and charging time in the EV charging cost calculator.

Terms on this tariff: Basic generation service (BGS), Clean energy charge, Coal plant retirement charge, Consolidated billing, Customer charge, Distribution charge, Energy efficiency charge, Energy storage charge, Environmental cost recovery, Excise tax, Meter charge, Purchase of receivables (POR), Renewable energy charge, Revenue decoupling, Rider, Supply charge, Transmission charge. See the electric bill glossary.

Do you have your hourly usage file? Compare Ameren Illinois plans and supplier offers with your Green Button data.

Why is my Ameren Illinois bill so high? Check your bill against Ameren Illinois DS-1. How does Ameren Illinois compare? See the monthly bill comparison.

What does an appliance cost to run on this tariff? Use the appliance cost tool with Ameren Illinois DS-1.

The rates in this calculator

These values come from the official tariff documents of Ameren Illinois. The Illinois Commerce Commission (ICC) approves these tariffs.

Minimum monthly bill: The customer charge and the meter charge, plus all other applicable charges.

A bill that crosses a season or rate change: the calculator uses the season of the billing month and does not split it. The Customer Terms and Conditions define the Summer Period as the June to September monthly periods, and a "month" as the period between regular meter readings.

Example bills for 1,000 kWh

These examples use 1,000 kWh. Rate zone: Rate Zone I. Each column uses the rates of the billing month in its heading. The examples include the Illinois electricity excise tax. Municipal taxes are not included. There is no example for the summer season: the utility has not published all the rates for it yet.

Sources and last check

We read each value from the official documents below. The approval column shows the docket, order or advice number that is printed on each sheet. Last check: October 16, 2026.

All values come from the Ameren Illinois tariff (Ill. C. C. No. 1) and its informational sheets, as linked from the Ameren Illinois residential rates page, except the transmission service charge, which comes from the Illinois Commerce Commission Plug In Illinois page. The Rate PBR-R Appendix (customer, meter and distribution delivery charges, EDT cost recovery) is an image in the PDF; its values were read with text recognition two times, with the same result. The Plug In Illinois price to compare (10.441¢ for the first 800 kWh, 8.262¢ over 800 kWh) agrees with the supply charge plus the two supply cost adjustments plus the transmission service charge. Ameren Illinois does not publish a typical bill with a line breakdown, so the test bills are hand calculations. Plug In Illinois price to compare for Ameren Illinois (Illinois Commerce Commission).

Questions about Ameren Illinois bills

utilityratecalc.com is not part of Ameren Illinois Company d/b/a Ameren Illinois or the Illinois Commerce Commission (ICC). For the official values, use your bill and the tariff of Ameren Illinois.