utilityratecalc.com
Calculate

Ameren Illinois price to compare: current rate and history

The Ameren Illinois price to compare is 10.441¢ per kWh now (since October 1, 2026). On 1,000 kWh, that is $104.41 for the supply part of the bill. It is the price per kWh that Ameren Illinois charges for electricity supply when you do not select a supplier. Compare it with the price of a supplier offer. Each value below has a link to the official document.

Now
10.441¢
per kWh, since October 1, 2026
A year ago
8.402¢
+2.039¢ (+24%)
Highest since 2022
12.236¢
from October 2022
Lowest since 2022
5.478¢
from January 2022
Ameren Illinois price to compare, cents per kWh, January 2022 to November 2026.
0¢2¢4¢6¢8¢10¢12¢14¢2022202320242025202620270¢2¢4¢6¢8¢10¢12¢14¢202220232024202520262027

All periods

PeriodPrice to compareChangeSource
October 1, 2026 to nowMonthly row of the ICC table (month of service/billing period, as the table lists it) 10.441¢first 800 kWh 10.441¢; above 8.262¢ −0.885¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
June 1, 2026 to September 30, 2026Monthly row of the ICC table (month of service/billing period, as the table lists it) 11.326¢first 800 kWh 11.326¢; above 11.326¢ +2.557¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
January 1, 2026 to May 31, 2026Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.769¢first 800 kWh 8.769¢; above 7.850¢ +0.367¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
October 1, 2025 to December 31, 2025Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.402¢first 800 kWh 8.402¢; above 7.483¢ −3.778¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
June 1, 2025 to September 30, 2025Monthly row of the ICC table (month of service/billing period, as the table lists it) 12.180¢first 800 kWh 12.180¢; above 12.180¢ +3.903¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
January 1, 2025 to May 31, 2025Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.277¢first 800 kWh 8.277¢; above 7.693¢ +0.187¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
October 1, 2024 to December 31, 2024Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.090¢first 800 kWh 8.090¢; above 7.506¢ −0.046¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
June 1, 2024 to September 30, 2024Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.136¢first 800 kWh 8.136¢; above 8.136¢ −0.547¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
January 1, 2024 to May 31, 2024Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.683¢first 800 kWh 8.683¢; above 7.670¢ +0.576¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
October 1, 2023 to December 31, 2023Monthly row of the ICC table (month of service/billing period, as the table lists it) 8.107¢first 800 kWh 8.107¢; above 7.094¢ +0.230¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
June 1, 2023 to September 30, 2023Monthly row of the ICC table (month of service/billing period, as the table lists it) 7.877¢first 800 kWh 7.877¢; above 7.877¢ −3.956¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
May 1, 2023 to May 31, 2023Monthly row of the ICC table (month of service/billing period, as the table lists it) 11.833¢first 800 kWh 11.833¢; above 9.374¢ 0 ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
April 1, 2023 to April 30, 2023Monthly row of the ICC table (month of service/billing period, as the table lists it) 11.833¢first 800 kWh 11.833¢; above 9.384¢ 0 ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
January 1, 2023 to March 31, 2023Monthly row of the ICC table (month of service/billing period, as the table lists it) 11.833¢first 800 kWh 11.833¢; above 9.374¢ −0.403¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
October 1, 2022 to December 31, 2022Monthly row of the ICC table (month of service/billing period, as the table lists it) 12.236¢first 800 kWh 12.236¢; above 9.777¢ +1.608¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
July 1, 2022 to September 30, 2022Monthly row of the ICC table (month of service/billing period, as the table lists it) 10.628¢first 800 kWh 10.628¢; above 10.628¢ +0.005¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
June 1, 2022 to June 30, 2022Monthly row of the ICC table (month of service/billing period, as the table lists it) 10.623¢first 800 kWh 10.623¢; above 10.623¢ +5.145¢ ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"
January 1, 2022 to May 31, 2022Monthly row of the ICC table (month of service/billing period, as the table lists it) 5.478¢first 800 kWh 5.478¢; above 5.280¢ — ICC Historical Prices-to-Compare (PDF, updated through October 2026), the same values as the Excel version, Ameren Illinois table, columns "Residential Non-Space Heat" and "Usage above 800 kWh"

What the price includes

Rider BGS (BGS-1) retail purchased electricity charge plus the supply cost adjustments (Rider PER and Rider EUA) plus the Rider TS transmission service charge. It does not include the monthly purchased electricity adjustment (PEA). The ICC prints the PEA in a separate column of its table. In the non-summer months (October to May) the price has two blocks: first 800 kWh and over 800 kWh. The chart shows the price of the first 800 kWh; the table gives both blocks. In the summer months (June to September) one price applies to all kWh.

Each value is the price as the utility or the state printed it for that period. The value in effect now agrees with the supply charges of our Ameren Illinois bill calculator (10.440¢ per kWh). Ameren Illinois also publishes its own list of past prices.

How to compare a supplier offer

A supplier offer replaces only this price. The delivery charges of Ameren Illinois stay the same with any supplier. If an offer is less than the price to compare, you save the difference on each kWh while the offer price stays fixed. Read the contract term, the price after the term, and any monthly or early cancellation fee. The price to compare changes often, so compare the offer with the next value too.

Use the Ameren Illinois calculator: select "A supplier that I selected" and type the offer price to see your bill with it.

Other utilities in Illinois: ComEd. Compare them on one page: Illinois price to compare by utility. See all utilities.

Questions

What is the Ameren Illinois price to compare now?

10.441¢ per kWh, since October 1, 2026. On 1,000 kWh, the supply part of the bill is $104.41 at this price.

When does the Ameren Illinois price to compare change?

The current price has been in effect since October 1, 2026. It has changed 15 times since January 1, 2022.

What was the Ameren Illinois price to compare a year ago?

8.402¢ per kWh on November 2, 2025. The price now is 2.039¢ higher (24%).