Ameren Illinois Company electricity rates
Investor-owned utility · Illinois
Ameren Illinois Company is a for-profit, investor-owned utility regulated by the state utility commission, serving 587,659 homes in Illinois. Its residential customers pay an average of 17.28¢/kWh including fixed and delivery charges, 4% less than the U.S. average.
Rate basis: EIA-861M monthly utility data, 12 months ending 2026-07.
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Ameren Illinois Company bill estimates
| Monthly use | At average all-in rate |
|---|---|
| 500 kWh | $86.40 |
| 1,000 kWh | $172.80 |
| 1,500 kWh | $259.20 |
| 2,000 kWh | $345.60 |
Ameren Illinois Company residential rate plans
| Plan | Effective | Customer charge | Energy charges |
|---|---|---|---|
| DS-1 Residential Zone 3time-of-use | 2026-03-01 | $14.01 | 90.9¢ (12am–12am) — summer weekdays |
| DS-1 Residential Zone 3time-of-use | 2026-03-01 | $14.01 | 20.6¢ (12am–12am) — summer weekdays |
| DS-1 Residential Zone 2time-of-use | 2026-03-01 | $14.01 | 20.1¢ (12am–12am) — summer weekdays |
| DS-1 Residential Zone 1time-of-use | 2026-03-01 | $14.01 | 20.0¢ (12am–12am) — summer weekdays |
| DS-1 Residential Zone 2time-of-use | 2026-01-01 | $14.01 | 20.1¢ (12am–12am) — summer weekdays |
| DS-1 Residential Zone 1time-of-use | 2026-01-01 | $14.01 | 20.6¢ (12am–12am) — summer weekdays |
| DS-1time-of-use | nan | — | 4.2¢ (12am–12am) — summer weekdays |
Source: OpenEI U.S. Utility Rate Database. Rates change. Check the linked tariff or your bill for current figures.
Ameren Illinois Company rate history
2015–2025: +62% change in the average residential rate (10.32¢ → 16.70¢). Annual EIA-861 data.
Outages & reliability
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Reliability history
| 2025 | Ameren Illinois Company | Illinois avg | U.S. avg |
|---|---|---|---|
| Outage minutes per customer (SAIDI) | 287 | 148 | 266 |
| Outages per customer (SAIFI) | 1.19 | 0.87 | 1.34 |
| Average restoration time (CAIDI) | 4 hr 2 min | — | — |
| Outage minutes excluding major storms | 130 | 63 | 121 |
Outages in counties served (2025)
From ORNL EAGLE-I, which tracks customers without power every 15 minutes. These counts cover every utility in each county. Weighted across Ameren Illinois Company's counties, customers averaged 4 hr 39 min without power.
| County | Outage min/customer | Days with outages | Peak customers out | Worst day |
|---|---|---|---|---|
| Mercer | 4,953 | 56 | 1,938 | 2025-08-30 |
| Gallatin | 3,125 | 25 | 1,954 | 2025-01-06 |
| Saline | 1,993 | 53 | 7,444 | 2025-01-06 |
| Putnam | 962 | 25 | 1,458 | 2025-03-15 |
| Monroe | 882 | 54 | 9,159 | 2025-03-15 |
| Williamson | 879 | 54 | 10,894 | 2025-01-06 |
| Perry | 782 | 42 | 5,170 | 2025-03-15 |
| Johnson | 739 | 46 | 1,424 | 2025-04-14 |
| DeWitt | 695 | 40 | 2,596 | 2025-11-09 |
| Stark | 694 | 13 | 2,090 | 2025-12-29 |
| Shelby | 621 | 75 | 1,620 | 2025-05-09 |
| Franklin | 605 | 44 | 8,033 | 2025-10-08 |
| Henderson | 605 | 14 | 1,915 | 2025-10-24 |
| Union | 600 | 22 | 4,735 | 2025-03-13 |
| Calhoun | 565 | 18 | 1,114 | 2025-05-16 |
| Edgar | 551 | 23 | 6,299 | 2025-06-18 |
| Jackson | 517 | 62 | 6,017 | 2025-01-06 |
| Macoupin | 498 | 63 | 4,693 | 2025-05-16 |
| Clinton | 486 | 65 | 5,009 | 2025-02-02 |
| Fayette | 463 | 55 | 2,330 | 2025-07-11 |
| Alexander | 448 | 14 | 737 | 2025-03-13 |
| Madison | 447 | 47 | 18,731 | 2025-05-16 |
| Morgan | 407 | 21 | 11,730 | 2025-06-18 |
| Jersey | 400 | 52 | 4,393 | 2025-03-05 |
| St Clair | 398 | 66 | 18,062 | 2025-03-15 |
Ameren Illinois Company service area
Ameren Illinois Company serves 81 counties in Illinois and 966 ZIP codes.
Adams, Alexander, Bond, Brown, Bureau, Calhoun, Cass, Champaign, Christian, Clark, Clay, Clinton, Coles, Crawford, Cumberland, DeWitt, Douglas, Edgar, Edwards, Effingham, Fayette, Ford, Franklin, Fulton, Gallatin, Greene, Hancock, Henderson, Henry, Iroquois, Jackson, Jasper, Jefferson, Jersey, Johnson, Kendall, Knox, LaSalle, Lawrence, Livingston, Logan, Macon, Macoupin, Madison, Marion, Marshall, Mason, Massac, McDonough, McLean, Menard, Mercer, Monroe, Montgomery, Morgan, Moultrie, Peoria, Perry, Piatt, Pike, Pulaski, Putnam, Randolph, Richland, Saline, Sangamon, Schuyler, Scott, Shelby, St Clair, Stark, Tazewell, Union, Vermilion, Wabash, Warren, Washington, Wayne, White, Williamson, Woodford
Cities: Peoria, Springfield, North Peoria, Champaign, Bloomington, Decatur, Normal, Urbana, Belleville, Quincy, Pekin, Danville, Galesburg, Upper Alton, Granite City, O'Fallon, East Saint Louis, Alton, Carbondale, Edwardsville, Collinsville, East Peoria, Charleston, Jacksonville, Macomb, Yorkville, Ottawa, Mattoon, Marion, Godfrey, Fairview Heights, Washington, Morton, Mount Vernon, Cahokia, Canton, Lincoln, Swansea, Rantoul, Glen Carbon
Programs, smart meters & solar
| Smart meters (AMI) for homes | 100% |
| Customers with daily usage data online | 750,471 |
| Time-based rate programs | Real-time pricing, Peak-time rebates |
| Homes on time-based rates | 168,050 |
| Net-metered solar homes | 54,323 |
| Residential efficiency incentives paid (2025) | $37,480,184 |
| Residential energy saved by programs | 127,201 MWh |
Ameren Illinois Company at a glance
| Ownership | Investor-owned utility |
| Services | — |
| Commercial rate | 15.51¢/kWh |
| Industrial rate | 8.11¢/kWh |
| Retail revenue (2025) | $1,472,128,600 |
| Electricity sold (2025) | 9,489,654 MWh |
| Balancing authority | MISO |
| EIA utility ID | 56697 |
| Website | www.ilsag.info/evaluation-documents/evaluation_plans |
Other utilities in Illinois
Frequently asked questions
What is Ameren Illinois Company's electricity rate?
Ameren Illinois Company residential customers pay an average of 17.28¢ per kWh, all charges included (EIA-861M monthly utility data, 12 months ending 2026-07). That's 8% below the Illinois average of 18.79¢ and 4% below the U.S. average.
What is the average Ameren Illinois Company electric bill?
About $153 a month. The average Ameren Illinois Company home uses 888 kWh a month. At 1,000 kWh the bill would be about $173.
How many customers does Ameren Illinois Company have?
Ameren Illinois Company serves 587,659 residential customers and 1,229,940 customers in total in Illinois, across 81 counties.
How reliable is Ameren Illinois Company?
In 2025, the average Ameren Illinois Company customer was without power for 4 hr 47 min (SAIDI) over 1.19 interruptions (SAIFI), including major storms. Excluding major event days it was 2 hr 10 min. The Illinois average was 2 hr 28 min and the U.S. average 4 hr 26 min.
Does Ameren Illinois Company offer time-of-use rates?
Yes. The OpenEI rate database lists 7 time-of-use residential plans, including DS-1 Residential Zone 3. Running big appliances off-peak can cut their cost. Pick the plan in the calculator above to see by how much.
Does Ameren Illinois Company offer net metering for solar?
Ameren Illinois Company had 54,323 residential net-metered customers in 2025 with 511.5 MW of capacity. Estimate solar savings at this utility's rate.
Sources: EIA-861 2025 and EIA-861M (through July 2026), OpenEI URDB, ORNL EAGLE-I, U.S. Census. Methodology. Spot an error? Rates change often, so confirm with Ameren Illinois Company before making decisions.