Iowa · Investor Owned
Interstate Power and Light Co
17.77¢ per kWh, bundled, EIA-861 2025. Average bill $131.38 at 739.4 kWh a month, across 419,451 customers on that row.
Iowa averaged 13.62¢/kWh and $117.30 a month. The United States averaged 17.23¢/kWh and $150.68. State and national figures come from EIA's Average Bill file.
Revenue divided by sales, EIA-861 Sales to Ultimate Customers, 2025, released October 7, 2026. Texas wires utilities come from the Delivery Companies file. The price and bill use bundled service. Customer count: 419,451, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$177.70
17.77¢/kWh × 1,000 kWh. Bundled residential average, EIA-861 2025. The customer charge is already folded into this average, so it stands beside a tariff total rather than being added to it.
Annual history
| Year | ¢/kWh | Avg. bill | Avg. kWh | Customers |
|---|---|---|---|---|
| 2015 | 14.23¢ | $106.18 | 746.0 | 408,969 |
| 2016 | 14.77¢ | $111.20 | 752.7 | 402,199 |
| 2017 | 15.27¢ | $110.71 | 725.1 | 403,160 |
| 2018 | 15.85¢ | $122.72 | 774.5 | 403,726 |
| 2019 | 16.70¢ | $124.10 | 743.0 | 405,205 |
| 2020 | 16.61¢ | $122.98 | 740.2 | 407,849 |
| 2021 | 16.84¢ | $125.89 | 747.7 | 410,149 |
| 2022 | 17.75¢ | $136.01 | 766.2 | 412,497 |
| 2023 | 17.86¢ | $128.75 | 720.7 | 414,637 |
| 2024 | 17.90¢ | $127.80 | 713.8 | 417,153 |
| 2025 | 17.77¢ | $131.38 | 739.4 | 419,451 |
EIA-861, 2015–2025, using the same service type as the 2025 figure. A blank year means that service was not in the file.
Counties
Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler, Carroll, Cass, Cedar, Cerro Gordo, Cherokee, Chickasaw, Clarke, Clay, Clayton, Clinton, Dallas, Davis, Decatur, Delaware, Des Moines, Dickinson, Dubuque, Emmet, Fayette, Floyd, Franklin, Greene, Grundy, Guthrie, Hamilton, Hancock, Hardin, Henry, Howard, Iowa, Jackson, Jasper, Jefferson, Johnson, Jones, Keokuk, Kossuth, Lee, Linn, Louisa, Lucas, Lyon, Madison, Mahaska, Marion, Marshall, Mitchell, Monroe, Montgomery, Muscatine, O'Brien, Osceola, Palo Alto, Pocahontas, Polk, Poweshiek, Ringgold, Scott, Sioux, Story, Tama, Taylor, Union, Van Buren, Wapello, Warren, Washington, Wayne, Webster, Winnebago, Winneshiek, Worth, Wright.
EIA-861 Service Territory, 2025. A listed county is the county EIA recorded. It does not mean every address in the county is served. Open this utility in the bill calculator · Rate history tool