17.77¢
per kWh, 2025
[ Alliant Energy Iowa / IA ]
Alliant Energy Iowa electricity rates in Iowa
NO RATE CASE ON FILE · DATA 2025
change in average rate, 2024→2025
−0.7%
vs 2024
419,451
residential customers
+7.0%
since 2020
What your bill becomes
Bill today
No change on file
Difference / month · / year
Estimated at Alliant Energy Iowa's average effective residential rate (17.77¢/kWh, EIA, all charges included). Your tariff, fees and taxes differ.
Rate history 2015–2025
| Year | ¢/kWh | Change | Customers |
|---|---|---|---|
| 2015 | 14.23¢ | — | 408,969 |
| 2016 | 14.77¢ | +3.8% | 402,199 |
| 2017 | 15.27¢ | +3.4% | 403,160 |
| 2018 | 15.85¢ | +3.8% | 403,726 |
| 2019 | 16.70¢ | +5.4% | 405,205 |
| 2020 | 16.61¢ | −0.5% | 407,849 |
| 2021 | 16.84¢ | +1.4% | 410,149 |
| 2022 | 17.75¢ | +5.4% | 412,497 |
| 2023 | 17.86¢ | +0.6% | 414,637 |
| 2024 | 17.90¢ | +0.2% | 417,153 |
| 2025 | 17.77¢ | −0.7% | 419,451 |
How this compares
13.62¢
Iowa average, 2025
+30.5%
Alliant Energy Iowa vs IA 2025 average
+3.1%
vs US 2025 average
#1
priciest in IA
Alliant Energy Iowa files with the EIA as Interstate Power and Light Co (utility ID 9417).
Serves 84 counties in Iowa: 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. 641 ZIP codes.
What the numbers show
Since 2015, Alliant Energy Iowa's average residential rate has gone from 14.23¢ to 17.77¢ per kWh: +24.9% over 10 years, or about +2.2% a year. It rose in 8 of the 10 years we can compare, and the biggest one-year increase was +5.4% in 2022. The largest drop was −0.7% in 2025.
For a home using 861 kWh a month, the Iowa average, Alliant Energy Iowa's 2025 rate works out to about $1,836 a year, $429 more than at Iowa's average rate of 13.62¢. Of the 25 Iowa utilities in our data with a 2025 price, it is the most expensive.
Alliant Energy Iowa served 408,969 homes in 2015 and 419,451 in 2025 (+2.6%), about 28% of Iowa's residential electricity customers.
Who sets Alliant Energy Iowa's rates
Alliant Energy Iowa is investor-owned, so it can change its base rates only by filing a rate case with the Iowa Utilities Commission. The commission holds hearings and takes public comment before it rules, and it usually approves less than the company asks for. Fuel and other pass-through charges can change between rate cases.
Commission contact: Iowa Utilities Commission. How we calculate every figure on this page: methodology.
Questions
Is Alliant Energy Iowa raising rates in 2026?
No rate case for Alliant Energy Iowa is on file with the Iowa Utilities Commission in our tracker. Its average residential rate moved −0.7% from 2024 to 2025. We check the commission docket monthly.
What does Alliant Energy Iowa charge per kWh?
Alliant Energy Iowa's average effective residential rate was 17.77¢ per kWh in 2025 (EIA-861, revenue divided by sales, all charges included). Iowa's 2025 average was 13.62¢.
How much have Alliant Energy Iowa rates gone up in five years?
+7.0% between 2020 and 2025, against +11.1% for Iowa as a whole over the latest five-year window.
How many customers does Alliant Energy Iowa have in Iowa?
419,451 residential customers in 2025, across 84 counties including Adair, Adams, Allamakee, according to the EIA-861 survey.
Where do these numbers come from?
Rates and customer counts are from the US Energy Information Administration's annual EIA-861 survey, which every US utility files. Nothing here is a utility bill; use it to understand the direction and size of changes.
Sources
- EIA-861 Sales to Ultimate Customers, 2015–2025 (released 2026-10-07)
- EIA-861M monthly state averages through Jul 2026
- NREL utility-by-ZIP lookup (2024)