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Interstate Power and Light Co
Interstate Power and Light Co served 419,451 residential customers in Iowa in 2025 (28.7% of the state's residential customers), the 2nd largest of 25 utilities reporting there. Bundled service; ownership: investor owned; balancing authority MISO.
The meter, one average month.
Scroll to run 30 days of Interstate Power and Light Co's average residential use through a five-dial register.
- Used so far
- 739 kWh
- At 17.77¢/kWh
- $131
Price ruler0 to 50¢ per kWh
Where 17.77¢ sits.
Interstate Power and Light Co averaged 17.77¢ per kWh against a Iowa residential average of 13.72¢: 29.5% above the state figure. Among the 3 investor owned utilities in Iowa with bundled residential sales, it ranks 3rd from the lowest price.
2020 and 2025EIA-861
Five years, same meter.
In 2020 the average Interstate Power and Light Co home used 740 kWh a month at 16.61¢ and paid $123. In 2025 it used 739 kWh at 17.77¢ and paid $131: the price per kWh is up 7%.
| Measure | 2020 | 2025 |
|---|---|---|
| Price, ¢/kWh | 16.61 | 17.77 |
| Use, kWh a month | 740 | 739 |
| Bill, US$ a month | 122.98 | 131.38 |
| Class | Customers | MWh sold | ¢/kWh |
|---|---|---|---|
| Residential | 419,451 | 3,721,680 | 17.77 |
| Commercial | 85,846 | 4,127,001 | 15.05 |
| Industrial | 1,201 | 6,064,629 | 8.75 |
Who else is on the line
Homes are one class.
Homes took 26.7% of the electricity Interstate Power and Light Co sold in Iowa in 2025.
Rooftop solar on its linesnet metering
12,379 roofs.
- Residential net-metered PV
- 12,379installations reported for 2025
- Capacity
- 100.1 MWresidential, net metered
- Per 1,000 homes
- 29.5installations per 1,000 residential customers
Service territoryEIA-861
84 counties.
AdairAdamsAllamakeeAppanooseBentonBlack HawkBooneBremerBuchananBuena VistaButlerCarrollCassCedarCerro GordoCherokeeChickasawClarkeClayClaytonClintonDallasDavisDecatur
Counties in Iowa where Interstate Power and Light Co reported serving customers in 2025 (84 in all; up to 24 listed).
EIA-8612025Utility 9417
The filing, line by line.
| Measure | Value | Unit |
|---|---|---|
| Average price | 17.77 | ¢/kWh |
| Iowa average price | 13.72 | ¢/kWh |
| Difference from state average | 29.5 | % |
| Price change over 5 years | 7.0 | % |
| Typical monthly use | 739 | kWh |
| Typical monthly bill | 131.38 | US$ |
| Residential customers | 419,451 | accounts |
| Share of IA residential customers | 28.7 | % |
| Size rank in IA | 2 of 25 | by customers |
| Price rank, investor owned peers | 3 of 3 | 1 = lowest |
Rate plans on fileOpenEI URDB
3 active plans.
- Time-of-use
- 2more than one energy period within a month
- Seasonal only
- 1price changes by month, not by hour
Active residential plans: not ended, started within the last 5 years, latest version of each plan name. Time-of-use means more than one energy period within a single month; plans whose price changes only by season are counted as seasonal.