Interstate Power and Light Co Electricity Rate per kWh (2024 EIA Data)
Investor Owned|EIA utility 9417|Iowa|Bundled
In 2024, Interstate Power and Light Co's residential customers paid an average of 17.90 cents per kWh: $640 million of revenue over 3.57 million MWh of sales across 417,153 bundled residential customers, as reported to EIA on Form 861.
How the 17.90c figure is calculated
17.90c/kWh = $639,738k revenue / 3,573,253 MWh x 100. This is EIA's average realised price for 2024: everything Interstate Power and Light Co billed its residential customers (energy, delivery, fuel and rider charges, fixed charges) divided by the kilowatt-hours it sold. It is not a tariff rate, and a 2024 annual average will differ from a current bill. For a 1,000 kWh month at this average, the energy cost works out to about $179 before taxes.
About Interstate Power and Light Co's 2024 electricity prices
Interstate Power and Light Co is an investor-owned electric utility that reports to the U.S. Energy Information Administration under utility number 9417. In 2024 it served 417,153 bundled residential customers in Iowa, and its average realised residential price was 17.90 cents per kWh: $640 million of residential revenue divided by 3.57 million MWh of residential sales.
Across the other sectors, Interstate Power and Light Co's 2024 average prices were 13.42 cents for commercial customers (85,663 accounts) and 8.19 cents for industrial customers (1,330 accounts). Industrial customers paid 9.71 cents less per kWh than households, a 54% discount that is typical of high-volume, high-voltage service.
Within Iowa, Interstate Power and Light Co ranked number 2 of 24 utilities with bundled or delivery service by residential accounts served (417,153) and accounted for 24.70% of the state's residential electricity sales in 2024, measured in MWh sold or delivered rather than in customers. The state-wide average realised residential price in 2024, computed from the same EIA file, was 13.40 cents per kWh, so Interstate Power and Light Co's customers paid 4.50 cents above the Iowa average (+33.6%). For context, EIA's latest monthly figure for Iowa is 15.93 cents per kWh (June 2026, Electric Power Monthly); that is a different, more recent measure across all utilities and is not directly comparable with a 2024 annual average.
EIA's service-territory file places Interstate Power and Light Co in 84 Iowa counties: Adair, Adams, Allamakee, Appanoose, Benton, Black Hawk, Boone, Bremer, Buchanan, Buena Vista, Butler, and Carroll, and 72 more. On the grid side it operates in the MRO NERC region and the MISO market, and reported generation, buying transmission, distribution, buying distribution, and wholesale marketing as its activities. Balancing authority code: MISO.
EIA's preliminary 2025 early release (published 4 August 2026) shows a residential price of 17.77 cents per kWh for Interstate Power and Light Co in Iowa across 419,451 residential customers, 0.13 cents lower than the 2024 final figure. Early-release data has not been validated by EIA and must not be aggregated; the 2024 final figures remain the reference on this page until the 2025 final file is published.
The nearest other utilities in Iowa by service-territory centroid are Consumers Energy Coop (IA) (10.6 miles away, 15.00 cents), City of Ames (IA) (17.8 miles away, 12.10 cents), Cedar Falls Utilities (41.6 miles away, 10.42 cents), Midland Power Coop (41.7 miles away, 13.60 cents), and MidAmerican Energy Co (43.2 miles away, 11.01 cents).
| Sector | Customers | Sales (MWh) | Revenue ($k) | Avg c/kWh |
|---|---|---|---|---|
| Residential | 417,153 | 3,573,253 | 639,738 | 17.90 |
| Commercial | 85,663 | 4,005,972 | 537,537 | 13.42 |
| Industrial | 1,330 | 6,072,390 | 497,215 | 8.19 |
Counties served in Iowa (84)
From the EIA-861 Service Territory file; a listed county can be served in part only.
2025 early release (preliminary, not validated by EIA)
Residential price in Iowa: 17.77c/kWh (-0.13c vs 2024 final), 419,451 residential customers; commercial 15.05c; industrial 8.75c. Published 4 August 2026. EIA marks this file "not fully edited, use with caution"; the 2024 final figures above remain the reference.
Nearby and comparable utilities in Iowa
- EIA utility number
- 9417
- Ownership type
- Investor Owned
- Data year
- 2024 final (EIA-861)
- Primary state
- Iowa
- Service type
- Bundled (Part A)
- Bundled residential customers (IA, price basis)
- 417,153
- Residential accounts served (IA)
- 417,153
- All accounts, all sectors (IA)
- 504,146
- Residential price, 2024
- 17.90 c/kWh
- Commercial price, 2024
- 13.42 c/kWh
- Industrial price, 2024
- 8.19 c/kWh
- Residential sales
- 3.57 million MWh
- Residential revenue
- $640 million
- Rank in Iowa by residential accounts served
- 2 of 24
- Share of Iowa residential sales (MWh, not customers)
- 24.70%
- Iowa average, 2024
- 13.40 c/kWh
- Counties served (IA)
- 84
- NERC region
- MRO
- RTO / ISO
- MISO
- Balancing authority
- MISO
- Reported activities
- Generation, Buying Transmission, Distribution, Buying Distribution, Wholesale Marketing
- 2025 early release (preliminary)
- 17.77 c/kWh
- Change vs 2024 final
- -0.13 c/kWh
- Registry status
- Reported on Form EIA-861 for 2024
Realised price times usage; fixed charges are already inside the average. Bill calculator ->
Annual averages hide seasonal and tariff differences. Diagnose a high bill or model time-of-use pricing.
Bill Diagnostic ->Time-of-Use Guide ->Source: U.S. Energy Information Administration, Form EIA-861 Annual, 2024 final data (public domain), retrieved 28 August 2026; prices are average realised revenue per kWh, not tariffs. Final 2024 file f8612024.zip (released 3 December 2025) from the EIA-861 detailed data files. Preliminary 2025 figures come from the early-release file f8612025er.zip (4 August 2026), which EIA has not yet validated; they are labelled as such wherever shown and never mixed into a final figure.
Method: cents per kWh = revenue (thousand dollars) divided by sales (megawatthours), times 100. Customer counts, sales and revenue are the utility's own annual survey responses by state and sector. Bundled = energy plus delivery from one utility; delivery-only = the wires charge for customers who buy energy from a competitive supplier; energy-only = a competitive supplier's energy charge without delivery. County lists come from the EIA-861 Service Territory file; territory centroids used for "nearby utilities" are unweighted means of Census 2023 county centroids. EIA content is in the public domain (EIA copyright and reuse statement); the EIA logo is not used. Corrections: [email protected].