Indiana Michigan Power Co
Investor Owned electric utility · Indiana · #61 of 3,199 U.S. utilities by customers · EIA utility #9324
Indiana Michigan Power Co is a investor owned electric utility serving 618,131 customers in Indiana, Michigan. In 2025 it sold 19,023 gigawatt-hours of electricity for $2.42B in revenue, an average realized rate of 12.73¢ per kWh across all customer classes and 17.17¢ per kWh for residential customers. Its reported service territory covers 31 counties. EIA records its activities as: generation, transmission, buying transmission, distribution, wholesale marketing.
Customers, sales and rates by customer class (2025)
| Class | Customers | Sales (GWh) | Revenue | Avg realized rate | Share of sales |
|---|---|---|---|---|---|
| Residential | 537,980 | 5,473 | $939.69M | 17.17¢ | |
| Commercial | 75,480 | 6,563 | $848.58M | 12.93¢ | |
| Industrial | 4,671 | 6,987 | $634.24M | 9.08¢ | |
| Total | 618,131 | 19,023 | $2.42B | 12.73¢ |
Average realized rate = revenue divided by sales as reported on EIA Form 861. It blends fixed charges, demand charges and riders into one per-kWh figure; it is not the utility's tariff rate. Estimated residential bill assumes the average residential customer's actual 2025 usage (848 kWh/month).
Operations by state
| State | Customers | Sales (GWh) | Residential rate |
|---|---|---|---|
| Indiana | 485,543 | 16,395 | 17.16¢ |
| Michigan | 132,588 | 2,628 | 17.19¢ |
Five-year trend
| Year | Customers | Sales (GWh) | Revenue | Residential rate |
|---|---|---|---|---|
| 2021 | 604,489 | 17,208 | $1.90B | 14.97¢ |
| 2022 | 607,665 | 17,519 | $2.07B | 15.84¢ |
| 2023 | 610,570 | 17,233 | $1.98B | 16.01¢ |
| 2024 | 614,505 | 17,624 | $2.11B | 16.45¢ |
| 2025 | 618,131 | 19,023 | $2.42B | 17.17¢ |
Reliability (2025)
Average outage time (SAIDI): 283 minutes per customer per year
Average outages (SAIFI): 0.97 per customer
Average restoration time (CAIDI): 291 minutes
As reported for Indiana under the IEEE standard, with major event days included where the standard reports them. Lower is better; see the reliability rankings.
Energy supply (2025)
Net generation: 20,484 GWh
Wholesale power purchased: 7,244 GWh
Winter peak demand: 3,478 MW
Energy losses: 7.7% of energy handled
Meters & rooftop solar (2025)
Smart (AMI) meters: 99.6% of 620,914 meters
Customer-sited generation (net metering): 2,741 installations, 53.3 MW of capacity
This utility also reported 47 delivery-only customers (284 GWh delivered) in 2025. Delivery figures are excluded from the totals above because the same electricity is also reported by the energy supplier - see Methodology.
Counties served
Adams, INAllegan, MIAllen, INBerrien, MIBlackford, INCass, MIDeKalb, INDelaware, INElkhart, INGrant, INHamilton, INHenry, INHoward, INHuntington, INJay, INKalamazoo, MILaPorte, INLagrange, INMadison, INMarshall, INMiami, INNoble, INRandolph, INSt Joseph, INSt Joseph, MISteuben, INTipton, INVan Buren, MIWabash, INWells, INWhitley, IN
Other large utilities in Indiana
- Duke Energy Indiana, LLC - 921,804 customers, residential 14.98¢
- AES Indiana - 530,671 customers, residential 14.69¢
- Northern Indiana Pub Serv Co - 496,542 customers, residential 22.05¢
- Southern Indiana Gas & Elec Co - 154,465 customers, residential 19.78¢
- Hendricks County Rural E M C - 39,621 customers, residential 13.68¢
- South Central Indiana REMC - 35,833 customers, residential 17.54¢
- City of Anderson - (IN) - 33,543 customers, residential 12.67¢
- Northeastern Rural E M C - 33,173 customers, residential 15.43¢
All Indiana utilities and rates
Source: U.S. Energy Information Administration, Form EIA-861 2025 (filed by the utility; figures as published). Utility #9324 in the EIA frame.