South Dakota · Investor Owned
Montana-Dakota Utilities Co
12.99¢ per kWh, bundled, EIA-861 2025. Average bill $110.69 at 852.4 kWh a month, across 6,348 customers on that row.
South Dakota averaged 13.32¢/kWh and $131.10 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: 6,348, the largest residential count across service types.
Estimate a bill
The figure below is this utility's 2025 EIA residential average.
2025 EIA average
$129.90
12.99¢/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 | 9.43¢ | $82.85 | 879.0 | 6,558 |
| 2016 | 11.21¢ | $96.04 | 857.0 | 6,534 |
| 2017 | 10.82¢ | $93.66 | 865.5 | 6,512 |
| 2018 | 10.82¢ | $100.07 | 924.9 | 6,458 |
| 2019 | 11.24¢ | $102.74 | 913.9 | 6,427 |
| 2020 | 11.04¢ | $96.52 | 874.0 | 6,441 |
| 2021 | 11.25¢ | $98.64 | 877.1 | 6,390 |
| 2022 | 12.23¢ | $111.61 | 912.3 | 6,384 |
| 2023 | 12.49¢ | $109.63 | 877.8 | 6,373 |
| 2024 | 14.59¢ | $121.53 | 832.7 | 6,367 |
| 2025 | 12.99¢ | $110.69 | 852.4 | 6,348 |
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
Brown, Campbell, Corson, Day, Edmunds, Faulk, Grant, Harding, McPherson, Perkins, Potter, Roberts, Walworth.
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