Rates by state / South Dakota / NorthWestern Energy - (SD)
Investor Owned · 51,787 residential customers
NorthWestern Energy - (SD) electricity rates
Residential customers paid an average of 13.3¢ per kWh in 2025, 6% below the South Dakota average of 14.2¢ for the latest 12 months.
Average rate
13.3¢/kWh
2025, all residential revenue ÷ kWh
Average bill
$125/mo
At 939 kWh a month
1-year change
+6.3%
5 years: +17.1%
Average rate by year
202011.4¢
202111.4¢
202211.7¢
202311.3¢
202412.6¢
202513.3¢
NorthWestern Energy - (SD) bill at different usage levels
Estimated monthly bill at NorthWestern Energy - (SD)'s 2025 average rate of 13.3¢ per kWh. Actual bills vary with your plan, fixed charges and taxes.
| Monthly use | NorthWestern Energy - (SD) | South Dakota average |
|---|---|---|
| 500 kWh | $67 | $71 |
| 750 kWh | $100 | $107 |
| 1,000 kWh (about average here) | $134 | $142 |
| 1,500 kWh | $200 | $213 |
| 2,000 kWh | $267 | $284 |
Other utilities in South Dakota
| Utility | Customers | Rate |
|---|---|---|
| Northern States Power Co - Minnesota | 94,137 | 13.1¢ |
| Black Hills Power, Inc. | 67,608 | 15.1¢ |
| Sioux Valley SW Elec Coop | 22,989 | 13.9¢ |
| Southeastern Electric Coop Inc - (SD) | 20,959 | 13.0¢ |
| West River Electric Assn Inc | 18,975 | 15.2¢ |
| Watertown Municipal Utilities | 11,775 | 9.3¢ |
| City of Brookings - (SD) | 10,769 | 10.7¢ |
| Black Hills Electric Coop, Inc | 9,415 | 14.8¢ |
NorthWestern Energy - (SD): common questions
- How much does NorthWestern Energy - (SD) charge per kWh?
- NorthWestern Energy - (SD) residential customers paid an average of 13.3¢ per kWh in 2025, counting all charges, according to EIA Form 861 data.
- What is the average NorthWestern Energy - (SD) electric bill?
- The average NorthWestern Energy - (SD) household used 939 kWh a month in 2025, which works out to about $125 a month at the average rate.
- Is NorthWestern Energy - (SD) cheaper than other utilities in South Dakota?
- NorthWestern Energy - (SD)'s average rate is 6% below the South Dakota average of 14.2¢. 14 of 21 utilities in South Dakota have a lower average rate.
- Did NorthWestern Energy - (SD) raise rates?
- NorthWestern Energy - (SD)'s average residential rate changed +6.3% from 2024 to 2025 and +17.1% since 2020.
- Is my NorthWestern Energy - (SD) bill too high?
- Enter the kWh and amount from your bill in the free bill check on AverageElectricBill.com. It compares your use with similar South Dakota homes and your rate with NorthWestern Energy - (SD)'s average.
Got a NorthWestern Energy - (SD) bill?
Check my billSource: U.S. EIA Form EIA-861, 2025 final data.