NorthWestern Energy LLC (MT) electricity rates in Montana, 2025
NorthWestern Energy LLC (MT)’s 333,711 residential customers paid an average of 14.42¢ per kWh in 2025, 11% above the Montana average of 12.99¢. The typical home used 707 kWh a month, for an average bill of $102.
- 14.42¢avg ¢/kWh (2025)+0.20¢ (+1.4%) vs 2024
- $102Avg monthly billMontana: $111
- 707 kWhAvg monthly useMontana: 853 kWh
- 333,711Residential customersFull-service utility
| Sector | Customers | Sales (MWh) | Revenue | ¢/kWh 2025 | ¢/kWh 2024 | Change |
|---|---|---|---|---|---|---|
| Residential | 333,711 | 2,831,009 | $408,352,000 | 14.42¢ | 14.23¢ | +0.20¢ (+1.4%) |
| Commercial | 102,189 | 3,137,164 | $420,602,000 | 13.41¢ | 13.46¢ | −0.05¢ (-0.4%) |
| Industrial | 2,411 | 413,101 | $43,353,000 | 10.49¢ | 10.77¢ | −0.27¢ (-2.5%) |
| All sectors | 438,311 | 6,381,274 | $872,307,000 | 13.67¢ | 13.62¢ | +0.05¢ (+0.4%) |
How NorthWestern Energy LLC (MT) compares
- Montana residential average, 2025: 12.99¢ per kWh, 853 kWh a month, $111 average bill. U.S. average: 17.23¢, 874 kWh, $151.
- Among 10 full-service utilities in Montana with at least 1,000 residential customers, NorthWestern Energy LLC (MT) ranks 9 of 10 from lowest to highest average price.
- Latest monthly figure: Montana homes paid 15.57¢ per kWh in August 2026 (preliminary), against 14.29¢ in August 2025. Summer months often run higher than the annual average.
- From 2024 to 2025 this average rose 1.4%; the state average rose 2.6%.
- Another 2 residential customers buy supply from a competitive supplier and pay NorthWestern Energy LLC (MT) only for delivery, averaging 8.00¢ per kWh for that service.
- NorthWestern Energy LLC (MT) is an investor-owned utility, a private company whose rates are set by the state utility commission. Balancing authority: NWMT.
Where NorthWestern Energy LLC (MT) serves
EIA lists 36 Montana counties in its 2025 service territory: Beaverhead, Big Horn, Blaine, Broadwater, Carbon, Cascade, Chouteau, Deer Lodge, Fergus, Gallatin, Golden Valley, Granite, Hill, Jefferson, Judith Basin, Lewis and Clark, Liberty, Madison, Meagher, Mineral, Missoula, Musselshell, Park, Phillips, Pondera, Powell, Ravalli, Rosebud, Sanders, Silver Bow, Stillwater, Sweet Grass, Teton, Valley, Wheatland, Yellowstone.
229 ZIP codes are matched to NorthWestern Energy LLC (MT) in NREL’s 2024 ZIP file: 59001, 59007, 59008, 59011, 59012, 59014, 59015, 59019, 59020, 59025, 59026, 59027, 59028, 59029, 59030, 59033, 59034, 59035, 59036, 59037, 59041, 59044, 59046, 59047, 59052, 59053, 59054, 59055, 59057, 59059, 59061, 59062, 59063, 59065, 59066, 59067, 59068, 59069, 59070, 59071, 59072, 59073, 59074, 59078, 59081, 59082, 59083, 59085, 59086, 59089, 59101, 59102, 59103, 59104, 59105, 59106, 59108, 59112, 59230, 59241, and 169 more. Utility boundaries do not follow ZIP lines, so a ZIP can have more than one provider.
Montana full-service utilities with similar rates
| Provider | ¢/kWh | Avg bill | Customers |
|---|---|---|---|
| USBIA-Mission Valley Power | 9.39¢ | $120 | 16,353 |
| Flathead Electric Coop Inc | 10.04¢ | $119 | 64,334 |
| Missoula Electric Coop, Inc | 10.93¢ | $117 | 14,867 |
| Fall River Rural Elec Coop Inc | 11.11¢ | $122 | 1,525 |
| Montana-Dakota Utilities Co | 12.33¢ | $95 | 19,626 |
| Northern Lights, Inc | 13.06¢ | $118 | 4,700 |
| Yellowstone Valley Elec Co-op | 14.22¢ | $127 | 21,471 |
| Fergus Electric Coop, Inc | 15.91¢ | $143 | 6,855 |
Sources
- U.S. Energy Information Administration, Annual Electric Power Industry Report, Form EIA-861, 2025 final data (f8612025.zip, file dated October 7, 2026): Sales to Ultimate Customers, Average Monthly Bill and Service Territory tables.
- EIA Form EIA-861, 2024 final data (f8612024.zip, file dated December 4, 2025), for the 2024 comparison.
- EIA Electric Power Monthly, Table 5.6.A (average price by state, August 2026 and August 2025; 2026 values are preliminary), file dated October 22, 2026.
- National Renewable Energy Laboratory via OpenEI, U.S. Electric Utility Companies and Rates: Look-up by Zipcode (2024) (investor-owned and other utilities, files dated November 10, 2025), used only to match ZIP codes to utilities.
Average price = residential revenue ÷ residential kWh sold, as reported to EIA. It includes fixed monthly charges, taxes passed through in revenue and seasonal tiers, averaged over the year. Your own rate depends on your tariff and usage.