Electricity rates in Idaho: 12.65¢ per kWh
Homes in Idaho paid an average of 12.65¢ per kilowatt-hour from August 2025 to July 2026, 30% below the U.S. average of 17.99¢. That is the second-lowest of 51, between Nebraska (12.86¢) and North Dakota (12.32¢).
The average Idaho home used 904 kWh a month — the 24th-most of the 51 — so its typical bill came to $114 a month, the 4th-lowest. At the national rate the same 904 kWh would cost $48 more a month.
In July 2026, the latest month published, the Idaho rate was 13.73¢.
| Rank | State | Average rate | Latest month | Average home use | Average bill |
|---|---|---|---|---|---|
| 48 | Louisiana | 12.99¢ | 12.72¢ | 1,200 kWh/mo | $156/mo |
| 49 | Nebraska | 12.86¢ | 13.78¢ | 954 kWh/mo | $123/mo |
| 50 | Idaho | 12.65¢ | 13.73¢ | 904 kWh/mo | $114/mo |
| 51 | North Dakota | 12.32¢ | 13.41¢ | 1,075 kWh/mo | $132/mo |
What a month of electricity costs in Idaho
At 12.65¢ per kWh, every extra 100 kWh a month adds $12.65 to the monthly bill and $152 to the year. The table runs from half to twice the Idaho average home's 904 kWh, using the same calculation as the calculator above.
| Monthly use | Per month | Per year | vs. U.S. rate (17.99¢) |
|---|---|---|---|
| 450 kWh (half the average) | $57 | $683 | −$24 |
| 904 kWh (state average) | $114 | $1,372 | −$48 |
| 1,350 kWh (1.5× the average) | $171 | $2,049 | −$72 |
| 1,800 kWh (twice the average) | $228 | $2,732 | −$96 |
Idaho electricity through the year
The average Idaho home's bill peaked at about $153 in July 2026 and was lowest, about $92, in October 2025. Use ran from 737 kWh in October 2025 to 1,183 kWh in January 2026, 1.6 times as much.
The rate moved too, from 11.87¢ in December 2025 to 14.37¢ in June 2026. A monthly rate includes that month's fuel and seasonal charges, which is why the calculator uses the 12-month average for a yearly estimate.
| Month | Rate | Use per home | Bill per home |
|---|---|---|---|
| Aug 2025 | 12.08¢ | 992 kWh | $120 |
| Sep 2025 | 12.50¢ | 787 kWh | $98 |
| Oct 2025 | 12.46¢ | 737 kWh | $92 |
| Nov 2025 | 12.25¢ | 859 kWh | $105 |
| Dec 2025 | 11.87¢ | 1,060 kWh | $126 |
| Jan 2026 | 12.07¢ | 1,183 kWh | $143 |
| Feb 2026 | 12.63¢ | 944 kWh | $119 |
| Mar 2026 | 13.01¢ | 866 kWh | $113 |
| Apr 2026 | 12.70¢ | 763 kWh | $97 |
| May 2026 | 12.35¢ | 746 kWh | $92 |
| Jun 2026 | 14.37¢ | 794 kWh | $114 |
| Jul 2026 | 13.73¢ | 1,112 kWh | $153 |
Largest electricity providers in Idaho
Among the 10 largest providers listed, average residential rates in 2024 ran from 7.89¢ at United Electric Co-op, Inc to 12.21¢ at Kootenai Electric Cooperative. On the average Idaho home's 904 kWh that is a difference of $39 a month.
These are 2024 figures, the latest final year. The Idaho average was 11.52¢ that year and 12.65¢ over the last 12 months, up 10% — compare the providers with each other, not with today's average.
Together they serve 96% of Idaho's 868,141 residential customers. The rates are each company's residential revenue divided by kilowatt-hours sold, so customer charges are included; a plan or tier can still differ.
| Provider | Type | Homes served | Average rate | Use per home |
|---|---|---|---|---|
| Idaho Power Co | Investor-owned | 525,751 | 11.76¢ | 916 kWh/mo |
| Avista Corp | Investor-owned | 128,226 | 11.62¢ | 882 kWh/mo |
| PacifiCorp | Investor-owned | 74,170 | 12.11¢ | 899 kWh/mo |
| Kootenai Electric Cooperative | Cooperative | 30,378 | 12.21¢ | 1,131 kWh/mo |
| City of Idaho Falls | Municipal | 28,142 | 9.25¢ | 952 kWh/mo |
| Northern Lights, Inc | Cooperative | 18,511 | 11.49¢ | 1,083 kWh/mo |
| Fall River Rural Elec Coop Inc | Cooperative | 15,433 | 11.11¢ | 1,166 kWh/mo |
| United Electric Co-op, Inc | Cooperative | 5,100 | 7.89¢ | 1,646 kWh/mo |
| Salmon River Electric Coop Inc | Cooperative | 2,383 | 9.00¢ | 1,326 kWh/mo |
| Inland Power & Light Company | Cooperative | 2,115 | 8.92¢ | 1,455 kWh/mo |