Average Electric Bill in Idaho
Residential · 12-month average, September 2025 – August 2026.
That works out to about $1,389 a year. Among the 50 states and DC, Idaho has the 46th highest average residential bill.
Data current through August 2026 — the latest available from the U.S. EIA, which publishes monthly figures on a roughly two-month delay.
What makes up the bill
Price × usage = bill, exactly: 12.77¢/kWh × 907 kWh ≈ $116. A state can land high on either factor — Idaho sits close to the U.S. average on both.
Compared with nearby states
| Idaho | $116 | |
|---|---|---|
| U.S. average | $158 | |
| Washington | $132 | |
| Oregon | $131 | |
| Nevada | $122 | |
| Wyoming | $115 | |
| Montana | $115 | |
| Utah | $105 |
Idaho is $43 a month below (-26.9%) the U.S. average of $158. Neighboring states share fuel mixes, weather, and often a grid operator, which makes them a closer benchmark than the national average.
Trend since 2008
Each point is a trailing 12-month average, which strips out the summer/winter swing and leaves the underlying trend. Bills start in January 2008 because that is when EIA began reporting customer counts.
Seasonal swing
- Highest month
- $153
- July 2026
- Lowest month
- $92
- October 2025
- Swing
- $61
- peak minus low
- Latest month
- $137
- August 2026
Actual bills are far from flat: Idaho peaks in July 2026 and bottoms out in October 2025. The headline figure above is the average across all twelve months.
Idaho electricity bills in context
Idaho's average monthly electricity bill was $116 from September 2025 to August 2026, ranking 46th most expensive of the 50 states and DC. This stands $42 below the national average of $158. Over the past year, the bill rose 5.2%, from $110 in the prior twelve-month period. Over the longer run, it has climbed 18% since August 2021 and 52.3% since December 2008.
Idaho's rate of 12.77¢/kWh runs well below the national average of 18.07¢/kWh, a difference of 5.30¢/kWh. Homes here use slightly more electricity than the national average—907 kWh per month against 876—which works upward on the bill, but the lower rate works downward by a larger measure. The bill swings seasonally from a low of $92 in October 2025 to a peak of $153 in July 2026, a spread of $61 around the twelve-month average.
Among Idaho's neighbours, Wyoming and Montana tie at $115 per month, just below Idaho's bill. Utah comes in lower at $105, while Washington, Oregon, and Nevada all run higher, ranging from $122 to $132.
Written from the EIA figures on this page, covering data through August 2026.
Frequently asked questions
›How much is the average electric bill in Idaho?
›Is the electric bill in Idaho higher than the national average?
›Why is electricity relatively cheap in Idaho?
›When is the electric bill highest in Idaho?
›How does Idaho compare with neighboring states?
How this is calculated
EIA’s retail-sales dataset reports, for every state and month, total residential revenue and the number of residential customers served. The average monthly bill is simply the first divided by the second — total spending across all households, spread evenly over all accounts.
bill = revenue ÷ customers · averaged over 12 months (September 2025 – August 2026)
Two caveats worth knowing. It is an average, so it blends apartments with large houses — a typical household in Idaho may pay well above or below $116. And it counts what was actually billed for electricity, including fixed service charges, so it is not the same as multiplying your own usage by the advertised rate.
Looking for the rate rather than the bill? See Idaho electricity prices by sector.