Idaho vs Montana: Electricity Rates & Average Bills
Side-by-side residential bills, cents-per-kWh, usage and 12-month trends — June 2026 EIA data.
Data through June 2026
EIA-826, verified Oct 11, 2026
The average residential bill in Idaho ($114.05/mo) runs $11.61/mo (11%) higher than Montana ($102.44/mo).
Idaho bill$114.05/mo#47 highest of 51
Montana bill$102.44/mo#51 highest of 51
US context$164.05/mostates median
The numbers, side by side
Latest month from EIA residential retail-sales data, plus each state's rank among tracked states.
| Measure | Idaho | Montana |
|---|---|---|
| Avg monthly bill | $114.05 | $102.44 |
| Price per kWh | 14.37¢ | 15.14¢ |
| Typical usage | 794 kWh/mo | 677 kWh/mo |
| Bill rank | Highest: #47 · Price: #42 | Highest: #51 · Price: #36 |
| Bill, 12-mo change | −12.3% | −12.8% |
Idaho bill trend
Average residential bill, last 12 months.
Montana bill trend
Average residential bill, last 12 months.
Common questions
Is Idaho or Montana more expensive for electricity?
Idaho is — the average residential bill there is $11.61/month higher than Montana's ($102.44/month).
How much bigger is Idaho's bill than Montana's?
About 11% higher — $114.05 vs $102.44 per month in the latest EIA data.
Bill = residential revenue ÷ customers; price = revenue ÷ sales. See the methodology and each state's page: Idaho · Montana.