Independent resource. Not affiliated with any utility or energy provider. Data sourced from the U.S. Energy Information Administration.Verified June 2026
Idaho Electricity Cost 2026: 12.70¢/kWh
Idaho residential electricity rates average 12.70 cents per kWh in 2026, -32.6% vs the 18.83¢ US national average. The state operates a regulated retail market with hydroelectric as the primary generation source.
State Rate
12.70
cents/kWh
Monthly Bill
$110
at 863 kWh
vs National
-32.6%
national avg 18.83¢
Rank (cheapest first)
2/50
YoY change +6.8%
Market Type
Regulated
Supply rate set by state PUC
Primary Generation
Hydroelectric
per EIA State Energy Profile
Annual Bill (avg usage)
$1,315
vs national $1,950
Idaho electricity market
Regulated state with some of the cheapest residential electricity in the US (second only to North Dakota as of March 2026), driven by abundant hydroelectric generation via the Bonneville Power Administration system. Idaho Power is the dominant utility serving southern Idaho, with Avista in the north and Rocky Mountain Power in the southeast.
Where Idaho residents save
No retail competition. Low rates mean the savings opportunity is modest compared to high-rate states; the biggest residential lever is efficiency improvements that compound across the heating season (insulation, heat-pump conversion from electric resistance).
Primary utilities
- Idaho Power
- Avista Utilities
- Rocky Mountain Power
Idaho bill estimates by usage
| Home Profile | Monthly kWh | Monthly Bill | Annual Bill |
|---|---|---|---|
| Apartment | 500 | $64 | $762 |
| Small house | 750 | $95 | $1,143 |
| Average household | 863 | $110 | $1,315 |
| Large house | 1200 | $152 | $1,829 |
| Large house + EV | 1500 | $191 | $2,286 |
Estimates use the Idaho state-average rate of 12.70¢/kWh from EIA data. Your actual bill includes delivery charges, customer-service fees, and state/local taxes already blended into this retail rate, plus any locality-specific surcharges not captured at the state-average level.