ID · ranked #51 in the US
Idaho residential rate: 11.3¢/kWh
That's 32% lower than the US average of 16.5¢/kWh. Columbia River hydropower keeps rates the lowest in the nation; dual-peak grid with summer cooling in the Treasure Valley and winter heating in the mountains.
Estimated cost
$38.14/month
$1.27 per day$464.01 per year337.5 kWh monthly
W
A space heater draws full power only while the thermostat/compressor is running — about 7.5 effective hours at 1500W across your 10-hour window.
At your rate
What appliances cost in Idaho.
Typical monthly running cost at 11.3¢/kWh, sorted by biggest impact on your bill.
Utilities serving Idaho
- Idaho Power
- Avista Utilities
- Rocky Mountain Power
Deregulation status
none
In Idaho your utility is both the supplier and the deliverer. No supplier shopping, but regulated rates tend to be more stable.
Sources: www.eia.gov · puc.idaho.gov
Last updated: 2026-04-13