Cost to Run a Heat Pump Water Heater in Idaho
Idaho's average residential electricity rate is 12.4¢/kWh as of May 2026 — the 1st cheapest in the country, 33% below the U.S. average. At typical usage (3 hours/day), a heat pump water heater here costs $11.31 per month.
Per hour
$0.12
at 400–1,500 W
Per day
$0.37
3 hours/day
Per month
$11.31
91 kWh
Per year
$136
1,095 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.5 hrs/day) | $0.19 | $5.65 | $67.89 |
| Typical (3 hrs/day) | $0.37 | $11.31 | $136 |
| Heavy (6 hrs/day) | $0.74 | $22.62 | $272 |
Idaho vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a heat pump water heater in Idaho?
At Idaho's current average residential rate of 12.4¢/kWh (May 2026), a heat pump water heater with typical usage costs about $0.37 per day, $11.31 per month, or $136 per year.
Is running a heat pump water heater in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 33% below the U.S. average: $11.31 per month here versus $16.78 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 12.4¢ per kWh as of May 2026 — the 1st cheapest rate of the 51 U.S. jurisdictions we track.