Cost to Run a Electric Water Heater in Idaho
Idaho's average residential electricity rate is 12.7¢/kWh as of April 2026 — the 2nd cheapest in the country, 32% below the U.S. average. At typical usage (2.9 hours/day), a electric water heater here costs $50.38 per month.
Per hour
$0.57
at 3,500–5,500 W
Per day
$1.66
2.9 hours/day
Per month
$50.38
397 kWh
Per year
$605
4,763 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.45 hrs/day) | $0.83 | $25.19 | $302 |
| Typical (2.9 hrs/day) | $1.66 | $50.38 | $605 |
| Heavy (5.8 hrs/day) | $3.31 | $101 | $1,210 |
Idaho vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a electric water heater in Idaho?
At Idaho's current average residential rate of 12.7¢/kWh (April 2026), a electric water heater with typical usage costs about $1.66 per day, $50.38 per month, or $605 per year.
Is running a electric water heater in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 32% below the U.S. average: $50.38 per month here versus $74.58 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 12.7¢ per kWh as of April 2026 — the 2nd cheapest rate of the 51 U.S. jurisdictions we track.