Cost to Run a Electric Water Heater in Idaho
Idaho's average residential electricity rate is 13.7¢/kWh as of July 2026 — the 5th cheapest in the country, 25% below the U.S. average. At typical usage (2.9 hours/day), a electric water heater here costs $54.35 per month.
Per hour
$0.62
at 3,500–5,500 W
Per day
$1.79
2.9 hours/day
Per month
$54.35
397 kWh
Per year
$653
4,763 kWh
By usage level in Idaho
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (1.45 hrs/day) | $0.89 | $27.18 | $326 |
| Typical (2.9 hrs/day) | $1.79 | $54.35 | $653 |
| Heavy (5.8 hrs/day) | $3.58 | $109 | $1,305 |
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 13.7¢/kWh (July 2026), a electric water heater with typical usage costs about $1.79 per day, $54.35 per month, or $653 per year.
Is running a electric water heater in Idaho more expensive than average?
No — it's cheaper. Idaho's rate is about 25% below the U.S. average: $54.35 per month here versus $72.60 nationally.
What does electricity cost in Idaho right now?
Idaho residents pay an average of 13.7¢ per kWh as of July 2026 — the 5th cheapest rate of the 51 U.S. jurisdictions we track.