Cost to Run a Tankless Electric Water Heater in Washington
Washington's average residential electricity rate is 14.7¢/kWh as of July 2026 — the 13th cheapest in the country, 20% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $56.31 per month.
Per hour
$2.65
at 13,000–27,000 W
Per day
$1.85
0.7 hours/day
Per month
$56.31
383 kWh
Per year
$676
4,599 kWh
By usage level in Washington
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.93 | $28.15 | $338 |
| Typical (0.7 hrs/day) | $1.85 | $56.31 | $676 |
| Heavy (1.4 hrs/day) | $3.70 | $113 | $1,352 |
Washington vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Washington?
At Washington's current average residential rate of 14.7¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $1.85 per day, $56.31 per month, or $676 per year.
Is running a tankless electric water heater in Washington more expensive than average?
No — it's cheaper. Washington's rate is about 20% below the U.S. average: $56.31 per month here versus $70.10 nationally.
What does electricity cost in Washington right now?
Washington residents pay an average of 14.7¢ per kWh as of July 2026 — the 13th cheapest rate of the 51 U.S. jurisdictions we track.