Cost to Run a Tankless Electric Water Heater in Washington
Washington's average residential electricity rate is 14.4¢/kWh as of April 2026 — the 12th cheapest in the country, 23% below the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $55.16 per month.
Per hour
$2.59
at 13,000–27,000 W
Per day
$1.81
0.7 hours/day
Per month
$55.16
383 kWh
Per year
$662
4,599 kWh
By usage level in Washington
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $0.91 | $27.58 | $331 |
| Typical (0.7 hrs/day) | $1.81 | $55.16 | $662 |
| Heavy (1.4 hrs/day) | $3.63 | $110 | $1,325 |
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 14.4¢/kWh (April 2026), a tankless electric water heater with typical usage costs about $1.81 per day, $55.16 per month, or $662 per year.
Is running a tankless electric water heater in Washington more expensive than average?
No — it's cheaper. Washington's rate is about 23% below the U.S. average: $55.16 per month here versus $72.01 nationally.
What does electricity cost in Washington right now?
Washington residents pay an average of 14.4¢ per kWh as of April 2026 — the 12th cheapest rate of the 51 U.S. jurisdictions we track.