Cost to Run a Tankless Electric Water Heater in Massachusetts
Massachusetts's average residential electricity rate is 30.5¢/kWh as of July 2026 — the 48th cheapest in the country, 67% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $117 per month.
Per hour
$5.49
at 13,000–27,000 W
Per day
$3.84
0.7 hours/day
Per month
$117
383 kWh
Per year
$1,403
4,599 kWh
By usage level in Massachusetts
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.92 | $58.41 | $701 |
| Typical (0.7 hrs/day) | $3.84 | $117 | $1,403 |
| Heavy (1.4 hrs/day) | $7.69 | $234 | $2,805 |
Massachusetts 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 Massachusetts?
At Massachusetts's current average residential rate of 30.5¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $3.84 per day, $117 per month, or $1,403 per year.
Is running a tankless electric water heater in Massachusetts more expensive than average?
Yes. Massachusetts's electricity costs about 67% more than the U.S. average, so the same usage costs $117 per month here versus $70.10 nationally.
What does electricity cost in Massachusetts right now?
Massachusetts residents pay an average of 30.5¢ per kWh as of July 2026 — the 48th cheapest rate of the 51 U.S. jurisdictions we track.