How much does an electric water heater cost per month in New Hampshire?

About $80.62 a month, assuming 3,500 kWh a year at 27.64¢/kWh.

How many kilowatt-hours does an electric water heater use?

Roughly 3,500 kWh a year under these assumptions.

Is that expensive compared with other states?

New Hampshire has the 8th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $636 a year.

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Cost to run an electric water heater in New Hampshire (August 2026 rates)

At 27.64¢ per kilowatt-hour — New Hampshire's average residential price in August 2026 — running an electric water heater costs $967 a year. That is 52% more than the national average of $636. New Hampshire's residential rate is up 13.1% from August 2025, which moves this appliance from $855 to $967 a year.

Per day: $2.65
Per month: $80.62
Per year: $967

Assumption: 3,500 kWh a year. A 50-gallon resistance tank for a household of three or four. This is typically the largest or second-largest electric load in a home without electric heat. Use the calculator to swap in the numbers from your own model.

Related calculators: work out whether a heat-pump water heater pays back.

How New Hampshire compares

New Hampshire pays 27.64¢/kWh, the 8th most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $332 more a year than the typical U.S. household pays for the same use. Running the same electric water heater costs $445 a year in Nevada and $1,651 in Hawaii, so where you live changes this bill by $1,206 a year.

State	Rate	Per month	Per year
New Jersey	24.61¢	$71.78	$861
District of Columbia	25.98¢	$75.78	$909
New Hampshire	27.64¢	$80.62	$967
Rhode Island	28.18¢	$82.19	$986
New York	28.65¢	$83.56	$1,003

States ranked by average residential price, cheapest first. See all 51 states for an electric water heater.

What else costs about the same in New Hampshire

Electric car$1,050 a year in NH Hot tub$691 a year in NH Central air conditioner$650 a year in NH

Cutting the number down

A heat-pump water heater does the same job for roughly a third of the electricity, which is why it usually pays back faster than any other upgrade in the house.
Dropping the setpoint from 140 F to 120 F cuts standby losses and scalding risk at once.
An insulating blanket on an older tank pays for itself in a season; check the manufacturer's guidance first.

Questions

How much does an electric water heater cost per month in New Hampshire?: About $80.62 a month, assuming 3,500 kWh a year at 27.64¢/kWh.
How many kilowatt-hours does an electric water heater use?: Roughly 3,500 kWh a year under these assumptions.
Is that expensive compared with other states?: New Hampshire has the 8th most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $636 a year.