How much does a hot tub cost per month in Hawaii?

About $100 a month, assuming 2,500 kWh a year at 48.00¢/kWh.

How many kilowatt-hours does a hot tub use?

Roughly 2,500 kWh a year under these assumptions.

Is that expensive compared with other states?

Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $458 a year.

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Cost to run a hot tub in Hawaii (July 2026 rates)

At 48.00¢ per kilowatt-hour — Hawaii's average residential price in July 2026 — running a hot tub costs $1,200 a year. That is 162% more than the national average of $458. Hawaii's residential rate is up 22.0% from July 2025, which moves this appliance from $984 to $1,200 a year.

Per day: $3.29
Per month: $100
Per year: $1,200

Assumption: 2,500 kWh a year. A well-insulated 400-gallon tub held at 100 F year-round in a moderate climate. A poorly insulated tub in a cold climate can double this. Use the calculator to swap in the numbers from your own model.

How Hawaii compares

Hawaii pays 48.00¢/kWh, the most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $742 more a year than the typical U.S. household pays for the same use. Running the same hot tub costs $318 a year in Louisiana and $1,200 in Hawaii, so where you live changes this bill by $882 a year.

State	Rate	Per month	Per year
New York	29.90¢	$62.29	$748
Massachusetts	30.49¢	$63.52	$762
Maine	32.41¢	$67.52	$810
California	33.61¢	$70.02	$840
Hawaii	48.00¢	$100	$1,200

States ranked by average residential price, cheapest first. See all 51 states for a hot tub.

What else costs about the same in Hawaii

Central air conditioner$1,129 a year in HI Heat pump$1,037 a year in HI Pool pump$829 a year in HI

Cutting the number down

A good cover is the whole ballgame. Most of the energy replaces heat lost from the surface, not heat delivered to people.
Holding temperature usually beats cooling down and reheating, because reheating a large mass of water is expensive.
A waterlogged cover has lost its insulation value and quietly doubles the standing loss.

Questions

How much does a hot tub cost per month in Hawaii?: About $100 a month, assuming 2,500 kWh a year at 48.00¢/kWh.
How many kilowatt-hours does a hot tub use?: Roughly 2,500 kWh a year under these assumptions.
Is that expensive compared with other states?: Hawaii has the most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $458 a year.