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

About $70.02 a month, assuming 2,500 kWh a year at 33.61¢/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?

California has the 2nd 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 California (July 2026 rates)

At 33.61¢ per kilowatt-hour — California's average residential price in July 2026 — running a hot tub costs $840 a year. That is 84% more than the national average of $458. California's residential rate is up 2.9% from July 2025, which moves this appliance from $816 to $840 a year.

Per day: $2.30
Per month: $70.02
Per year: $840

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 California compares

California pays 33.61¢/kWh, the 2nd most expensive residential electricity of the 51 U.S. jurisdictions EIA reports. For this appliance that works out to $383 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 California

Central air conditioner$791 a year in CA Heat pump$726 a year in CA Pool pump$581 a year in CA

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 California?: About $70.02 a month, assuming 2,500 kWh a year at 33.61¢/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?: California has the 2nd most expensive average residential rate in the country, so this appliance costs more here than the U.S. average of $458 a year.