How Much Does It Cost to Run a Hot Tub per Day and Month?

Source: Planning watts of 300 and 24 hours a day, hours a day, using the average draw because the heater and pump cycle. Price: 17.23 cents per kWh, the 2025 US residential average from EIA Form EIA-861.

The monthly cost is 25% of the $150.68 average US electric bill. It runs all year, so the yearly cost is twelve times the monthly figure.

One figure cannot fit every home. These three cases show how much the answer moves with the equipment and the hours.

The lowest case costs $19 a month and the highest $75. Use the calculator above to match your own.

The same hot tub costs different amounts depending on the state, because the price per kWh differs. Here are the three cheapest states, the US average and the three costliest, for the same 219 kWh a month.

Source: U.S. Energy Information Administration, Form EIA-861 (final 2025 data). Price is residential revenue divided by sales and includes fixed charges.

See electricity rates in every state to find your own.

A hot tub holds water at temperature all day. Its electricity covers the heater, the circulation pump and sometimes jets, and most of the energy goes to replacing heat that escapes through the cover and the shell.

A well-insulated cover and a sheltered spot cut heat loss, and a lower set temperature in winter changes the cost a lot.

The range for this kind of appliance runs from about 150 to 600 watts. At 24 hours a day that is $19 to $75 a month, which is why checking the label on yours is worth the minute.

• Use a thick, tight-fitting cover and replace it when it gets waterlogged.
• Lower the temperature when you are away.
• Shelter the tub from wind.

Next step: Pool pump costs. For general ideas, read how to lower your electric bill.

Other appliances in the outdoor and extras group: Pool Pump, Dehumidifier, Humidifier, Aquarium.

The cost is watts divided by 1,000, times hours, times your price per kWh. The 300 watts is a planning figure for this kind of appliance, set from typical product ratings, and the 24 hours is an assumed day of use. Neither is copied from a federal table. Federal guidance describes the method and warns that real wattage varies, so we publish our own typical ranges and label them as such. Prices come from EIA Form EIA-861 for 2025.

The calculation is the standard one used in the U.S. Department of Energy's consumer guidance on estimating appliance energy use. Wattage varies by product age and features, so the label on your own appliance beats any average. Read more in our methodology.