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How Much Does It Cost to Run a Hot Tub in California? (2026)
A hot tub heater runs several hours a day to maintain temperature, and the circulation pump runs much longer. Inflatable hot tubs are the most expensive to run because they lose heat quickly through thin walls.
A typical hot tub (3,000 W) costs $1.05 per hour, or about $126.00 per month at 4 hours a day in California. Expensive to run
| Wattage | Per hour | Per day | Per month | Per year |
|---|---|---|---|---|
| Low (1,500 W) | $0.52 | $2.10 | $63.00 | $766.50 |
| Typical (3,000 W) | $1.05 | $4.20 | $126.00 | $1,533 |
| High (6,000 W) | $2.10 | $8.40 | $252.00 | $3,066 |
Formula: watts ÷ 1000 × hours × price per kWh. Typical use is 4 h/day ≈ 4,380 kWh per year.
In California, with electricity at $0.35 per kWh (source: EIA Table 5.6.A, 2026-06), a typical hot tub costs $1.05 per hour and about $1,533 per year at 4 hours a day. That is about 94% more than the US national average of $64.80 per month, because electricity in California costs $0.35 per kWh against $0.18 nationally. Each $1.00 of electricity buys roughly 1.0 hours of use.
How to lower the cost of running a hot tub
- Keep the insulated cover on whenever the tub is not in use. Most heat escapes through the water surface.
- Lower the set temperature by a few degrees between uses.
- Place the tub out of the wind or add a windbreak.
- Inflatable tubs can use two to three times the electricity of a hard-shell model.
In standby it draws about 100 W, which adds roughly 876 kWh ($306.60) per year if it is never unplugged.
Frequently asked questions
How much does a hot tub add to the electricity bill?
Commonly 3 to 8 kWh a day in mild weather and much more in winter, so it can be one of the largest household loads.
Is it cheaper to keep a hot tub on all the time?
For regular use, yes. Reheating from cold uses more than maintaining temperature under a good cover.
How much does an inflatable hot tub cost to run?
Often 8 to 15 kWh a day because of poor insulation, especially outdoors in cool weather.
Compare with
Cost by region
- United States (average)
- California
- Texas
- New York
- Florida
- Canada (average)
- United Kingdom
- Germany
- France
- Australia
- India