Hot Tub vs Electric Sauna Heater: Which Costs More to Run? (2026)
Over a month, a hot tub usually costs more than a sauna even though the sauna draws far more power. A sauna runs an hour per session and is off otherwise; a hot tub heats and circulates water around the clock to stay ready. Three sauna sessions a week use about 80 kWh a month, while a hot tub kept hot uses 150 to 300 kWh, more in winter.
At the hours shown, Hot Tub costs about $788.40 per year and Electric Sauna Heater about $394.20 in United States (average).
| Appliance | Typical watts | Hours / day | Per hour | Per month | Per year |
|---|---|---|---|---|---|
| Hot Tub | 3,000 W | $0.54 | $64.80 | $788.40 | |
| Electric Sauna Heater | 6,000 W | $1.08 | $32.40 | $394.20 |
Edit the hours to match your own use. Costs use the typical wattage of each appliance.
When the hot tub makes sense
- You use it most days so the standing cost is spread over many sessions
- You have a well-insulated hard-shell tub with a good cover
- You want a long soak rather than a short hot session
When the electric sauna heater makes sense
- You use it a few times a week
- You want the lowest monthly cost
- Winter running cost matters
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