Sauna, Hot Tub and Ice Bath Running Costs (UK)

Energy used = power in kW × hours × share of time the heater or chiller is actually on. Cost = energy × your electricity price. Enter your own numbers, or start from a model in our listings.

1. The device Pick a model (optional) 256 listings state their power. Power (kW) Rated power from the product page. Starting value: median of 172 UK sauna listings.

2. How you use it Hours per use (including warm-up) Uses per week For a hot tub or chiller that runs all day, enter 24 hours and 7 uses. Share of time at full power (%) 100 % is the upper limit. Thermostats switch heaters and chillers off once they reach temperature, so real use is lower; the product page or manual may state a figure.

3. Electricity price Unit rate (pence per kWh) Ofgem price cap, average for Direct Debit in England, Scotland and Wales, 1 July 2026 to 30 September 2026. Your tariff may differ.

Per use: -

Per month: - · per year: - · energy per year: -

Electricity only. Standing charges, water, chemicals, wood, installation and maintenance are not included.

One hour at full power, by device

Median power of the listings that state it, and the cost of one hour at that power at the current price cap (26.11p per kWh) and the next one from 1 October 2026 (26.32p).

Device	Listings with power	Median power	1 hour now	1 hour from 1 October 2026
Sauna	172	6 kW	£1.57	£1.58
Hot tub	77	3 kW	£0.78	£0.79
Cold plunge	7	0.87 kW	£0.23	£0.23

Ofgem: "There is no VAT on electricity from 1 October 2026 to 31 March 2027."