Infrared Sauna Running Costs UK 2026: Real Numbers Per Session
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Updated July 2026. The most common question we get before purchase: what will it actually cost me to run? Short answer — far less than most people expect. Here are the real numbers, worked through for every cabin size we sell, so you can budget before you buy.
The Quick Answer
A typical home infrared sauna session costs £0.40–£0.75 in electricity at average 2026 UK rates. Used four times a week, that's roughly £2–£3 per week, or around £100–£160 per year. A comparable traditional sauna costs three to four times as much to run.
How the Maths Works
Running cost = heater power (kW) × session length (hours) × your electricity unit rate (p/kWh). Infrared cabins draw far less power than traditional saunas because they heat your body directly rather than a large volume of air — most home cabins use 1.5–3 kW against a traditional heater's 6–10 kW. Infrared also pre-heats in 10–20 minutes instead of 45–60, so you pay for less warm-up time on top.
Cost Per Session by Cabin Size
Worked at a 45-minute session plus pre-heat, using an average UK unit rate. Your exact figure depends on your tariff — run your own numbers with our Sauna Running Cost Calculator.
| Cabin size | Typical draw | Cost per session | 4×/week, per year |
|---|---|---|---|
| 1 person | 1.5–1.8 kW | £0.35–£0.45 | £75–£95 |
| 2 person | 1.8–2.2 kW | £0.45–£0.55 | £95–£115 |
| 3 person | 2–2.5 kW | £0.50–£0.60 | £105–£125 |
| 4 person | 2.5–3 kW | £0.60–£0.75 | £125–£160 |
Infrared vs Traditional: The Running Cost Gap
A traditional Finnish-style sauna with a 6–9 kW heater typically costs £1.50–£2.50 per session once you include the longer heat-up, and more again for outdoor cabins in winter. Over a year of regular use, the gap is £300–£500. It's one of the main reasons infrared has become the default choice for indoor home installations — the full comparison is in our Infrared vs Traditional Sauna guide.
Five Ways to Cut the Cost Further
1. Use the pre-heat timer. App or timer-controlled cabins (like our GH Vision range) heat just before you arrive, so you never pay for an idle warm cabin. 2. Sauna indoors. An indoor cabin sits in an already-warm room, so there's almost no winter heat-up penalty — see our indoor infrared range. 3. Shift to off-peak. On time-of-use tariffs, an evening session at the off-peak rate can halve the cost. 4. Don't over-heat. Infrared works at 45–65°C — pushing the thermostat higher adds cost without adding benefit. 5. Keep panels unobstructed. Towels draped over heaters force longer sessions for the same effect.
What About Standby and Lighting?
Negligible — LED chromotherapy lighting and control panels draw a few watts. The heaters are effectively the entire running cost.
FAQs
How much does an infrared sauna cost to run per session in the UK?
Between £0.35 and £0.75 for a 45-minute session at average 2026 UK electricity rates, depending on cabin size. A compact 1-person cabin sits at the bottom of that range, a 4-person family cabin at the top.
How much does an infrared sauna add to your electricity bill?
Around £2–£3 per week with four sessions, or roughly £100–£160 per year. Daily use in a larger cabin might reach £250 per year.
Are infrared saunas cheaper to run than traditional saunas?
Yes — typically a third to a quarter of the cost. Infrared cabins draw 1.5–3 kW against a traditional heater's 6–10 kW, and pre-heat in a fraction of the time.
Do infrared saunas use a lot of electricity on standby?
No — standby draw is a few watts for the control panel. Essentially all the cost is incurred only while the heaters run.