By the SaunaKitsUK.co.uk — The UK's Home Sauna Buying Guide Team · Updated May 2026 · Independent, reader-supported

How Much Does a Home Sauna Cost to Run in the UK? Electricity Bills Explained

Running a sauna at home isn't a zero-cost luxury, but it's not ruinously expensive either—if you choose the right kit and run it sensibly. The real cost depends on three things: the sauna's power output, your electricity tariff, and how often you use it. Let's break down the numbers so you can make an informed decision.

Understanding sauna power consumption

Home sauna kits come in two main types, and they use electricity very differently.

Infrared saunas typically draw between 1.5 and 3 kW. A mid-range model—say, 2 kW—heats to 40–60°C in 15–20 minutes and runs quietly. They're gentler on household circuits and often require no special wiring beyond a standard 13-amp socket. Smaller 1.5 kW models are even more efficient.

Traditional electric saunas (dry or steam) need more grunt. A compact 3–4 kW model for a home is common; larger ones run 6–9 kW or higher. These need dedicated circuits and often require an electrician's input. They heat faster and hit higher temperatures—up to 90°C+—but they're hungrier for power.

The wattage difference matters enormously when you're calculating running costs. A 3 kW sauna uses twice as much electricity per hour as a 1.5 kW one.

Current UK electricity rates

As of mid-2026, typical UK domestic electricity rates sit around 24–28 pence per kilowatt-hour (kWh), depending on your supplier and tariff. Some households on fixed deals pay less; those on standard variable rates or without a fixed contract often pay more. For this calculation, we'll use 26p per kWh as a realistic middle estimate.

If your tariff differs, you can adjust the numbers below proportionally—it's a simple multiplication.

Running cost calculations

Here's where the real picture emerges.

An infrared sauna at 2 kW:

• 1 hour of use = 2 kWh × 26p = 52p
• 3 times a week (3 hours total) = £1.56 per week, roughly £81 per year
• Daily use (1 hour) = £190 per year

A 1.5 kW infrared sauna (smaller or more efficient model):

• 1 hour of use = 1.5 kWh × 26p = 39p
• 3 times a week = £1.17 per week, roughly £61 per year
• Daily use = £142 per year

A traditional electric sauna at 4 kW:

• 1 hour of use = 4 kWh × 26p = £1.04
• 3 times a week = £3.12 per week, roughly £162 per year
• Daily use = £380 per year

A larger traditional sauna at 6 kW:

• 1 hour of use = 6 kWh × 26p = £1.56
• 3 times a week = £4.68 per week, roughly £243 per year
• Daily use = £570 per year

These figures assume standard household tariffs. Off-peak rates (Economy 7 or equivalent) could cut costs by 10–15% if you're disciplined about timing, though few people actually run a sauna at 2 a.m.

How to reduce running costs

Use a timer. Infrared saunas reach optimal temperature in 15–20 minutes; traditional ones in 20–30. You don't need to run them longer, and a programmer socket or built-in timer prevents wasteful overheating.

Insulation matters. Saunas lose heat through gaps and poor door seals. Check that your kit has thermal insulation rated to at least 100 mm. A sauna in an unheated garage will work harder and cost more to run than one in a utility room with ambient warmth.

Keep it smaller. A 2-person infrared cabin costs far less to run than a 4-person traditional sauna—and unless you're entertaining, you won't need the space.

Choose infrared over traditional if cost is your priority. The power draw difference is dramatic. A 2 kW infrared running three times weekly costs roughly one-third of a 6 kW traditional sauna on the same schedule.

Maintain your kit. Clean heater elements and check door gaskets every few months. A leaking sauna door or blocked heater has to work harder, pushing up consumption.

Which sauna kits are most efficient

If running costs matter to you, prioritise:

• 1.5–2 kW infrared cabins from established brands (these are tested and reliable; cheap imports often under-specify their true power draw)
• Kits with thermostatic controls, which prevent the heater cycling on and off unnecessarily
• Saunas rated for your space. A 1-person infrared pod for a small bathroom costs less to run than a 4-person cabin you never fully use
• Models with cedar or hemlock construction, which insulates better than thin plywood

An entry-level 1.5 kW infrared sauna—roughly £1,500–£2,500 installed—will cost you around £60–150 per year to run at typical household usage. A mid-range 2 kW model, maybe £2,500–£4,000, sits at £80–190 annually. That's manageable for most household budgets.

By contrast, a traditional sauna—even a compact one—easily runs to £150–400+ per year, with larger models pushing towards £600 or more. The difference compounds over years.

Your actual bill depends on your usage pattern and local tariff, but these calculations give you a realistic baseline. Choose a kit sized to your actual needs, watch your usage, and the running costs needn't be a barrier to enjoying a home sauna.