What is the monthly UK running cost of a hot tub?

Using the 26.11p per kWh Ofgem cap rate (1 July to 30 September 2026), maintaining a well-covered four to six person tub is approximately £16 to £27 monthly in summer or £47 to £78 in winter. Size, temperature, cover, weather and tariff change your bill, so these figures are examples rather than guarantees.

Does leaving a hot tub switched on cost less?

In most cases, yes. A modern tub is intended to remain powered, allowing its thermostat to replace only escaped heat. Bringing 1,200 litres up from cold needs about 39 kWh, around £10 at the current cap rate, normally exceeding savings between weekly uses. Turning down or off generally suits only rare summer bathing.

Which part of a hot tub consumes most electricity?

The heater is by far the largest user. Running costs mainly come from replacing warmth escaping through the shell and cover, making cover condition and temperature more influential than circulation or jets. Since a 2 kW jet pump operates only during use, half an hour costs about 26p.

What can reduce the cost of running my hot tub?

Renew any heavy, waterlogged cover and place a floating thermal blanket beneath it. Lower the setting by one degree, schedule lengthy filtration during off-peak periods on time-of-use tariffs, and balance the chemistry to avoid heating water that needs an early drain.

Are chemicals a major part of hot tub costs?

For most owners, electricity costs much more than chemicals; sanitiser, shock and balancers are typically only a few pounds monthly. Careful measurement limits spending because excess chemical is wasted and may require an early drain and reheat, consuming far more electricity.

How Much Does a Hot Tub Cost to Run in the UK?

Using the Ofgem energy price cap electricity rate of 26.11p per kWh for 1 July to 30 September 2026, these examples calculate hot tub operating costs. Assumptions accompany every result, including cold reheating, jet-pump use and summer or winter holding. The source is Ofgem.

Maintaining heat through summer: 52p to 91p per day (about £15.67 to £27.42 per month) - assumes A covered four to six person tub set at 38C in mild UK weather, requiring roughly 2 to 3.5 kWh of heater input each day
Maintaining heat through winter: £1.57 to £2.61 per day (about £47.00 to £78.33 per month) - assumes The identical covered tub during cold UK conditions, when increased heat loss requires roughly 6 to 10 kWh daily
Using jets while bathing: 26p per half hour of jets - assumes Operating a 2 kW jet pump for 30 minutes consumes 1 kWh, with that demand occurring only when jets run
Heating cold water again: about £10.18 per reheat from cold - assumes Raising 1,200 litres from 10C to 38C puts about 39 kWh into the water itself, excluding energy lost during heating