Hot Tub Running Costs: What It Costs Per Day and How to Cut It
About £1.90 a day.
Half with a heat pump.
That is what our product pages show for running a Comfort, Harmony or Lagoon hot tub, and £1.60 a day for our 32 amp tubs.1 This guide sets the figures out tub by tub, then shows you how to work out your own with your electricity rate.
A day of running a hot tub, in coins
Every hot tub page on our site shows what it costs to run in pounds per day.1 Our Comfort, Harmony and Lagoon come to around £1.90. Our 32 amp hot tubs come to around £1.60. With a heat pump, each is halved.
Running costs, tub by tub
These are the daily figures from each product page.1 Two things set them apart: the power supply the tub needs and whether a heat pump is added. Our 13 amp vs 32 amp guide explains the supply.
| Hot tub | Power supply | Per day | With a heat pump |
|---|---|---|---|
| Comfort | 13 amp | £1.90 | £0.95 |
| Harmony | 13 amp | £1.90 | £0.95 |
| Lagoon | 13 amp | £1.90 | £0.95 |
| Haven | 32 amp | £1.60 | £0.80 |
| Serenity | 32 amp | £1.60 | £0.80 |
| Sanctuary | 32 amp | £1.60 | £0.80 |
| Edge Kensington | 32 amp | £1.60 | £0.80 |
| Edge Knightsbridge | 32 amp | £1.60 | £0.80 |
Work out your own sum
Your electricity rate is on your bill. Ofgem’s price cap rate from 1 October 2026 is 26.32p per kWh on average.2
Power in kW × hours × your rate per kWh = cost
Each hot tub page lists its maximum power use, which is the most it draws when the heater, pumps and lights are all working at once.1 At 26.32p per kWh, one hour at that maximum costs:
| Hot tubs | Maximum power | One hour at maximum |
|---|---|---|
| Comfort | 2.15 kW | 57p |
| Lagoon | 2.35 kW | 62p |
| Haven, Serenity, Sanctuary | 4.75 kW | £1.25 |
| Edge Kensington and Knightsbridge | 7.7 kW | £2.03 |
That is the ceiling for an hour, not a typical hour. Use it to compare tubs on the same footing, and use the daily figures above for what to expect.
Keeping it low
Three things do most of the work.
Keep the cover on
The manual says to keep the hot tub covered whenever it is not in use, and to fit the cover tightly to get the most from its insulation.3
Add a heat pump
A heat pump halves the daily figure on our product pages.1 Our guides cover whether a heat pump is worth it and what size to choose, and you can browse our heat pumps.
Choose well-insulated
Our hot tubs have insulation directly under the shell, with a foil layer behind it, so warmth stays in the water.1 If you are still choosing, see the hot tub buying guide or browse our hot tubs.
Quick answers
Open a question to read the answer.
How much does it cost to run a hot tub per day?
Our product pages show around £1.90 a day for the Comfort, Harmony and Lagoon, and around £1.60 a day for the Haven, Serenity, Sanctuary and Edge hot tubs. With a heat pump, those come to around £0.95 and £0.80 a day.
How much does a hot tub cost to run per month?
Over 30 days, £1.90 a day comes to £57 and £1.60 a day to £48. With a heat pump that is £28.50 and £24.
How do I work out my own running cost?
Multiply the power in kW by the hours and by your rate per kWh. Your rate is on your electricity bill; Ofgem’s price cap rate from 1 October 2026 is 26.32p per kWh on average.
Does a heat pump reduce hot tub running costs?
Yes. On our product pages a heat pump halves the daily figure, from around £1.90 to £0.95 and from around £1.60 to £0.80.
Does water care cost extra?
Water care is shown separately on each product page: around £0.35 a day for the Comfort, Harmony and Lagoon, and around £0.40 a day for the other hot tubs.
Does keeping the cover on matter?
Yes. The manual says to keep the hot tub covered whenever it is not in use, fitted tightly to get the most from its insulation.
Sources
- Outdoor Living, hot tub product pages (“What it costs to run” and Specifications) for Comfort, Harmony, Lagoon, Haven, Serenity, Sanctuary, Edge Kensington and Edge Knightsbridge, outdoorlivinghottubs.co.uk, accessed 27 October 2026
- Ofgem, Changes to energy price cap between 1 October and 31 December 2026: electricity unit rate of 26.32 pence per kWh (average across England, Scotland and Wales), ofgem.gov.uk, accessed 27 October 2026
- Outdoor Living, Installation and user manual OLDMXSV2 for Outdoor Living hot tubs: using the cover, May 2025
Paul Margerison
Managing Director & Founder, Outdoor Living
I would always rather you saw the running costs before you buy. That is why every hot tub page shows them in pounds per day.