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The true cost of running
a hot tub in the UK.
Real numbers — summer vs winter, with vs without a heat pump, plus a 5-year total cost of ownership table that compares inflatables, off-the-shelf rigid tubs and a properly-insulated Garden Hub build. No marketing fluff, no "from £1 a day" nonsense.
What's inside
Six pages of UK numbers, nothing else.
- /01 What a hot tub actually consumes. Daily kWh, monthly £, summer vs winter — at the current Ofgem cap baseline. Plus the inflatable-spa trap (they cost more, not less).
- /02 The heat-pump upgrade. What it actually costs vs saves — coefficient of performance figures, breakeven timeline, and the solar-PV bonus most owners miss.
- /03 Chemistry, filters, water. The fixed annual costs nobody quotes. Spoiler: cheaper than people expect, far less work than a pool.
- /04 5-year Total Cost of Ownership. The apples-to-apples table comparing inflatables, mid-spec rigid tubs, and a properly-insulated build with vs without the heat-pump bundle. The non-obvious finding will probably surprise you.
- /05 What makes running cost worse vs better. Six things to avoid, five things to do. Cover discipline alone is the difference between a £700/year tub and a £1,800/year tub.
Why we wrote it
Most running-cost figures online are either marketing-light ("from £1 a day!") or American (irrelevant to UK energy rates). We sell hot tubs and we install hot tubs and we get this question every week. So we wrote down the actual numbers — at the actual UK energy price cap, with the actual physics — and put them in a six-page PDF. If you read it and decide a hot tub isn't for you, that's fine; better you decide that with real data than buy something and resent the bill.