2-person inflatable hot tub running cost — Daily evening soak (1 h)
Switched on for an hour each evening — the most energy-intensive regular use. A 2-person inflatable hot tub (800 W heater + 800 W pump) costs approximately £6.29/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
2-person inflatable hot tub — Daily evening soak (1 h): Active: 1.60 kWh (1 h × 1.6 kW). Standby: 1.84 kWh (23.0 h × 0.8 kW × 10%). Total/day: 3.44 kWh = 89.8p. Weekly (7 days): £6.29. Annual: £326.94. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).
- Per day (used)
- 89.8p
- Per week (7 days)
- £6.29
- Per month
- £27.24
- Per year
- £326.94
Tub specification
- Seats
- 2 adults
- Heater
- 800 W
- Pump
- 800 W
- Active use
- 1 h/day
- Standby load
- 10% of heater
- Days used/week
- 7
Lay-Z-Spa Miami / Coleman SaluSpa published specs (2024): 800 W heater + 800 W blower motor
How the cost is worked out
- Active use: (800 W + 800 W) ÷ 1000 × 1 h = 1.60 kWh.
- Standby: 800 W ÷ 1000 × 23.0 h × 10% = 1.84 kWh.
- Daily total: 1.60 + 1.84 = 3.44 kWh × 26.11p = 89.8p.
- Weekly: 89.8p × 7 days = £6.29.
- Annual: £6.29 × 52 = £326.94.
Same scenario — other tub sizes
Track hot tub running costs
Updated each time the Ofgem cap changes.
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Heater and pump specs from Which? — How much does a hot tub cost to run (electricity consumption data). Unit rate 26.11p/kWh from Ofgem — Energy price cap unit rates and standing charges (1 July to 30 September 2026), OGL v3.0.