2-person inflatable hot tub running cost — Winter daily use (1.5 h, tub covered)
Winter daily use with a good insulating cover: higher maintenance fraction (15%) due to cold ambient temperature. A 2-person inflatable hot tub (800 W heater + 800 W pump) costs approximately £9.32/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
2-person inflatable hot tub — Winter daily use (1.5 h, tub covered): Active: 2.40 kWh (1.5 h × 1.6 kW). Standby: 2.70 kWh (22.5 h × 0.8 kW × 15%). Total/day: 5.10 kWh = £1.33. Weekly (7 days): £9.32. Annual: £484.71. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).
- Per day (used)
- £1.33
- Per week (7 days)
- £9.32
- Per month
- £40.39
- Per year
- £484.71
Tub specification
- Seats
- 2 adults
- Heater
- 800 W
- Pump
- 800 W
- Active use
- 1.5 h/day
- Standby load
- 15% 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 × 1.5 h = 2.40 kWh.
- Standby: 800 W ÷ 1000 × 22.5 h × 15% = 2.70 kWh.
- Daily total: 2.40 + 2.70 = 5.10 kWh × 26.11p = £1.33.
- Weekly: £1.33 × 7 days = £9.32.
- Annual: £9.32 × 52 = £484.71.
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.