4-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 4-person inflatable hot tub (1,500 W heater + 1,500 W pump) costs approximately £11.79/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
4-person inflatable hot tub — Daily evening soak (1 h): Active: 3.00 kWh (1 h × 3.0 kW). Standby: 3.45 kWh (23.0 h × 1.5 kW × 10%). Total/day: 6.45 kWh = £1.68. Weekly (7 days): £11.79. Annual: £613.01. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).
- Per day (used)
- £1.68
- Per week (7 days)
- £11.79
- Per month
- £51.08
- Per year
- £613.01
Tub specification
- Seats
- 4 adults
- Heater
- 1,500 W
- Pump
- 1,500 W
- Active use
- 1 h/day
- Standby load
- 10% of heater
- Days used/week
- 7
Lay-Z-Spa Paris / Bestway 4-person published specs (2024): 1,500 W heater + 1,500 W blower
How the cost is worked out
- Active use: (1,500 W + 1,500 W) ÷ 1000 × 1 h = 3.00 kWh.
- Standby: 1,500 W ÷ 1000 × 23.0 h × 10% = 3.45 kWh.
- Daily total: 3.00 + 3.45 = 6.45 kWh × 26.11p = £1.68.
- Weekly: £1.68 × 7 days = £11.79.
- Annual: £11.79 × 52 = £613.01.
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.