6-person hard-shell 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 6-person hard-shell hot tub (6,000 W heater + 2,000 W pump) costs approximately £58.94/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
6-person hard-shell hot tub — Winter daily use (1.5 h, tub covered): Active: 12.00 kWh (1.5 h × 8.0 kW). Standby: 20.25 kWh (22.5 h × 6.0 kW × 15%). Total/day: 32.25 kWh = £8.42. Weekly (7 days): £58.94. Annual: £3065.05. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).
- Per day (used)
- £8.42
- Per week (7 days)
- £58.94
- Per month
- £255.42
- Per year
- £3065.05
Tub specification
- Seats
- 6 adults
- Heater
- 6,000 W
- Pump
- 2,000 W
- Active use
- 1.5 h/day
- Standby load
- 15% of heater
- Days used/week
- 7
Hydropool / Jacuzzi 6-person hard-shell: 6 kW heater + 2 kW pump (Which? 2024)
How the cost is worked out
- Active use: (6,000 W + 2,000 W) ÷ 1000 × 1.5 h = 12.00 kWh.
- Standby: 6,000 W ÷ 1000 × 22.5 h × 15% = 20.25 kWh.
- Daily total: 12.00 + 20.25 = 32.25 kWh × 26.11p = £8.42.
- Weekly: £8.42 × 7 days = £58.94.
- Annual: £58.94 × 52 = £3065.05.
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.