6-person hard-shell hot tub running cost — Standby / maintain temperature only
Tub is kept hot but not used — standby heating cost only. A 6-person hard-shell hot tub (6,000 W heater + 2,000 W pump) costs approximately £26.32/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).
6-person hard-shell hot tub — Standby / maintain temperature only: Active: 0.00 kWh (0 h × 8.0 kW). Standby: 14.40 kWh (24.0 h × 6.0 kW × 10%). Total/day: 14.40 kWh = £3.76. Weekly (7 days): £26.32. Annual: £1368.58. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).
- Per day (used)
- £3.76
- Per week (7 days)
- £26.32
- Per month
- £114.05
- Per year
- £1368.58
Tub specification
- Seats
- 6 adults
- Heater
- 6,000 W
- Pump
- 2,000 W
- Active use
- 0 h/day
- Standby load
- 10% 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 × 0 h = 0.00 kWh.
- Standby: 6,000 W ÷ 1000 × 24.0 h × 10% = 14.40 kWh.
- Daily total: 0.00 + 14.40 = 14.40 kWh × 26.11p = £3.76.
- Weekly: £3.76 × 7 days = £26.32.
- Annual: £26.32 × 52 = £1368.58.
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.