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Hot Tub · Ofgem 1 July to 30 September 2026

6-person hard-shell hot tub running cost — Twice a week (2 h each)

Two 2-hour sessions per week — popular for couples or families. A 6-person hard-shell hot tub (6,000 W heater + 2,000 W pump) costs approximately £15.25/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

6-person hard-shell hot tub — Twice a week (2 h each): Active: 16.00 kWh (2 h × 8.0 kW). Standby: 13.20 kWh (22.0 h × 6.0 kW × 10%). Total/day: 29.20 kWh = £7.62. Weekly (2 days): £15.25. Annual: £792.91. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£7.62
Per week (2 days)
£15.25
Per month
£66.08
Per year
£792.91

Tub specification

Seats
6 adults
Heater
6,000 W
Pump
2,000 W
Active use
2 h/day
Standby load
10% of heater
Days used/week
2

Hydropool / Jacuzzi 6-person hard-shell: 6 kW heater + 2 kW pump (Which? 2024)

How the cost is worked out

  1. Active use: (6,000 W + 2,000 W) ÷ 1000 × 2 h = 16.00 kWh.
  2. Standby: 6,000 W ÷ 1000 × 22.0 h × 10% = 13.20 kWh.
  3. Daily total: 16.00 + 13.20 = 29.20 kWh × 26.11p = £7.62.
  4. Weekly: £7.62 × 2 days = £15.25.
  5. Annual: £15.25 × 52 = £792.91.

Same scenario — other tub sizes

2-person inflatable hot tub: £2.59/wk4-person inflatable hot tub: £4.86/wk4-person hard-shell hot tub: £8.15/wk

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.