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Hot Tub · Ofgem 1 July to 30 September 2026

6-person hard-shell hot tub running cost — Economy mode (heat off overnight)

Heat is switched off overnight and back on in the morning — reduces standby cost but uses more to reheat. A 6-person hard-shell hot tub (6,000 W heater + 2,000 W pump) costs approximately £38.02/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

6-person hard-shell hot tub — Economy mode (heat off overnight): Active: 16.00 kWh (2 h × 8.0 kW). Standby: 13.20 kWh (22.0 h × 6.0 kW × 10%). Total/day: 20.80 kWh = £5.43. Weekly (7 days): £38.02. Annual: £1976.84. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£5.43
Per week (7 days)
£38.02
Per month
£164.74
Per year
£1976.84

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
7

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 = 20.80 kWh × 26.11p = £5.43.
  4. Weekly: £5.43 × 7 days = £38.02.
  5. Annual: £38.02 × 52 = £1976.84.

Same scenario — other tub sizes

2-person inflatable hot tub: £7.02/wk4-person inflatable hot tub: £13.16/wk4-person hard-shell hot tub: £20.84/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.