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Hot Tub · Ofgem 1 July to 30 September 2026

6-person hard-shell hot tub running cost — Party/summer weekend (4 h)

Long weekend sessions of 4 hours — typical summer party use. A 6-person hard-shell hot tub (6,000 W heater + 2,000 W pump) costs approximately £22.98/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

6-person hard-shell hot tub — Party/summer weekend (4 h): Active: 32.00 kWh (4 h × 8.0 kW). Standby: 12.00 kWh (20.0 h × 6.0 kW × 10%). Total/day: 44.00 kWh = £11.49. Weekly (2 days): £22.98. Annual: £1194.79. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£11.49
Per week (2 days)
£22.98
Per month
£99.57
Per year
£1194.79

Tub specification

Seats
6 adults
Heater
6,000 W
Pump
2,000 W
Active use
4 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 × 4 h = 32.00 kWh.
  2. Standby: 6,000 W ÷ 1000 × 20.0 h × 10% = 12.00 kWh.
  3. Daily total: 32.00 + 12.00 = 44.00 kWh × 26.11p = £11.49.
  4. Weekly: £11.49 × 2 days = £22.98.
  5. Annual: £22.98 × 52 = £1194.79.

Same scenario — other tub sizes

2-person inflatable hot tub: £4.18/wk4-person inflatable hot tub: £7.83/wk4-person hard-shell hot tub: £12.53/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.