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Hot Tub · Ofgem 1 July to 30 September 2026

2-person inflatable hot tub running cost — Twice a week (2 h each)

Two 2-hour sessions per week — popular for couples or families. A 2-person inflatable hot tub (800 W heater + 800 W pump) costs approximately £2.59/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

2-person inflatable hot tub — Twice a week (2 h each): Active: 3.20 kWh (2 h × 1.6 kW). Standby: 1.76 kWh (22.0 h × 0.8 kW × 10%). Total/day: 4.96 kWh = £1.30. Weekly (2 days): £2.59. Annual: £134.69. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£1.30
Per week (2 days)
£2.59
Per month
£11.22
Per year
£134.69

Tub specification

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

Lay-Z-Spa Miami / Coleman SaluSpa published specs (2024): 800 W heater + 800 W blower motor

How the cost is worked out

  1. Active use: (800 W + 800 W) ÷ 1000 × 2 h = 3.20 kWh.
  2. Standby: 800 W ÷ 1000 × 22.0 h × 10% = 1.76 kWh.
  3. Daily total: 3.20 + 1.76 = 4.96 kWh × 26.11p = £1.30.
  4. Weekly: £1.30 × 2 days = £2.59.
  5. Annual: £2.59 × 52 = £134.69.

Same scenario — other tub sizes

4-person inflatable hot tub: £4.86/wk4-person hard-shell hot tub: £8.15/wk6-person hard-shell hot tub: £15.25/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.