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Hot Tub · Ofgem 1 July to 30 September 2026

4-person inflatable 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 4-person inflatable hot tub (1,500 W heater + 1,500 W pump) costs approximately £13.16/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

4-person inflatable hot tub — Economy mode (heat off overnight): Active: 6.00 kWh (2 h × 3.0 kW). Standby: 3.30 kWh (22.0 h × 1.5 kW × 10%). Total/day: 7.20 kWh = £1.88. Weekly (7 days): £13.16. Annual: £684.29. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£1.88
Per week (7 days)
£13.16
Per month
£57.02
Per year
£684.29

Tub specification

Seats
4 adults
Heater
1,500 W
Pump
1,500 W
Active use
2 h/day
Standby load
10% of heater
Days used/week
7

Lay-Z-Spa Paris / Bestway 4-person published specs (2024): 1,500 W heater + 1,500 W blower

How the cost is worked out

  1. Active use: (1,500 W + 1,500 W) ÷ 1000 × 2 h = 6.00 kWh.
  2. Standby: 1,500 W ÷ 1000 × 22.0 h × 10% = 3.30 kWh.
  3. Daily total: 6.00 + 3.30 = 7.20 kWh × 26.11p = £1.88.
  4. Weekly: £1.88 × 7 days = £13.16.
  5. Annual: £13.16 × 52 = £684.29.

Same scenario — other tub sizes

2-person inflatable hot tub: £7.02/wk4-person hard-shell hot tub: £20.84/wk6-person hard-shell hot tub: £38.02/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.