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Hot Tub · Ofgem 1 July to 30 September 2026

4-person inflatable hot tub running cost — Standby / maintain temperature only

Tub is kept hot but not used — standby heating cost only. A 4-person inflatable hot tub (1,500 W heater + 1,500 W pump) costs approximately £6.58/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

4-person inflatable hot tub — Standby / maintain temperature only: Active: 0.00 kWh (0 h × 3.0 kW). Standby: 3.60 kWh (24.0 h × 1.5 kW × 10%). Total/day: 3.60 kWh = 94.0p. Weekly (7 days): £6.58. Annual: £342.15. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
94.0p
Per week (7 days)
£6.58
Per month
£28.51
Per year
£342.15

Tub specification

Seats
4 adults
Heater
1,500 W
Pump
1,500 W
Active use
0 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 × 0 h = 0.00 kWh.
  2. Standby: 1,500 W ÷ 1000 × 24.0 h × 10% = 3.60 kWh.
  3. Daily total: 0.00 + 3.60 = 3.60 kWh × 26.11p = 94.0p.
  4. Weekly: 94.0p × 7 days = £6.58.
  5. Annual: £6.58 × 52 = £342.15.

Same scenario — other tub sizes

2-person inflatable hot tub: £3.51/wk4-person hard-shell hot tub: £13.16/wk6-person hard-shell hot tub: £26.32/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.