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Hot Tub · Ofgem 1 July to 30 September 2026

4-person inflatable hot tub running cost — Party/summer weekend (4 h)

Long weekend sessions of 4 hours — typical summer party use. A 4-person inflatable hot tub (1,500 W heater + 1,500 W pump) costs approximately £7.83/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

4-person inflatable hot tub — Party/summer weekend (4 h): Active: 12.00 kWh (4 h × 3.0 kW). Standby: 3.00 kWh (20.0 h × 1.5 kW × 10%). Total/day: 15.00 kWh = £3.92. Weekly (2 days): £7.83. Annual: £407.32. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£3.92
Per week (2 days)
£7.83
Per month
£33.94
Per year
£407.32

Tub specification

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

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 × 4 h = 12.00 kWh.
  2. Standby: 1,500 W ÷ 1000 × 20.0 h × 10% = 3.00 kWh.
  3. Daily total: 12.00 + 3.00 = 15.00 kWh × 26.11p = £3.92.
  4. Weekly: £3.92 × 2 days = £7.83.
  5. Annual: £7.83 × 52 = £407.32.

Same scenario — other tub sizes

2-person inflatable hot tub: £4.18/wk4-person hard-shell hot tub: £12.53/wk6-person hard-shell hot tub: £22.98/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.