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Hot Tub · Ofgem 1 July to 30 September 2026

4-person inflatable hot tub running cost — Three times a week (2 h each)

Three 2-hour soaking sessions per week — popular with fitness and recovery users. A 4-person inflatable hot tub (1,500 W heater + 1,500 W pump) costs approximately £7.28/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

4-person inflatable hot tub — Three times a week (2 h each): Active: 6.00 kWh (2 h × 3.0 kW). Standby: 3.30 kWh (22.0 h × 1.5 kW × 10%). Total/day: 9.30 kWh = £2.43. Weekly (3 days): £7.28. Annual: £378.80. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£2.43
Per week (3 days)
£7.28
Per month
£31.57
Per year
£378.80

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
3

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 = 9.30 kWh × 26.11p = £2.43.
  4. Weekly: £2.43 × 3 days = £7.28.
  5. Annual: £7.28 × 52 = £378.80.

Same scenario — other tub sizes

2-person inflatable hot tub: £3.89/wk4-person hard-shell hot tub: £12.22/wk6-person hard-shell hot tub: £22.87/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.