Skip to main content
Hot Tub · Ofgem 1 July to 30 September 2026

2-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 2-person inflatable hot tub (800 W heater + 800 W pump) costs approximately £7.02/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

2-person inflatable hot tub — Economy mode (heat off overnight): Active: 3.20 kWh (2 h × 1.6 kW). Standby: 1.76 kWh (22.0 h × 0.8 kW × 10%). Total/day: 3.84 kWh = £1.00. Weekly (7 days): £7.02. Annual: £364.96. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
£1.00
Per week (7 days)
£7.02
Per month
£30.41
Per year
£364.96

Tub specification

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

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 = 3.84 kWh × 26.11p = £1.00.
  4. Weekly: £1.00 × 7 days = £7.02.
  5. Annual: £7.02 × 52 = £364.96.

Same scenario — other tub sizes

4-person inflatable hot tub: £13.16/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.

No spam. Unsubscribe anytime. A Gera Services product.

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.