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

2-person inflatable hot tub running cost — Summer daily use (1.5 h, warm ambient)

Summer daily use: lower maintenance fraction (5%) because warmer ambient temperature reduces heat loss. A 2-person inflatable hot tub (800 W heater + 800 W pump) costs approximately £6.03/week at Ofgem cap 26.11p/kWh (1 July to 30 September 2026).

2-person inflatable hot tub — Summer daily use (1.5 h, warm ambient): Active: 2.40 kWh (1.5 h × 1.6 kW). Standby: 0.90 kWh (22.5 h × 0.8 kW × 5%). Total/day: 3.30 kWh = 86.2p. Weekly (7 days): £6.03. Annual: £313.63. Source: Which? — How much does a hot tub cost to run (electricity consumption data) + Ofgem (OGL v3.0).

Per day (used)
86.2p
Per week (7 days)
£6.03
Per month
£26.14
Per year
£313.63

Tub specification

Seats
2 adults
Heater
800 W
Pump
800 W
Active use
1.5 h/day
Standby load
5% 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 × 1.5 h = 2.40 kWh.
  2. Standby: 800 W ÷ 1000 × 22.5 h × 5% = 0.90 kWh.
  3. Daily total: 2.40 + 0.90 = 3.30 kWh × 26.11p = 86.2p.
  4. Weekly: 86.2p × 7 days = £6.03.
  5. Annual: £6.03 × 52 = £313.63.

Same scenario — other tub sizes

4-person inflatable hot tub: £11.31/wk4-person hard-shell hot tub: £18.51/wk6-person hard-shell hot tub: £34.27/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.