Are Hot Tubs Expensive to Run in the UK? A Detailed Cost Analysis and Savings Guide

Are Hot Tubs Expensive to Run in the UK? A Detailed Cost Analysis and Savings Guide

Thinking of investing in a hot tub but worried about the running costs in the UK? You’re not alone. Hot tubs provide relaxation, stress relief, and health benefits — but they also require continuous energy to keep the water warm and clean.

This guide breaks down average hot tub running costs in the UK, explores the main factors that influence electricity usage, and offers practical cost-saving tips. By the end, you’ll know what to expect on your utility bill and how to keep costs as low as possible.

1. Understanding Hot Tub Energy Consumption in the UK

Hot tubs consume electricity mainly for:

  • Heating the water – The biggest energy draw. Maintaining 37–40°C, especially in winter, requires frequent heater cycles.

  • Filtration and circulation – Pumps run intermittently to maintain clean, hygienic water.

  • Jets and lighting – Used during sessions, not continuously, but they still add to total energy use.

On average, hot tubs use 30–90 kWh per month. Smaller 2–3 person models typically use 30–50 kWh, while 5–7 person tubs can exceed 70–90 kWh.

According to Ofgem, UK electricity costs around 34p per kWh (2025). This means running a hot tub costs £15–£50 monthly, depending on usage, size, and efficiency.

2. Key Factors Affecting Running Costs

  • Insulation quality – High-quality insulation and thermal covers drastically reduce heat loss.

  • Frequency of use – Daily long sessions drive up consumption; occasional use allows eco modes to work effectively.

  • Seasonal changes – Winter increases heating demand; summer costs drop significantly.

  • Set temperature – Keeping the tub at a slightly lower temperature when not in use can cut costs.

  • Duration of sessions – Longer jet use equals higher electricity bills.

For a 4-person well-insulated hot tub used several times weekly, expect costs around £25–£35 per month. The same model, poorly insulated and heavily used, could exceed £50.

3. Example Cost Comparison

Model Avg. kWh per Month Estimated Monthly Cost (£)
2–3 Person Hot Tub ~35 kWh ~£12
5–6 Person Hot Tub ~75 kWh ~£26

Figures assume an electricity tariff of 34p/kWh and average seasonal use. Costs rise in winter or if no thermal cover is used.

For detailed insights into optimal water temperature settings, see our guide on finding the best hot tub temperature in the UK.

4. Tips to Reduce Hot Tub Running Costs

  • Use a thermal cover – Prevents unnecessary heat loss when not in use.

  • Lower water temperature by 1–2°C – Small changes save noticeable amounts.

  • Schedule heating for off-peak hours – If you’re on a flexible tariff, this can cut costs.

  • Limit jet use – Enjoy them but avoid running jets constantly.

  • Maintain your hot tub – Clean filters and serviced pumps work more efficiently.

  • Install smart controls – Timers and remote heating control optimise energy cycles.

For more seasonal safety advice, see our guide on using a hot tub in winter.

5. Seasonal Considerations

UK winters increase hot tub costs because heaters run more often. In contrast, summer bills are lower since ambient temperatures reduce heat loss.

Investing in energy-efficient models with advanced insulation, smart thermostats, and variable speed pumps can make a significant difference. According to the Carbon Trust, improving insulation and energy management in appliances can cut energy costs by up to 20%.

Conclusion

Running a hot tub in the UK typically costs £15–£50 per month, depending on tub size, insulation, and usage. With smart habits like using thermal covers, reducing water temperature slightly, and running during off-peak hours, you can keep costs under control.

For the best experience, invest in an energy-efficient hot tub and maintain it properly to maximise relaxation without unnecessary expense.

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