Hot‑tub buyers often worry about running costs, yet the monthly bill is surprisingly manageable when you plan ahead. A high‑quality, well‑insulated tub will use less energy and require less frequent water changes than cheaper models, so it’s worth paying attention to specification as well as price.
Typical monthly costs
- Electricity: Energy‑efficient models with good insulation and a properly fitted cover typically cost £1–£1.30 per day at current UK tariff rates. That’s roughly £30–£40 per month, though larger 32‑amp tubs or ones with powerful jets may cost closer to £3–£4 per day.
- Chemicals: Sanitiser tablets, shock treatments and pH balancers generally add £5–£10 per month. Using quality products and testing the water weekly helps prevent over‑treating.
- Water: Filling an average 1,500‑litre spa costs about £1.50 because water in the UK costs around 88p per 1,000 litres. You only need to change the water every 2–3 months on basic tubs or 6–9 months on models with independent filtration, so monthly water cost is just a few pence.
- Maintenance & servicing: Annual servicing ensures pumps and heaters last longer. Expect £150–£300 per year for a professional inspection, equating to £12–£25 per month. Consumables such as filters and cleaning tools add £250–£350 per year.
Ways to reduce monthly costs
- Invest in insulation: High‑density insulation around the cabinet and an insulated cover dramatically reduce heat loss. Efficient tubs can run on about £1 per day.
- Lower the temperature when not in use: Dropping the thermostat by 2–5 °C overnight or by up to 10 °C when you’re away can cut running costs without sacrificing comfort.
- Use economy modes and energy‑efficient pumps: Many modern tubs include eco‑modes that cycle the pump and heater only when necessary; some allow integration with air‑source heat pumps that reduce electricity use dramatically.
- Shop around for electricity tariffs: When energy prices fluctuate, switching to a cheaper tariff can make a big difference. Focus on unit rates rather than standing charges.
Summary
If you budget £30–£60 per month you’ll comfortably cover electricity, chemicals, water and routine maintenance. Choosing an energy‑efficient model, using a high‑quality cover and adopting energy‑saving habits will keep your bill at the lower end of that range.
For great deals on hot tubs, browse our in-stock hot tubs. If your spa needs a service or repair, you can book servicing or book a repair with our trusted team. To keep your tub in top condition, explore our hot tub accessories for covers, steps, cleaning kits and more.
