Hot tubs offer a great way to relax and unwind, but many potential owners ask the same question: how much does it cost to run a hot tub? Especially with energy prices going up in many regions like the UK and Europe. Understanding the real ongoing costs—especially energy and maintenance—is crucial before making the investment.
In this article, we’ll break down the average monthly and yearly costs of running a hot tub, including electricity usage, heating, water treatment, and maintenance expenses.
Average Monthly Cost of Running a Hot Tub
For most hot tub owners in the UK or US, monthly running costs range from £30–£60 (or $40–$80), depending on factors like hot tub size, insulation quality, energy rates, and usage frequency.
Energy Costs: The Biggest Expense
Hot tubs typically use 1.5 kW to 6 kW per hour when heating. The most energy-intensive component is the heater, which maintains the water temperature (typically around 37–40°C or 98–104°F).
Electricity Cost Breakdown:
- Daily Use (1 hour heating): ~3–6 kWh
- Average Electricity Rate (UK): £0.28/kWh → £0.84–£1.68 per day
- Monthly Electricity Cost: ~£25–£45
- Yearly Energy Cost: ~£300–£550
Tip: Poorly insulated hot tubs or outdoor models exposed to wind and cold temperatures will cost significantly more to run. Consider installing a solar heating solution to heat your hot tub to bring down electricity consumption.
Maintenance Costs
Hot tubs need regular care to stay safe, clean, and efficient.
Key Maintenance Expenses:
| Item | Frequency | Cost (Approx.) |
|---|---|---|
| Water Treatment Chemicals (chlorine/bromine, pH balancers) | Monthly | £10–£20 / $15–$25 |
| Water Replacement | Every 3–4 months | ~£5–£10 (water + heating) |
| Filter Cleaning/Replacement | Monthly / Annually | £5–£10 / £30–£50 |
| Servicing (optional) | Annually | £100–£200 |
Average monthly maintenance cost: £15–£25 / $20–$35
Seasonal Variation in Costs
Expect higher energy bills during autumn and winter, especially for outdoor tubs, as more energy is needed to maintain water temperature.
Winter Running Tip:
- Use a hot tub cover and thermal blanket
- Install a windbreak or enclosure
- Consider installing a solar heating kit to offset electricity use
Can You Reduce the Cost to Run a Hot tub?
Absolutely! Here are smart ways to save money to run your hot tub:
- Upgrade insulation: Well-insulated hot tubs lose less heat.
- Use a high-quality cover: Prevents heat from escaping.
- Lower your set temperature: Even 1–2 degrees saves energy.
- Use a timer: Heat water only when needed.
- Go solar: Products like the SolarisKit HT100 can reduce heating costs by harnessing the sun’s energy.
Final Verdict: What’s the Real Cost?
| Category | Monthly Cost Estimate |
|---|---|
| Energy | £25–£45 |
| Maintenance | £15–£25 |
| Total | £40–£70 per month |
Over a year, expect to spend £480–£840 ($600–$1,000) running an average hot tub.
Conclusion
Running a hot tub isn’t free, but the costs can be manageable—and even reduced—through smart energy-saving practices. Whether you’re planning to buy a hot tub or already enjoying one, understanding your energy and maintenance costs helps you make the most of your spa without breaking the bank.
