A hot tub in your garden feels like a luxury, but for most buyers the real question comes down to something more practical: what does it actually cost to run?
The answer is not one fixed number. In the UK, monthly running costs typically fall somewhere between £40 and £100, depending on the type of hot tub, how often you use it, and how well it retains heat. Understanding where these costs come from will help you make a smarter choice before you buy.
What makes up the monthly cost of a hot tub?
Most of your monthly cost comes from two things: electricity and maintenance.
Electricity is used to keep the water warm and power the pumps. Maintenance includes chemicals, filters and basic upkeep to keep the water clean and safe.
Compare hot tubs from verified dealers near you and see which models are most energy-efficient. Use the hot tub finder
Electricity costs explained
Electricity prices in the UK change regularly, but as a reference: the average unit rate is around 24–25p per kWh in 2026.
How much your hot tub uses depends on:
- Insulation quality
- Outdoor temperature
- How often you use it
- Whether you keep it heated constantly
A well-insulated hot tub that is used a few times per week will usually cost noticeably less to run than a poorly insulated model that constantly reheats. Rather than a fixed number, it is more realistic to expect electricity costs to vary within a range each month.
Maintenance and water care costs
Besides electricity, you will need to maintain water quality. Most UK owners use chlorine or bromine, combined with regular filter cleaning. These are relatively small costs, but they are consistent.
On average you will spend on:
- Water treatment products
- Filter replacements
- Occasional servicing
Together, these typically add a smaller monthly amount compared to electricity, but they are essential for safe use.
Why some hot tubs are cheaper to run than others
Not all hot tubs are built the same. The biggest difference comes down to insulation and build quality.
Inflatable hot tubs are often cheaper to buy, but they can lose heat faster, especially in colder months. Acrylic hot tubs with better insulation are designed to retain heat more efficiently, which can reduce running costs over time.
Placement also matters. A hot tub that is exposed to wind and cold will need more energy to stay warm than one placed in a sheltered garden.
Does turning your hot tub off save money?
This depends on how you use it.
If you use your hot tub regularly, keeping it at a stable temperature is often more efficient than letting it cool down completely and reheating it every time. If you only use it occasionally, turning it off between uses can reduce costs.
There is no single rule here. Your usage pattern determines what is most efficient.
What does a realistic monthly cost look like?
For most households in the UK, a hot tub is an ongoing expense that sits somewhere between a small utility increase and a lifestyle subscription.
A typical range:
- Lower usage / efficient model: around £40–£60 per month
- Average usage: around £60–£80 per month
- Higher usage or less efficient setup: up to £100 or more
The key factor is not just how much you use it, but how efficient the hot tub is. If you are still comparing options, read more about how to choose the right hot tub before you decide.
How to keep your running costs under control
There are a few simple ways to avoid unnecessary costs:
- Use a high-quality insulated cover
- Place your hot tub in a sheltered location
- Clean filters regularly
- Avoid unnecessary temperature changes
- Choose an energy-efficient model from the start
Small differences in setup can make a noticeable difference over time.
Making the right choice from the start
Running costs are often overlooked when buying a hot tub, but they matter just as much as the purchase price. A cheaper model can end up costing more over time if it is less efficient.
Find trusted hot tub dealers in your area and compare models based on real usage, efficiency and setup. Or read our guide on hot tub installation in the UK to understand what setup is required.
Find trusted hot tub dealers in your area and compare models based on real usage, efficiency and setup. Browse dealers near you
Frequently Asked Questions
How much does it cost to run a hot tub per month in the UK?
Most UK hot tub owners pay between £40 and £100 per month, depending on usage, insulation and electricity prices.
Do inflatable hot tubs cost more to run?
They can be less efficient than well-insulated models, especially in colder weather, which may increase running costs.
Is it cheaper to leave a hot tub on all the time?
If you use it regularly, maintaining temperature can be more efficient. For occasional use, turning it off may reduce costs.
What affects hot tub electricity usage the most?
Insulation, outdoor temperature, usage frequency and water temperature all play a role.