The average cost of running a hot tub is less than £1.50 a day in the UK. Specifically, it will cost you between 90p and £1.47 per day, depending on how much energy your hot tub uses.
There’s no feeling quite like coming home from a long day at work and relaxing in your own spa! However, the cost of running and maintaining a hot tub is an important factor that must be considered before you take the plunge and splash out (no pun intended).
Keep reading to find out how we calculated the cost of running a hot tub, and to learn some tips for reducing your hot tub running costs!
What’s the cost of running a hot tub?
The costs associated with running a hot tub depends on a number of different factors, including:
- How often you use your hot tub
- What temperature you have it set at
- Your energy provider
- What type of hot tub you have
The most significant running cost that comes with owning a hot tub is the electricity. On average, a hot tub uses between 3.5 and 6 kWh of energy per day (although an extra-large hot tub may use a bit more than that). You can use these figures to get a rough idea of how much you’ll be paying to heat your hot tub.
Electricity prices in the UK vary by region. However, the current average price cap for a standard variable tariff in the UK is 25.73 pence per kWh for electricity. This is a new price cap for July 2025, as it was previously slightly higher. Based on this, the average household can expect to pay between £328.70 and £563.49 per year to run a hot tub. Divide that by twelve, and you’re looking at roughly £27 to £47 per month.
Depending on how often you drain and refill your hot tub, you may also have to consider the water bill. Some people choose to forgo draining their hot tubs if they are on a water meter, as it can be cheaper than refilling it. However, if you don’t plan on using your hot tub for a few months, you may prefer to turn off the tub and drain it fully.
The cost for filling a hot tub tends to be fairly low if you have a standard sized tub. One way to get an estimate of the cost is to look at how much it costs you to fill your bath, and then compare the size of your bath to your hot tub. If your hot tub is twice the size of your bath, it should cost roughly twice as much to fill.
Figure out how much your hot tub costs to run
Want to figure out the hot tub running cost for your area? Take the price per kWh for your region and energy provider, then multiply by the amount of energy your hot tub uses per day (remember, this is usually between 3.5 and 6 kWh). Multiply the result by 365 to get the price for the year.
So altogether, that's: (Price per kWh X Daily Energy) X 365 = Average Cost Per Year.
This is just a rough guide of the running cost, and it may vary slightly with different factors like how often you use your hot tub. Don't forget to divide by 100 to get the cost in pounds if the initial energy price you entered was in pennies!
Energy-efficient hot tubs from Premier Hot Tubs
Here at Premier Hot Tubs, we’re dedicated to giving our clients a first-class spa experience without the first-class price tag!
All of the hot tub models sold by Premier Hot Tubs have a multi-layer of insulation. Plus, our heating systems are efficiently designed to transfer 100% of generated heat directly into the water, thus reducing the time it takes to heat and maintain the water temperature.
Here are some other key features that help keep down the costs of running your hot tub:
1) Foam Insulation
Our hot tubs’ external shells are sprayed with high-density polyurethane insulation. This extra layer of insulation helps to trap heat, warming your hot tub water more efficiently.
2) Thermal-Layered Insulation
The shells of all of our hot tubs are wrapped in an additional layer of thermal-layered insulation, further increasing their energy efficiency without making maintenance a hassle.
3) Thick ABS Base
Our hot tubs come with a solid ABS base as standard. An ABS base is a one-piece construction material that provides a sturdy foundation and seals the bottom of the spa, locking in heat and keeping moisture out. This sturdy (and waterproof!) base can retain heat and minimise heat loss from below. Plus, it reinforces the hot tub’s structure and keeps it safe from the elements and rodents.
4) Thermal Top Cover
If you couldn’t already tell, we’re serious about insulation! All Premier hot tubs come with a thermal top cover, one of the most efficient ways to minimise temperature loss.
5) Economy Mode
Many of our hot tubs are equipped with the most advanced systems and adjustable settings, including an economy mode that’s specially designed to reduce the running costs.
When a hot tub is not in use, economy mode and sleep mode are perfectly balanced for protecting the hot tub whilst keeping the running costs down.
6) Energy Saving Spa Bag
If you’re interested in adding another layer of insulation to really trap that heat in and make sure your running costs are as low as they can be, why not consider investing in an insulated spa bag cover?
These durable spa-bag covers protect your hot tub from the elements and natural wear and tear, all while keeping the hot tub running costs down by preventing heat from escaping.
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If you’re interested in keeping running costs low, but still want to add a luxurious (and energy efficient) hot tub to your home, why not browse the range of hot tubs available from Premier Hot Tubs?
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Read More: How Long Can You Leave a Hot Tub Unattended?
