How Much Does it Cost to Run a Hot tub?

Hot tub running costs can vary depending on several factors, including the size of the hot tub, the temperature settings, usage frequency, local electricity rates, and much more.


Whilst the exact amount a hot tub costs depends on a number of factors, roughly a hot tub will cost between £70 and £120 per month, or around £800 - £1400 per year


There are four main factors to take into account when it comes to how much it costs to run a hot tub:


  1. Electrical running costs
  2. Servicing and maintenance
  3. Frequency of usage 
  4. Efficiency of hot tub

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1. Electrical hot tub running costs


Electrical hot tub running costs depend on several factors, including the size and efficiency of the hot tub, temperature settings, usage frequency, and local electricity rates. Here are the main components that contribute to the electrical cost of operating a hot tub:



Heating the water is the most energy-consuming aspect of running a hot tub. The energy required to maintain the desired temperature depends on the heater's efficiency, the hot tub's insulation, and the ambient temperature. Typically, the heater's power rating ranges between 1.5 kW to 6 kW.



The pump circulates the water through the hot tub's filtration system and powers the jets. Energy consumption varies depending on the pump's size and efficiency, as well as the amount of time it operates. Pumps typically have a power rating between 0.5 kW to 2 kW.

Additional components: 


Other electrical components, such as lights, ozonators, or sound systems, can also contribute to the overall energy consumption. However, these components typically use less energy compared to heaters and pumps.


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Total Electricity costs

Monthly cost: £30 - £50

Yearly Cost: £400 - £600


Total electricity costs can vary greatly depending on your electricity rate, electrical components power and how often the hot tub will be used. We’ve compiled a cost per month calculation below so you can find a more accurate number for your hot tub.

Cost per month Calculation


To estimate the electrical running cost of your hot tub, you'll need to determine your local electricity rate (you’ll find this on your electricity bill - usually expressed in pence per kilowatt-hour) and estimate the hot tub's energy consumption. The formula to calculate the approximate cost is:


Cost per month = (Heater power + Pump power + Additional components power) × Hours of operation × Electricity rate × Days per month


For example, if your heater's power is 2 kW, the pump's power is 1 kW, and additional components use 0.5 kW, the total power consumption is 3.5 kW. If the hot tub operates for 3 hours per day, the electricity rate is £0.30 per kWh, and you run it for 30 days, the monthly electrical cost would be:


Cost per month = (3.5 kW) × (3 hours) × (£0.30 per kWh) × (30 days) = £90


Keep in mind that this calculation formula is a rough estimate, and your actual costs may be higher or lower based on your specific circumstances. It's essential to research and understand the costs associated with the specific hot tub model you are considering and your local utility rates to get a more accurate estimate.


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2. Servicing, maintenance, and water care


Servicing, maintenance, and water care are essential aspects of owning and operating a hot tub to ensure its longevity and proper function. Regular maintenance can help prevent more significant issues and costly repairs in the long run. Here are some common tasks associated with hot tub servicing, maintenance, and repairs:



Regularly clean the hot tub shell, cover, and surrounding area to prevent the buildup of dirt, debris, and bacteria. You may need to purchase hot tub cleaning supplies, such as brushes, sponges, and specialised cleaning solutions. Purchasing a self cleaning hot tub is a good way to get around this.

Water chemistry: 


Maintain the proper water chemistry by testing the water regularly and adjusting chemical levels as needed. This includes adding sanitizers (chlorine or bromine), pH balancers, and other water care products. 

Filter maintenance: 


Clean the filter cartridge regularly to ensure proper water flow and filtration. Replace the filter cartridge as needed, typically every 1-2 years, depending on usage and the specific filter. 

Draining and refilling: 


Drain and refill the hot tub periodically, usually every 3-4 months, to maintain water quality. The cost of water will depend on your local water rates.

Inspecting components: 


Regularly inspect components such as the pump, heater, and control system for signs of wear or damage. If a component fails or becomes damaged, you may need to hire a professional technician to repair or replace it. Repair costs can vary depending on the specific issue and the cost of replacement parts.





 If you live in a region with freezing temperatures, you may need to winterise your hot tub to protect its components from damage caused by freezing water. This process may require additional supplies and labour, depending on your hot tub's specific requirements.


Professional servicing: 


Some hot tub owners choose to hire a professional technician for routine maintenance, inspections, and repairs. This can help ensure the hot tub is well-maintained and can catch potential issues early. The cost of professional servicing varies depending on the level of service provided and the frequency of visits.

Total servicing, maintenance, and water care costs

Again, this can vary greatly depending on a number of factors such as the efficiency of your hot tub, the age of your hot tub, and if you need to repair your tub:


Monthly Cost: £40 - £70

Yearly Cost:  £500 - £800


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3. Frequency of usage


It’s no surprise that the frequency of usage has a significant impact on the cost of running a hot tub. 


This is due to the energy required to heat the water; the more frequently you use the tub, the more energy you'll need to maintain its temperature. Furthermore, more regular usage means more frequent water changes, filter replacements, and chemical treatments, all of which contribute to the expenses we’ve mentioned.

Now let’s look at how you can improve the efficiency of your hot tub so you get better value for money.

How to run a hot tub economically

Efficient Heating


Heating the water in your hot tub is likely the most energy-consuming aspect of its operation. To reduce costs, consider keeping your hot tub at a constant, slightly lower temperature instead of heating it up quickly each time you use it. It takes less energy to maintain a steady temperature than to heat cold water quickly.


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Optimise Insulation


Having good insulation for your hot tub is critical to minimise heat loss, especially during colder months. Ensure that your hot tub is well-insulated and consider investing in a high-quality, well-insulated cover. The cover not only keeps debris out but also locks in heat when the tub isn't in use, reducing the energy needed to maintain or increase the temperature. 

Regular Maintenance


Regular maintenance of your hot tub is crucial for economical operation. Regularly clean the filters and replace them when necessary. A clogged or inefficient filter system makes the hot tub work harder, leading to higher energy consumption. Also, be sure to check and maintain the right chemical balance of your water to prevent damage to your hot tub components, which could lead to costly repairs.

Use Energy Saving Modes


Many modern hot tubs come with energy-saving modes or settings. These modes often involve reducing the temperature when the tub is not in use or during off-peak hours. If your hot tub has this feature, make sure to take advantage of it.

Efficient Usage


Consider your usage habits. Can they be adjusted for more efficient operation? For example, limiting the use of jets or reducing soak time can significantly cut down on energy consumption. Also, remember to put the cover back on immediately after use to prevent heat loss.

Upgrade to Energy Efficient Models


If your hot tub is old and you find its running costs are high, consider investing in a newer, energy-efficient model. For example, Hydropools hot tubs are engineered for maximum efficiency with thermal technology to lock heat in and keep your energy bills to a minimum. 


Running a hot tub economically doesn't have to be complicated. With some strategic decisions and adjustments, you can significantly reduce the running costs while still enjoying all the benefits your hot tub has to offer.


So there you have it, there’s how much it costs to run a hot tub, along with the different components that go into the running of a hot tub. If you’re interested in getting an energy efficient hot tub so you can save on some of the running costs, please get in touch.