Skip to main content

Swim Spa Running Costs Explained: What Does It Really Cost Per Month?

29 March 2026
Swimmer in Swim Spa

One of the first questions most people ask is:

How much does a swim spa cost to run?

The honest answer is:

Most swim spas cost between £80 and £150 per month to run.

But that number can vary depending on a few key factors - which is where many people get caught out.

What Makes Up the Running Costs?

Electricity (Main Cost)

The biggest cost is electricity, which covers:

  • Heating the water
  • Running pumps and jets
  • Filtration

The key difference between swim spas is how efficiently they retain heat.

Better insulated models use less energy and cost less to run.

Water Care

You will need to maintain water quality with chemicals.

Typical cost:

  • £10 to £30 per month

Some systems reduce this further and make maintenance easier.

Water Usage

Water costs are minimal.

You will only need to refill your swim spa:

  • Every 4 to 6 months

Maintenance

Ongoing costs are relatively low but may include:

  • Filters
  • Occasional servicing

What Affects Running Costs the Most?

Insulation Quality

This is the biggest factor.

A well-insulated swim spa:

  • Holds heat better
  • Uses less electricity
  • Costs less long term

Poor insulation leads to higher monthly costs.

Size

Larger swim spas use more energy, but build quality and insulation usually have a bigger impact than size alone.

Usage

The more you use it, the more energy it will use.

However, swim spas are designed to maintain temperature efficiently, so the difference is often smaller than expected.

Location

Installation also matters.

For example:

  • Sheltered areas help retain heat
  • Wind exposure increases energy use

The Biggest Mistake People Make

Focusing only on the purchase price.

In reality:

Cheaper swim spas often cost more to run.

We regularly see lower-priced models:

  • Lose heat quickly
  • Use more energy
  • Cost more over time

This is why it is important to consider total cost of ownership, not just upfront cost.

Are Swim Spa Running Costs Worth It?

For most people, yes.

When compared to:

  • Gym memberships
  • Pool maintenance
  • Other leisure costs

A swim spa can offer strong long-term value - especially if used regularly.

Final Thought

Running costs are important - but choosing the right swim spa is what really determines how much you will spend over time.

The better the insulation and build quality, the lower your costs will be.

Want a More Accurate Estimate?

If you are considering a swim spa, we can give you a more accurate estimate based on your setup and usage.

Alternatively, you can book a visit or wet test and we can talk everything through with you:

Book your swim spa session here

Written by
Carla Massey
Updated: 29/03/2026

Stay up to date with us