A traditional hot tub and a Lay-Z-Spa side-by-side

March 29, 2025

Is a Hot Tub Cheaper to Run than a Lay-Z-Spa?

Dreaming of bubbles without bursting your budget? 💸 Short answer: Lay-Z-Spas are cheaper upfront, but Hot Tubs cost less to run long-term. Curious why? Stick around to compare energy use, insulation tricks, and which spa truly pays off!

Is a Hot Tub Cheaper to Run than a Lay-Z-Spa?

Introduction

Picture this: it’s Friday evening, you’ve had a long week, and there’s nothing better than sinking into a warm, bubbly spa under the stars. But then a thought creeps in—how much is this relaxation costing me?

Many Brits face the same question when choosing between a traditional hot tub and a Lay-Z-Spa. On the surface, one looks more luxurious, while the other is friendly to the bank account.

But when it comes to running costs, things get a bit murkier. From energy use and water care to maintenance and seasonal challenges, there’s more to this comparison than meets the eye.

Let’s unravel the cost question and help you choose the spa that suits both your lifestyle and your wallet.

Understanding Lay-Z-Spa Running Costs

Energy Efficiency of Lay-Z-Spas

Lay-Z-Spas have come a long way from being just a budget-friendly novelty. These inflatable spas are now kitted out with clever features that aim to keep your bills down while still delivering that luxurious soak.

Most models come with an insulated lid and a cushioned base, helping to trap warmth and cut heat loss. The thermostatic heating system maintains water temperature without constantly restarting, which is a quiet money-saver.

They also include a power-saving timer—great if you want it ready when you get home from work—and Freeze Shield™, which keeps the water from freezing in winter without overworking the heater.

Some newer models, like the EnergySense™ and ThermaCore™, go even further. With added insulation, they can reduce heat loss by up to 40%. Pretty impressive for something that deflates when you’re done with it!

Compared to other inflatables, Lay-Z-Spas tend to lead the pack in terms of energy efficiency—especially if you use them smartly.

Factors Affecting Lay-Z-Spa Running Costs

Even the cleverest spa can't escape the reality of the British climate—or your usage habits.

Here’s what really makes the difference:

Size matters. More water takes longer to heat, and that means more electricity.
Where you place it counts. A spa tucked behind a windbreak will keep warm better than one exposed to the elements.
How often you use it changes everything. A weekend soak won’t cost the same as daily dips.
Outdoor temperatures make a huge difference. Colder nights equal longer heat cycles.
Your energy tariff also plays a role. If you’re on a standard rate, costs can sneak up quickly. Off-peak deals can help.

A sheltered garden corner and a bit of planning go a long way to saving energy.

Lay-Z-Spa Running Costs Examples

Let’s get practical. Based on typical UK usage, here’s what you might expect to pay:

Usage	Season	With Thermal Cover	Estimated Weekly Cost
Weekend only (2–3 days)	Summer	Yes	£5–£7
Weekend only (2–3 days)	Winter	No	£12–£18
Full week use	Summer	Yes	£10–£15
Full week use	Winter	Yes	£20–£30

Thermal covers are a game changer. Without one in winter? Expect your electricity bill to feel the chill.

Understanding Traditional Hot Tub Running Costs

Energy Consumption in Traditional Hot Tubs

Now let’s look at the big, solid, luxury spa on the patio. These traditional hot tubs are built to last—and built to perform.

They use high-powered heaters, usually around 2–3kW, to heat up large volumes of water quickly. Circulation pumps keep things clean and ticking over, while hydrotherapy jets deliver the massage magic.

All this does use more electricity than an inflatable, but—and it’s a big but—good insulation makes a massive difference. A well-insulated tub retains heat far better, meaning less reheating is needed.

Some have dual-pump systems, so filtration and jets don’t run at the same time, which helps manage consumption. If you use it often, the efficiency starts to show in your bills.

Other Hot Tub Running Costs

Electricity’s only part of the picture.

Traditional tubs also need a bit more TLC:

Water chemicals are essential to keep it safe—think sanitisers, balancers, and occasional shock treatments.
Water changes are needed every few months.
You’ll likely invest in extras like steps, covers, and filters.
Don’t forget servicing. A yearly check-up or repair might set you back £100–£300.

That said, most of this upkeep is spread out, and with a solid routine, it’s manageable.

Impact of Location and Climate

Here’s where the British weather really flexes its muscles.

In the colder months, maintaining 38°C takes more effort. Even the best-insulated tubs work harder, which naturally increases your energy usage.

If your tub is exposed to the wind, heat loss goes through the roof. Setting it up in a corner or under a pergola can make a big difference—think of it as putting your spa in a cosy jumper.

Lay-Z-Spa vs. Traditional Hot Tub: A Cost Comparison

Initial Investment

Let’s be real—Lay-Z-Spas are miles cheaper to buy.

Most cost between £300 and £900, depending on the model. Traditional hot tubs, on the other hand, start around £3,000 and can climb above £10,000.

So, if budget is tight or you’re just dipping your toes in, a Lay-Z-Spa is a great starter.

Long-Term Running Costs

This is where the plot thickens.

Even though Lay-Z-Spas are cheaper to buy, they can cost more per use—especially during colder months. Traditional hot tubs, thanks to better insulation and efficient components, may use less energy over time.

Here’s a side-by-side:

Spa Type	Average Daily kWh Use	Monthly Cost (Daily Use)
Lay-Z-Spa	4–7 kWh	£60–£100
Traditional Hot Tub	3–5 kWh	£45–£80

If you’re using it regularly, that gap adds up. Some top-tier hot tubs (like those in the Hot Tubs range) are designed specifically to keep running costs low with thick insulation and clever tech.

Maintenance Costs

Lay-Z-Spas are the DIY-lover’s dream:

Basic chemicals
Easy filter swaps: around £10–£15 a year

Traditional tubs are a bit more high-maintenance:

Specialist chemicals and accessories
Filters can cost £40–£80 every year or two
You’ll probably want a pro to do an annual check-up

Durability

This one’s black and white.

Lay-Z-Spas typically last 5–7 years with proper care. Traditional hot tubs? 15+ years is the norm.

That’s potentially three Lay-Z-Spas over the life of a single hot tub. Something to think about if you're playing the long game.

Tips for Reducing Hot Tub/Lay-Z-Spa Running Costs

General Energy-Saving Tips

Want to keep your spa time stress-free and affordable? Try these simple tweaks:

Use a good-quality cover to keep the heat in
Drop the temperature a couple of degrees when not in use
Run filtration cycles overnight on off-peak tariffs
Activate economy or sleep modes
Add extra insulation like floor mats or spa jackets
Keep air valves closed unless you’re using the jets
Maintain balanced water chemistry—your heater will thank you

Hot Tub Placement

Your spa’s spot can seriously affect your bills.

Put it in a sheltered area, away from wind tunnels. Even better, place it near your home for easy access and reduced pipe exposure.

Got a pergola? That’s even more protection—and a stylish bonus.

Conclusion

So, is a hot tub cheaper to run than a Lay-Z-Spa?

The short answer? Sometimes yes, sometimes no.

Lay-Z-Spas are brilliant for occasional use and light budgets. They’re easy to set up, portable, and won’t break the bank upfront. But if you’re a regular soaker, traditional Hot Tubs can pay off long-term, thanks to better insulation and lower running costs over time.

The best spa for you depends on: