March 27, 2025

Are Hot Tubs Expensive to Run? Full Cost Breakdown & Tips

Hot tubs: bliss for your back, but what about your bank account? Short answer—they can be pricey, but it depends on size, usage, and energy smarts. Before you ditch the dream, stick around—this guide spills the beans on running costs and clever ways to keep those bills in check.

Understanding the Initial Investment vs. Ongoing Costs

Buying a hot tub isn’t just a case of picking one that looks pretty and crossing your fingers.

There’s the upfront cost, of course—but the real secret lies in the long-term running costs. Think of it like buying a car: you don’t just look at the price tag—you consider fuel, servicing, and insurance too.

Let’s break it down.

The Initial Purchase Price: Factors and Ranges

You can expect to spend anywhere from £3,000 to over £15,000 on a new hot tub.

But what makes up that price? A few things, actually.

Size and Features

Small, two-seater models are at the cheaper end, starting around £3,000. But throw in massage jets, mood lighting, a built-in sound system and enough space for six, and you're edging closer to the £10,000+ mark.

Basically, the more bells and whistles, the bigger the bill.

Brand and Quality

Not all tubs are created equal. Well-known names like HotSpring or Jacuzzi often carry a higher price—but for good reason. They’re built to last, offer better insulation, and typically have lower running costs over time.

Sometimes, spending a bit more upfront saves you money later.

Installation and Delivery

This part catches people out. It’s not just about getting it to your door—delivery, electrical work, and possibly even crane hire can add £500 to £2,000 to your total spend.

So, budget wisely and ask about installation costs early on.

Beyond the Sticker Price: What Are the Running Costs?

Here’s the kicker—owning a hot tub isn’t just about the buying price.

Electricity is the main expense, followed by water, chemicals, and upkeep. A cheaper tub with poor insulation could end up costing more to run than a top-quality model.

So if you're working out the true cost, monthly running costs need to be part of the picture.

Breaking Down the Key Running Expenses

Let’s get into the nitty-gritty of what you'll actually be paying each month.

Electricity Consumption: The Major Expense

How Much Electricity Does a Hot Tub Use?

Most hot tubs use between 150 and 500 kWh per month.

That translates to around £20 to £80 extra on your electricity bill, depending on how often you use it, how big it is, and how well it’s insulated.

Factors Affecting Electricity Costs

Insulation: Better insulation means the tub holds heat for longer. Less heat lost = less money spent.
Ambient Temperature: Cold weather? Your heater has to work harder.
Usage Frequency: A daily soak will cost more than once-a-week use.
Heater Efficiency: Newer models tend to be much more energy-friendly.

Calculating Your Hot Tub's Electricity Cost

Electricity’s measured in kilowatt-hours (kWh). To calculate, you’ll need the heater's power and how long it runs.

Example:

Heater uses 3kW
Used for 2 hours/day → 3kW × 2h = 6kWh/day
Electricity rate is £0.30/kWh → 6 × £0.30 = £1.80/day or £54/month

Check your specific model’s power rating and your energy tariff for an accurate figure.

Water Costs: Filling and Refilling

How Much Water Does a Hot Tub Hold?

Most standard tubs hold 800 to 1,500 litres of water.

Frequency of Water Changes

You’ll likely do a full change every 3 to 4 months, depending on usage and maintenance. Topping up in between is normal, especially during warmer months.

Calculating Water Usage and Costs

Water isn’t wildly expensive in the UK—roughly £1.50 to £3 per 1,000 litres.

So, filling a 1,000-litre tub costs about £2–£3, plus a little extra for the odd top-up. Small cost, but one to note.

Chemical Costs: Maintaining Water Quality

Essential Chemicals: Chlorine, Bromine, pH Balancers

You’ll need a regular mix of sanitisers (like chlorine or bromine), pH balancers, and shock treatments to keep things clean and safe.

Think of it as a weekly spa check-up for your spa.

Factors Affecting Chemical Usage

Frequent use? You’ll use more chemicals.
Hard water? You may need additional products.
A good cover? That’ll help reduce contamination and chemical usage.

Estimated Monthly Chemical Costs

Most people spend around £10–£30/month on chemicals.

It’s a bit like buying shampoo—it adds up, but it’s essential.

Maintenance and Repairs: Unexpected Expenses

Regular Maintenance Tasks

Here’s your basic hot tub to-do list:

Clean filters every 1–2 weeks
Check water balance weekly
Inspect the shell and cover monthly

It’s all about prevention. Small chores stop big costs.

Potential Repair Costs (Pumps, Heaters, etc.)

Things can break. When they do:

Heater replacement: £300–£600
Pump replacement: £250–£500
Annual professional service: £150–£200

Keeping on top of maintenance often means avoiding these surprise expenses.

Factors That Significantly Impact Hot Tub Running Costs

Your monthly bills aren’t just about usage—they’re shaped by a few key factors.

Insulation: The Key to Energy Efficiency

Cover Insulation

A thick, insulated cover can reduce heat loss by up to 30%. That’s a lot of saved energy.

Shell Insulation

Go for a tub with full-foam insulation or layered shells. It traps heat better and works with your heater, not against it.

Ground Insulation

Got your tub sitting on cold concrete? That’s a heat sink. Add a thermal base pad to stop warmth leaking into the ground.

Climate and Ambient Temperature

Cold, windy garden? Your tub will work harder to keep warm. A sheltered or covered spot can help reduce energy use.

Frequency of Use

Daily soaks feel lush, but they also cost more. Using off-peak hours and smart heating settings can help balance it out.

Hot Tub Size and Design

Bigger tubs need more energy to heat and more chemicals to maintain. Smaller models are ideal if you’re not hosting spa parties every weekend.

Energy Efficiency of the Hot Tub's Components

Modern tubs with LED lights, eco pumps, and efficient heaters are built to save you money in the long run.

Tips for Reducing Hot Tub Running Costs

Here’s how to cut costs without cutting corners.

Invest in a High-Quality, Insulated Cover

It’s one of the easiest ways to save energy. A good cover can knock £100+ off your yearly bill.

Maintain Proper Water Chemistry

Balanced water keeps your parts clean and your chemical usage efficient. It also keeps your skin happy.

Utilise Off-Peak Electricity Hours

Switch to an Economy 7 tariff and heat your tub overnight. You could save up to 25% on electricity.

Lower the Set Temperature When Not in Use

Turning it down by 2–3°C can save a tidy sum over the year. You won’t notice the drop—but your wallet will.

Regularly Clean and Maintain Filters

A clogged filter = a stressed pump. Clean it every couple of weeks to avoid wasting energy.

Consider a Heat Pump for Heating

They’re more efficient than electric heaters and can cut your heating costs by up to 50%.

Windbreaks and Placement

Set your tub up in a sheltered spot, or add fencing, screens, or hedges to block the breeze. Less wind = less heat loss.

Comparing Hot Tub Costs to Other Home Expenses

Contextualise Hot Tub Costs Within Household Budgets

Spending £50–£80 a month on running your hot tub? That’s about the same as your Netflix, Spotify, and takeaway coffee habit combined.

Comparison to Other Luxury or Leisure Expenses

Golf memberships, weekend spa days, or a gym with a jacuzzi? They all cost more in the long run—and you don’t get to wear your dressing gown outside.

Long-Term Cost Considerations and ROI

Lifespan of a Hot Tub

Look after it well, and a hot tub can last 10–15 years. That’s a lot of bubble-filled evenings for your money.

Potential Increase in Home Value

A sleek, well-placed spa can boost your home’s appeal. Especially in outdoor living spaces or garden upgrades.

Health and Relaxation Benefits: An Intangible ROI

Better sleep, relaxed muscles, quality time with family—how do you put a price on that?

Many owners say the health benefits alone make it all worth it.

Final Word: Yes, hot tubs can cost a bit to run—but with a few smart choices, they’re surprisingly affordable. And when you're neck-deep in warm bubbles under the stars, you’ll probably agree: absolutely worth it.

Other articles you may be interested in:

Which Hot Tubs Last the Longest?

The Best Hotels with Hot Tubs

The Hot Tub Guide to Ultimate Benefits

Everything You Need to Know About Hot Tub Foam

The Ultimate Guide To Plug & Play Hot Tubs

Are Hot Tubs Bad For Your Heart?

When is it Safe For Children To Start Using Hot Tubs?

How Much Do Hot Tubs Cost In The UK?

Why Are Hot Tubs Bad For Pregnancy?

Why Are Hot Tubs Good For You?

Is it Cheaper To Keep A Hot Tub On All The Time