Your complete 2026 buyer’s guide to hot tub prices, running costs, installation and everything in between — from Online Spas, the UK’s favourite hot tub supplier.
Whether you have been dreaming about soaking under the stars in your own garden or looking for a way to add genuine year-round relaxation to your home, buying a hot tub is an exciting decision — but it can also feel overwhelming. With so many models, sizes, and price points available, it is hard to know where to start.
The most common question we hear from people considering a hot tub for the first time is: how much does it actually cost? The honest answer is that it depends on what you are looking for — but in this guide, we break down everything you need to know, from the initial purchase price through to running costs, installation and long-term maintenance.
At Online Spas, we are the UK’s favourite luxury hot tub supplier, with over 1,300 five-star Trustpilot reviews and a range that covers everything from affordable plug-and-play models through to premium 7-seater 32amp spas, swim spas and ice baths. Whatever your budget and garden, we have a hot tub to suit you.
In This Guide We Answer:
- How much does a hot tub cost in the UK in 2026?
- What is the difference between a plug-and-play and a 32amp hot tub?
- How much does it cost to run a hot tub in the UK?
- What size hot tub do I need?
- Do I need planning permission to install a hot tub in my garden?
- What base or foundation do I need for a hot tub?
- Can I buy a hot tub on finance?
- What should I look for when buying a hot tub?
- How long does a hot tub last and what maintenance does it need?
- What is a swim spa and is it better than a hot tub?
1. How Much Does a Hot Tub Cost in the UK in 2026?
In 2026, a new hot tub in the UK typically costs between £3,500 and £12,000+ for a quality permanent model, with most buyers spending around £5,000 to £8,000 once delivery and installation are factored in. Here is a breakdown by category:
| Category | Price Range | Best For | Power |
| Entry-Level Plug & Play | Up to £4,000 | First-time buyers, couples | 13amp |
| Mid-Range Family | £4,000 – £6,000 | Families of 4–5, regular use | 32amp |
| Premium Luxury | £6,000 – £8,000 | Larger families, frequent use | 32amp |
| Top-of-Range | £8,000 – £12,000+ | Maximum jets, dual loungers | 32amp |
| Swim Spas | £10,000 – £20,000+ | Swimming + hydrotherapy | 40amp |
On top of the hot tub price itself, you should budget for:
- Electrician costs: £150–£500 for a 13amp outdoor socket; £400–£900 for a 32amp supply
- Delivery: typically £150–£400, or more if crane access is required
- Base preparation: £200–£800 if a concrete base or reinforced decking is needed
- Cover and accessories: £100–£400 for a quality cover, steps and starter chemical kit
| Online Spas Tip | At Online Spas, our hot tub prices start from under £3995 and we offer a full range up to premium luxury models. All prices on our website include delivery across the UK mainland, and we offer flexible finance options to spread the cost. |
2. What Is the Difference Between a Plug-and-Play and a 32amp Hot Tub?
This is one of the most important questions for first-time buyers, and the answer will shape which models you should be looking at.
| Plug & Play (13amp) | 32amp Hard-Wired | |
| Power Supply | Standard 3-pin household socket | Dedicated supply — electrician required |
| Electrician Cost | £150–£500 for outdoor socket | £400–£900 for dedicated supply |
| Heating Speed | Slower — typically 6–8 hours from cold | Faster — typically 3–4 hours from cold |
| Jets | 1 jet pump only | Up to 2 jet pumps + circulation pump |
| Heat & Jets Together | No — heater pauses when jets run | Yes — full performance simultaneously |
| Running Costs | Slightly higher due to less efficiency | Lower per use due to better insulation |
| Best For | Budget buyers, occasional use, renters | Regular use, full performance, year-round |
For most buyers who want to use their hot tub regularly throughout the year, a 32amp model is the better long-term investment. The extra upfront cost of the electrical installation is typically recouped through lower running costs and a significantly better user experience.
That said, if you are renting a property, have a tight budget, or want to try hot tub ownership before committing to a larger installation, a plug-and-play 13amp model from Online Spas is a great place to start.
3. How Much Does It Cost to Run a Hot Tub in the UK?
Running costs are one of the biggest concerns for prospective hot tub buyers — and rightly so. The good news is that a quality, well-insulated hot tub is far more affordable to run than most people expect.
Based on the current UK electricity rate of around 27–28p per kWh, here is what you can realistically expect to pay:
| Hot Tub Type | Estimated Monthly Cost | Estimated Annual Cost |
| Energy-efficient 32amp model | £40 – £65 per month | £480 – £780 |
| Standard 32amp model | £65 – £90 per month | £780 – £1,080 |
| Plug & Play (13amp) | £70 – £100 per month | £840 – £1,200 |
| Poor quality / uninsulated | £100 – £150+ per month | £1,200 – £1,800+ |
In addition to electricity, budget approximately:
- Water chemicals: £10–£20 per month for a quality treatment programme
- Filter replacements: £30–£80 every 12–18 months
- Annual service: £100–£200 if you opt for a professional maintenance visit
The single biggest factor in running costs is insulation quality. A poorly insulated hot tub — often a cheap import — can cost five to six times more to run than a well-insulated model. At Online Spas, we only stock hot tubs that meet high energy efficiency standards, so you can enjoy your spa without dreading the electricity bill.
| Money Saving Tip | Keeping your hot tub covered when not in use is the single most effective way to reduce running costs. A good quality cover retains heat and can cut your energy usage by up to 50% compared to leaving the tub uncovered. |
4. What Size Hot Tub Do I Need?
Choosing the right size hot tub comes down to three things: how many people will use it regularly, how much space you have, and your budget. Here is a practical guide:
| Size | Seats | Typical Dimensions | Best For |
| 4-Seater | 3–4 people | Approx. 2.0m x 2.0m | Couples or small families |
| 5-Seater | 4–5 people | Approx. 2.1m x 2.1m | Small families, one lounger |
| 6-Seater | 5–6 people | Approx. 2.2m x 2.2m | Families, entertaining |
| 7-Seater | 6–7 people | Approx. 2.3m x 2.3m | Large families, social use |
A word of honest advice: manufacturers’ stated seating capacities are often generous. A 6-person hot tub comfortably seats 4 adults for a relaxed soak. If you regularly entertain larger groups, size up accordingly.
If you want a lounger seat — the full-length reclining position that lets you lie back completely — check that the model you choose includes one. Online Spas offers hot tubs with one or two lounger positions across the range, and our team can advise on which layout works best for your household.
| Online Spas Range | Browse our full range by seat count — from 4-seat to 7-seat hot tubs — at onlinespas.co.uk. We can also help you choose by budget, with models available from under £3995 right through to premium luxury configurations. |
5. Do I Need Planning Permission to Install a Hot Tub in My Garden?
In most cases, no — and this surprises many first-time buyers. Hot tubs are generally classed as portable or temporary structures in the UK, which means they fall under permitted development rights and do not require a planning application.
However, planning permission may be required in the following circumstances:
- Your property is a listed building
- Your garden is in a conservation area or area of outstanding natural beauty
- You are building a significant raised deck, gazebo or enclosed structure around the hot tub
- The structure covers more than half of your garden area
- The enclosure exceeds 3 metres in height (pent roof) or 4 metres (apex roof)
For the vast majority of UK homeowners installing a hot tub directly onto an existing patio or a new concrete base in their back garden, no planning permission is needed. If in doubt, a quick call to your local planning authority before purchase will give you certainty.
| Good to Know | The Online Spas team has helped thousands of customers across the UK with their installations and can advise on the practical aspects of siting your hot tub. We will flag any considerations we are aware of for your situation when you speak to us. |
6. What Base or Foundation Do I Need for a Hot Tub?
A solid, level base is non-negotiable for a hot tub installation. A filled hot tub can weigh anywhere from 1,500kg to over 3,000kg depending on size — that is the equivalent of a small car to a large van sitting in one spot. An inadequate base will flex, crack or sink over time, potentially damaging your hot tub and voiding its warranty.
Concrete Base
A reinforced concrete slab is the gold standard for hot tub installation. It should be at least 100mm thick, fully level, and allowed to cure fully before the hot tub is placed on it. Cost: typically £200–£600 depending on size and your location.
Existing Patio
A solid existing patio or slab may be suitable if it is level, free from cracks, and thick enough to bear the weight. Your installer will be able to assess this during delivery. Not all patios are suitable, particularly older or thin concrete slabs.
Reinforced Decking
Timber decking can work but must be purpose-built and reinforced to bear the weight of a filled hot tub. Standard garden decking is not appropriate. If you want a decked surround, we recommend consulting a specialist before installation.
What to Avoid
- Grass or soft ground — the tub will sink and tilt over time
- Gravel — unstable and will not provide even support
- Thin or cracked slabs — risk of cracking further under load
| Online Spas Tip | Not sure if your existing base is suitable? Our delivery and installation team can assess your proposed site and advise you before your hot tub arrives. We want your installation to be perfect from day one. |
7. Can I Buy a Hot Tub on Finance?
Yes – and at Online Spas, we offer flexible finance options to help you spread the cost of your dream hot tub. Rather than paying the full amount upfront, finance allows you to enjoy your hot tub from day one while making manageable monthly payments.
Finance is available across our full range — from entry-level plug-and-play models right through to premium 32amp luxury spas. The application process is straightforward, and our team can walk you through your options when you get in touch.
When considering finance, it is worth factoring in the full picture:
- The monthly cost of finance repayments
- Monthly running costs (typically £40–£90 for a quality model)
- The long-term value — a quality hot tub lasts 15–20 years, making the cost per use very low over time
Many of our customers find that spreading the purchase cost over a manageable term makes a premium hot tub significantly more accessible than they initially expected.
| Get a Finance Quote | Contact or call us on 0333 366 1229 to find out more about our current finance options and to get a personalised quote for your chosen model. |
8. What Should I Look for When Buying a Hot Tub?
Not all hot tubs are created equal. Here are the key factors that separate a quality investment from a purchase you will regret:
Insulation
Full-foam insulation throughout the cabinet is the most effective way to retain heat and keep running costs low. Avoid tubs with minimal or partial insulation — they will cost significantly more to run, especially in UK winters.
Jet Quality and Configuration
More jets does not always mean a better tub — jet placement, direction, and pressure matter more than raw count. Look for a variety of jet types targeting different muscle groups, including neck and shoulder jets, lumbar jets, and foot jets.
Shell Material
The acrylic shell should be thick, reinforced, and UV-stabilised to resist fading and cracking over time. Higher-quality shells retain their finish and structural integrity for 15–20 years.
Energy Efficiency
Look for a well-insulated cover (minimum 100mm thick foam), a quality circulation pump that runs continuously at low cost to keep the water clean, and a good energy efficiency rating from the manufacturer.
Warranty
A quality hot tub should come with at least a 2-year manufacturer warranty on the shell and components, with premium models offering 5 years or more. Be cautious of very short warranties on budget models — they often indicate lower build quality.
Supplier Reputation
Buy from a supplier with a proven track record, verifiable reviews, and a clear aftercare offering. At Online Spas, our 4.88-star rating from over 1,300 Trustpilot reviews reflects our commitment to quality products and outstanding customer service.
9. How Long Does a Hot Tub Last and What Maintenance Does It Need?
A quality hot tub from a reputable manufacturer should last 15 to 20 years with proper care and maintenance. Some well-maintained models continue running well beyond that. The key to longevity is consistent, straightforward maintenance — nothing too technical, but it does need to be done regularly.
Water Chemistry
Keeping your water balanced is the most important ongoing task. You will need to test the water two to three times a week and adjust pH, alkalinity, and sanitiser (chlorine or bromine) levels as needed. A water test kit and a basic chemical starter pack are all you need. Budget around £10–£20 per month for chemicals.
Filters
Hot tub filters should be rinsed weekly, chemically cleaned monthly, and replaced every 12–18 months. Keeping filters clean protects your pumps and heater and helps the water stay crystal clear.
Water Changes
Most hot tubs need a full drain and refill every 3 to 4 months, depending on usage. This keeps the water fresh and prevents chemical build-up. A standard hot tub holds around 1,200–1,500 litres, which costs approximately £3–£6 to refill on a metered supply.
Annual Servicing
While not essential, an annual professional service is a good investment. A qualified technician will check the pumps, heater, jets and seals, topping up any lubricants and identifying any issues before they become costly repairs.
| Online Spas Aftercare | We offer maintenance packages and a comprehensive range of accessories and chemicals at onlinespas.co.uk to keep your spa in perfect condition year after year. |
10. What Is a Swim Spa and Is It Better Than a Hot Tub?
A swim spa is a larger, elongated unit that combines the relaxation benefits of a hot tub with the ability to swim against a powerful jet current – essentially a compact swimming pool and a hot tub in one. They are a growing category, and for the right buyer, they offer exceptional value.
| Hot Tub | Swim Spa | |
| Primary Use | Relaxation, hydrotherapy | Swimming, fitness and relaxation |
| Size | 2.0m – 2.5m square | 4.0m – 6.0m long |
| Cost | £3,500 – £12,000 | £10,000 – £20,000+ |
| Running Costs | £40–£90/month | £80–£150/month |
| Planning Permission | Rarely needed | Rarely needed — check if decked |
| Best For | Relaxation, social use, smaller gardens | Fitness, families, swimming training |
A swim spa is not better or worse than a hot tub — it depends entirely on what you want from it. If you want to swim for fitness, do low-impact aqua exercise, or need something your children can genuinely swim in, a swim spa is the better choice. If you primarily want to relax, socialise and enjoy hydrotherapy, a hot tub is the right product.
Online Spas offers a range of swim spas alongside our hot tub collection, and our team can talk you through both options to help you find the right fit for your garden and lifestyle.
Final Thoughts
Buying a hot tub is one of the best investments you can make in your home lifestyle. Whether you are unwinding after a long week, entertaining friends on a summer evening, or enjoying a winter soak under the stars, the right hot tub will deliver years — even decades — of genuine enjoyment.
In 2026, with a wide range of models available at every price point, flexible finance options, and running costs that are more manageable than ever thanks to improved insulation technology, there has never been a better time to make the leap.
Online Spas has been supplying the UK’s favourite luxury hot tubs for years, with thousands of happy customers and a Trustpilot score of 4.88 to show for it. Whether you are just starting your research or ready to order, our team is here to help you find your perfect spa.
Browse the Full Range at Online Spas
Frequently Asked Questions
Can I keep a hot tub outdoors all year round in the UK?
Yes — a quality hot tub is designed to be used year-round in the UK climate, including through winter. In fact, many owners enjoy their hot tub most in cold weather, when the contrast between the warm water and the cool air is at its most satisfying. The key is keeping the cover on when the tub is not in use to retain heat efficiently.
How long does it take to heat a hot tub?
Heating time depends on the starting water temperature, the outside temperature, and whether you have a 13amp or 32amp model. A 32amp hot tub typically takes 3–4 hours to heat from cold to a comfortable 38°C. A 13amp plug-and-play model can take 6–8 hours. Most owners simply leave their hot tub set to a maintenance temperature (around 36–38°C) so it is always ready to use.
How often do I need to change the hot tub water?
Most hot tubs require a full drain and refill every 3 to 4 months, depending on how frequently the tub is used and how well the water is maintained. A hot tub used heavily by a family of four will need changing more frequently than one used occasionally by a couple. Your water test results will tell you when a change is due.
Are hot tubs safe for children?
Hot tubs can be enjoyed by older children, but some precautions apply. Children under 5 should not use a hot tub due to the risk of overheating, as their bodies regulate temperature less effectively than adults. Older children should only use the tub at lower temperatures (around 36°C rather than the adult maximum of 40°C), for shorter sessions, and always with adult supervision. Never leave children unattended in or near a hot tub.
Can I install a hot tub indoors?
Yes, though it requires more planning than an outdoor installation. Indoors, you will need adequate ventilation to manage humidity and prevent moisture damage to the structure, a floor capable of bearing the weight of a filled tub, and appropriate drainage. Many customers install hot tubs in outbuildings, garages or purpose-built garden rooms. Our team can advise on the specific requirements for an indoor installation.
How do I keep my hot tub water clean?
Clean hot tub water requires a combination of filtration, sanitisation, and regular chemical balancing. Test your water 2–3 times per week for pH (target 7.2–7.6), alkalinity (80–120 ppm), and sanitiser levels. Sanitise with either chlorine or bromine, and shock dose the water weekly to break down organic contaminants. Rinse your filters weekly and chemically clean them monthly. Online Spas stocks a full range of chemicals and testing kits.
What is an ice bath and what are the benefits?
An ice bath — also known as a cold plunge — is a compact tub designed for cold water immersion therapy. Used regularly, cold water immersion is associated with benefits including faster muscle recovery, improved circulation, enhanced mental clarity, reduced inflammation, and a significant boost in mood and energy. Online Spas offers the Chill Tub ice bath with a built-in temperature control system, allowing you to dial in your exact cold plunge temperature.
Do hot tubs add value to a property?
A quality, well-installed hot tub can be a positive selling point for many buyers, particularly as garden wellness spaces have grown in popularity. However, it is not universally positive — some buyers may see it as an additional maintenance burden. A hot tub is best viewed as a lifestyle investment rather than a property investment, though many owners find it adds considerable appeal to their home when they come to sell.
How long does delivery and installation take?
Once you have ordered your hot tub from Online Spas, most deliveries take place within 2 to 6 weeks, depending on the model and your location. Installation on the day is typically completed within a few hours, including positioning, filling, powering up, and a full handover walkthrough. We will confirm your specific delivery timeline when you place your order.
What is the difference between a hot tub and a swim spa?
A hot tub is a compact, purpose-built unit for relaxation and hydrotherapy, typically seating 4–7 people. A swim spa is a larger unit — usually 4 to 6 metres long — that incorporates a powerful jet current you can swim against, making it suitable for both exercise and relaxation. Swim spas cost more to buy and run than hot tubs, but offer the functionality of both a pool and a spa in a fraction of the space of a traditional swimming pool.
All pricing figures are indicative for 2026 and based on industry research. Running cost estimates use a UK electricity rate of 27–28p per kWh and assume regular use 3–4 times per week.