Cheap hot tubs and what you give up to save money

Cheap hot tubs can be good value, but the low price usually comes from thinner insulation, smaller heaters, simpler covers and shorter lifespans. That means you often pay less when you buy and more on electricity, chemicals and replacement parts. The skill is knowing which savings are fine and which ones cost you later.

Below, you will find what each price band realistically gets you, the hidden costs that make a budget tub expensive to own, the red flags to check before you pay, and how a second-hand tub compares. Prices are broad ranges that change with the season, sales and delivery charges, so use them as a guide only.

What does each price band realistically get you?

Hot tub prices in the UK fall into rough bands. The bands overlap, and the same tub can cost very different amounts depending on the retailer, the time of year and what is included. For a fuller breakdown, see our guide to how much hot tubs cost in the UK.

Inflatable tubs (roughly £300 to £1,000)

An inflatable tub is the cheapest way into hot tub ownership. It plugs into a standard 13A outdoor socket, sets up in an afternoon and can be packed away for winter. The trade-off is a soft PVC wall with limited insulation, a small heater and an air bubble system rather than water jets.

Inflating the tub itself is quick. With the built-in pump it usually takes only about 15 to 20 minutes and needs no tools. Filling the tub with water and heating it take far longer, so plan your set-up day around those steps instead.

Many inflatable tubs cannot run the heater and the bubbles at the same time on a 13A supply, so the water cools while the bubbles are on. Heating a full tub from cold can take a day or more, depending on the heater, the starting water temperature and the weather.

As a guide, a compact inflatable typically takes about 12 to 24 hours to reach 40°C (104°F), depending on the outdoor temperature, and larger tubs take longer. Fill and start heating the day before you want your first soak.

Even an inflatable arrives as a large, heavy box. Before you order, check that the delivery vehicle can reach your door and that you, with a helper if needed, can carry the box from the door to the spot where the tub will stand.

Rotomoulded hard shells (roughly £2,500 to £6,000)

A rotomoulded tub has a one-piece moulded plastic shell. It is tougher than an inflatable, has proper seats and water jets, and many models run from a 13A plug. Insulation varies widely between models, so ask what is inside the cabinet rather than assuming.

Entry-level acrylic hard shells (roughly £4,000 to £8,000)

Acrylic tubs have a glossy shell over a reinforced base, more jets and a larger heater. Most need a dedicated 32A supply, which means paying an electrician on top of the purchase price. Quality in this band ranges from solid to poor, and this is where most of the red flags later in this guide apply.

Mid-range and premium tubs (roughly £8,000 and above)

Above this point you are usually paying for better insulation, thicker covers, better filtration, longer warranties and established parts support. Not every extra is worth the money, but insulation, cover quality and parts support are the features that save money year after year.

How many people will really fit?

The capacity printed on the box assumes people sitting shoulder to shoulder. In practice, a '4-6 person' inflatable is comfortable for about 2 to 3 adults, and a '2-4 person' inflatable for about 2. Buy one size up from the number of people who will use the tub regularly.

Most inflatables have a flat floor with no moulded seats, so shorter users may sit with their shoulders out of the water and get cold. A booster seat or bench made for hot tubs lifts them high enough to keep their shoulders under the water during a soak.

Booster seats and benches are usually sold separately. If anyone in your household will need one, add its cost to the price of each tub you compare, or favour a bundle that already includes them.

The soft walls of an inflatable give way a little when you lean back, which some people find uncomfortable on the neck. Padded headrests that clip or strap to the wall make leaning back more comfortable. They are often sold separately, so check whether they are in the bundle and add their cost if they are not.

Why do cheap hot tubs often cost more to run?

The purchase price is paid once. Electricity, chemicals, filters and repairs carry on for as long as you own the tub. A cheap tub can lose its price advantage within a few years if it leaks heat or needs parts you cannot get. Our guide to the true cost of owning a hot tub covers the full budget.

Heat loss through thin insulation

Heating water is the biggest running cost for most owners. A tub with thin insulation in the walls and floor loses heat to the air and the ground, so the heater runs longer to hold the temperature. In a British winter that difference is much larger than in summer.

Cheap tubs usually heat to the same maximum as expensive ones, typically 40°C (104°F), which is the widely recommended upper limit. The difference is how long they take to get there and how much heat they lose between uses.

Inflatable tubs have very little insulation by design. Some manufacturers state a minimum outdoor temperature below which the tub should not be used or cannot hold its temperature. Check your manual before planning winter use.

Some newer inflatables have insulated wall panels as well as an insulated cover. Their makers claim these cut heating energy by up to about 40% compared with similar uninsulated models, although that is a manufacturer figure rather than an independent test. When you compare tubs, check whether the walls themselves are insulated, not just the cover.

If an inflatable will stay up through winter, look for automatic freeze protection. This feature switches the heater on in cold weather to stop the water freezing and protect the pump and liner. It uses some electricity, but a frozen pump or a damaged liner is usually more expensive to put right.

Bigger tubs cost more to heat

A larger tub holds more water, so it takes longer to fill, longer to heat and more energy to keep warm. For example, a round inflatable 1.95 m (about 6 ft 5 in) across holds roughly 15 to 20% more water than one 1.80 m (about 5 ft 11 in) across, depending on wall thickness and depth. Choose the size you will really use, not the largest one your budget allows.

A cover that does not seal

A large share of heat escapes through the top of the tub. A thin, light or poorly fitting cover lets warm, moist air out every hour of the day. A good cover is thick, fits snugly, has locking straps and does not let daylight through at the seams.

A well-fitting insulated cover is one of the most effective ways to cut heating costs. It is commonly said to reduce a tub's heating energy by roughly half or more, although the real saving depends on the tub, the cover and the weather. Put the cover back on every time nobody is using the tub, even for short breaks.

Chemicals and filters

Small tubs hold less water, so the water chemistry changes faster after each use. You will need to test more often and dose carefully in small amounts. Aim for free chlorine of 3-5 ppm (or bromine of 3-5 ppm) and a pH of 7.2-7.6, and follow the product labels.

When you set a monthly chemical budget, include sanitiser, pH test strips and pH adjusters, plus occasional shock treatment. Shock is used after heavy use or when the water starts to look dull, so it is easy to leave out of a budget even though you will need it.

As a rough guide, chemicals for a small tub typically cost about £15 to £35 a month, covering sanitiser, test strips, pH adjusters and occasional shock. The real figure depends on how often the tub is used, the products you choose and your local water, so use it as a starting point for your budget.

Filters for cheap tubs are often small, need rinsing every few days and need replacing regularly. Check the price and availability of replacement filters before you buy, because a tub with an expensive or hard-to-find filter is not cheap to run.

Skipping routine water care is a false saving. Neglected water can turn cloudy, irritate skin and eyes, and clog or damage filters. Putting it right usually means extra chemicals, new filters or a full drain and refill, which costs more than small, regular doses.

Electrical installation

A 13A plug-and-play tub avoids installation costs, but the heater is smaller. A 32A tub heats faster and can usually run the heater and jets together, but it needs a dedicated circuit. The cost of that circuit depends on the distance from your consumer unit and the route the cable takes, so get a quote before you choose a tub.

In the UK, fixed electrical work for a hot tub must meet BS 7671, the wiring regulations, and the circuit needs RCD protection. Use a registered electrician. In England and Wales, adding a new circuit is notifiable work under Part P of the Building Regulations. Scotland, Northern Ireland and other European countries have their own rules, so check what applies where you live.

Never run a hot tub from an extension lead or a cable reel unless the manufacturer's manual specifically allows it. A plug-and-play tub should go into a suitable outdoor socket with RCD protection. If you are unsure, ask a registered electrician. The Electrical Safety First charity publishes free guidance on outdoor electrics.

Short lifespan and replacement parts

An inflatable tub's lifespan is usually counted in seasons rather than many years, depending on care, storage and exposure to sunlight. Pumps, heaters and liners can fail, and if a replacement part costs a large share of a new tub, many owners replace the whole tub. Divide the purchase price by the years you expect it to last to see its real yearly cost.

On many inflatables, one multi-function pump unit inflates the tub and also runs the heater, filter and bubbles. If that unit fails, everything stops at once. Before you buy, check what a replacement pump unit costs and whether it is sold separately in the UK.

As a rough guide, an inflatable typically lasts about 3 to 5 years with good care, while a quality hard shell can last roughly 10 to 20 years. Both figures depend on care, storage and climate, so treat them as typical rather than guaranteed.

How can you estimate the real running cost before you buy?

You can make a sensible estimate with a few figures from the specification sheet and your electricity bill. It will not be exact, but it lets you compare tubs fairly.

1. Find the heater rating in kilowatts (kW) on the specification sheet.
2. Find your electricity unit price in pence per kilowatt hour (kWh) on your latest bill.
3. Estimate how many hours a day the heater will run. This varies with insulation, cover, season and use, so ask the retailer for the manufacturer's running cost figures and check what outdoor temperature they assumed.
4. Multiply the heater rating by the hours to get the daily kWh. For example, a 2 kW heater running for 4 hours uses 8 kWh.
5. Multiply the daily kWh by your unit price, then by 365, to get a rough yearly electricity cost.
6. Add the yearly cost of chemicals, filters and an eventual replacement cover, plus the purchase price divided by the number of years you expect the tub to last.

If you keep an inflatable running all year, expect a noticeably higher electricity bill each month in winter than in summer, because the heater runs for much longer in cold weather. A yearly average hides this, so set aside extra money for the winter months.

Repeat this for each tub you are considering. A tub that costs more to buy can work out cheaper per year once heat loss and lifespan are included. For more on this, read how to choose an energy efficient hot tub.

What red flags should you look for in a budget hot tub?

Some savings are harmless, such as fewer lights or a simpler control panel. Others will cost you money or cause problems later. Treat any of the following as a reason to ask more questions or to choose a different tub.

• Thin or partial cabinet insulation, or a seller who cannot tell you what insulation the tub has.
• No insulation under the floor of the tub, and no insulated base or ground mat supplied.
• A cover that is light, thin, flat on top so rain collects, or missing locking straps.
• An inflatable sold without an insulated thermal cover. It will lose heat quickly, and buying a cover separately adds to the real price.
• Single-layer PVC walls on an inflatable. Multi-layer laminated PVC, and walls with internal fibre or fabric reinforcement, resist punctures better and hold their shape when full.
• No UK address for parts and warranty claims, or parts that ship from overseas with long waiting times.
• A warranty that covers parts only, excludes the heater or pump, or is handled by a company you cannot identify.
• Pumps, heaters or control panels with no brand name or model number, which makes replacement parts hard to find later.
• No UKCA or CE marking on the electrical equipment.
• A plug-and-play tub supplied without RCD protection in the plug lead and without clear instructions for an RCD-protected socket.
• A seating capacity that looks unrealistic for the internal size of the tub.
• No manual available, or a manual that is vague about chemicals, temperature limits and draining.

Before you buy, read reviews from verified buyers of the exact model, not a similar one. Look for repeated reports of leaks, seam failures or pump faults. One bad review can be bad luck, but the same complaint from many buyers shows how reliable the tub is in practice.

Check what is in the box before you compare prices. A complete inflatable package should include an insulated cover, a filter cartridge, a chemical floater or dispenser, a ground sheet and a repair patch. If any of these are missing, add their cost to the price before comparing it with other tubs.

If you live in a hard water area, which covers much of the UK, look for an inflatable with a built-in hard water treatment system. It helps limit limescale on the heater and pump, and a tub without one may need more frequent descaling or earlier repairs in hard water.

UK parts support deserves special attention. If the heater fails in January and the part takes weeks to arrive, the tub sits unused while you keep paying for chemicals to protect the water. Ask the seller which parts they keep in stock in the UK and how long a typical repair takes.

Before you pay, ask the seller to confirm in writing who handles warranty claims in the UK and where replacement heaters, pumps and filters come from. A clear answer is a good sign. A vague answer is a warning.

Inflatable or hard shell: which is better value?

An inflatable tub is often the better choice if your budget is tight, you rent your home, you want to try hot tub ownership first, or you only plan to use it in the warmer months. It needs no installation and no permanent base beyond a level, solid surface. Our guide on how to choose an inflatable hot tub covers the details.

A hard shell is usually better value if you want to use the tub all year, plan to stay in your home for several years, or want proper water jets. The higher purchase price is spread over a longer life, and better insulation keeps winter running costs down.

Whichever type you choose, the surface must be level and strong enough for the full weight. Water weighs about 1 kg per litre, so a tub holding 1,000 litres (about 260 US gallons) carries roughly a tonne of water before anyone gets in. Check the manufacturer's base requirements before delivery day.

Even a modest inflatable is heavy when full. As an example, a round inflatable about 1.80 m across and 66 cm high holds roughly 670 litres (about 177 US gallons), which is about two-thirds of a tonne of water before anyone gets in.

Air bubbles or water jets

The air bubble massage in an inflatable is gentler and quieter than the water jets in a hard shell. It feels relaxing, but it cannot give targeted, deep pressure on particular muscles. If real hydrotherapy is the main reason you want a hot tub, look at hard shells.

Air bubble systems are generally lower-maintenance than water-jet systems because they have fewer plumbing lines and moving parts. There is less pipework to clean and fewer parts to wear out, which is part of why inflatables are cheaper to keep running.

When you compare inflatables, check the number of bubble outlets on the specification sheet. As an example, a compact model might have about 120 outlets and a larger one about 140. More outlets spread around the whole wall give a more even massage at every seat, with no cold spots.

Round or square, and how tall

Square inflatables give each person a defined corner seat, but they need more patio space than a round tub of the same capacity. Round tubs spread the water pressure more evenly around the seams, so less strain falls on any one part of the wall.

As a rough guide, a square inflatable needs about 10% more patio space than a round tub of the same capacity. If you are choosing a square tub, add that margin when you measure.

Wall height matters too. A shallower inflatable, about 66 cm (26 in) high rather than 71 cm (28 in), is easier to step in and out of. That helps shorter users and anyone with limited mobility.

Measure the space first

Measure the space before you order, and include clearance around the tub. You need room to walk around it, take the cover on and off, reach the pump and filter, and step in safely. Use the external dimensions from the specification sheet, not the internal ones.

Is a second-hand hot tub a better deal than a cheap new one?

A used hard-shell tub can give you better insulation and jets than a new tub at the same price. It can also come with problems the seller has not mentioned. The value depends on age, condition and whether parts are still available. See our guide on how much a second-hand hot tub is worth for help with pricing.

Second-hand inflatable tubs are rarely worth buying. The PVC ages with sunlight and repeated folding, and a slow leak is hard to spot until the tub is full in your own garden.

What to check when viewing a used tub

1. Ask the seller to have the tub full, running and hot when you arrive, so you can see the heater, pumps and jets working.
2. Look over the shell for cracks, blisters and soft spots, especially on the seats and around the jets.
3. Remove a cabinet panel if the seller allows it, and look for water marks, damp insulation or corrosion inside.
4. Lift the cover. A very heavy cover has usually absorbed water and will need replacing.
5. Note the brand and model of the control pack and ask whether parts are still available in the UK.
6. Ask for the age of the tub, any service records and the reason for selling.

Budget for the extras. Moving a hard-shell tub may need a specialist team or even a crane, and a 32A tub must be reconnected by a registered electrician. Once it is installed, drain it, flush the pipework with a line cleaner and refill it with fresh water.

Water left standing in a used tub can grow bacteria in the pipework, including Legionella. The Health and Safety Executive explains the risk from warm, stagnant water. Do not use a second-hand tub until it has been properly cleaned, refilled and balanced.

How can you save money without buying the cheapest tub?

• Buy at the end of the season, when retailers often reduce the price of older models.
• Look for discounts on Black Friday, during big online sales events and in post-summer clearance in September and October.
• Compare versions of the same tub. One inflatable is often sold under different brand names, model names or colours, so match the specification sheets and compare prices across them.
• When the same tub is listed in different colours, each colour is often stocked and priced separately. If one colour shows a long delivery wait or a higher price, check the other colours before you order.
• Choose a slightly smaller tub with good insulation over a larger tub with thin insulation.
• Upgrade the cover, or add a floating thermal blanket under it, to cut heat loss.
• Place the tub in a sheltered spot out of the wind, and close enough to the house to keep cable runs short.
• Check whether your electricity tariff has cheaper off-peak hours, and whether your tub can be set to heat during them.
• Choose a tub with a programmable timer, on the control panel or in an app, so you can schedule heating for when you want to use it instead of holding the water at full temperature all the time.
• Check how far ahead the timer can be set. Some inflatable timers let you schedule heating many weeks in advance, in some cases up to about 40 days, so you can leave the water cool while you are away and have it hot when you return.
• Run the water cooler in summer. Many inflatable control panels let you set any temperature from about 20°C (68°F) up to 40°C, and a cooler summer soak uses less energy.
• Keep the water balanced and the filters clean, because a heater and pump that work less hard tend to last longer.
• Lower the set temperature by a degree or two when you are away for a few days, if your manual allows it.

Warehouse clubs and big-box retailers can sell hot tubs cheaply because they buy in high volume and cut out the dealer margin. Their range is usually limited and seasonal, so choice can be narrow. Their 'cheap' hard shells still cost far more than inflatables, so compare them with the price bands above.

How do you use a hot tub safely?

A cheap tub heats to the same temperatures as an expensive one, so the same safety rules apply. Keep the water no hotter than 40°C and follow the guidance in your manual.

Limit sessions to about 15 minutes at or near 40°C. Then get out, cool down and drink some water before you go back in. For longer, gentler soaks, lower the temperature to about 37-39°C (99-102°F).

The 15-minute limit is especially important for first-time users. If you have not used a hot tub before, you do not yet know how your body reacts to hot water, so start with shorter sessions and get out sooner if you feel uncomfortable.

Staying in hot water for too long can cause overheating, also called hyperthermia. Signs include dizziness, nausea and feeling faint. If you notice any of these, get out of the tub carefully, sit somewhere cool and drink water. If the symptoms do not settle, seek medical advice.

Check with your GP before using a hot tub if any of the following apply to you. If you are pregnant, speak to your midwife or GP. The NHS has general health guidance for each of these conditions.

• You are pregnant. High water temperature can raise your body temperature in a way that may harm an unborn baby.
• You have heart disease or high blood pressure. Heat makes the heart work harder and affects blood pressure.
• You have diabetes. Diabetes can reduce sensitivity to heat in the skin, which raises the risk of burns without you noticing.
• You have open wounds or a skin infection. Broken skin raises the risk of waterborne infections such as Pseudomonas and Legionella.
• You have recently had surgery.

Do not use a hot tub after taking medicines that cause drowsiness, such as sedatives or some antihistamines. Drowsiness in hot water raises the risk of falls and drowning. If you are not sure whether a medicine causes drowsiness, read the leaflet or ask a pharmacist.

Some blood pressure medicines can also cause drowsiness or dizziness, and hot water can make dizziness worse. If you take medicine for blood pressure, check the leaflet before using a hot tub and ask your pharmacist or GP if you are unsure.

Some people with fibromyalgia find that soaking in warm water eases muscle pain and stiffness and helps them sleep. Results vary from person to person, so if you have fibromyalgia, speak to your GP before you start using a hot tub.

Spending less now without paying more later

A cheap hot tub is a fair choice if you know what you are giving up. Inflatables suit occasional, warm-weather use. For year-round use, insulation, a well-fitting cover and UK parts support matter more than the number of seats or lights.

Work out the yearly cost, not just the price on the label. Check for the red flags before you pay, and if you consider a used tub, inspect it while it is running and budget for moving, wiring and a thorough clean.

Frequently asked questions

What is the cheapest way to start using a hot tub?

An inflatable tub on a 13A plug has the lowest upfront cost, because it needs no electrician and no permanent base. Budget for a ground mat, test strips, sanitiser and spare filters on top of the price. If you plan to use it often in winter, compare its yearly running cost with a well-insulated hard shell before you decide.

Can I use a cheap inflatable hot tub in winter?

Some owners do, but heat loss is much higher in cold weather and the heater may struggle to keep up, especially in wind. Many manufacturers give a minimum outdoor temperature in the manual. Keep the cover on whenever the tub is not in use, add insulation underneath, and drain and store the tub if your manual advises it for freezing conditions.

Why do two tubs with the same number of seats cost so differently?

The difference is usually in the parts you cannot see: insulation, heater size, pump quality, the cover and the shell construction. Warranty length and UK parts support also add to the price. Ask each seller for the full specification sheet, then compare those details side by side instead of comparing seats, jets and lights.

Can I make a cheap hot tub more efficient after buying it?

Yes, to a point. A thicker or better-fitting cover, a floating thermal blanket, an insulated base and a wind shelter can all reduce heat loss. Heating during off-peak hours can lower costs if your tariff allows it. These steps help, but they cannot fully make up for very thin insulation built into the tub itself.

Is it safe to buy a cheap hot tub from an online marketplace?

It can be, but check the electrical equipment carefully. Look for UKCA or CE marking, a brand and model number on the pump and heater, a manual and RCD protection. Be wary of very low prices for unknown brands with no UK contact details. If anything looks damaged or modified, do not plug it in and ask a registered electrician.

Does a small, cheap tub need different water care?

The targets are the same as for any tub: free chlorine 3-5 ppm or bromine 3-5 ppm, pH 7.2-7.6, total alkalinity 80-120 ppm and calcium hardness 150-250 ppm. Because there is less water, levels change faster, so test before each use and add chemicals in small amounts. Keep the water no hotter than 40°C and follow your manual.