How Often Should You Change Your Mattress?

Quick Answer: If you are wondering how often to change your mattress, most mattresses should be assessed after about seven to ten years, though the right time to replace yours depends on its condition, support, and how well you sleep.

Why Mattresses Don't Last Forever

A good mattress is designed to support you night after night, but no mattress keeps exactly the same feel forever. Its materials respond repeatedly to body weight, movement, heat and pressure, gradually changing how the mattress feels and performs.

Foams can soften, springs can lose some responsiveness, and comfort layers may compress. Because these changes usually happen slowly, mattress wear can be easy to miss. You may simply get used to a bed that no longer feels as supportive as it once did.

That is why age is a useful guide, but it should never be the only thing you consider. The more important question is whether your mattress still gives you the comfort and support you need for a good night's sleep.

The Average Lifespan of a Mattress

No single lifespan applies to every mattress. As a broad guide, many mattresses are replaced somewhere around the seven to ten-year mark. Some may need replacing earlier, while a well-cared-for mattress that still feels supportive may last longer.

How quickly a mattress ages depends on its construction, materials, frequency of use and how well it has been cared for. A spare-room mattress, for example, will usually experience far less wear than one slept on every night.

Rather than treating a particular birthday as an automatic expiry date, use age as a prompt to pay closer attention. If your mattress is approaching the later years of its expected life, check how it looks, how it feels and, importantly, how you feel when you wake up.

Signs It's Time to Replace Your Mattress

The clearest sign that a mattress needs replacing is not simply the number of years you have owned it. It is a noticeable decline in comfort, condition or support.

Visible Sagging or Lumps

A mattress should provide a relatively even sleeping surface. If you can see deep dips, sagging or obvious lumps that remain after you get out of bed, the internal materials may no longer be recovering as they once did. You might also notice that you naturally roll towards one particular part of the mattress because a depression has formed. Minor impressions can occur through normal use, but pronounced or persistent changes to the sleep surface are worth paying attention to.

Waking Up with Aches or Stiffness

If you regularly wake up with aches or stiffness that ease once you get moving, your mattress may not be supporting you as effectively as it used to. Aches can have many causes, so a mattress should not automatically take the blame. However, if you sleep noticeably better elsewhere or have become less comfortable in bed, it is worth assessing your sleep surface.

Increased Allergies or Dust Sensitivity

Mattresses naturally come into contact with skin cells, perspiration, dust and everyday bedroom debris. Regular cleaning and a suitable mattress protector can help keep the sleep environment fresher, but an older mattress can become harder to maintain in the same condition. If you have noticed increased sensitivity around bedtime, consider the wider sleep environment too, including bedding, pillows, bedroom ventilation and cleaning frequency.

Noisy or Unsupportive Feel

Some mattresses become noticeably noisier as they age, particularly those containing springs. New creaks, squeaks, or movement can signal that components have changed through prolonged use. More important than noise alone is the feeling of support. If the mattress feels flatter, less responsive, unstable at the edges or simply less comfortable than it once did, replacing it may make more sense than trying to adapt your sleeping position around it.

Does Mattress Type Affect Lifespan?

Mattress construction can influence how it changes over time. Different materials respond to repeated pressure in different ways, so there is no perfectly universal replacement schedule.

Mattress type	What may change with age	What to watch for
Memory foam	Foam may gradually soften or develop lasting impressions	Dips, reduced support or a noticeably softer feel
Hybrid	Both foam comfort layers and spring systems experience repeated use	Sagging, uneven support, noise or changes in responsiveness
Pocket sprung	Springs and upholstery layers can gradually lose their original feel	Dips, creaking, reduced edge support or unevenness
Other foam mattresses	Comfort and support foams may compress at different rates	Permanent impressions or reduced resilience

 

The quality of the individual mattress matters just as much as its category. Two mattresses described as the same type can use different materials, layer structures, and manufacturing methods, so they shouldn't automatically be expected to age in exactly the same way.

How Sleep Quality Changes as a Mattress Ages

Mattress ageing is often gradual, and that can make changes to sleep quality surprisingly difficult to spot. You may start moving around more at night to find a comfortable position. You might wake more frequently, feel warmer in certain areas, or notice that the mattress no longer relieves pressure in the way you remember. If you share a bed, changes in motion or support can also become more noticeable as the mattress gets older.

People adapt to gradual changes. You may compensate by changing position, adding extra pillows or simply accepting poorer sleep. Instead of asking whether the mattress is technically still usable, ask whether you still sleep comfortably, feel properly supported and wake reasonably refreshed.

How to Extend the Life of Your Mattress

Good mattress care cannot stop normal ageing, but it can help prevent avoidable wear and keep the sleeping surface in better condition. Start by following the care instructions provided for your mattress. If rotation is recommended, keep to the suggested schedule so the same areas are not taking all of the pressure night after night. Not every mattress is designed to be flipped, so do not turn it over unless the manufacturer specifically says you should.

A mattress protector is another simple layer of defence. It helps protect the mattress surface from spills, moisture and everyday debris, making it easier to keep the bed clean. Regular cleaning matters too. Vacuuming the mattress surface when appropriate, washing your bedding regularly and dealing with spills promptly can all help maintain a fresher sleep environment. For a more detailed routine, see our guide to cleaning your mattress.

It is also worth checking the conditions of your mattress warranty. Protector use, rotation and appropriate bed-base requirements may form part of the care conditions, so following the manufacturer's guidance is important if you ever need to make a valid claim.

What to Do with Your Old Mattress

Replacing a mattress leaves you with one very practical question: what happens to the old one? A mattress is large, bulky and not something you should simply leave beside your household bin. Depending on where you live, options can include council bulky-waste collection, a local recycling facility or a retailer collection service.

Recycling is worth exploring because mattresses contain multiple materials that may be recoverable rather than sent straight to landfill. True Rest mattresses are recyclable, so when the time eventually comes to replace yours, look for a responsible route that allows the mattress materials to be processed appropriately.

How Long Does a True Rest Mattress Last?

There is an important distinction between how long a mattress may remain comfortable and how long its warranty runs. True Rest mattresses come with a 10-year warranty. That gives you long-term cover for qualifying manufacturing defects under the warranty terms, but it should not be interpreted as a guarantee that every mattress will feel exactly the same, or remain equally comfortable and supportive, for a full ten years.

Mattress comfort changes with use, and normal wear is different from a manufacturing defect. How long your own mattress feels right for you will depend on its condition, how it is used and how well it has been cared for. The best approach is therefore to combine both pieces of information. Keep your warranty details, follow the required care instructions and assess your mattress on how it is actually performing. A 10-year warranty provides valuable protection, while the condition of the mattress tells you when it may be time to consider replacing it.

Conclusion

So, how often should you change your mattress? Seven to ten years is a useful general guide, but there is no need to replace a mattress purely because it reaches a certain age. Pay attention to the signs instead. Persistent sagging, reduced support, new lumps, noise and a noticeable decline in sleep comfort can all suggest that your mattress is nearing the end of its useful life for you.

Looking after your mattress properly can help it perform at its best for longer. Protect it, clean it, rotate it where instructed and check it periodically rather than waiting until sleep becomes uncomfortable. Ultimately, a mattress is there to support good rest. If yours is no longer doing that job as well as it once did, replacement may be a worthwhile investment in the part of every day you spend asleep.

Frequently Asked Questions (FAQs)

How do I know if my mattress is too old?

Age is only one clue. Look for physical changes such as sagging, dips, lumps or reduced edge support, as well as changes in how you sleep. If the mattress feels less supportive, you wake uncomfortable or you consistently sleep better on another bed, it may be time to consider a replacement.

Can a mattress protector extend its lifespan?

A mattress protector can help keep the surface cleaner by reducing direct exposure to spills, moisture and everyday debris. It will not prevent the internal materials from ageing, but it can form an important part of good mattress care. Always check the care and warranty conditions for your specific mattress.

Does a 10 year warranty mean my mattress lasts 10 years?

No. A 10-year warranty and a 10-year mattress lifespan are not the same thing. True Rest's warranty covers qualifying manufacturing defects under its terms. It does not promise the mattress will remain equally comfortable or supportive for the full 10-year period. Normal wear and changes in comfort through use are separate from manufacturing defects.

Is it bad to sleep on an old mattress?

An older mattress isn’t automatically unsuitable simply because of its age. The key issue is its condition and whether it still provides comfortable, even support. If it has significant sagging, damage or a noticeable loss of support, replacing it may help you create a more comfortable sleep setup.

What should I do with my old mattress when I replace it?

Avoid treating an old mattress as ordinary household waste. Check council bulky-waste services, local recycling facilities or available collection options. True Rest mattresses are recyclable, so using an appropriate recycling route can help ensure recoverable materials are handled more responsibly.