How Often Should You Replace Your Mattress? A UK Guide

The short answer: most UK advice says every 7 to 10 years. Which? recommends replacing your mattress every 8 to 10 years, and the bed industry's long-standing advice is 7 to 8. But a date on a calendar can't feel your back. Plenty of mattresses are finished at five, and plenty are still supportive at twelve. The better question is what has worn out: the support underneath you, or just the comfort on top.

Want an answer for your mattress, not an average? Take our free 3-minute mattress check

What the guidance actually says

• Which? recommends replacing a mattress every 8 to 10 years. In a February 2026 survey of 1,029 of its members, nearly half had kept their last mattress longer than that.
• The National Bed Federation, the UK bed makers' trade body, and its consumer arm The Sleep Council have advised replacing every seven to eight years, roughly 20,000 hours of use.
• People are replacing sooner. NBF consumer research in 2019 found the average replacement interval had fallen to 6.9 years, from 7.9 in 2016. In 1995 it was around 17 years.

Those numbers are useful as a prompt. They are not a verdict. A heavier sleeper on a thin foam mattress wears it out faster than a light sleeper on a deep pocket-sprung one, and a mattress that is turned and rotated lasts longer than one that never moves.

Why age is the wrong test on its own

A mattress does two jobs. The support layers, usually springs or dense foam, hold your spine in line. The comfort layers on top let your shoulders and hips settle in. They wear at different speeds.

• When support fails you see it: a dip where you sleep, springs you can feel, rolling towards your partner. No topper fixes that. It is time to replace.
• When only comfort is the problem, the mattress feels too hard, too thin or hard on your hips, but it is still flat and supportive. That is the case a topper is made for, at a fraction of the cost of a new mattress.

We wrote a whole guide on telling these apart: signs you need a new mattress, and the ones that only need a topper.

A quick way to check yours tonight

1. Strip the bed and lay a broom handle across it where you sleep.
2. Measure the biggest gap under the handle. Under 2.5 cm is normal wear. 2.5 cm or more means the support is going.
3. Feel for springs or lumps and look for stains, smells or mould you can't clean out.
4. Check the base. Broken or bowed slats make a good mattress feel worn. Lay the mattress on the floor for a night: if the dip disappears, it was the base.
5. Think about how you wake. Stiffer than you went to bed, and better in hotel beds? That points at the mattress.

Or let us do the sums: our revive or replace check asks these questions, adds your weight and how you sleep, and gives you a verdict with the reasons.

How to make a mattress last longer

• Rotate it head to foot every three months. If it is double-sided, turn it over too.
• Use a washable protector, and air the mattress when you change the sheets.
• Keep the base sound. Slats more than about 7 cm apart let a mattress sag between them.
• Add a comfort layer before it wears through. A topper takes the daily compression that would otherwise wear the mattress's own comfort layers. See toppers for a firm mattress and our depth guide.

When replacing is the right call

We sell toppers, so you might expect us to say revive every time. We don't. If the dip is deep, the springs have gone, or the mattress is past ten years and showing wear, replace it, and choose for how you sleep rather than for the showroom. When it goes, keep it out of landfill: here is how to dispose of a mattress in the UK.

Where to go next

• Free mattress check: revive, replace, or neither, in 3 minutes.
• Can a topper fix a sagging mattress? The honest answer.
• The 10-point mattress audit: the full inspection, step by step.
• The Organic Topper: made with GOLS-certified organic latex, Plush or Supportive, every UK size.

Sources

1. Which?, 4 warning signs your mattress needs replacing (August 2026).
2. Furniture News, reporting National Bed Federation research, Mattress replacement cycle shortening, says NBF (April 2019).
3. Which?, How to dispose of a mattress (October 2026).

How we wrote this: thought by people, made efficient with technology. We used AI tools to help research and draft. Every figure was checked against the sources listed, and the founder edited the piece before publishing. Spotted an error? Email hello@notswisscheese.co.uk.