You should replace a mattress roughly every 7 to 8 years — but the reliable signals are physical, not calendar-based: visible sagging, waking with aches you don't have during the day, or sleeping noticeably better in other beds. A good mattress on a poor base ages faster, which is why the two should be assessed together.
Table of contents
- Seven signs your mattress is finished
- Typical lifespan by mattress type
- How to make a mattress last longer
- Don't forget the base
- Frequently asked questions
Seven signs your mattress is finished
- Visible dips or sagging where you sleep — the clearest single indicator.
- Waking stiff or achy, easing within an hour of getting up.
- You sleep better away from home — hotels, guest beds, sofas.
- You feel every movement your partner makes, when you previously didn't.
- Springs are audible or can be felt through the comfort layers.
- Allergies worse at night — older mattresses accumulate dust mites and allergens.
- It's simply old — past 8 years, materials have usually lost their structure even if it looks fine.
Typical lifespan by mattress type
| Type | Typical lifespan | Ages by |
|---|---|---|
| Open coil | 5–7 years | Spring fatigue, comfort layer compression |
| Pocket sprung | 7–10 years | Individual spring failure, filling settlement |
| Memory foam | 7–10 years | Foam softening, permanent body impressions |
| Pillow top | 6–8 years | Top layer compresses before the core |
How to make a mattress last longer
- Rotate head-to-foot every 3 months — the single most effective habit. Flip only if the mattress is double-sided; most modern ones are not.
- Use a protector — keeps moisture and skin cells out of the fillings.
- Support it properly — a sagging or slat-gapped base drags the mattress down with it.
- Air it regularly — pull back the bedding for 20 minutes each morning before making the bed.
- Don't sit on the same edge daily — edges take the heaviest concentrated load.
Don't forget the base
An ageing base shortens a new mattress's life. Slats should be evenly spaced and unbroken; an ottoman or divan platform should be flat and firm. If you are replacing a mattress that has sagged early, check the base before assuming the mattress was at fault — our ottoman mattress guide covers the pairing.
Pocket sprung, orthopaedic and pillow top options in every UK size, with free delivery.
Browse mattresses →Frequently asked questions
How often should you replace a mattress?
Every 7–8 years as a general rule, or sooner if it sags or you wake with aches.
Should you rotate or flip a mattress?
Rotate head-to-foot every three months. Flip only if it is designed to be double-sided.
Can a mattress topper fix a sagging mattress?
No — a topper masks surface feel but cannot restore lost support underneath.
How do I dispose of an old mattress in the UK?
Most councils offer bulky waste collection for a small fee, and many recycling centres accept mattresses — check your local authority's website.
