The rule: the 8-year rule.
If your mattress is 8 or more years old and you are waking up sore or seeing visible sagging, replace it. Under 8 years with no symptoms, keep it.
Mattresses wear out from the inside. The support layers break down a little every night, and by year 8 most have lost the firmness they started with. A good mattress lasts 7 to 10 years — after that you are sleeping in a hammock, not on a flat surface, and your back pays for it.
Age alone is not the whole story. A 6-year-old mattress that leaves you stiff every morning is done. A 9-year-old one you sleep great on can wait a little longer. But at 10 years, replace it no matter what — the support is gone even if you have not felt it yet.
Educational estimate only. Based on YOUR age of mattress in years, whether you wake up sore or stiff, and visible sagging or lumps you enter. Uses 8-year rule: 8+ years old with morning soreness or visible sagging = replace it. 10+ years old = replace it, no questions asked. Under 8, sleeping fine, no sagging = keep it. Not medical advice.
Disclaimer: Educational only, not professional advice. Get quotes from licensed, reputable contractors.
Frequently Asked Questions
What is the 8-year rule for mattresses?
If your mattress is 8 or more years old and you are waking up sore or seeing visible sagging, replace it. Under 8 years with no symptoms, keep it.
When should I replace my mattress?
If 8+ years old with morning soreness or visible sagging, or 10+ years old regardless, replace it. Mattresses last 7 to 10 years.
Does age alone determine it?
No — a 6-year-old mattress that leaves you stiff every morning is done, while a 9-year-old one you sleep great on can wait a little longer. But at 10 years, replace it no matter what.
When should I ignore this rule and talk to a professional?
This is educational only, not professional advice — get quotes from licensed, reputable contractors.
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