How Long Does a Mattress Last? When to Replace It and How to Make It Last Longer

Where the "Seven-Year Rule" Comes From

The figure most people quote traces back to the Better Sleep Council, the consumer arm of the International Sleep Products Association, the trade group for mattress makers. Its guidance says most mattresses have a life span of around seven years, and that people tend to keep theirs for about ten.^[1] Use it as the point to start checking your bed, not a test result.

What people actually do varies a lot by age. In the council's 2022 survey, the average time a previous mattress was kept was 8.3 years, down from 9 years in 2020. Millennials had replaced theirs after 5.7 years on average, while boomers had kept theirs for 12.3 years.^[2]

Research on bed age is thin. In a 2008 study, 62 adults slept on their own beds, which averaged 9.5 years old, and then on new medium-firm bedding for 28 nights each. They reported better sleep quality and comfort and less back and shoulder discomfort on the new beds, and the authors suggested timely replacement may help sustain sleep quality.^[3] The limits matter: everyone knew which bed was new, and no group kept its old bed for comparison. We could not find a controlled study that tested replacing a mattress at a set age. Our back-support guide covers what the wider research says about mattresses and comfort.

What Actually Wears Out, Layer by Layer

A mattress doesn't age evenly. The layers nearest you work hardest, so they change first, and the core underneath decides whether the bed still holds you up. If you are unsure what your mattress is built from, the mattress materials guide explains each layer.

• Comfort foams soften and lose a little height where your shoulders and hips rest. Density, the weight of foam per cubic foot, is the main clue to how well a foam holds up. The Polyurethane Foam Association notes that higher-density foams typically keep their original properties better, and that density and firmness are separate: a dense foam can be soft, and a light one can be firm.^[4]
• Latex is springy and tends to recover its shape well, though its surface still compresses gradually under nightly use.
• Pocket coils carry the load in a hybrid. Wear usually shows as softer zones where you sleep, a weaker perimeter, or, late in life, springs you can feel or hear.
• Quilting and fiber fill in a euro or pillow top flatten fastest of all. A shallow impression there is normal settling; our guide to mattress tops explains how each top wears.
• The base is the part people forget. A sagging box spring, missing center leg, or slats spaced too far apart lets the mattress bow, and the mattress gets blamed for it.

Construction	Where wear tends to show first	What to look at when you buy
All-foam	Body impressions in the comfort layers under the hips and shoulders	Foam densities for each layer, and the thickness of the support core
Foam or latex hybrid	Softening of the top layers; later, a weaker edge or softer coil zones	Coil count and zoning, edge reinforcement, and the comfort-layer materials
Innerspring with a plush top	The quilted top flattening; with age, coils felt through the padding or squeaking	How much fill is in the top, and whether the coils are individually wrapped

Charts online give exact lifespans for each mattress type, but we have not found a test behind those numbers. The build quality of the specific mattress matters more than its category.

What Wears a Mattress Out Faster

• Load in one spot. Two sleepers, a heavier body, or a pet that always takes the same corner all concentrate pressure where the bed compresses most.
• The wrong base. Our warranty, like most, excludes damage from an incorrect, old, or mismatched foundation, and it requires a rigid center support that reaches the floor under queen and king sizes.
• Moisture. Spills, sweat, and damp rooms soak into foam and fabric. Stains can't be fully cleaned out, and they void our warranty.
• Never turning it. Sleeping in exactly the same place for years wears a groove that rotation would have spread out.
• Rough handling. Jumping on the bed, folding or bending the mattress, or dragging it by the handles strains seams, coils, and foam.

Signs of a Worn-Out Mattress, and What to Try First

Most problems have a cause you can check before you replace anything. Work through the table from left to right:

What you notice	Likely cause	Try this first
A dip where you sleep, or a ridge down the middle	Comfort layers compressed, or the base sagging underneath	Measure it (next section), then check the base without the mattress on it
You roll toward the center or toward your partner	Uneven wear, or a frame without center support	Rotate the mattress and add or tighten a center support leg
The edge drops when you sit on it	Perimeter foam or edge coils softened	Vary where you sit; if it keeps getting worse, measure and compare with the warranty
Lumps, or fill bunched in one area	Quilting or fiber fill shifted	Rotate it and smooth the top by hand; persistent lumps in the foam are a defect worth reporting
Squeaks or creaks when you move	Often the frame or box spring, not the mattress	Put the mattress on the floor for a night; if the noise stops, fix or replace the base
You feel or hear individual coils	Comfort layers worn thin over the springs	A topper may help briefly, but this usually means the mattress is near the end of its life
You wake stiff or achy and sleep better elsewhere	The bed may no longer suit you, or may have worn	The Better Sleep Council lists both as signs to reassess your mattress[1]; rule out the base and a new pillow first
Stains, odors that won't clear, or tears in the fabric	Moisture or damage to the cover and materials	Spot-clean what you can; damage that won't clean up is a reason to replace

How to Measure a Sag Before You Call It

"It feels saggy" is hard to act on. A measurement gives you a number to compare with your warranty, and it takes five minutes:

1. Strip the bed down to the bare mattress, including the protector and any topper.
2. Lay a straight edge across the mattress at the deepest point, side to side. A long level, a broom handle, or a taut piece of string tied between two heavy books all work.
3. Measure the largest gap between the straight edge and the surface with a ruler or tape measure.
4. Check the base. Lift the mattress off and look at the frame, slats, box spring, and center support. If the base dips, the mattress will too.
5. Take photos of the straight edge and the tape measure, and find your proof of purchase and the law label (the tag sewn onto the mattress). Warranty claims usually need all three.

Every warranty sets its own depth. The Sleepy Edge 10-year warranty counts body impressions of 1½ inches or less as normal conforming, much like the insoles of a good pair of shoes. Deeper impressions are covered when the mattress has been continuously supported by an appropriate frame, with a rigid center support for queen and king sizes. Keep the law label on, and keep the mattress clean: stains void the warranty.

A Simple Care Routine That Helps a Mattress Last

Care won't stop comfort layers from settling, but it spreads the wear and removes the most common reasons a mattress is retired early.

Day one

• Put a protector on before the first night. A waterproof, breathable protector keeps sweat and spills out of the foam. Our return policy recommends one from day one, too.
• Check the base. Use a frame and center support suited to the size, and replace an old foundation rather than putting a new mattress on a worn one. Our thickness guide covers bed height and sheet depth if you are changing the frame at the same time.
• Let it breathe. If the mattress arrived compressed, unroll it, let it air out, and dispose of all the plastic right away so a child or pet can't get tangled in it.

The first six months

• Rotate it head to foot every two weeks. This is when new comfort layers settle most, and turning it often lets them settle evenly. Ask someone to help.

After that

• Rotate every two to three months.
• Wash the bedding and protector regularly, following their labels.
• Vacuum the surface with an upholstery attachment when you change the protector.
• Clean up spills straight away. Blot, don't rub. Use a small amount of mild detergent in cool water on a cloth, never soak the mattress, and let it dry completely before you make the bed again.

Whenever you move it

Carry it upright on its side without bending or folding it, and store it flat, somewhere clean and dry.

Keep It, Fix It, or Replace It?

Once you have measured and checked the base, the decision is usually clear:

• If the base was the problem, fix the base. A new center support or foundation often brings a mattress back to level.
• If the mattress is even but feels firmer or softer than you would like, a topper is a low-cost adjustment. It changes the feel, not the support, so it suits a bed that is still structurally sound. Our cooling guide compares topper materials if you sleep warm.
• If the dip is deeper than the warranty threshold and the base meets the requirements, contact the maker with your measurements and photos before you buy anything else.
• If it is out of warranty, uneven, noisy, or you consistently sleep better elsewhere, it is time to replace it. Our guide to choosing a mattress walks through what to compare.

If you do replace it, give the new bed time. Your body needs a few weeks to adjust to a different feel, which is why our trial has a minimum. Take 120 nights to decide (we ask for at least 30 to adjust). If it's not the one, we'll pick it up and refund your purchase, minus a $99 return fee. That applies to every online order; details are on our sleep trial page.

What to Do With Your Old Mattress

A mattress is bulky, so plan its exit before the new one arrives:

• In California, Connecticut, Oregon, or Rhode Island, the state's Bye Bye Mattress program, run by the Mattress Recycling Council, offers no-cost drop-off and collection events. It is paid for by a recycling fee collected when mattresses are sold there.^[5]
• Everywhere else, the program's site lists recycling facilities across the country, and recommends contacting your city or waste hauler about bulky-item disposal if none is nearby.^[6]
• Donate only if it is clean and sound, with no stains or tears, and call ahead: some charities don't accept used mattresses.
• Don't leave it in the garage or basement. Our care guidance is to dispose of an old mattress promptly to avoid a fire hazard.