Buy a topper if your mattress is only a little too firm or too soft but the support core is still solid. Buy a new mattress if it sags more than an inch, makes you ache, or is over about eight years old. A topper changes feel; it cannot rescue a worn-out core.
When your bed is not comfortable, the cheaper fix is tempting, but a topper only helps in specific cases. Here is how to decide. For the replacement option, see our mattress buying guide.
When a topper is enough
A topper works when the support core is still sound and you only need to adjust the feel: softening a too-firm bed, adding a little plushness, or cooling a hot surface. See our topper buying guide for the right type.
When you need a new mattress
Replace the bed if it sags more than an inch, you wake stiff and sore, there are lumps or a failing edge, or it is past seven to ten years old. A topper laid over a sagging core just sinks into the same dip. Our replacement guide lists every warning sign.
Cost comparison
A quality topper costs a fraction of a new mattress and can buy a year or two of comfort, but spending on a topper for a dead mattress wastes money. If the core is gone, put the budget toward a new bed.
Quick rule
Good core, wrong feel, buy a topper. Worn-out core, buy a mattress. Browse toppers in our topper reviews.
Frequently asked questions
Can a mattress topper fix a sagging mattress?
No. A topper changes the surface feel but sinks into an existing sag. If the core sags more than an inch, you need a new mattress.
Is it cheaper to buy a topper or a new mattress?
A topper costs far less and can extend comfort for a year or two, but only if the support core is still good. Spending on a topper for a worn-out bed wastes money.
When should I replace instead of adding a topper?
Replace when the mattress sags, causes morning aches, has lumps or a weak edge, or is over seven to ten years old.
