Mattress Warranty Explained: What Counts as a Defect and What Voids It

Affiliate disclosure: We earn a commission when you buy through links on this page, including as an Amazon Associate and eBay Partner Network affiliate, at no extra cost to you. We don't invent test results or prices, so always check the current listing.

A mattress warranty generally covers defects in materials or workmanship, such as an impression that goes past a stated depth, and it usually does not cover comfort complaints, normal softening or damage from stains or misuse. Terms vary by maker, so read the document before you buy. A trial period handles "I do not like it." A warranty handles "it failed too soon."

Warranty versus sleep trial

People mix these up. A sleep trial lets you return or exchange a bed that does not suit you, usually within a window and under conditions. A warranty protects you against a defective product over a longer period. If you want out because the bed is too firm, that is the trial. If the bed sags prematurely, that is the warranty. Our trial policies guide covers the first, and this article covers the second.

What federal warranty rules say

The Federal Trade Commission summarizes several rules that apply to warranties on consumer products. As of October 2026, its guidance says:

• Sellers must make the written warranty available before purchase. In a store it should be readily available, and an online warrantor can post its terms and provide a non-internet way to request a copy.
• A warranty is labeled "full" only if it meets a set of conditions, including free service and a choice of replacement or refund after repeated failed repairs. If any condition is missing, it is "limited."
• A warranty generally cannot require you to buy a specific company's product or service to keep coverage, with limited exceptions. The warrantor can still deny coverage for damage caused by parts or service it did not provide.

That is a summary of a business guide, not legal advice. For a dispute, contact the maker first, and consider a consumer-protection agency.

What usually counts as a defect

Warranty documents differ, so read your own. These are the types of problems that coverage typically addresses:

• Impressions or sagging beyond a stated depth when no one is lying on the bed.
• Broken or protruding springs in coil constructions.
• Split seams or zipper failure that expose the interior.
• Foam that cracks or deteriorates beyond normal wear.

The impression test is the one most people end up using. The document will say how deep and how to measure, often with a straight edge across the dip. Our sagging guide shows how to check it, and you should write down the figure in your document before you buy.

What it usually does not cover

• Comfort changes, such as the bed feeling softer than you expected.
• Normal break-in softening, which is why breaking in a bed matters.
• Stains, spills and soiling.
• Damage from misuse, from an unsuitable base, or from unauthorized repairs.
• Shipping or removal costs, in some documents.

These exclusions are common but not universal. The clauses that surprise buyers are the stain clause and the base requirement, so look for both.

What can void coverage

Think of these as clauses to look for, not as promises that every maker uses them.

• Stains. A stained mattress may be refused for inspection. A protector helps; see mattress protectors.
• Wrong foundation. Some documents set requirements for slat spacing or support. See do you need a box spring.
• Missing or altered labels. Some require tags to stay attached, so read before you cut anything off.
• Unsanitary conditions or commercial use where excluded.
• Repairs by anyone but the maker if the document says so.

Prorated and non-prorated coverage

A prorated warranty covers the repair or replacement for only part of its term, and you pay a rising share of the cost later. A non-prorated warranty covers the whole thing for the stated period. The document should say which applies, and for how long. Also ask who pays for shipping and removal, since those costs can decide whether a claim is worth making.

What to read before you buy

The best time to read a warranty is before the card is charged. Open the document and find five things: the sag depth that counts as a defect, whether coverage is prorated, what the base requirement is, what the stain clause says, and who pays for shipping and removal. If any of those are missing from the page, ask the seller to send the full document by email and keep the reply.

How to make a claim without losing it

1. Keep the receipt, order confirmation and warranty document.
2. Photograph the problem with a straight edge and a tape measure in the shot.
3. Remove sheets and any topper so the bed can be inspected, and keep the bed clean.
4. Contact the seller or maker using the instructions in the document, and keep copies of every email.
5. Ask in writing what happens next, and how long it takes.

Buying from a store or a marketplace can change who handles the claim, so see buying online vs in-store. A fitted protector from day one keeps the stain clause from becoming a problem.