Yes — Costco takes mattresses back, even opened and used. Under its 100% Satisfaction Guarantee you can return a mattress for a full refund at any time: there is no 90-day limit, no restocking fee, and no receipt required because every purchase is linked to your membership number.
Online orders qualify for a free scheduled freight pickup from your home, or you can bring the mattress to any warehouse returns desk. The one real catch: Costco Next mattresses are sold by third-party brands and can follow that brand’s return terms instead.
Last verified September 14, 2026 against Costco’s published return policy.
Comparing stores? See our 2026 mattress return policy comparison for Costco, Amazon, IKEA, Walmart, Mattress Firm, Sam’s Club and Wayfair side by side.
Costco mattress returns at a glance
| Question | Answer |
|---|---|
| Opened or used mattress? | Accepted — full refund |
| Time limit? | None (not part of the 90-day electronics window) |
| Receipt required? | No — purchases are tied to your membership number |
| Online (Costco.com) return | Free home pickup scheduled by Costco, or any warehouse |
| Warehouse purchase return | Returns desk at any Costco warehouse |
| Restocking or pickup fee? | None |
| Main exception | Costco Next third-party items; abuse of the guarantee |
Do you need the receipt?
No. Costco links every purchase to your membership number, so the returns desk can pull up the transaction even years later. If you bought online, the order confirmation email or the order history in your Costco.com account does the same job. Bring photo ID and the card you paid with to speed the refund up.
Opened and used mattresses: what’s actually allowed
Costco’s 100% Satisfaction Guarantee treats a mattress like any other general merchandise: you can sleep on it for weeks or months and still return it if it isn’t working for you. There is no break-in requirement and no minimum or maximum trial window. Two practical limits apply: the mattress should be in sanitary condition, and Costco does monitor the guarantee for abuse — repeated returns can get flagged on a membership account.
Online vs warehouse returns
Bought in a warehouse
Bring the mattress to the returns desk at any Costco warehouse — it does not have to be the store where you bought it. A full-size mattress won’t fit in most cars, so many members rent a truck or borrow one; Costco does not offer pickup for warehouse purchases.
Bought on Costco.com
Start the return in your Costco.com account or by calling customer service. Costco will schedule a freight carrier to collect the mattress from your home at no charge, and the refund is issued once the return is processed. You also have the option of dropping it at a warehouse returns desk if that’s faster for you.
Exceptions and fine print
- Costco Next: these mattresses are sold and shipped by partner brands through Costco’s site. The brand’s own return policy can apply, so read the item page before ordering.
- Condition: returns in unsanitary or heavily damaged condition can be declined.
- Guarantee abuse: Costco reserves the right to refuse returns from accounts with a pattern of excessive returns.
- Marketplace and special-order items may carry their own terms; standard in-warehouse and Costco.com mattresses are covered by the guarantee.
Membership and refund issues
- Refund method: the refund goes back to the original payment method in full — no restocking or pickup fees.
- Executive membership: the 2% reward earned on the purchase is reversed when the refund posts.
- Lapsed membership: you generally need an active membership to process a return, since the purchase lookup runs through your membership number. If yours has expired, renew it first or speak with the membership desk.
- Who bought it matters: returns are processed against the purchasing membership, so the member who bought the mattress should be the one returning it.
Before you buy another Costco mattress
Use the return policy as one part of the decision—not the only part. Compare the exact model, delivery and pickup logistics, warranty, and the price available on the day you buy.
Best Costco mattresses · Costco mattress sale calendar · Compare tested mattresses · Visit the Yawnder showroom
Official source: Costco Return Policy.
Frequently asked questions
Can you return an opened or used mattress to Costco?
Yes. Costco accepts opened, slept-on mattresses for a full refund under its 100% Satisfaction Guarantee. There is no requirement that the mattress be in its original packaging, and no set time limit.
Do you need a receipt to return a mattress to Costco?
No. Every purchase is tied to your membership number, so the returns desk can look up the transaction without a paper receipt. For Costco.com orders, your order confirmation email also works.
How do you return a mattress bought on Costco.com?
Start the return through your Costco.com account or contact customer service, and Costco will schedule a freight pickup from your home at no charge. You can also bring it to any warehouse returns desk.
Is there a time limit on Costco mattress returns?
No. Mattresses are not part of Costco’s 90-day electronics return window. The 100% Satisfaction Guarantee has no stated deadline, though returning within a reasonable period and in sanitary condition is expected.
Does Costco charge any fee to return a mattress?
No restocking or pickup fees apply to mattress returns. The refund goes back to your original payment method in full.
What about Costco Next mattresses?
Costco Next items are sold and shipped by third-party brands through Costco’s site, and the brand’s own return terms can apply instead of Costco’s standard policy. Check the item page before buying.
Can Costco refuse a mattress return?
Yes, in rare cases. Costco monitors its satisfaction guarantee for abuse, and mattresses returned in unsanitary or heavily damaged condition may be declined.
Rather not gamble on a return? Every mattress we sell has been tested in person, and our returns are handled locally.