Does Costco Price Match Amazon?

No. Costco says it does not price match with other retailers, and its Costco.com price match policy repeats that it does not price match other businesses or retailers. That means Amazon prices are out. The practical alternative is Costco's own post-purchase price adjustment process when Costco lowers its own price within the allowed window.

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What Costco's policy says

Costco's customer-service guidance is direct: the company says it does not price match other retailers because it aims to offer competitive prices at the point of purchase. On the separate Costco.com policy page, Costco again states that it does not price match other businesses or retailers, which is the part that answers the Amazon question most clearly.

What Costco will do instead

Costco does offer a limited way to recover a lower price after you buy. According to its official price match page for Costco.com orders, purchases that drop in price within 30 days can be eligible for a price match with Costco's own lower price. That is not a competitor match. It is a Costco-to-Costco adjustment.

When a Costco.com price adjustment may work

Situation	What Costco says
Amazon or another retailer is cheaper	Not eligible for a Costco price match.
Your Costco.com item drops in price within 30 days	Usually eligible, subject to policy limits.
Warehouse price is lower than Costco.com	Not eligible for a Costco.com price match.
Gold bullion purchase	Not eligible.
Promotion with specific sale dates	Request must be within the promo dates and within 30 days of purchase.

How warehouse purchases fit in

Costco's policy page says warehouse purchases should be handled at the Returns counter in the warehouse where you bought the item. Costco does not publish a separate competitor-matching rule for warehouses that would override the chainwide no-competitor-match position, so the cautious reading is the same: warehouse purchases may be adjusted against Costco's own lower price, not Amazon's.

Why Amazon comparisons are difficult anyway

Even beyond Costco's no-match rule, Amazon is not a single-price seller in many cases. Amazon's own help page explains that many items are sold by third-party sellers and that multiple sellers can offer the same product at different prices on one product page. Each seller sets its own price, which can differ from other sellers offering similar items. That makes an "Amazon price" less clear-cut than a single warehouse shelf price.

Best ways to save if Amazon is cheaper

Check whether Costco itself lowered the price within 30 days and submit a request through the Costco.com price match page.
Review the order summary first, because Costco notes that a promotional price may already have been deducted from your order.
If the Costco purchase no longer makes sense, review the official return policy rather than assuming a competitor match is available.

What not to assume

Do not assume Costco will match Amazon because the item looks identical, because the Amazon listing says Prime, or because the price drop happened after you bought at Costco. Costco's published rule is narrower: competitor matching is out, and Costco's own-price adjustments are limited by timing, product type, and promotion rules.

Bottom line: Costco does not price match Amazon

If you want a direct answer, it is no. Costco's official customer-service pages say the company does not price match other retailers, which includes Amazon. Your only real Costco-side workaround is a limited price adjustment when Costco lowers Costco's own price within the allowed period.