MCC Code
5300
Category
Wholesale Clubs
Reward Category
Other
Confirmed by
1 users
Costco.com purchases code as 5300 Wholesale Club just like in-store Costco. No grocery bonus, no retail bonus applies. Also, Costco.com exclusively accepts Visa, so Mastercard and Amex holders cannot shop online at Costco at all.
Best cards for Costco.com (online)
BofA Customized Cash
2% back on grocery & wholesale
2% back
Costco Anywhere Visa
2% back on Costco purchases
2% back
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Search PreSwipe →Frequently asked questions
What MCC code does Costco.com (online) use?
Costco.com (online) uses MCC 5300 — Wholesale Clubs. This is the four-digit Merchant Category Code assigned to Costco.com (online) by card networks and determines how your purchase is categorized for rewards.
Does Costco.com (online) count as wholesale clubs for credit card rewards?
Costco.com (online) does not code as you might expect. It uses MCC 5300 (Wholesale Clubs), which may not trigger the bonus category you're hoping for. Always check your card's terms.
Which credit card earns the most rewards at Costco.com (online)?
The best card depends on how Costco.com (online) codes. Since it uses MCC 5300 (Wholesale Clubs), look for cards that offer bonus rewards in that category. Check the card recommendations above for the top options.