Sam's Club credit cards do not work at Walmart stores
The Sam's Club Mastercard and the Sam's Club American Express card are issued specifically for Sam's Club members and can only be used at Sam's Club locations, Sam's Club Gas Stations, and on the Sam's Club website. You cannot use either card at Walmart, Walmart.com, or any Walmart subsidiary.
This restriction exists because Sam's Club and Walmart are separate retail operations, even though both are owned by Walmart Inc. The parent company keeps the membership programs and payment systems distinct. If you want to use a credit card at Walmart, you need either a general-purpose card (Visa, Mastercard, American Express, or Discover) or a Walmart-branded card.
The same rule applies in reverse: Walmart credit cards cannot be used at Sam's Club. Each retailer maintains its own card ecosystem tied to its own membership structure.
Key Takeaways
- Sam's Club credit cards work only at Sam's Club locations, Sam's Club Gas Stations, and Sam's Club online — not at Walmart or Walmart.com.
- Walmart and Sam's Club are separate retail operations with separate payment systems, despite both being owned by Walmart Inc.
- If you shop at both retailers, you need a general-purpose credit card (Visa, Mastercard, American Express, or Discover) that works everywhere.
- Walmart credit cards cannot be used at Sam's Club, and the restriction works both ways.
What cards actually work at Walmart
At Walmart and Walmart.com, you can use any major credit card: Visa, Mastercard, American Express, or Discover. You can also use the Walmart Rewards Card (a Mastercard issued by Capital One), the Walmart Rewards Card for business, or the Walmart Store Card (a closed-loop card that works only at Walmart). Debit cards, prepaid cards, and digital wallets like Apple Pay and Google Pay are accepted as well.
If you have a Sam's Club credit card but need to make a purchase at Walmart, you will need to use a different payment method. Carrying a general-purpose card alongside your Sam's Club card solves this problem if you shop at both retailers regularly.
Why Sam's Club and Walmart keep separate card systems
Sam's Club operates as a membership warehouse with a different business model than Walmart's open-to-the-public retail stores. The membership fee and warehouse format create a distinct customer base and pricing structure. Keeping the credit cards separate reinforces this separation and allows each retailer to design rewards and benefits tailored to its own members.
The Sam's Club Mastercard and American Express card offer rewards specific to Sam's Club purchases — cash back on fuel, groceries, and other categories — which would not explore to Walmart transactions. Walmart's cards offer their own rewards structure. Mixing the systems would complicate both programs.
What happens if you try to use a Sam's Club card at Walmart
If you attempt to use a Sam's Club credit card at a Walmart checkout, the card will be declined. The payment system will not process the transaction because the card is restricted to Sam's Club merchants only. This is a technical restriction built into the card's authorization system, not a policy that a cashier can override.
The decline will happen at the point of sale, before the transaction is submitted to the bank. You will need to provide a different payment method to complete your purchase.
Using a Sam's Club card outside Sam's Club locations
The Sam's Club Mastercard can be used at any merchant that accepts Mastercard — restaurants, gas stations, online retailers, and other businesses outside of Sam's Club. The American Express card works at any merchant that accepts American Express. The restriction to Sam's Club locations applies only to those two specific cards when used at retail locations.
This means you can use your Sam's Club Mastercard to pay for groceries at a regular supermarket or to book a hotel online. You straightforward cannot use it at Walmart. The card functions as a standard payment card everywhere except Walmart and its subsidiaries.
If you need one card for both retailers
If you shop regularly at both Sam's Club and Walmart, a general-purpose Visa or Mastercard is the simplest solution. These cards work at both retailers without restriction. You could also carry both a Sam's Club card and a Walmart card, using each at its respective retailer.
Some people choose to use a cash-back rewards card from their bank or a third-party issuer that works everywhere. This approach gives you flexibility across all merchants, though you may miss out on category-specific rewards that Sam's Club or Walmart cards offer at their own stores.
Frequently Asked Questions
Can I use my Sam's Club American Express card at Walmart?
No. The Sam's Club American Express card is restricted to Sam's Club locations and Sam's Club.com, just like the Sam's Club Mastercard. It will not work at Walmart or Walmart.com.
Will my Sam's Club card work at Walmart Gas Stations?
No. Walmart Gas Stations are separate from Sam's Club Gas Stations. Your Sam's Club card works only at Sam's Club Gas Stations. You will need a different payment method at Walmart Gas Stations.
Can I use my Sam's Club card at other stores that sell similar products?
Yes, as long as those stores accept Mastercard or American Express. Your Sam's Club card functions as a standard Mastercard or American Express everywhere except Walmart and its subsidiaries. You can use it at Target, Costco, supermarkets, restaurants, and online retailers.
What if I have both a Sam's Club card and a Walmart card?
Each card works only at its respective retailer. Use your Sam's Club card at Sam's Club and your Walmart card at Walmart. If you shop at both, carrying both cards ensures you can pay at either location and earn rewards at each one.
Is there a card that works at both Sam's Club and Walmart?
No single co-branded card works at both. You would need a general-purpose Visa, Mastercard, American Express, or Discover card from your bank or another issuer. These cards work at both retailers but do not offer the category-specific rewards that Sam's Club or Walmart branded cards provide.