No, the Sam's Club Mastercard does not work at Walmart
The Sam's Club Mastercard is a closed-loop card, meaning it only works at Sam's Club and Sam's Club Gas stations. You cannot use it to pay for groceries, gas, or anything else at Walmart, even though both are owned by Walmart Inc. The card will be declined if you try to swipe it at a Walmart checkout.
This restriction exists because Sam's Club and Walmart operate as separate retail brands with separate payment systems. Sam's Club membership cards and Sam's Club credit cards are tied to the Sam's Club network alone. Walmart has its own credit card products — the Walmart Credit Card and the Walmart Mastercard — which work at Walmart stores but not at Sam's Club.
If you shop at both retailers regularly, you will need separate payment methods for each. Many people carry both a Sam's Club card and a Walmart card, or use a general-purpose credit card that works everywhere.
Key Takeaways
- The Sam's Club Mastercard works only at Sam's Club locations and Sam's Club Gas stations, not at Walmart stores.
- Walmart and Sam's Club are separate retail brands with separate payment networks, even though the same parent company owns both.
- If you want a credit card that works at Walmart, you can open a Walmart Credit Card or Walmart Mastercard instead.
- A general-purpose Mastercard or Visa from your bank will work at both Sam's Club and Walmart without restriction.
Where the Sam's Club Mastercard does work
The Sam's Club Mastercard works at any Sam's Club warehouse location in the United States. This includes the main warehouse where you shop for bulk groceries, household items, and electronics. It also works at Sam's Club Gas stations, which are usually located at or near the warehouse entrance.
You can use the card for in-warehouse purchases, online orders at samsclub.com, and fuel purchases. The card earns rewards points on all these purchases — typically 2% cash back on fuel and food purchases, and 1% on everything else, though the exact rewards structure depends on which version of the Sam's Club Mastercard you hold.
Outside of Sam's Club, the card functions as a regular Mastercard only if you have a Sam's Club Plus or Sam's Club Elite membership. Members with these higher tiers can use their card anywhere Mastercard is accepted. Basic Sam's Club members cannot use the card outside Sam's Club at all.
What to use instead at Walmart
If you shop at Walmart and want a branded credit card, you have two options. The Walmart Credit Card works only at Walmart and Walmart.com. The Walmart Mastercard works at Walmart, Walmart.com, and anywhere else Mastercard is accepted.
Both cards offer rewards on Walmart purchases — typically 2% cash back on fuel and groceries at Walmart, and 1% on other purchases. The Walmart Mastercard gives you the flexibility to use the same card at other retailers, gas stations, and restaurants outside of Walmart.
If you do not want to open a Walmart-branded card, any Mastercard or Visa from your bank will work at both Sam's Club and Walmart without restriction. This approach keeps your wallet simpler if you do not want multiple store cards.
Why Sam's Club and Walmart have separate card systems
Sam's Club and Walmart operate as distinct business units with separate management, inventory systems, and customer bases. Sam's Club is a membership-only warehouse club, while Walmart is a traditional retail store open to anyone. The membership model means Sam's Club needs to verify that cardholders are active members before processing transactions.
The separate card systems also allow each retailer to track spending patterns and offer targeted rewards. Sam's Club can reward bulk purchases and fuel, while Walmart can focus on grocery and everyday shopping rewards. This separation lets each brand design a card that fits its specific customer base.
From a technical standpoint, the payment networks are straightforward different. Sam's Club processes transactions through its own system, while Walmart processes through its own. Even though both companies are owned by Walmart Inc., they maintain separate financial infrastructure.
Using a general-purpose card at both retailers
The simplest approach if you shop at both places is to use a standard credit card from your bank — a Visa or Mastercard with no store affiliation. These cards work everywhere, including Sam's Club, Walmart, and any other retailer. You will not earn store-specific rewards, but you will have one card that covers all your shopping.
Some people prefer this method because it reduces the number of cards to track and simplifies their wallet. You also avoid the temptation to overspend at one retailer because you have a card that feels "special" there. A general-purpose card also works if you travel or shop at retailers beyond Sam's Club and Walmart.
If you want rewards, look for a cash-back card that offers flat rewards across all purchases, or one that gives higher rewards on groceries and gas — categories where both Sam's Club and Walmart have strong offerings.
What happens if you try to use the Sam's Club card at Walmart
If you swipe or insert your Sam's Club Mastercard at a Walmart checkout, the transaction will be declined. The payment terminal will not recognize the card as valid for that merchant. You will need to provide a different payment method — another credit card, debit card, or cash.
This happens when ready at the register, so there is no delay or confusion about whether the card works. The cashier will straightforward tell you the card was declined and ask for another form of payment. It is not a fraud block or a temporary issue; it is how the card is designed to function.
If you have a Sam's Club Plus or Elite membership and a Sam's Club Mastercard, you can use the card outside Sam's Club as a regular Mastercard. However, this only applies to those membership tiers. Basic membership cardholders cannot use the card anywhere except Sam's Club.
Frequently Asked Questions
Can I use my Sam's Club membership card as a payment method at Walmart?
No. Your Sam's Club membership card is not a payment card — it is a membership verification card. It does not contain payment information and cannot be swiped to make purchases. You need a separate payment method, such as a credit card, debit card, or cash, to pay at any retailer.
If I have a Sam's Club Plus membership, can I use my card at Walmart?
Your Sam's Club Mastercard will work as a regular Mastercard at any merchant that accepts Mastercard, including Walmart, if you have a Plus or Elite membership. However, you still cannot use it at Walmart to earn Sam's Club rewards — the rewards only explore to purchases at Sam's Club locations.
Do I need separate memberships for Sam's Club and Walmart?
Yes. Sam's Club is a membership-only warehouse club, so you must have an active membership to shop there. Walmart does not require a membership — anyone can walk in and shop. If you want to shop at both, you need a Sam's Club membership but not a Walmart membership.
What is the best card to use if I shop at both Sam's Club and Walmart?
A general-purpose Mastercard or Visa from your bank works at both without restriction. If you want rewards, look for a card that offers cash back on groceries and fuel, since both retailers have strong offerings in those categories. Alternatively, you can carry both a Sam's Club card and a Walmart card if you want store-specific rewards.
Can I use my Walmart card at Sam's Club?
No. The Walmart Credit Card works only at Walmart and Walmart.com. The Walmart Mastercard works at Walmart and anywhere Mastercard is accepted, but Sam's Club does not accept it because Sam's Club only accepts its own branded card or other general-purpose cards.