Using Your Sam's Club Credit Card at Walmart and Other Stores

Sam's Club Credit Card Works Only at Sam's Club and Sam's Gas Stations

No, you cannot use a Sam's Club Mastercard at Walmart. The Sam's Club credit card is a closed-loop card, which means it works only at Sam's Club locations and Sam's Club gas stations. If you try to use it at Walmart, Target, Amazon, or any other retailer, the transaction will be declined.

This is different from a regular Mastercard or Visa, which you can use almost anywhere that accepts credit cards. The Sam's Club card is designed specifically to reward members who shop at Sam's Club, so the card issuer (Synchrony Bank) restricts where you can spend it.

If you need a credit card that works at Walmart and other stores, you would need a different card — either a general-purpose card like a Visa or Mastercard, or Walmart's own credit card, which works at Walmart and Sam's Club locations.

Key Takeaways

• The Sam's Club Mastercard only works at Sam's Club warehouse locations and Sam's Club gas stations, not at Walmart or other retailers.
• Sam's Club also offers a Walmart credit card (through Walmart) that works at both Walmart and Sam's Club, which is a different product entirely.
• If you want a card that works everywhere, you need a standard Visa or Mastercard, not a Sam's Club closed-loop card.
• Closed-loop cards are designed to lock you into one retailer's ecosystem and typically offer rewards only at that retailer.

How Closed-Loop Cards Differ From Regular Credit Cards

A closed-loop card is a credit card that works only at one retailer or a small group of affiliated retailers. The Sam's Club Mastercard is closed-loop because Synchrony Bank (the card issuer) has an agreement with Sam's Club to limit where the card can be used. This protects Sam's Club's relationship with its members and keeps spending within the Sam's Club ecosystem.

A open-loop card — like a standard Visa or Mastercard — works at any merchant that accepts that card brand. You can use it at gas stations, restaurants, online stores, and thousands of other places. Open-loop cards are issued by banks and are not tied to a single retailer.

The trade-off is usually rewards. Sam's Club cardholders earn higher cash back or bonus points at Sam's Club than they would with a regular card. But that benefit only applies to Sam's Club purchases. If you shop at multiple retailers, an open-loop card might give you better overall value.

What Happens If You Try to Use It Elsewhere

If you swipe or insert your Sam's Club Mastercard at Walmart, Target, or any non-Sam's Club merchant, the payment terminal will reject the transaction. You will see a decline message on the screen, and the cashier will ask you for a different payment method.

This is not a fraud block or a temporary hold — it is a permanent restriction built into how the card works. The card's approval system checks the merchant code (the category and location of the business) before approving any transaction. If the merchant is not Sam's Club or a Sam's Club gas station, the transaction fails immediately.

You will not be charged a fee for the declined transaction, but you will need to pay with another card or payment method to complete your purchase.

Sam's Club Locations Where Your Card Works

Your Sam's Club Mastercard works at all Sam's Club warehouse locations in the United States. This includes the main shopping floor where you buy groceries, household items, electronics, and other merchandise. The card also works at Sam's Club fuel stations, which are located at or near most warehouse locations.

Some Sam's Club locations have additional services — like a pharmacy, optical center, or tire shop — and your card works for purchases at these departments too, as long as they are inside the Sam's Club building.

The card does not work at Sam's Club online (samsclub.com). For online purchases, you need to use a different payment method, such as a regular Visa, Mastercard, or debit card. This is a common restriction for closed-loop cards because the online system is separate from the in-store payment system.

Walmart's Credit Card Option and How It Differs

Walmart offers its own credit card through Synchrony Bank, and this card works at both Walmart and Sam's Club locations. If you shop at both retailers regularly, the Walmart card might be more useful than the Sam's Club card because it gives you access to both stores with one card.

The Walmart card is still a closed-loop card — it does not work at Target, Costco, or other retailers — but its reach is wider than the Sam's Club card. The rewards structure is different too. The Walmart card typically offers cash back on Walmart purchases and sometimes on gas, but the exact rewards vary depending on which version of the card you hold.

If you are a member of both Sam's Club and Walmart, you could carry both cards and use each one at its respective retailer. Or you could use the Walmart card at both locations if you prefer to carry fewer cards.

When to Use Your Sam's Club Card Versus a Regular Credit Card

Use your Sam's Club Mastercard when you are shopping at Sam's Club and want to earn the card's rewards (usually cash back or points). If the rewards rate is higher than what you would earn with a regular card, it makes sense to use it.

Use a regular Visa or Mastercard when you are shopping anywhere other than Sam's Club — at Walmart, grocery stores, restaurants, online retailers, or gas stations outside of Sam's Club. Your Sam's Club card simply will not work at these places.

If you do not have a regular credit card and only carry your Sam's Club card, you will need to bring a backup payment method (debit card, cash, or another credit card) whenever you shop outside of Sam's Club. This is why most people who use closed-loop cards also carry at least one open-loop card for everyday use.

Frequently Asked Questions

Can I use my Sam's Club card online at samsclub.com?

No. The Sam's Club Mastercard does not work for online purchases at samsclub.com. You will need to use a different payment method, such as a regular Visa, Mastercard, debit card, or PayPal. This is a common limitation for closed-loop cards because the online payment system is separate from the in-store system.

What if I have both a Sam's Club card and a Walmart card?

You can carry both cards and use each one at its respective retailer. The Walmart card works at both Walmart and Sam's Club, so if you prefer to use one card everywhere, the Walmart card gives you that option. But if you want to maximize rewards at each store, using the Sam's Club card at Sam's Club and the Walmart card at Walmart might earn you more cash back.

Will my Sam's Club card work at Walmart gas stations?

No. Your Sam's Club card only works at Sam's Club gas stations. Walmart gas stations are separate from Sam's Club and do not accept the Sam's Club Mastercard. You would need a different card to pay for gas at Walmart.

Can I use my Sam's Club card at Costco?

No. The Sam's Club card is restricted to Sam's Club locations only. Costco has its own credit card (the Costco Anywhere Visa) and does not accept the Sam's Club Mastercard. If you shop at both warehouses, you would need separate cards for each one.

What should I do if my Sam's Club card is declined at a non-Sam's Club store?

The decline is expected because the card is designed to work only at Sam's Club. Simply use a different payment method — a regular credit card, debit card, or cash. There is no error or fraud involved; the card is working as intended by blocking transactions outside of Sam's Club.