The Sam's Club credit card is issued by Synchrony Bank. Synchrony Bank is one of the largest private-brand credit card issuers in the United States. They offer a variety of credit cards, including the Sam's Club Mastercard rewards. The Sam's Club Mastercard is a great way to save money on your Sam's Club purchases. You'll earn cash back on every purchase and no annual fee. In addition, you can use your card anywhere Mastercard is accepted