What grocery stores are eligible for cash back with the American Express Blue Cash Preferred card?

The American Express Blue Cash Preferred card offers a generous cashback program, especially known for its high rewards rate at U.S. supermarkets. Cardholders earn 6% cash back at U.S. supermarkets on up to $6,000 per year in purchases (then 1%), which makes it one of the most rewarding options for grocery shopping among credit cards. This benefit typically applies to standalone supermarkets and grocery stores, which exclude superstores and warehouse clubs like Walmart and Costco. For precise eligibility, it's recommended to check the American Express website or the terms and conditions of the Blue Cash Preferred card since the company provides a list of merchants categorized as U.S. supermarkets that qualify for cash back.