Retailers are (in general) barred from charging different prices for cash vs card payments. As I understand it, here's how it works in the US: - Amex says: "Y

Retailers are (in general) barred from charging different prices for cash vs card payments. As I understand it, here's how it works in the US: - Amex says: "You can charge a card fee if you do for all the cards you accept." - Visa and Mastercard say: "No card fees, but you can offer a discount for cash transactions."