What does American express charge retailers?

American Express typically charges retailers a merchant fee that ranges from about 2.5% to 3.5% per transaction. This fee is generally higher than those charged by other credit card networks like Visa or MasterCard. The exact rate can vary based on factors such as the type of business, transaction volume, and the specific agreement between American Express and the retailer. Additionally, retailers may also incur other fees related to account management or service provisions.