Final answer:
The maximum processing fee a broker may take out of a payment by credit card varies depending on the credit card company and the agreement between the broker and the payment processor.
Step-by-step explanation:
The maximum processing fee a broker may take out of a payment by credit card varies depending on the credit card company and the agreement between the broker and the payment processor. However, there are generally industry-standard fees that brokers typically adhere to. For example, Visa and Mastercard charge an interchange fee of around 2-3% for each transaction, which is typically passed on to the merchant. In addition to the interchange fee, brokers may charge a markup fee to cover their costs and earn a profit. This markup fee can range from 0.5% to 5%, but can vary significantly depending on the broker and the nature of the business.