Actually Dave, I don’t think you have it quite right. MasterCard and Visa are not processors. My company is a merchant and this is an excerpt from our payment processor’s website:
Credit Card Processing Market Participants
Below is a brief list of the parties involved in processing a credit card transaction, the role each participant plays and the most common industry nomenclature for each party.
Visa® and MasterCard® Associations
Put simply, VISA and MasterCard are associations of banks whose primary purpose is to set rules and regulations for the acceptance of credit cards and protect the integrity of their brands and the credit card processing industry. VISA and MasterCard are also responsible for setting Interchange Rates.
Although Visa and MasterCard are responsible for setting the Interchange Rates, they do not receive a significant portion of these fees. Instead, for every transaction conducted with a Visa or MasterCard, they receive “Dues & Assessments”. Currently, Visa receives 0.0925% of the sale, and MasterCard receives 0.095% of the sale. It is also important to understand that companies such as American Express® and Discover® are not Card Associations. To accept these types of cards Merchants must have separate agreements with these companies.
Card Issuing Member Banks
Card Issuing Member Banks are members of MasterCard and Visa that issue credit and debit cards to their customers. Every time a Visa or MasterCard branded credit card is used, the member bank that issued that credit card earns the Interchange Fee associated with the transaction. This fee is designed to compensate Card Issuing Member banks for the risk associated with the transaction.
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The site goes on the describe all of the other parties to a credit card transaction – the merchant bank, the front-end processor, the back-end processor, the gateway provider…
Everyone collects a fee, but the interchange fee (about 2% – I’d have to be at work to look at my statements to see the current Visa and MC interchange rates) goes to the card issuing bank.