Let me put it this way: The credit/debit button does not affect the type of account that funds are drawn from or how they are charged to a customer’s account. It affects the choice of network used to transmit the transaction to the customer’s bank. If you are using a debit card and you press the “credit” button, the transaction will be transmitted via the Visa or MasterCard credit network to the customer’s bank. If you press the “debit” button it will be transmitted via a competing ATM card (“debit”) network.
Why should the customer give a flying fork what network is used or why is the customer even asked to make this choice? Well, it’s kind of like the American health care payment system: It makes absolutely no sense to outsiders and Americans don’t really understand it, but are used to it.
Visa and MasterCard would dearly love to force the merchants to just use their network and pay whatever they demand as a condition for accepting their cards. Merchants would like to choose the network that costs them the least. So we have the stalemate condition where the consumer, who is totally ignorant of the issues, is asked to make the choice.
Visa has a credit card network, they also have a debit card network called Cirrus. MasterCard has a credit card network, they also have a debit card network called Maestro. If a debit card has the Visa logo on it, transactions can be routed via the Visa credit card network. If the issuing bank has signed up for Cirrus, it can be routed via the Cirrus network also. The issuing bank can also sign up with other competing debit card networks, such as Pulse, NYCE, and Star. So if a consumer uses a Visa debit card and presses the “credit” button, the transaction is routed via the Visa credit network. If the consumer presses the “debit” button, it can be routed via any other network that the card issuer and the merchant’s processor mutually accept.
Until 2011, debit payments processed via the debit card networks cost the merchants significantly less than debit payments processed via credit card networks. So merchants tried to push consumers to choose debit. On the other hand, card issuing banks tried to push consumers to choose credit because they collected larger fees from the merchants. Some banks charged consumers a fee if they used “debit.” Some banks paid customers higher interest rates if they made a certain number of “credit” debit card purchases each month. Visa and MasterCard made rules that prohibited merchants from trying to discourage “credit” purchases. Merchants filed anti-trust lawsuits in response.
Then the big game-changer came in the 2010 Dodd–Frank Wall Street Reform and Consumer Protection Act. In particular, in the section referred to as The Durbin Amendment.
The Durbin Amendment divided debit cards into two classes: exempt and non-exempt. All debit cards issued by financial institutions with $10 billion or less in assets are exempt. All debit cards issued by financial institutions with more than $10 billion in assets are non-exempt. The Durbin Amendment ordered the Federal Reserve Board to set a maximum interchange rate for non-exempt debit cards.
Before we go any further the word “interchange” is frequently misused. It is the fee that the merchant’s processor’s bank (called the “acquirer”) pays to the network for processing a charge. It is NOT the fee that the merchant pays. The acquirer and the processor want to make money, so they charge the merchant more than the interchange rate. But since neither the acquirer nor the processor want to lose money, the interchange rate serves as a sort of a floor for the merchant’s fees.
The Federal Reserve set the maximum interchange rate to 22 cents per transaction plus 0.05% of the amount of the transaction for non-exempt debit cards. There is no cap for exempt debit cards. This cap applies whether you choose “credit” or “debit” at the terminal.
This caused a radical shift in pricing for debit card transactions. All of the networks adopted a two-tier pricing system: Non-exempt cards were priced at the maximum allowed by law. Exempt card fees were raised to roughly the same as Visa and MasterCard charge for credit cards. And the “small ticket” fee categories (the reduced fees charged on small transactions) were eliminated. (The change to small ticket fees was not mandated by law, but was just a little “fork you” to the merchants that lobbied for the law.)
It used to be that “debit” debit card transactions cost the merchants less, but now you basically have to check transaction by transaction to determine which costs less. Many small merchants, however, sign up with processors that have “blended rates.” That means the merchant pays fees unrelated to the actual interchange rate.
Oh, and one more thing that the Durbin Amendment did: It required that the issuing banks all allow debit card POS transactions to be processed through two or more unrelated networks.
So, there, wasn’t that simple?
And, yes, I have completely ignored American Express and Discover.