The relationship between consumers and credit cards gets a lot of attention. But merchants also have relationships with credit cards, and the dynamics of this relationship have significant effects on consumers’ use of credit cards as well as on the competitive landscape in the credit card industry. A lot of my academic work has related to this (I apologize for the self-promoting links), and this post is meant to provide a short summary of some of the issues that arise in this relationship. There are a lot of twists that I cannot convey in this blog posting, but I am happy to carry on a conversation in the comments and refer readers to my articles on the topic for more detail (the most recent papers are at the bottom of the linked webpage).
Merchants pay banks a fee on every credit card transaction. The fee is referred to varying as the “merchant discount fee” or the “interchange fee.” Because of these fees, credit card transactions are much more expensive for merchants than transactions on most other consumer payment systems: cash, checks, ACH, PIN debit (but not signature debit). There is also significant cost variation among credit cards. Some cards, such as rewards and corporate cards can cost merchants twice as much as others. These fees (tens of billions of dollars) are vital to credit card networks’ profitability and have led merchants to attempt all sorts of strategies to minimize their payment costs.
The largest component of the fee merchants pay goes to finance credit card rewards programs, which in turn generate more credit card transactions. Although merchants finance the rewards programs, they derive little or no benefit from them. Rather than generating additional sales, rewards programs merely induce consumers to shift transactions from less expensive payment systems to more expensive rewards credit cards. So why, then, do all consumers pay the same price for purchases, regardless of the means of payment?
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