Interchange Analysis by the GAO
In 1991, Visa and MasterCard each had 4 standard domestic credit card interchange fee rate categories. By 2009, Visa had 60 and MasterCard had 243 different rate categories that could be charged to card transactions, although not all of these rates apply to all merchants.
The increase in the number of rates occurred as different types of merchants and cards were added to their Interchange rate schedules. For example, the networks introduced new rates for certain industries that previously had not accepted cards (such as energy utility companies or government agencies) or for new methods of shopping (such as … more