There are interchange fees that Visa and MasterCard charge every on every transaction range from 0.05% + $0.21 to 2.40% + $0.10. The processor that you're deali

There are interchange fees that Visa and MasterCard charge every on every transaction range from 0.05% + $0.21 to 2.40% + $0.10. The processor that you're dealing with has to mark this up, and is taking a little bit of a risk that you won't charge lots of cards all at once and run away with all the money. Basically, it's hard to make money on lower amounts if all transaction types are lumped together into one category. Some people such as Groupon Payments and Square can charge less on card present transactions, because the interchange fees are lower on those.