I don't have a source to cite, but I think in general, Debit cards swiped as credit cost the merchant the same or maybe more. There are some recent court decis

I don't have a source to cite, but I think in general, Debit cards swiped as credit cost the merchant the same or maybe more. There are some recent court decisions that may have capped these. High fees for this stuff is the reason by so many banks changed their retail business model to things like Totally free checking(when you make 12 debit card purchases each month).