Phil Hinke a veteran of the merchant service industry, has a great article at Practical E-Commerce.He goes on to discuss many of the various pricing methods used in the credit card processing business including tier and interchange pricing. Phil explains some deceptive interchange pricing practices:
"One of statement types I continually come across — which confuses merchants — is the one that does not show all the charges for the month on the statement, and in fact may delay showing all the charges for up to two months. I have spoken to salespeople who love this statement because when they sign up a new merchant, that merchant generally does a cost comparison after the first month to see how much money he or she is saving after switching processors. Unfortunately, the merchant does not realize that some of that month’s processing cost will not show up on the statement for up to two months. Therefore, a merchant’s total processing fees for April sales may not show up until the June statement."