Please help improve this article by adding citations to reliable sources. The qualified rate is also the rate commonly quoted to a merchant when they inquire about pricing. Well, if you're one of those new businesses, you may have a few questions about what's involved in accepting credit cards. Interchange fees vary depending on card type and the circumstances of the transaction. The non-qualified rate is usually the highest percentage rate a merchant will be charged whenever they accept a credit card. This article includes a list of references , related reading or external links , but its sources remain unclear because it lacks inline citations. Various methods exist for presenting a credit card sale to "the system.