>It's my understanding that it's explicitly against the merchant agreement with the big CC players to have different prices for different payment methods.
It was. Then there was a class action lawsuit against Visa and Mastercard brought on by Walmart, Target, Amazon, etc.
A part of the settlement that allows merchants to charge fees to customers paying via credit card in order to recoup swipe fees took effect on 27 January 2013. Debit cards and transactions in the ten states that prohibit credit-card surcharges will not be affected. Many large retailers, such as Wal-Mart and Target have opted not to impose surcharges.[6] In the event of a return, surcharges are refunded along with the purchase price of the merchandise.[7] The National Association of Convenience Stores, also known as the NACS, complained that this measure "merely make[s] retailers the collection agents for the banks."[8] The National Retail Federation said, "that card company fees are the problem and the surcharge story is a volume that belongs on the fiction aisles. The real threat to retailers and their customers continues to be price-fixed hidden fees that can only be cured by transparency and competition." [9]
However, the way that gas stations got around the rules at first was they were allowed to offer a "cash discount." So CC price was the "real" price and if you paid with cash you got a discount. Same thing in the end though.
It was. Then there was a class action lawsuit against Visa and Mastercard brought on by Walmart, Target, Amazon, etc.
http://en.wikipedia.org/wiki/Payment_Card_Interchange_Fee_an...
A part of the settlement that allows merchants to charge fees to customers paying via credit card in order to recoup swipe fees took effect on 27 January 2013. Debit cards and transactions in the ten states that prohibit credit-card surcharges will not be affected. Many large retailers, such as Wal-Mart and Target have opted not to impose surcharges.[6] In the event of a return, surcharges are refunded along with the purchase price of the merchandise.[7] The National Association of Convenience Stores, also known as the NACS, complained that this measure "merely make[s] retailers the collection agents for the banks."[8] The National Retail Federation said, "that card company fees are the problem and the surcharge story is a volume that belongs on the fiction aisles. The real threat to retailers and their customers continues to be price-fixed hidden fees that can only be cured by transparency and competition." [9]
However, the way that gas stations got around the rules at first was they were allowed to offer a "cash discount." So CC price was the "real" price and if you paid with cash you got a discount. Same thing in the end though.