Eighteen U.S. states are mulling legislation to proscribe retailers from tacking extra costs on to credit card transactions, following approval of new rules allowing merchant surcharges on MasterCard and Visa purchases. Ten states had already adopted prohibitions on credit card surcharges before the rule change, and few retailers have added surcharges out of fear of outraging customers and negatively impacting their businesses. Nevertheless, retailers are against the ban legislation because its passage would limit their options for recouping income lost to swipe fees paid to card networks. Of the 18 states, Utah has made the most progress, as its bill is currently being reviewed by Gov. Gary Herbert's office. Mississippi, meanwhile, recently put a limited ban on credit card surcharges into effect, with the law applicable only to transactions made with cards issued by the state government. There also are indications of moves in a few states to loosen or not impose bans on such surcharges, including the introduction of a bill to relax an existing proscription in Maine.