CHICAGO ( TheStreet) -- If the holiday season is make-it-or-break-it time for many retailers, it's also a major windfall for Visa ( V) and MasterCard ( MA). Every time a shopper pulls out his or her credit card, a percentage of that transaction goes straight to the large credit cards companies and the banks that issue their cards. Think of it as a gift that keeps on giving to large financial institutions.Those steadily rising fees have left many small businesses feeling like the Grinch. According to the National Retail Federation, credit- and debit-card fees have tripled over the past 10 years, to about $50 billion a year. That money comes straight out of retailers' profits, and small businesses eventually banded together to protest in increase in these so-called "swipe fees." On average, the credit-card companies and banks charge a 2% fee on any payment made by credit card, a fee customers don't see but that makes a sizable dent in retailers' razor-thin profits. Although Visa and MasterCard could theoretically compete for business by lowering their fees, that hasn't happened. The growing popularity of "premium" credit cards has only made things worse. A card that earns airline miles or other rewards often comes with 3% to 4% fee. The money to pay for those "rewards" is coming right out of merchants' registers, something many credit-card users are unaware of. So the retail industry fought back, lobbying Congress to make changes as part of 2010's Wall Street reform bill. Debit cards, because they act as a cash withdrawal mechanism, are regulated by the Federal Reserve, and a measure was passed that capped debit card fees at a maximum of 24 cents per transaction. But credit cards were a more uphill battle, requiring a trip to court. A large consortium of merchants, including retail giants such as Target ( TGT) and Macy's ( M), the National Association of Convenience Stores, the Independent Booksellers' Association and the National Restaurant Association, joined together for a class-action lawsuit against Visa, MasterCard and the largest credit-card-issuing banks. Last month, a $7.3 billion dollar settlement was offered to retailers, along with other concessions, such as allowing merchants to charge their own fees to recoup the amount stores paid in swipe fees. The proposed settlement put no limits on swipe fee rates, though, as had been done with debit card rates -- one of the retail industry's major concerns.