Mastercard (NYSE: MA) customers in the U.K. are in store for some sticker shock this coming autumn. The company intends to dramatically increase its main debit and credit card fees in the wake of Brexit, the country's political and economic separation from the European Union. As reported by the Financial Times on Sunday, starting on Oct. 15, the interchange fee for Mastercard's credit cards is set to rise to 1.5% of the total transaction value for each purchase made by British consumers of a good or service originating from the EU. That's a five-fold jump from the current 0.3%. For debit cards, it plans to boost the rate from its present 0.2% to 1.15%. Image source: Getty Images. The newspaper cited the example of Amazon (NASDAQ: AMZN), which typically sells its wares for the U.K. market via its operations the EU nation of Luxembourg. Assuming that Amazon does not dramatically expand its U.K. logistics footprint in the next few months, a customer in the country using a Mastercard would be subject to the new interchange rates. Also called the "swipe fee," interchange is levied by payment card networks and issuers to cover the expenses related to credit risk and other factors involved in card management. These fees are typically modest in percentage terms, but can add up considerably with large purchase volumes or on sizable, one-time buys. In 2015, in a move to protect consumers and businesses from hidden fees, the EU mandated a cap on interchange fees. But the U.K. has no similar cap in place, and after Brexit, this restriction will no longer apply to transactions that are inter-regional. 10 stocks we like better than MastercardWhen investing geniuses David and Tom Gardner have a stock tip, it can pay to listen. After all, the newsletter they have run for over a decade, Motley Fool Stock Advisor, has tripled the market.* David and Tom just revealed what they believe are the ten best stocks for investors to buy right now... and Mastercard wasn't one of them! That's right -- they think these 10 stocks are even better buys. See the 10 stocks *Stock Advisor returns as of November 20, 2020 John Mackey, CEO of Whole Foods Market, an Amazon subsidiary, is a member of The Motley Fool's board of directors. Eric Volkman has no position in any of the stocks mentioned. The Motley Fool owns shares of and recommends Amazon and Mastercard and recommends the following options: long January 2022 $1920 calls on Amazon and short January 2022 $1940 calls on Amazon. The Motley Fool has a disclosure policy.Source