Banks inside Wal-Mart stores rake in high fees by Ben Geier @FortuneMagazine May 12, 2014, 8:49 PM EST E-mail Tweet Facebook Google Plus Linkedin Share icons FORTUNE — Wal-Mart WMT is known for its low-cost products, but the independent banks that operate inside its stores aren’t following suit. A report in the Wall Street Journal Monday says the five banks with the most Wal-Mart branches are among the top 10 U.S. banks in terms of charging fees, such as overdraft charges. Most of the fees charged by the five banks operating in Wal-Mart stores come from overdraft charges, the paper said, while most U.S. banks earn the majority of their income through lending. MORE: Did NASDAQ just hire its next CEO? Wal-Mart does not play a role in the operations of these banks, but a spokeswoman did tell the Journal that the megastore chain has a “very thorough process” for choosing which banks to lease space to. Some of the top banks at Wal-Mart market their accounts to people who otherwise might not have access to banks, including those with bad credit histories, the Journal said.