Overdraft fees accounted

Overdraft fees accounted for more than 75 percent of service fees charged on customer deposits, the paper cited Moebs as saying.

Last year the U.S. Federal Reserve approved credit card rules to curb "unfair" practices such as surprise fees and interest rate hikes, and new mortgage lending rules are expected this summer.

It is also mulling rules to give bank customers the chance to opt out of overdraft schemes that can involve fees.