The Consumer Financial Protection Bureau on Thursday announced the final version of a rule limiting banks’ ability to charge overdraft fees. It says the rule will save American consumers $5 billion annually.

The regulator said that banks could opt to charge $5 for overdrafts — a steep drop from the average fee of around $35 per transaction — or limit the fee to an amount that covers the lenders’ costs, or charge any fee while disclosing the interest rate of the loan.

“For far too long, the largest banks have exploited a legal loophole that has drained billions of Dollars from Americans’ deposit accounts,” CFPB Director Rohit Chopra said in a statement. “The CFPB is cracking down on these excessive junk fees and requiring big banks to come clean about the interest rate they’re charging on overdraft loans.”

The effort, part of a flurry of activity from the CFPB in the waning days of the Biden administration, faces stiff opposition from U.S. banking groups that have successfully stymied other efforts from the regulator. For instance, a rule capping credit card late fees at $8 per incident that was set to take effect in May has been held up in federal court.

The CFPB said that its overdraft rule will take effect Oct. 1, 2025, though its ultimate fate is unclear.

Even before the election victory of Donald Trump last month, the fate of the overdraft rule would’ve been murky, thanks to the industry pushback. But Trump is expected to install a new CFPB head next month that is unlikely to support Biden-era efforts to rein in banking activity.

Bank lobbying groups have argued that the overdraft rule, first proposed in January as part of Biden’s war on junk fees, would reduce access to overdraft services and could send customers to worse alternatives like payday loans.

The Consumer Bankers Association said Thursday it was “exploring all options” to push back against the effort.

This story is developing. Please check back for updates.