Visa and Mastercard have reached an estimated $30 billion settlement to limit credit and debit card fees for merchants, with some savings likely to be passed on to consumers through lower prices.

The antitrust settlement announced Tuesday is one of the largest in U.S. history, and if it receives court approval would resolve most claims in nationwide litigation that began in 2005.

Some critics believe it may not go far enough, saying the savings would be temporary and that fees would remain high.