2025 401k Contribution Limit Catch Up Over 55. In 2025, employees may contribute up to $23,500 to a workplace 401(k), 403(b) and certain 457 plan, a $500 increase from the previous year. Plan participants ages 50 and older.

Section 401(k) and 403(b) plan elective deferral limit. That means anyone who meets the age requirements can contribute a total of $31,000 to their.