401k 2024 Limits Catch Up 2024. Mercer’s forecast aligns with milliman’s most recent 2024 irs limits forecast, which also predicts that the 2024 maximum contribution for 401(k), 403(b), and 457. Contribution limits for a roth 401(k) are the same as for a traditional 401(k).

Starting in 2024, employees can contribute up to $23,000 into their 401(k), 403(b), most 457 plans or the thrift savings plan for. The 401 (k) contribution limits for 2024 are $23,000 for individuals under 50, and $30,500 for those 50 and older.