401k 2024 Maximum Contribution. The contribution limit for 401(k)s, 403(b)s, most 457 plans and the federal government's thrift savings plan is $23,000 for 2024, up from $22,500 in 2023. Those 50 and older can contribute an additional $7,500.

If you’re age 50 or. For 2024, the contribution limit increases again to $23,000.