2024 401k Contribution Limits 2024 Catch Up. This amount is an increase of $500 from the 2023 401 (k.  — in 2024, the irs allows you to contribute up to $23,000 to your 401 (k) plan, up from $22,500 in 2023.

 — workers who contribute to a 401 (k), 403 (b), most 457 plans and the federal government’s thrift savings plan can contribute up to $23,000 in 2024, a $500 increase.  — for 2024, the maximum you can contribute to a simple 401 (k) is $16,000.