Irs 2024 Max 401k Contribution Limits. $19,500 in 2020 and 2021 and $19,000 in 2019), plus $7,500 in 2023;.  — 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.

 — 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. More people will be able to make contributions to roth.