401k Max 2024 After Tax. Employee contributions are limited to $23,000 (for 2024) plus an additional $7,500. Again, expect to pay a 401 (k) custodian or administrator fee.

Those 50 and older can contribute an additional $7,500. 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.