2024 401k Limits Catch Up. For 2024, the maximum you can contribute to a simple 401 (k) is $16,000. For those with a 401(k), 403(b), or 457 plan through an employer, your new maximum contribution limit will go up to $23,000 in 2024.

Employees can contribute up to $23,000 to their 401(k) plan for 2024 vs. If your plan qualifies, you may be able to contribute an additional 10%.