401k Maximum Contribution 2024 Plus Catch Up Plan.  — the 2024 contribution limit for 401(k) plans is $23,000, up from $22,500 in 2023. The limit for overall contributions—including the employer match—is 100%.

 — as with the traditional 401(k), the contribution limit for the safe harbor plan is up to $23,000 for 2024. The additional contribution limit is likewise $7,500.