401k Contribution Limits 2024 Catch Update. The 2025 maximum 401k contribution limit will be $23,500, which is a an increase of $500 over the 2024 maximum 401k contribution limit of $23,000 (which had increased $500. That means an active participant 50 or older can contribute up.

Changes in inflation affect the limits, which have risen gradually. The 2025 maximum 401k contribution limit will be $23,500, which is a an increase of $500 over the 2024 maximum 401k contribution limit of $23,000 (which had increased $500.