2025 Max Roth 401k Contribution Limits. The maximum amount you can contribute to a roth 401 (k) for 2025 is $23,000 if you're younger than age 50. You may need to work at a company.

This table shows whether your contribution to a roth ira is affected by the amount of your modified agi as computed for roth ira purpose. This amount is up modestly from 2025, when the individual 401 (k).