Roth 401k Contribution Limits 2025. The 401k contribution limits for the year 2025 are expected to see many increases in different plans including elective deferral limit to $24,000, defined contribution. In 2023, the most you can contribute to a roth 401 (k) and contribute in pretax.

Employees age 50 and older can contribute an additional $7,500 for a total. The new contribution limit for 401(k)s and other workplace retirement plans in 2025 will be $23,500, up from $23,000 currently, the internal revenue service said friday.