2024 Max Roth 401k Contribution Limits. Employees can invest more money into 401(k) plans in 2024, with contribution limits increasing from $22,500 in 2023 to $23,000 in 2024. Contribution limits are the same for the employee portion, whether you use a roth solo 401(k) or a traditional solo 401(k).

For the 2024 tax year, you can save a maximum of $23,000 in a roth 401 (k). The maximum amount you can contribute to a roth 401(k) for 2024 is $23,000 if you’re younger than age 50.