Solo Roth 401k Contribution Limits 2025. Contribution limits are the same for the employee portion, whether you use a roth solo 401 (k) or a traditional solo 401 (k). Roth 401 (k) contribution limits for 2025.

A solo 401(k) is unique because the business owner and the employee are the same person. Therefore, if age 50 or older in 2025 the employee roth.