Solo Roth 401k Contribution Limits 2025. — in 2025, the contribution limit for a roth 401 (k) is $23,000, plus an additional contribution of $7,500 if you are age 50 or older. — a roth solo 401(k) offers the same contribution limits as a roth 401(k) with a normal employer.
Find out how much you can contribute to your solo 401k with our free contribution calculator. — in 2025, the contribution limit for a roth 401 (k) is $23,000, plus an additional contribution of $7,500 if you are age 50 or older.