Solo Roth 401k Contribution Limits 2024 Date.  — the 401 (k) contribution limits for 2024 are $23,000 for individuals under 50, and $30,500 for those 50 and older.  — simply put, your solo 401k offers all the same benefits as a traditional 401k but with several distinct differences that include the highest contribution limits allowed.

The contribution limits are adjusted for inflation every year by the irs. Allowable roth solo 401k contributions.