Solo 401k Contribution Limits 2024 Over 50. For 2023, the solo 401(k) contribution limits are $66,000 or $73,500 if you are at least age 50. For 2024, the 401(k) contribution limit for employees is $23,000, or $30,500 if you are age 50 or older.
Participants who are 50+ can save an additional. Employees 50 or older can contribute up to $30,500 with catch.