Solo 401k Contribution Limits 2024. If you're age 50 or older, you're. For 2024, you can contribute up to $69,000 to your solo 401 (k), or $76,500 if you're 50 or older.

The total solo 401 (k) contribution limit is up to $69,000 in 2024. If you have a traditional 401 (k), your contributions will reduce your taxable income for the year.