Solo 401k Contribution Limits 2024. 2024 solo 401(k) maximum contribution limits youtube, for individuals under age 50, the maximum contribution to 401(k), 403(b), and 457(b) plans increased to $23,000. In 2023, you can contribute a maximum of $22,500 as an employee salary deferral contribution.

This depends on the level of earnings from the business, as well as other factors. The irs announced that for 2024, the employee deferral limit for all 401 (k)s, including solo.