Solo 401 K Contribution Limits 2025 Employer. Solo 401(k) contribution calculator please note that this calculator is only intended for sole proprietors (or llcs taxed as such). The 401 (k) contribution limit for 2025 is $23,000 for employee contributions, and $69,000 for the combined employee and employer contributions.

In 2025, you can contribute $23,000 to the roth portion of your solo 401 (k). What are the new solo 401k contribution limits for 2025?