Solo 401k Contribution Limits 2024. In 2024, you can contribute $23,000 to the roth portion of your solo 401 (k). The contribution limit on individual retirement accounts will increase by $500 in 2024, from $6,500 to $7,000.

With a solo 401 (k), depending on your salary and age, you can contribute $66,000 per year or $73,500 for those 50 or older in 2023. Solo 401(k) contribution calculator please note that this calculator is only intended for sole proprietors (or llcs taxed as such).