Solo 401k Contribution Limits 2024 Irs. The irs allows a maximum contribution per taxpayer of $66,000 for 2023 and $69,000 for 2024 to a company 401k plan. One of the most prominent differences between a solo 401k vs simple ira is the contribution limits.

The defined contribution limit for 2023 is $66,000 (up from $61,000 in 2022). The irs maximum contribution to a solo 401k is $66,000 for 2023 (or $73,500 for those over age 50) and $69,000 for 2024 (or $76,500 for those over age 50).