2025 Solo 401k Contribution Limits 2025. You can make contributions up until april 15, 2025. This is up from $66,000 and $73,500 in 2025.
The irs maximum contribution to a solo 401k is $66,000 for 2025 (or $73,500 for those over age 50) and $69,000 for 2025 (or $76,500 for those over age 50). Solo 401k contribution limits 2025 irs.