Solo 401k Contribution Limits 2024 Over 50. For 2024, the solo 401(k) maximum contribution limit for the elective deferral is $23,000 if you’re age 50 and under. Employees will be able to sock away more money into their 401 (k)s next year.

For 2024, the 401(k) contribution limit for employees is $23,000, or $30,500 if you are age 50 or older. Employees can invest more money into 401 (k) plans in 2024, with contribution limits increasing from 2023’s $22,500 to $23,000 for 2024.