Total 401k Contribution Limit 2024 After Tax. Contribution limits for roth solo 401(k) roth contributions are included in your employee contribution limit (up to $23,000. And those 50 and over will be able to contribute an extra $7,500 for a total of.

And those 50 and over will be able to contribute an extra $7,500 for a total of. $2,583 monthly for an annual contribution limit of $31,000;