Roth 401k Contribution Limits 2024 Over 50. If you convert this portfolio all at once, you will pay an effective federal tax rate of 32.52%, or about $325,208 in taxes. The total employee contribution limit to all 401 (k) and 403 (b) plans for those under 50 will be going up from $22,500 in 2023 to $23,000 in 2024 (compare that to the $2,000 it increased.

Those 50 and older can contribute an additional $7,500. If you’re age 50 or older, you can make an.