August 28, 2018 19:06 Updated Follow You can also make extra payments into your post-tax. This means your federal, state and Social Security taxes have already been withheld. Related articles How do I make voluntary post-tax contributions to my Defined Contribution account? Am I allowed to make voluntary contributions to my PERF plan? Where do I find employer forms? Why can’t new contributions be made to the CDBA past June 30, 2018? Where can I find training resources for ERM?