Question: are catch up contributions pre tax?
Answer: Roth 401(k) Catch-Up Contributions Catch-up contributions can also be made to Roth 401(k)s. ... "Unlike a regular 401(k) contribution, contributions to a Roth 401(k) are not made on a pre-tax basis, so the employee pays tax on $6,000 first, then contributes the extra $6,000 into the 401(k)," Falcon says.