Mega Backdoor Roth Contribution Questions

We have a client setting up a Mega Backdoor Roth contribution in his 401(k) Plan.  The question is, does that contribution need to show up on his W2?  I didn't think so, but I wanted to confirm.

Thank you in advance!

Aside from showing enough in wages to justify the 415(c) level, the amount contributed as after-tax prior to Rothification wouldn't typically also be listed.

VATs may but need not be reported on W2. Just answered this for a client this morning. Google is a wonderful thing.

Generally, according to the instructions to IRS Form W-2, Wage and Tax Statement, an employer may, but is not required to, report non-Roth, after-tax contributions on Form W-2 in Box 14.