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Level 3
posted Mar 30, 2025 12:12:30 PM

401k after tax box 12 shown as AA, should I wait for employer fixes?

There is an issue on my W2. I have 2 job, I maxed out in first job all 401k limit.
in my 2nd job, I did 2 after-tax contribution in 2024.

$61.54 * 2 = $123.08

There are reported as AA in box 12a-d in my W2 (second employer).
These are after tax contribution. Not Roth 401k contributions. They should fix this error on my W2 by removing this 123.08 from box 12 AA.
Empower does not have 401k Roth conversion for my second employer. These after-tax 401k contribution are not in Roth. After-tax 401(k) contributions does not have code in box 12 on W-2, although the employer can note them in box 14 for informational purposes.
https://www.irs.gov/retirement-plans/common-errors-on-form-w-2-codes-for-retirement-plans


https://ttlc.intuit.com/community/retirement/discussion/if-the-contributions-were-after-tax-contributions-to-the/01/260447#M22193


Now, I am 99% sure that I am right, and the W2 is wrong. The employer is known for being slow and I doubt they will be able to fix it in time for Apr 15th.

Should I file it by removing that AA line now or should I wait the wrong one first and file 1040x when employer fixes it eventually?
If I file as it is, I will be overcontributing my 401k by $123.08 dollars.

Any help will be appreciated!!

0 3 1125
3 Replies
Level 15
Mar 30, 2025 7:28:56 PM

I suggest requesting a filing extension and obtaining a corrected W-2.

Level 3
Mar 31, 2025 8:36:41 PM

Great idea.

But you agree with my assessment that Payroll was wrong about using AA for After-tax?
Thank you.

Level 15
Apr 1, 2025 6:12:14 AM

Code AA is only to be used report employee elective Roth contributions (subject to elective deferral limits) to the 401(k).  After-tax contributions are not reportable, but are permitted to be shown in box 14 for informational purposes only.