1099R and in-service conversion of after-tax contributions in 401k

I have a question about the tax consequence of in-service rollover of after-tax contributions and the associated pre-tax earnings from my 401k sub-account to my personal Vanguard Roth IRA account. I contributed after tax dollars to my retirement account in 2017. At the end of 2017 I requested the after-tax contributions ($9852) and the associated pre-tax earnings ($407) to be rolled over to my Vanguard Roth IRA account. As expected I received a single check payable to my Roth account administrator (Vanguard) and I promptly deposited the check into my Vanguard Roth IRA account. This month I received my 1099R from my 401k custodian and it doesn’t seem to have any amount as taxable income. Here is the relevant information:

Box 1 (Gross Distribution): $10,259
Box 2a (Taxable amount): $0
Box 2b (Taxable amount not determined): Not checked
Box 2b (Total distribution): Not checked
Box 3 (Capital gain): $0
Box 4 (Federal income tax withheld): $0
Box 5 (Employee contributions): $9852
Box 7 (Distribution code): G
Box 7 (IRA/SEP/SIMPLE): Not checked

Shouldn’t 1099R be showing $407 (pre-tax earnings from my after-tax contributions) as taxable, or maybe have Box 2b Taxable amount not determined checked?

Thanks.



You are corrrect. Box 2a should show 407.  This has been a fairly frequent 1099R error for plans, since they process the vast majority of direct rollovers to traditional IRAs where 2a is always 0. Force of habit. You should request a corrected 1099R, and the error is obvious enough that there should not be any resistance. The entry in Box 5 indicates that the issuer at one point did recognize that the distribution was headed to a Roth, otherwise 5 would be empty.

In the past some IRA institutions have been reluctant to perform this type of rollover conversion, which they call a “flying conversion”.  The reason is probably that they don’t want to become involved in dealing with the differences cited above in reporting by the institution that made the distribution.  But the IRS shouldn’t object when you report the rollover conversion even if the 1099-R ifrom the 401(k) plan isn’t corrected.  You will be reporting the conversion with $407 as taxable which is larger than the taxable amount of zero as reported in box 2a, so the IRS should have no objection.

This looks like a Form 1099-R reporting a rollover to a traditional IRA rather than to a Roth IRA.  Box 5 would still be expected to show $9,852 even if the rollover was to a traditional IRA, informing the employee that the rollover included $9,852 of after-tax basis.  If the plan believes that you requested a direct rollover to a traditional IRA, they will likely be resistant to changing the Form 1099-R.

I was on the phone with them yesterday and the csr insisted that he has been with the company for 5 years and he knows his stuff, and that my 1099R was in fact correct and I will owe taxes when I withdraw from the Roth IRA! I could not talk sense into him so I gave up and am on the phone again with another CSR today to see if this one understands the problem. I spelled out clearly for him that the form is correct if I were rolling over to TIRA instead of Roth IRA but I am not. Is there a downside to reporting the taxable income as $407 even without having the correct 1099R?

So I just got off the phone with the 401k custodian. They researched and came to the conclusion that since it was a trustee-to-trustee transfer, they cannot put a taxable amount and the 1099R is correct. According to them if I want to pay taxes on the pre-tax earnings then they suggested for the future to have the funds distributed out to myself instead of Vanguard and then mail Vanguard the check within 60 days. 401k custodian will withhold 20% taxes IIRC. Sigh…I will go ahead and report $407 as taxable in my tax return and hope for the best.

As prepared, by itself this Form 1099-R could also be interpreted reporting a split rollover under Notice 2014-54 with the pre-tax portion to a traditional IRA and the after-tax portion to a Roth IRA.  This could be what the CSR was assuming was being done (and which the CSR may have been doing for years even though Notice 2014-54 only recently made this explicitly permissible), despite the request to roll the entire amount to a Roth IRA.

This is very useful! In my communication with my custodian I copied and pasted the direct rollover to Roth IRA bit from 1099R instructions. That should be enough to back up my case. Thanks!

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