By Dr. Jim Dahle, WCI Founder
In personal finance (and in the rest of life), there are no “dumb questions,” and I will try to cheerfully answer every question I'm given. I have certainly asked lots of questions that, in retrospect, seem dumb. But I've been answering this one about Backdoor Roth IRAs for years and years. (If you have no idea what a Backdoor Roth IRA is, read my Backdoor Roth IRA ultimate guide and tutorial first. Seriously. You need to know what it is. If you like, you can read the 3,500 comments below that post where you will see variations of this question asked dozens of times.)
At any rate, I decided long ago to write a blog post about it so I could just link to the post instead of typing out the answer over and over again in comments, the forum, and emails. Now, I'm republishing it for those who missed it the first time. If I sent you a link to this post in response to your question, please don't take personal offense. I don't think you're dumb, but it's way easier for me to post a link to a comprehensive answer to this question than to type this out every time.
Questions I Always Get Asked About the Backdoor Roth IRA
How to Account for the Pennies in Interest
Q.
I just did the Backdoor Roth IRA for the first time, and I was appalled to find out that, over the three days I had that $7,000 in a money market fund in the traditional IRA before conversion, it earned 37 cents in interest. Now, I'm afraid the IRS is going to come after me and repossess my dog. What should I do to keep the IRS at bay?
A.
These are questions that don't get asked by people who have done their own taxes for years. The reason why is they know you don't report cents on your taxes. You just round down or up. If you do a Roth conversion of $7,000.37, all the IRS knows (and cares about) is that you converted $7,000. Seriously, nobody cares about that 37 cents. You just got a free 37 cent Roth conversion!
Q.
But that 37 cents is actually still in the traditional IRA! I didn't actually convert it.
A.
Great. Leave it there until next year. Then, convert it.
Q.
Unfortunately, it turns out it wasn't 37 cents. It was 87 cents. Now what?
A.
You now have a taxable transaction, since you will round that up to $1. You will owe taxes on it. That could be as much as 45-50 cents added to your tax bill! Here's how you report it:
Easy peasy, right? By the way, if your tax preparer doesn't know what to do with it, send him a link to this post. (Dear tax preparer, please don't be offended if you were sent this link. I know the vast majority of your clients don't do Backdoor Roth IRAs.)
Q.
But now it's 2024, and money market funds actually pay interest. Now there is $5.65 still in the traditional IRA!
A.
Great. Same choices. Convert it to the Roth IRA (and owe a couple of bucks in tax on it) or leave it there, get pro-rated this year (paying $2 in tax on that $6), and clean it up on the 8606 next year (where that $6 will be converted tax-free along with your next $7,000 that you contribute for next year.)
More information here:
How to FIX Backdoor Roth IRA Screwups
Opening a “Business” to Get an Individual 401(k) for a Rollover
Here's another little trick a lot of people may not know about. Some people don't want to do a Backdoor Roth IRA due to the pro-rata issue. The Backdoor Roth IRA doesn't work so well if you have a business where you are making SIMPLE IRA or SEP-IRA contributions each year. But it does work very well if the only reason you aren't doing a Backdoor Roth IRA is because you have a big fat SEP-IRA, rollover IRA, or traditional IRA where you are no longer making contributions. (See line 6 of the 8606 above—you want it to be zero if you're doing the Backdoor Roth IRA.) There is always the option to just convert that tax-deferred IRA and pay the taxes on it, but if it is really large, that's probably not a good idea.
So, what can you do? You can start a business.
Step 1: Get an Employer Identification Number (EIN). It only takes five minutes, and it's free. You don't need an LLC or an S Corp or even a name separate from your own.
Step 2: Make some money. It doesn't have to be much. Ten dollars is fine, but even better if it is enough money that someone gives you a 1099. Babysit someone's kid. Mow your neighbor's lawn. Shovel a driveway. Do an online survey. Whatever. Make some money. Report it on Schedule C (lines 1, 5, 7, and 31) at the end of the year. Don't forget Schedule SE too. Congratulations! You're now self-employed! That wasn't so hard, was it?
Step 3: Open an individual 401(k) at Fidelity or eTrade. You can contribute 20% of your self-employed income if you like (report it on Form 1040), but it's not required.
Step 4: Roll that pesky IRA over to the individual 401(k) before December 31.
Step 5: Do the Backdoor Roth IRA as usual. (Contribute $7,000 to a traditional IRA, then convert it tax-free into a Roth IRA.)
Voila! You can now invest $7,000 a year ($14,000 a year if you do it for your spouse, too) in a tax-free and (probably) asset-protected account instead of your regular old taxable account.
More information here:
How I Failed and Then Mastered the Backdoor Roth IRA
The Backdoor Roth IRA When Life Is in Flux (and Why to Beware a Contribution in January)
What Does the IRS Say About Backdoor Roths?
The IRS didn't really weigh in about the Backdoor Roth IRA for years, leaving taxpayers and advisors wondering if the step transaction doctrine could ever be applied to it. I have yet to hear about a case where the IRS gave someone a problem (other than asking a few clarifying questions) about the Backdoor Roth IRA (please send me details if you know of one), and there has not been a tax court case resolving this issue. But I found out a few years ago that the IRS had at least said something about it, although what it said really didn't surprise me. As noted in this article in Financial Planning:
“Michael Kitces maintains that planners who do them right away, shuttling IRA money into a Roth without a waiting period, run the risk of incurring the IRS' wrath. The IRS guidance on the matter, however, would seem to allay those concerns.
‘There's no caveat about waiting,' the IRS says in an email via its spokesman Dean Patterson . . .
The IRS sent one of Marty McNamara's clients a worrisome letter triggered by a Roth conversion that could have produced an additional tax plus interest and penalties, he says. The client prepares his own tax returns, he adds.
The client's 1099-R forms showed the Roth conversion amount, McNamara says, while another form, Form 5498, showed the IRA contribution amount. Custodians automatically provide both forms to the client and to the IRS. Those two amounts had to match and they did, McNamara said, but the client failed to inform the IRS that he had no other IRAs.
‘After some coaching on my end,' McNamara, a CPA and the cofounder of Marrick Wealth in Irvine, Calif., says, ‘my client was able to respond to the IRS with a letter explaining the nondeductible IRA contribution and subsequent Roth conversion. He also included a copy of the 1099-R and Form 5498, explaining the basis in his IRA was equal to the conversion amount and that he had no other IRA balances, so the conversion was non-taxable. The IRS responded with a letter explaining [that] no further action or taxes [were] required based on the information provided. Of course, we were both pleased with the outcome.'”
Nobody in Congress or the IRS seems to really care. The only question is whether the law will change to allow high earners to make direct Roth contributions or whether the law will change to once again disallow high earners from making Roth conversions.
What do you think? Are you one of the dozens (hundreds?) of people who have had this question at one point? Do you have a pro-rata problem? Can you solve it by starting a (very small) business? Do you worry about the step transaction doctrine?
[This updated post was originally published in 2017.]
My question is about why/if the 8606 is required.
I did a backdoor Roth for the first time in 2024. My accountant has filed our tax return already (4/6 today), and I noticed in reviewing it that there is no 8606. I did provide him with the 1099R from vanguard, and he confirmed that he entered the information for the 7k back door, but said that his system didn’t generate the 8606 for some reason, and that he’d look into it after the 15th.
Reading all your posts, it sounds like the 8606 is necessary, and he’s pushing this off since its the busy season, setting me up for the need to submit an amended return, plus a $50 late fee, plus the additional hassle of the tax burden of the $1 of interest since my conversion was actually $7000.88).
But just to play devil’s advocate, is there any chance that he is right? Once I get the 5498 from Vanguard (not sure why that’s not available until may), will those show your contributions and basis?
Thanks in advance, really have found tremendous value in your content and insights!
Hi
I showed my tax preparer this link as she had initially incorrectly reported my back door Roth IRA contributions as taxable (as just a distribution).
Now she technically did fix some of the issues and lines 15c and 18 on form 8606 both show $0. Line 1 shows $0 and line shows $7004. I’m fairly certain she still filled out the form incorrectly and line 18 should show $4 as taxable. She stated that her software (H&R Block) would not allow her to fill out the form as shown on this website. How concerned should I be that the form is incorrect going forward and that my taxable amount is off by $4? Shouldn’t the $4 be reported on my 1040 line 4b?
If you did a $7004 conversion, you should owe and pay $4 in taxes, no? So yea, I’d put $4 on line 15c and 18. But I wouldn’t worry too much about the software issue. Lots of software fills it out slightly differently (but usually still accurately).
Thank you for confirming.
I was also worried because form 8606 shows that I had a $7004 basis in a traditional IRA due to the way her software apparently forced her to fill it out. She did the same on my wife’s return :/. I hope the IRS doesn’t come for the $9 we owe them at this time.
8606 gets screwed up by tax preparers all the time. Just today I’ve got a half dozen requests to help people with their 8606s, several of which are paying someone to prepare their taxes.
Hi, I am sorry if this has already been asked.
I completed my contribution of $7000 for year 2024 retroactively in the 2025 calendar year to my traditional IRA (looking back, will not do that ever again). I kept it in cash, but because Schwab does take several days/week to even allow the conversion, there was interest of $0.05 which accrued prior to conversion. So,$ 7000.05 was converted to my Roth account. I had asked for the full amount in the traditional IRA to be converted to the Roth.
Unfortunately, 2 months later, I see that the Traditional IRA account now has $0.02. Very annoying, not sure why the interest comes up when I asked everything to be converted in the first place.
The question is since I did a retroactive contribution/rollover was in 2025, do I need to do another conversion for the $0.02, or wait?
I know this falls into pennies rule and all, but since I am doing the 2025 contribution soon, I am not sure if there is an impact if the starting amount is not $0.
I plan to contribute the full limit to $7000 in a few months for 2025. If the 0.02 is left in the account, I am worried that the interest will accrue well over a few cents before the conversion is completed.
Moving forward I plan to do everything well before Dec 31, this year I did not realize how much harder it made everything.
Appreciate the input.
Don’t worry about it. When it’s time to do the conversion, convert the whole account.
My question is about why/if the 8606 is required.
I did a backdoor Roth for the first time in 2024. My accountant has filed our tax return already (4/7 today), and I noticed in reviewing it that there is no 8606. I did provide him with the 1099R from vanguard, and he confirmed that he entered the information for the 7k back door, but said that his system didn’t generate the 8606 for some reason. He maintains that the 8606 isn’t necessary as long as we “keep track” of the basis.
Reading all your content, it sounds like the 8606 is how you keep track of basis, but just to play devil’s advocate, is there any chance that he is right? Once I get the 5498 from Vanguard (not sure why that’s not available until may), will those show your contributions and basis?
Thanks in advance, really have found tremendous value in your content and insights!
I disagree. I think you need an 8606. Can you get away without it? Probably. I don’t think the IRS watches that sort of a filing too closely so long as you’re paying all taxes due. But your accountant should file it and I’m surprised his software didn’t generate it. Was the IRA contribution really non-deductible?
Please don’t let the IRS take my dog. One question I haven’t found any guidance on is leaving only residual credits in a Roth IRA.
In 2024, I opened a Roth IRA for 2023 and 2024 and didn’t realize I did not qualify for a Roth IRA. I recharacterized only my contributions to a TIRA, but I left the gains since I didn’t know what to do with the residuals.
I called Fidelity and the rep said I can leave the residual in the Roth IRA if I plan to convert the TIRA to a backdoor Roth IRA. The 6% tax on excess contributions is only for contributions. So would it be OK to leave the residuals in the Roth IRA?
I don’t think so. You have to recharacterize it all. Then when you convert it back, you’ll owe taxes on the gains. I think the rep gave bad advice.
Hello WCI.
I have a backdoor IRA question for you:
to put you in context:
I did our contribution in traditional IRA accounts ($7000 for me) and ($7000 for my wife) in the tenth day of December 2024, but it took us until the tenth of January 2025 to do the conversion process to Roth IRA , and also, both accounts accrued money for the time being in traditional IRA accounts before conversion($14 in my wife’s account and $10 in mine), I did the conversion of the whole amount of money in both accounts knowing that I have to pay taxes on those $14 and $10.
We did our taxes 2024 on January 31, 2025, but I did not fill out our form 8606 because it must be done the year that you do conversion so, I will do form 8606 for taxes 2025.
We have the required money for this year 2025 in saving already, my question is:
Can we do our backdoor Roth 2025 with money contribution 2025 also or not because we did already with money contribution 2024?
What I mean is we did a conversion this 2025 for our accounts with the money contribution 2024. Can we do another one right now with the money contribution 2025? And when it would be done will we have to fill out form 8606 for each process or only one form 8606 that contains the two processes together?
Thanks in advance. Please I apologize if my question is not right formulated, English is not my first language.
You probably need to do a 2024 8606 documenting the 2024 non-deductible contributions to track your basis. Sorry!
There is no such thing as a “2024 conversion or a 2025 conversion”. There is no time limit nor contribution limit on conversions, just on contributions. So yes, make your 2025 contribution and then convert it too. On your 2025 8606 you’ll report the 2025 contribution and the total amount converted in 2025 which would include your 2024 contribution, your 2025 contribution, and any earnings. One 8606 per person per year.