Backdoor Roth Conversion Tax Question - When to File Form 8606 for Different Contribution Years?
So I'm trying to figure out this whole Backdoor Roth IRA conversion thing and I'm really confused about the timing and tax reporting. I contributed $6,500 to my traditional IRA in December 2024 (non-deductible because of income limits), then converted it to my Roth IRA in January 2025. My question is - which tax year do I report the Form 8606 for the non-deductible contribution? Does it go on my 2024 taxes that I'm filing now, or my 2025 taxes next year? And then when do I report the actual Backdoor Roth Conversion? I'm worried about messing this up and getting hit with penalties. Also, should I be waiting a certain amount of time between the initial contribution and the conversion to avoid IRS scrutiny? My coworker said something about a "step transaction" but I don't know what that means. Any help would be really appreciated! This is my first time trying the Backdoor Roth Conversion and I want to make sure I'm doing it right.
19 comments


Quinn Herbert
The non-deductible Traditional IRA contribution is reported on Form 8606 for the year you made the contribution, regardless of when you did the conversion. So in your case, you'd report the $6,500 non-deductible contribution on your 2024 Form 8606 (with the taxes you're filing now). The actual conversion from Traditional to Roth is reported on your taxes for the year the conversion happened. Since you converted in January 2025, you'll report that on your 2025 tax return (which you'll file in 2026). Make sure you keep good records of both transactions, as you'll need to reference the non-deductible basis when reporting the conversion next year.
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Salim Nasir
•I'm a bit confused still. If I contribute to a traditional IRA in 2025 but don't convert to Roth until 2026, do I still need to file form 8606 with my 2025 taxes? Or can I wait and do both on 2026 taxes? Also is there any benefit to waiting between contribution and conversion? I've heard mixed things about the step transaction doctrine.
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Quinn Herbert
•You would need to file Form 8606 with your 2025 taxes to report the non-deductible traditional IRA contribution, even if you don't convert until 2026. The form 8606 tracks your non-deductible basis in traditional IRAs, which is important regardless of when (or if) you convert. Regarding timing between contribution and conversion, the IRS has never officially ruled that the Backdoor Roth conversion violates the step transaction doctrine. Many tax professionals now recommend there's no need to wait between contribution and conversion. The Backdoor Roth has been widely used for years without IRS challenges, and the Tax Cuts and Jobs Act discussions even indirectly acknowledged it as a legitimate strategy.
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Hazel Garcia
After struggling with the exact same Backdoor Roth conversion issues last year, I found this amazing tool at https://taxr.ai that completely saved me. It analyzed all my contribution and conversion documents and walked me through exactly how to fill out Form 8606 correctly for both the contribution and conversion years. The most helpful part was that it explained how my non-deductible basis carried forward and showed me where each number needed to go on the form. It also flagged potential issues with my timing that might have triggered IRS questions. I was so confused about when to report what and on which year's tax return before using it.
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Laila Fury
•That sounds helpful, but does it work for more complicated scenarios? I've done backdoor Roth conversions for several years, but I also have existing pre-tax money in another IRA which complicates the pro-rata calculations on Form 8606.
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Geoff Richards
•How exactly does it help with the step transaction issue? I'm worried because I did a contribution and then converted it literally the next day. Will the IRS flag this as suspicious?
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Hazel Garcia
•It absolutely handles more complex scenarios. The tool specifically addresses pro-rata calculations when you have existing pre-tax IRA funds. It asks about all your IRA accounts and balances to ensure accurate calculations on Form 8606, then shows exactly how the pro-rata rule affects your conversion taxation. Regarding the step transaction concern, the tool actually explained that this is largely a non-issue now. It provided references to tax experts and IRS practice showing that immediate conversions are common and generally accepted. The system flagged that waiting between contribution and conversion is unnecessary, as the IRS has essentially accepted the backdoor Roth as a legitimate strategy through years of practice.
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Geoff Richards
I want to follow up about my experience with taxr.ai after mentioning my concerns about the step transaction doctrine. I decided to try it out and I'm honestly shocked at how helpful it was. The tool confirmed what others had said - that immediate conversion isn't really an IRS concern anymore - but it also provided actual documentation I could keep for my records explaining why. The best part was how it guided me through the exact reporting sequence for Form 8606. I had no idea I needed to report the non-deductible contribution for 2024 but wait until next year's taxes to report the conversion. It even created a personalized checklist with deadlines so I wouldn't miss anything. Definitely made the Backdoor Roth process way less stressful!
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Simon White
If you're struggling to get clear answers about your Backdoor Roth Conversion and Form 8606 questions, you might want to try calling the IRS directly. I know that sounds painful (it used to be for me too), but I discovered https://claimyr.com which completely changed my experience. I was confused about reporting my conversions since I had done multiple contributions across different years. I tried calling the IRS myself but kept getting disconnected after waiting over an hour. With Claimyr, they actually held my place in line and called me when an IRS agent was available. You can see how it works here: https://youtu.be/_kiP6q8DX5c The IRS rep gave me specific guidance on my exact situation with the Backdoor Roth reporting and Form 8606 that I couldn't find anywhere online.
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Hugo Kass
•Wait, how does this actually work? Does it somehow jump you ahead in the IRS queue? That seems too good to be true.
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Nasira Ibanez
•No way this works. I've literally spent DAYS of my life on hold with the IRS about similar issues. If this service actually connected you with a real person who gave helpful advice about Form 8606 reporting, I'll eat my hat. The IRS phone reps usually just read from scripts and can't answer complex questions like Backdoor Roth timing issues.
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Simon White
•It doesn't jump ahead in the queue - it just waits on hold for you. Basically, their system calls the IRS and navigates the phone tree, then stays on hold until an agent answers. When someone picks up, you get a call back so you can talk to the agent directly. It saves you from having to stay on hold yourself for hours. No, it's definitely not a scam. The IRS agent I spoke with was able to confirm exactly how to handle my situation where I had made contributions for multiple years but did the conversions in a single tax year. They walked me through the exact Form 8606 reporting requirements and confirmed I needed separate forms for each contribution year. Was way more helpful than I expected.
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Nasira Ibanez
I need to apologize and follow up on my skeptical comment about Claimyr. After struggling for another week trying to get clarity on my Backdoor Roth reporting, I broke down and tried the service. I'm completely shocked to say it actually worked exactly as described. I got connected to an IRS tax specialist in about 45 minutes (without me having to sit on hold!) who answered all my Form 8606 questions. They confirmed I needed to report my non-deductible contribution for the year I made it, regardless of when I did the conversion. They also explained how to handle my basis tracking across multiple years of backdoor conversions. Seriously saved me hours of frustration and uncertainty. Sometimes it's worth admitting when you're wrong!
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Khalil Urso
Another important thing to remember about the Backdoor Roth and Form 8606: if you have ANY other traditional IRA funds (including SIMPLE or SEP IRAs), the pro-rata rule applies and complicates things. You can't just convert the non-deductible contribution tax-free if you have other pre-tax IRA money sitting around. Example: If you have $50,000 in a traditional IRA already and add $6,500 non-deductible, then convert $6,500 to Roth, only about 11.5% of your conversion would be tax-free. The rest would be taxable because of the pro-rata rule.
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Myles Regis
•Is there any way around this pro-rata rule? I have an old traditional IRA with about $30k in it, but I still want to do backdoor Roth contributions without getting hit with taxes.
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Khalil Urso
•There is a potential workaround if your current employer's 401(k) plan accepts rollovers from IRAs. You could roll your existing traditional IRA funds into your 401(k), which would remove those funds from the pro-rata calculation. Once those pre-tax funds are out of any IRA, you can then do a clean backdoor Roth conversion without the pro-rata rule causing issues. Just make sure to complete this rollover to the 401(k) before December 31 of the year you're doing the conversion, as the pro-rata rule looks at IRA balances on that date.
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Brian Downey
Quick tip that helped me with Backdoor Roth reporting: make sure you're using good tax software that specifically supports Form 8606 and understands backdoor Roth conversions. I tried using a free filing service last year and it completely messed up my 8606 form - didn't properly track my basis and almost caused me to pay taxes twice on the same money!
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Jacinda Yu
•Which tax software would you recommend for handling Backdoor Roth contributions and Form 8606 correctly? I've been using TurboTax but wondering if there's something better.
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Liam Murphy
Great question about the Backdoor Roth timing! I went through this exact same confusion last year. Just to reinforce what others have said - you're absolutely correct that the Form 8606 for your non-deductible contribution goes on your 2024 tax return (the year you made the contribution), while the conversion gets reported on your 2025 return. One thing I learned the hard way: keep meticulous records of everything. I created a simple spreadsheet tracking contribution dates, amounts, conversion dates, and which tax year each gets reported on. This became invaluable when I had to reference my basis for subsequent conversions. Regarding the step transaction concern - I was worried about the same thing initially, but my CPA explained that the IRS has essentially accepted the Backdoor Roth through years of practice. There's no official waiting period required, and many people convert immediately without issues. The key is just making sure you're following the proper reporting procedures on the correct tax returns. Also, double-check that you don't have any other traditional IRA funds that would trigger the pro-rata rule - that's often the biggest gotcha that trips people up with Backdoor Roth conversions.
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