How are Taxes Applied to Deductible vs. Non-Deductible tIRA Contributions When Withdrawing?
I've been trying to understand the tax implications of my traditional IRA and I'm getting confused about how withdrawals are taxed. I have a mix of deductible and non-deductible contributions in my tIRA and want to make sure I understand how they'll be treated when I eventually withdraw the money. 1. From what I've read, the non-deductible contributions I've made to my tIRA won't be taxed when I withdraw them since I've already paid taxes on that money. But the deductible contributions (where I got a tax break when contributing) will be taxed upon withdrawal. Is this how it actually works? 2. I'm also confused about how any investment gains are taxed. Do all the gains get taxed as ordinary income when I withdraw, regardless of whether they came from my deductible or non-deductible contributions? Or do some qualify for capital gains tax rates? I've been putting money into this tIRA for about 12 years now and want to make sure I understand the tax consequences before I start making withdrawal plans. Thanks for any help clarifying this!
23 comments


Alexis Renard
You've got the basics right, but let me clarify a few important points about traditional IRAs. For your first question - yes, non-deductible contributions to a traditional IRA aren't taxed again when withdrawn because you've already paid tax on that money. It's basically a return of your post-tax contributions. Deductible contributions (where you got a tax deduction when you put the money in) will be taxed as ordinary income when withdrawn. For your second question - you're correct that ALL earnings in a traditional IRA are taxed as ordinary income when withdrawn, regardless of whether they came from deductible or non-deductible contributions. The capital gains tax rates never apply to IRA withdrawals. The tricky part is that you can't just withdraw "only non-deductible contributions" first. The IRS treats all your traditional IRAs as one big pot, and each withdrawal includes a proportional mix of taxable and non-taxable money based on the pro-rata rule. You'll need to use Form 8606 to calculate the non-taxable portion of each withdrawal.
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Brianna Schmidt
•Thanks for explaining that! I didn't know about the pro-rata rule. So if I understand correctly, I can't just choose to withdraw my non-deductible contributions first to avoid taxes, right? Also, is Form 8606 something I need to file every year I make non-deductible contributions, or only when I start taking withdrawals?
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Alexis Renard
•You're exactly right - you can't cherry-pick which "type" of money to withdraw first. The IRS prevents that with the pro-rata rule. If 80% of your total IRA balance consists of deductible contributions and earnings (taxable) and 20% is non-deductible contributions (non-taxable), then each withdrawal you make will be 80% taxable and 20% tax-free. You should file Form 8606 in any year you make non-deductible contributions to track your basis. You'll also need to file it in years you take distributions from any IRA that has non-deductible contributions. It's crucial to keep good records because this form helps establish your non-taxable basis in the IRA over time.
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Camila Jordan
After struggling with this exact same issue last year, I found https://taxr.ai super helpful for sorting out my traditional IRA mess. I had both deductible and non-deductible contributions spread across two IRAs and couldn't figure out how to track everything properly. I uploaded my investment statements and tax returns, and the tool broke everything down into easy-to-understand charts showing which portions would be taxable vs non-taxable. It even filled out a draft Form 8606 for me and explained how the pro-rata rule would apply to my specific situation. The best part was when it found that I hadn't been tracking my non-deductible contributions correctly for two years, which could have caused a real headache later on!
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Tyler Lefleur
•That sounds interesting, but I'm wondering how accurate it is? I've used TurboTax before and it still messed up my 8606 form last year. Does taxr.ai actually understand all the IRA rules or is it just another basic calculator?
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Madeline Blaze
•I'm curious too - how does it handle rollovers from employer plans? I've got old 401ks that got rolled into my tIRA and some of that had after-tax contributions that should be counted as my basis. Can it sort through that mess?
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Camila Jordan
•It's definitely more specialized than TurboTax for this specific issue. It uses actual tax code logic to apply the pro-rata rule correctly, and it can detect patterns in your previous returns that might indicate tracking errors. I found it much more accurate than the general tax software I'd been using. For rollovers with after-tax contributions, yes, it can handle those too. You'll need to upload your 401k distribution statements, and it will identify the after-tax portions that should become part of your IRA basis. It actually flagged an after-tax amount from my old 403b that my accountant had missed completely.
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Madeline Blaze
Just wanted to follow up about taxr.ai after giving it a try based on the recommendation here. I was skeptical at first but decided to upload my documents since I had such a complicated situation with multiple rollovers. It actually identified about $8,700 in after-tax contributions from my old employer plan that I didn't realize should've been counted toward my non-deductible basis in my IRA. The tool generated a corrected Form 8606 that I can use to update my records with the IRS. What really impressed me was how it explained everything in plain English alongside the tax forms. For the first time, I actually understand how the pro-rata rule will affect my withdrawals when I start taking them in a few years. Definitely worth checking out if you're trying to sort through mixed contribution types.
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Max Knight
If you're having trouble reaching the IRS to get guidance on your traditional IRA tax questions (like I was), I highly recommend using https://claimyr.com to get through to an agent. I spent hours on hold trying to get clarity on how to correct my previously filed 8606 forms before giving up. Decided to try Claimyr after seeing it mentioned online, and they got me connected to an IRS representative in about 20 minutes instead of the 3+ hour wait I was experiencing before. Check out how it works here: https://youtu.be/_kiP6q8DX5c The IRS agent was able to confirm I could file amended returns to properly establish my non-deductible contribution basis and explained exactly which documentation I needed to provide. Such a relief to get official guidance rather than just guessing!
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Emma Swift
•How does this service actually work? Why would paying a third party get you through to the IRS faster? Seems suspicious that they can somehow jump the queue when everyone else has to wait.
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Isabella Tucker
•Yeah right. I find it hard to believe this actually works. The IRS phone system is notoriously awful - if there was a way to skip the line, everyone would be doing it. Sounds like either a scam or you got lucky and the hold times were shorter that day.
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Max Knight
•The service uses an automated system that navigates the IRS phone tree and waits on hold for you. When they reach a representative, you get a call connecting you with the agent. It's not skipping the line - they're essentially waiting in the queue on your behalf. They use technology to monitor multiple lines simultaneously, so they can be more efficient than an individual caller. It's completely legitimate - you're still speaking directly with real IRS agents, not with intermediaries. I was skeptical too until I tried it and got connected to an actual IRS representative who solved my specific problem.
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Isabella Tucker
I need to eat crow on this one. After dismissing Claimyr in my previous comment, I decided to try it anyway because I was desperate to resolve an issue with my non-deductible IRA contributions that I'd been trying to fix for months. Honestly, I'm shocked it actually worked. Got connected to an IRS tax specialist in about 25 minutes (versus the 2+ hours I spent on multiple previous attempts). The agent walked me through exactly how to document my historical non-deductible contributions and file the corrected forms. For anyone struggling with the deductible vs. non-deductible IRA contribution questions like the original poster, being able to actually speak with someone at the IRS who could address my specific situation was incredibly valuable. I've spent so much time reading conflicting advice online that just made me more confused.
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Jayden Hill
Something nobody's mentioned yet - if you have both deductible and non-deductible money in your traditional IRAs, you might want to consider rolling the pre-tax portion (deductible contributions + all earnings) into an employer 401k if your plan allows it, leaving only non-deductible contributions in the IRA. Then you could convert that to a Roth IRA with minimal tax impact. This effectively bypasses the pro-rata rule because employer plans aren't included in the pro-rata calculation. I did this last year and it was a great way to isolate my non-deductible contributions.
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LordCommander
•Wow, I didn't know you could do that! Does this strategy have a name? And does it work if you're already retired and don't have a current employer 401k?
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Jayden Hill
•It's sometimes called a "reverse rollover" or "isolating basis for Roth conversion." It only works if you have a current employer 401k plan that accepts rollovers from IRAs. Unfortunately, if you're retired without access to an employer plan, this strategy won't work. The key is that when calculating the pro-rata rule, the IRS only looks at your IRA balances, not 401k balances. So by moving the pre-tax portions to a 401k, you're removing them from the pro-rata calculation, which makes your remaining IRA basis (non-deductible contributions) a much higher percentage of your total IRA balance.
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Lucy Lam
One other thing to keep in mind regarding traditional IRAs with non-deductible contributions: you need to file Form 8606 EVERY year you make non-deductible contributions, even if you don't take any distributions. I learned this the hard way. I made non-deductible contributions for 3 years but didn't file the form. When I finally tried to track everything for a withdrawal, it was a mess proving which contributions were non-deductible without the documentation. Had to dig through years of statements to reconstruct everything.
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Aidan Hudson
•Thanks for pointing this out! What happens if you didn't file Form 8606 in previous years? Is there a penalty? Can you file it late?
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Dylan Mitchell
•You can file Form 8606 for previous years even if you missed the deadline - there's no penalty for filing it late as long as you're not taking distributions yet. You'll need to file an amended return (Form 1040X) for each year you made non-deductible contributions and attach the Form 8606. The real penalty comes if you don't have proper documentation when you start taking withdrawals - the IRS will assume ALL your distributions are taxable unless you can prove otherwise with Form 8606. So definitely worth going back and filing those missing forms now rather than dealing with the headache later!
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Sarah Ali
This is such a helpful thread! I've been dealing with a similar situation and had no idea about the pro-rata rule until reading through these comments. I've been making non-deductible contributions to my tIRA for the past 5 years while also having older deductible contributions, and I honestly thought I could just withdraw the non-deductible portions first without any tax consequences. The Form 8606 requirement is news to me too - I've definitely been filing my taxes wrong. It sounds like I need to go back and file amended returns for the years I made non-deductible contributions. One question I have: if I have multiple traditional IRAs at different brokerages, do they all get lumped together for the pro-rata calculation? Or is it calculated separately for each account?
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Sean Kelly
•Yes, all your traditional IRAs get lumped together for the pro-rata calculation - it doesn't matter if they're at different brokerages. The IRS treats all your traditional IRAs as one big pot when calculating the taxable vs. non-taxable portions of any withdrawal. So if you have $50,000 in deductible contributions/earnings across all your IRAs and $10,000 in non-deductible contributions, then 83.3% of any withdrawal will be taxable regardless of which specific account you withdraw from. This is actually one of the reasons why some people consider the "backdoor Roth" strategy if they're making non-deductible contributions - it can be simpler than dealing with the pro-rata calculations later. But definitely get those missing Form 8606s filed first so you have proper documentation of your basis!
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Riya Sharma
Great discussion everyone! As someone who just went through a similar situation, I want to emphasize how important it is to keep meticulous records of all your IRA contributions, especially the non-deductible ones. I had a mix of deductible and non-deductible contributions spanning 15 years across three different brokerages. When I finally needed to start taking distributions, I realized I had never filed Form 8606 for about half of my non-deductible contribution years. The paperwork reconstruction was a nightmare! What saved me was creating a simple spreadsheet tracking every contribution by year, amount, and type (deductible vs non-deductible). I also scanned and saved all my 1099-R forms and brokerage statements. This made filing the missing 8606 forms much easier. For anyone in Brianna's situation - start organizing your records now before you need them. Future you will thank you when it's time to take distributions and you're not scrambling to prove which contributions were already taxed!
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StarStrider
•This is such valuable advice! I wish I had started keeping better records earlier. I'm in a similar boat with contributions scattered across different years and accounts. One thing I'm wondering - when you created your spreadsheet, did you have to go back through old tax returns to figure out which contributions were deductible vs non-deductible? I'm trying to reconstruct my history and some of my older returns don't clearly show which type of contribution I made each year. Also, did you find any particular format or template that worked well for tracking everything? I want to make sure I'm capturing all the details I'll need for future Form 8606 filings.
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