Form 3115 - How to correct excess depreciation on rental conversion?
So I messed up pretty bad when I turned my main house into a rental years ago. Instead of using my original purchase price for the cost basis calculation, I used the fair market value (which was higher) and that totally threw off my depreciation numbers. Fast forward several years, and I just realized I've claimed about $26k in excess depreciation over this whole time. Oops. I've been researching and it looks like Form 3115 with Designated Change Number 7 might be my solution. But I want to make sure I'm doing this correctly: - Submit Form 3115 with DCN 7 - Complete a 481(a) adjustment showing the positive $26k adjustment - Fix this year's depreciation schedule to use the correct amounts going forward - Add the full $26k to Other Income on my Form 1040 (I'd rather take the hit all at once than spread it out) Do I also need to amend my previous three years of tax returns, or does the 3115 take care of everything? Just trying to clean this up properly and avoid future headaches with the IRS. Any advice is appreciated!
23 comments


Kayla Morgan
You're definitely on the right track! When you convert a primary residence to a rental property, you should use the lower of your adjusted basis (purchase price plus improvements minus any depreciation) or the fair market value at the time of conversion. Form 3115 with DCN 7 is indeed the correct approach for fixing depreciation errors. The beauty of using Form 3115 is that you don't need to amend prior year returns - that's one of its main benefits. The 481(a) adjustment lets you catch up and correct the error. For the 481(a) adjustment, you have two options: take the full $26k in income this year as you suggested, or spread it over 4 years ($6,500 per year). Both are legally acceptable - it just depends on your tax situation and preference. Make sure you're using the correct depreciation method going forward based on the proper basis. Also, attach the Form 3115 to your current year return and send a copy to the IRS office in Ogden, UT as specified in the instructions.
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James Maki
•Thanks, this is super helpful! One question though: If I decide to spread the adjustment over 4 years instead of taking it all at once, where exactly does that go on my tax forms each year? Is it still under "Other Income" on the 1040?
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Kayla Morgan
•Yes, for each of the four years, you would report the portion of the Section 481(a) adjustment ($6,500 in your case) on Schedule 1, Part I, Line 8z, "Other Income," and write "Section 481(a) adjustment" on the dotted line. If you're using tax software, there should be an option to add miscellaneous or other income where you can label it properly. Just make sure you keep good records of this adjustment so you can properly report it for all four years and remember to include it on future returns.
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Jasmine Hancock
I went through something similar last year with my rental and used taxr.ai (https://taxr.ai) to help me figure out the depreciation mess I'd created. I was also using the wrong basis calculation but didn't realize it for years! Their system actually identified my depreciation errors when I uploaded my previous tax forms and property documents. They have tax professionals who specifically handle real estate issues and Form 3115 situations. Saved me a ton of time figuring out the exact adjustment amount and how to properly complete the form. The best part was they showed me how to document everything correctly to avoid raising audit flags with the sudden adjustment. Definitely worth checking out if you want professional guidance on fixing this.
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Cole Roush
•Did they help you figure out if you should take the hit all at once or spread it over 4 years? I'm in a similar situation but I'm concerned about triggering an audit if I suddenly report a big adjustment.
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Scarlett Forster
•How much verification did you need to provide? I have old property records but I'm missing some of the improvement receipts from when I first bought the place, which makes calculating my true basis difficult.
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Jasmine Hancock
•They actually ran some calculations to show me the tax impact both ways and helped me decide the best approach for my situation. In my case, spreading it over 4 years made more sense because I was expecting higher income in future years and didn't want to stack too much in one year. They said either way is legitimate - the IRS just wants the correction made. For documentation, they were surprisingly helpful with that too. I didn't have all my improvement receipts either, but they helped me create a reasonable estimate based on the type and timing of improvements, along with looking at my mortgage documents and property tax records. They emphasized documenting my methodology so I could explain it if ever questioned.
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Scarlett Forster
Just wanted to follow up after using taxr.ai for my rental property depreciation issue! After seeing the recommendation here, I uploaded my previous tax returns and property info, and they pointed out I'd actually been under-depreciating my rental (opposite problem from most people). Their specialists walked me through the whole Form 3115 process and helped me calculate the exact adjustment. They even provided a detailed explanation document I could keep with my tax records in case of future questions from the IRS. What impressed me most was how they explained everything in plain English - I finally understand the whole "basis at conversion" concept that I've been getting wrong for years. Definitely a weight off my shoulders getting this fixed!
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Arnav Bengali
Have you tried calling the IRS directly about this? I had a similar issue and spent WEEKS trying to get through to someone who could actually help. Finally used Claimyr (https://claimyr.com) to connect with an IRS agent - they have this system that navigates the IRS phone tree and gets you a callback when an agent is available. I was super skeptical, but you can see how it works here: https://youtu.be/_kiP6q8DX5c The IRS agent I spoke with confirmed exactly what you're planning to do with Form 3115 is correct and gave me additional pointers specific to my situation. Way better than guessing or relying solely on internet advice (no offense to everyone here). Getting direct confirmation from the IRS gave me peace of mind.
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Sayid Hassan
•How long did it take to actually get the callback? Last time I tried calling the IRS myself, I was on hold for 2+ hours before giving up. Does this service really work?
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Rachel Tao
•Sounds like a scam TBH. Why would I pay some random company to call the IRS for me when I can just do it myself? Did they ask for any personal info? Not sure I'd trust some third party with my tax details.
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Arnav Bengali
•The callback came within about 45 minutes for me. The service doesn't replace your call - it just handles the waiting part. They call the IRS, navigate the menu options, wait on hold, and then when an agent is about to come on the line, they call you to connect. So I was able to go about my day instead of being stuck listening to hold music. They don't ask for any tax details or personal information beyond your phone number. You're the one who speaks directly with the IRS agent - Claimyr just handles the connection part. I was hesitant too, but I was desperate after trying to get through on my own for weeks. Completely understand the skepticism though - I had the same reaction initially!
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Rachel Tao
I need to eat crow here. After my skeptical comment, I decided to try Claimyr anyway because I was desperate to talk to someone at the IRS about my own depreciation issue. Got a callback in about 30 minutes and spoke directly to an IRS agent who was actually helpful! The agent confirmed that Form 3115 with DCN 7 is exactly what I needed and that I didn't need to file amended returns. She also explained that I could choose between taking the full hit this year or spreading it over 4 years, depending on what works better for my tax situation. For anyone dealing with depreciation issues, getting direct confirmation from the IRS is really valuable. Never thought I'd say this, but I'm glad I tried the service after doubting it.
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Derek Olson
Something to consider - when you file Form 3115, you're absolutely correct that you don't need to amend prior years' returns, but you should also be aware there's a mandatory spread of the Section 481(a) adjustment over 4 tax years if the net adjustment is greater than $50,000. Since yours is $26k, you have the option to take it all at once or spread it out. If you're in a lower tax bracket this year compared to future years, taking the hit all at once could make sense. Otherwise, spreading it over 4 years would soften the blow.
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Danielle Mays
•Wait, I thought the 4-year spread was required for all positive 481(a) adjustments? My accountant insisted we had to spread mine out when I fixed a similar depreciation error last year. Now I'm confused...
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Derek Olson
•The 4-year spread is mandatory only if the net Section 481(a) adjustment exceeds $50,000. For adjustments under that threshold, you can choose to take it all in one year or spread it over 4 years. Your accountant might have recommended spreading it out because it's often more tax-efficient, or they might have been confusing it with the mandatory spread rule. The IRS instructions for Form 3115 state: "In general, a positive adjustment is taken into account in the year of change, and a negative adjustment is taken into account over four tax years." But there are exceptions that allow spreading out positive adjustments, and the $50,000 threshold is one such provision in the revenue procedures.
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Roger Romero
Has anyone considered the impact this might have on the passive activity loss limitations? I made a similar mistake and when I corrected it, I had to recalculate my PAL carryovers because the lower depreciation affected my passive income/loss calculations for multiple years.
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Anna Kerber
•That's a really good point! When I fixed my depreciation with Form 3115 last year, it affected my passive activity loss calculations as well. Less depreciation meant more passive income in prior years, which changed how much of my suspended losses I could use going forward. I'd recommend carefully reviewing your Form 8582 for the past few years to see how the adjustments might impact your PAL situation. In my case, I had to recalculate my suspended losses even though I didn't have to amend prior returns.
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Zara Shah
Just to add some perspective from someone who went through this exact situation - I also used FMV instead of adjusted basis when I converted my primary residence to rental property a few years back. The mistake cost me about $18k in excess depreciation over 4 years. I filed Form 3115 with DCN 7 last year and can confirm it's much smoother than you might expect. The key things that helped me: 1. I chose to spread the 481(a) adjustment over 4 years since I was already in a higher tax bracket and didn't want to push myself even higher 2. Made sure to attach a detailed explanation of how I calculated the adjustment (showing original basis vs. what I incorrectly used) 3. Updated my depreciation software to use the correct basis going forward The IRS processed it without any issues or follow-up questions. No amended returns needed, which was a huge relief. One tip: if you're doing this yourself, double-check your math on the 481(a) adjustment calculation - that's where most people make errors according to my CPA. Good luck getting this sorted out! It feels great once it's behind you and you know everything is correct going forward.
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Nia Jackson
•This is really encouraging to hear from someone who went through the exact same situation! I'm definitely leaning toward spreading it over 4 years since I'm expecting my income to increase in the coming years. Quick question about the detailed explanation you attached - did you include a year-by-year breakdown of the excess depreciation, or just the total calculation? I want to make sure I provide enough detail without overdoing it. Also, what depreciation software did you end up using to get the calculations right going forward? Thanks for sharing your experience - it's reassuring to know the IRS processed it smoothly!
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Freya Andersen
I'm dealing with a similar depreciation mess on my rental property and this thread has been incredibly helpful! I made the same mistake of using FMV instead of adjusted basis when I converted my home to a rental about 3 years ago. One thing I'm still unclear on - when calculating the 481(a) adjustment, do I need to account for any improvements I made to the property between the original purchase and the conversion date? I added a deck and updated the kitchen during the time I lived there, so my adjusted basis should be higher than just the original purchase price, right? Also, for those who chose the 4-year spread option, do you report it as ordinary income each year, or does it get special treatment since it's related to depreciation recapture? I'm trying to plan out the tax impact before I file the Form 3115. Thanks to everyone for sharing their experiences - it's so much better than trying to figure this out from just reading IRS publications!
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Zoe Papadopoulos
•Yes, you're absolutely right about including improvements in your adjusted basis calculation! Any capital improvements you made while it was your primary residence (like the deck and kitchen updates) should be added to your original purchase price to get your true adjusted basis at conversion. Make sure you have documentation for those improvements - receipts, permits, contractor invoices, etc. The adjusted basis at conversion should be your original purchase price + qualifying improvements - any depreciation you may have claimed if you had a home office. Regarding the 4-year spread, it's treated as ordinary income each year, not capital gains. It goes on Schedule 1, Line 8z as "Other Income" with "Section 481(a) adjustment" noted. So yes, it will be taxed at your regular income tax rates, which is why the 4-year spread can be beneficial if you're in higher brackets. I'd definitely recommend getting professional help with the calculation if you have significant improvements to account for - it can get tricky to determine what qualifies and how to properly calculate the adjustment amount.
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GalacticGuru
I went through this exact same situation two years ago and can confirm you're on the right track with Form 3115 and DCN 7. The relief of finally getting it sorted out is huge! One thing I'd add that hasn't been mentioned yet - make sure you keep really detailed records of your correction process. I created a spreadsheet showing year by year what I claimed vs. what I should have claimed, along with supporting documentation for my original purchase price and any improvements. This came in handy when I got a notice from the IRS about 8 months later (not an audit, just a clarification request). Having everything organized made it easy to respond, and they accepted my documentation without any issues. Also, if you're using tax software, some programs don't handle Form 3115 very well, especially the 481(a) adjustment calculations. I ended up having to do mine by hand and attach it as a PDF. Just something to keep in mind if your software seems to be calculating things incorrectly. The peace of mind of knowing everything is correct going forward is worth the hassle of fixing it properly!
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