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Ellie Kim

How to calculate basis for my residence turned rental property when selling

So I've owned this house for about 25 years now. I lived in it as my primary home for the first 20 years, and then around 5-6 years ago I moved out and started renting it to tenants. I'm thinking about selling it soon and I'm confused about how to figure out my tax basis. Would my basis be what I originally paid for the house way back when (plus improvements and whatnot), which would mean I'd be taxed on all the appreciation from the entire 25 years including when I lived there? Or would I use the fair market value from when I converted it to a rental 5+ years ago (plus any capital improvements I've made since then)? I've been taking depreciation deductions on my taxes since converting it to a rental, if that matters. Just trying to figure out how much of a tax hit I'm going to take when I sell. Thanks for any help!

Fiona Sand

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When you sell a residence turned rental property, your basis is basically split into two parts. You'll use the original purchase price (plus improvements made while you lived there) as your starting basis. But for calculating the gain, you use the LOWER of either the fair market value at the time of conversion OR your original adjusted basis. Here's what you need to do: Figure out what the property was worth when you converted it to a rental 5+ years ago. Compare that to your original cost basis (purchase price plus improvements). The lower of those two numbers becomes your basis for the rental period. Also, don't forget that you've been taking depreciation deductions for 5+ years, which reduces your basis further. You'll have to recapture that depreciation when you sell (typically taxed at 25%). Since you lived there 20 years and rented it 5 years, you may still qualify for some capital gains exclusion if you've sold within 3 years of moving out, but it sounds like you're beyond that window now.

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Thanks for the explanation. I'm a bit confused though - if I use the lower of FMV or original basis, wouldn't that increase my taxable gain? That seems unfair if the property appreciated during the years I lived in it. Also, do I need to get an official appraisal from when I converted it to prove the FMV at that time?

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Fiona Sand

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Using the lower of FMV or original basis is actually an IRS rule that prevents people from claiming losses on personal residences (which aren't deductible) by converting to rental first. If your property appreciated during your residence, the FMV at conversion would be higher than your original basis, so you'd use the original basis. You don't necessarily need a formal appraisal from 5+ years ago, but you do need reasonable documentation of the property's value at conversion time. Real estate listings of comparable properties, county tax assessments, or even a realtor's written opinion from that time can work. The more documentation you have, the better position you'll be in if questioned.

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I was in a similar situation last year and found that using taxr.ai really helped me figure out the complicated basis calculations. I had owned my house for 15 years, lived in it for 9, then rented it out for 6 before selling. Had no idea how to calculate the basis properly or what documentation I needed. I uploaded my original purchase documents and some comparable sale listings from when I converted it to a rental on https://taxr.ai and it analyzed everything and showed me exactly how to calculate the adjusted basis. It also helped me figure out the depreciation recapture, which I completely forgot about! The tool explained that my basis would be the lower of my original purchase price or the FMV at conversion, which in my case was the original purchase price since property values had risen. Saved me tons of headaches and probably an audit.

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Finnegan Gunn

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How long did it take to get an answer after uploading all your docs? I'm in a similar situation but need to make a decision pretty quickly on whether to sell or not.

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Miguel Harvey

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Did you need to have an actual appraisal from when you converted it, or did they accept other documentation? I didn't get an appraisal when I converted mine 4 years ago and I'm worried I won't be able to prove the FMV at time of conversion.

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The analysis came back really quickly - I think it took about 10 minutes after I uploaded everything. It's automated so you don't have to wait for a human to review it. I didn't have an official appraisal from the conversion date. I just uploaded some comparable home sales from my neighborhood around that time, plus the county tax assessment from that year. The system was able to use those to establish a reasonable FMV range. They actually explain that the IRS doesn't specifically require a formal appraisal, but you need some reasonable documentation to support the value you claim.

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Miguel Harvey

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Just wanted to update that I checked out taxr.ai after seeing the recommendation here. It was super helpful for my situation! I had converted my condo to a rental in 2020 and was stressing about selling it this year. I uploaded my purchase documents from 2012, some comparable sales listings from 2020 when I converted it, and my tax returns showing depreciation. The analysis showed me that my original basis was $185,000, but the FMV at conversion was around $260,000, so I needed to use the original basis for calculating gain. It also calculated my depreciation recapture amount. The most helpful part was that it created a detailed report showing exactly how to fill out Form 4797 and Schedule D for the sale. Definitely recommend if you're in this situation - it removed all the guesswork!

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Ashley Simian

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If you're having trouble getting clarity on your basis calculation, try Claimyr to get through to an actual IRS agent. I spent weeks trying to call the IRS directly about my rental property conversion basis issue last year and kept getting disconnected or waiting for hours. Finally used https://claimyr.com and they got me connected to the IRS in about 20 minutes. There's a video showing how it works here: https://youtu.be/_kiP6q8DX5c The IRS agent was actually really helpful and walked me through the whole calculation based on my specific situation. They confirmed that I needed to use my original purchase price (since that was lower than FMV at conversion), calculate my adjusted basis with improvements, and then account for depreciation. Made a huge difference in my tax bill because I was calculating it all wrong before.

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Oliver Cheng

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Does this actually work? I've literally been trying to reach the IRS for three months about a rental property question. How does Claimyr get you through when nobody else can?

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Taylor To

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Sounds sketchy to me. Why would I pay a third party just to talk to the IRS? And are you sure the advice you got was correct? The IRS phone reps aren't always tax experts and make mistakes too.

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Ashley Simian

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It works by using their system that navigates the IRS phone tree and waits on hold for you. When they reach a human, they call you and connect you directly to the agent. I don't know exactly how they do it, but it worked for me when I couldn't get through myself. The advice I got was consistent with what my accountant told me later, but I understand your skepticism. I verified the information with IRS Publication 527 afterward. The benefit was getting personalized guidance for my specific situation rather than trying to interpret the publications myself. The agent was in the specialized rental property department, not just a general phone rep.

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Taylor To

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I was super skeptical about Claimyr but got desperate after trying to reach the IRS for weeks about my rental property basis questions. Honestly, it worked exactly as advertised. Got a call back in about 25 minutes and was connected to an IRS agent who specialized in investment properties. The agent confirmed that I needed to use my original purchase price as basis since my home had appreciated during the time I lived there. He also explained that I needed to recapture all the depreciation I'd taken (and even depreciation I SHOULD have taken but didn't) at 25% tax rate. Most importantly, he told me exactly which forms to use and how to document everything. Saved me thousands in potential penalties for doing it wrong. The time saved was worth every penny considering I had wasted hours trying to get through myself.

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Ella Cofer

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Something important nobody mentioned yet - if your property decreased in value while you lived there (before converting to rental), you actually use the LOWER of your original cost or the FMV at time of conversion as your basis for depreciation/future gain. In other words, you can't convert a personal residence to a rental to claim a loss that happened during personal use. The IRS is smart about these things! Also, make sure you've been tracking all capital improvements separately from repairs. Improvements add to your basis, repairs don't. This can make a huge difference in your tax bill.

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Kevin Bell

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Can you give examples of what counts as capital improvements vs repairs? I've been replacing things over the years in my rental and just lumping it all together.

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Ella Cofer

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Capital improvements substantially add value to the property or extend its life, while repairs just maintain the property in good condition. Examples of capital improvements: new roof, room addition, completely new HVAC system, kitchen remodel, new windows throughout, adding a deck. Examples of repairs (not capital improvements): fixing a leaky faucet, repainting, replacing a broken window, fixing part of the roof, repairing the existing furnace. The key difference is whether you're maintaining the existing property (repair) or actually improving/extending the life of the property (capital improvement). Keep receipts and documentation for all capital improvements as they increase your basis and reduce your taxable gain when you sell.

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Has anyone used a 1031 exchange when selling a rental that was previously their primary residence? I'm in the exact same boat (lived in house 18 years, rented it out for 7 years, now selling) and wondering if I can defer the gains by buying another investment property.

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Felix Grigori

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Yes, you can absolutely do a 1031 exchange with a former primary residence that's now a rental. The property just needs to be investment property at the time of sale and have been used as such (not personal) before selling. The 5+ years as a rental should qualify easily. Just remember you have 45 days after selling to identify potential replacement properties and 180 days to complete the purchase. Also need to use a qualified intermediary to hold the funds - you can't touch the money yourself or the exchange will be disqualified.

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Liam McGuire

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This is a really complex situation that trips up a lot of people! Just to clarify a few key points that might help: 1. Your basis for calculating gain will be your original purchase price plus any capital improvements made during the entire ownership period (both personal and rental use). 2. The depreciation you've been taking for 5+ years will need to be "recaptured" when you sell - this means you'll pay tax on that depreciation at a 25% rate regardless of your regular capital gains rate. 3. Since you moved out more than 3 years ago, you unfortunately won't qualify for the $250K/$500K capital gains exclusion that applies to primary residences. 4. The good news is that any capital improvements you made during ALL 25 years of ownership (not just the rental period) will increase your basis and reduce your taxable gain. Make sure you have good records of the fair market value when you converted to rental - even if it's just comparable sales data or tax assessments from that time. The IRS may ask for documentation if audited. Consider consulting with a tax professional given the complexity and potential tax implications!

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This is really helpful, thanks for breaking it down so clearly! I'm in a similar situation but only converted my home to rental 3 years ago. One question - you mentioned that capital improvements from ALL 25 years count toward basis. Does that include things like a new roof or HVAC system I installed while I was still living there as my primary residence? I always thought those only counted if done during the rental period. Also, when you say "recapture" the depreciation at 25% - is that 25% of the total depreciation I claimed, or is the depreciation taxed at a 25% rate? I want to make sure I'm calculating this correctly for my own situation.

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