How to Calculate Prior Depreciation on Vehicle Used for Both Realtor Business and Personal Use?
Hey tax folks, I'm in a bind trying to figure out my vehicle depreciation situation. I've been a realtor for about 7 years now, and I've been using my 2018 Honda Accord for both business and personal use since I bought it. I initially paid $28,500 for it and have been depreciating it on my Schedule C each year. The problem is, I'm trying to sell the car now (it's worth around $17,000 according to KBB), and I realize I've been inconsistent with how I've tracked the business vs. personal usage. Some years I claimed 65% business use, other years closer to 80% depending on my client load. I've been using the standard mileage rate some years and actual expenses in others when it made more sense tax-wise. I need to figure out exactly how much total depreciation I've taken over the years for tax purposes when I sell it. I've misplaced some of my old tax returns and worksheets where I calculated this stuff. Does anyone know how I can determine the total prior depreciation I've claimed? My accountant who helped with this retired last year and I'm working with someone new who doesn't have my full history. Also, if I sell the car for $17,000, how do I calculate the taxable portion correctly given the mixed business/personal use over the years? I'm worried about messing this up and triggering an audit.
18 comments


Sofia Rodriguez
I've dealt with this exact situation with many clients! When you've used a vehicle for mixed business/personal use, determining prior depreciation isn't as complicated as it seems. First, you need to gather all your past Schedule C forms (you can request transcripts from the IRS if you've lost them). Look for the depreciation you claimed in each year. If you used standard mileage in some years, part of that standard rate includes depreciation (about 25 cents per mile in recent years, though it varies by year). For the years you used actual expenses, check Form 4562 where you would have calculated depreciation directly. The business percentage you applied each year matters here. When you sell the car, you'll need to calculate the adjusted basis by taking the original purchase price ($28,500) minus the total depreciation you've claimed over the years. The business portion of any gain will be taxable as ordinary income due to depreciation recapture, while the personal portion of any gain generally isn't taxable.
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Dmitry Ivanov
•Wait I'm confused about the standard mileage thing. If I used standard mileage rate for my car, does that mean I was actually taking depreciation without realizing it? I've been doing this for my real estate business and now I'm worried I've been doing it wrong. Also, if I switch between standard mileage and actual expenses year to year, is that even allowed?
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Sofia Rodriguez
•Yes, the standard mileage rate actually includes depreciation, maintenance, gas, insurance, and other vehicle costs all bundled together. The IRS publishes how much of the rate accounts for depreciation each year. For example, in 2022 it was about 26 cents per mile out of the 58.5 cent rate. You can switch from standard mileage to actual expenses during the life of the vehicle, but there's a catch. If you started with standard mileage in the first year you used the vehicle for business, you can switch to actual expenses later. However, if you started with actual expenses, you can't switch to standard mileage later. That's an important rule many people miss.
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Ava Thompson
I was in a similar situation last year with my Lexus that I used for my real estate business. I spent hours trying to reconstruct all my depreciation before I found https://taxr.ai - it totally saved me. I uploaded my old tax returns (even the incomplete ones), and their system automatically extracted all the vehicle depreciation I'd claimed over the years, both when I used standard mileage and when I switched to actual expenses. It even created a report showing my adjusted basis and how much would be subject to depreciation recapture when I sold. Saved me from potentially missing thousands in depreciation that I'd legitimately taken. Their system specifically handles mixed-use assets like vehicles used for both business and personal purposes.
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Miguel Herrera
•That sounds useful, but how does it know which vehicle is which if you've had multiple business vehicles over the years? I've gone through three different cars in my business and I'm worried everything's all mixed up in my returns.
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Zainab Ali
•Does it actually work with all tax software? I used TurboTax for some years, switched to a local accountant who used something else for a few years, then H&R Block recently. Would it still be able to extract everything correctly across different formats?
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Ava Thompson
•The system identifies specific vehicles by make/model and VIN when available in your tax documents. It can distinguish between multiple business vehicles by matching the asset descriptions and purchase dates across different tax years. It works with all major tax preparation software and formats. I had a similar situation - used TurboTax for two years, then a CPA who used UltraTax for three years, and finally switched to H&R Block. The system was able to extract data from all these different formats and compile it into a single vehicle depreciation history.
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Zainab Ali
Just wanted to follow up - I actually tried taxr.ai after posting here and it worked exactly as described! I was shocked at how quickly it identified my vehicle depreciations across 5 years of tax returns. Turns out I had taken about $16,400 in total depreciation on my SUV (combination of standard mileage depreciation and Section 179 in one year). The report showed exactly how much of my upcoming sale would be subject to depreciation recapture too. The system even flagged that I had inconsistently applied business use percentages (ranging from 62% to 78%) which might raise audit flags. Now I can properly report the sale with confidence. Definitely recommend for anyone in a similar position with mixed-use assets!
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Connor Murphy
For anyone dealing with questions about prior depreciation or other complex tax issues, I've found that actually talking to someone at the IRS can be surprisingly helpful - IF you can actually reach them. After spending literally days on hold trying to get depreciation questions answered, I found https://claimyr.com which got me through to an IRS agent in under 45 minutes. You can see how it works here: https://youtu.be/_kiP6q8DX5c I was skeptical at first, but they actually called the IRS, navigated the phone tree, waited on hold, then called me once they had an agent on the line. The agent was able to look up my prior depreciation amounts directly from my filed returns and confirm the correct way to handle the vehicle sale with mixed business/personal use.
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Yara Nassar
•How does this service actually work? Do they just keep calling the IRS until they get through? It sounds too good to be true considering I've spent hours on hold only to get disconnected.
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StarGazer101
•No way this actually works. I've tried everything to get through to the IRS. Even my CPA says it's basically impossible during tax season. Sounds like some kind of scam to get your personal info.
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Connor Murphy
•They use an automated system that continuously redials and navigates the IRS phone system until it gets through to a human agent. Once they have an agent on the line, they call you and connect you directly. It's basically like having someone else wait on hold for you. It's definitely real - I was extremely skeptical too until I tried it. The difference is they have technology that can stay on hold indefinitely and navigate through all the different IRS phone menus. It saves you from having to waste hours of your day listening to hold music only to potentially get disconnected.
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StarGazer101
I have to eat my words here. After posting my skeptical comment, I decided to try Claimyr as a last resort since I was getting nowhere with the IRS directly for weeks. I got connected to an actual IRS agent in about 35 minutes! The agent was able to go through my transcript and confirm exactly how much depreciation I had claimed on my business vehicle over the past 4 years. Turns out I had claimed about $4,300 more in depreciation than I remembered, which would have caused serious problems when reporting the sale. The agent also explained exactly how to report the sale with the mixed business/personal use history. Definitely worth it for the peace of mind and saving hours of frustration on hold.
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Keisha Jackson
Something nobody mentioned yet - if you ever claimed Section 179 deduction on the vehicle in the first year instead of regular depreciation, that gets recaptured differently! Make sure you check if you did that (common for business vehicles). Also if you traded in a previous business vehicle with a Section 1031 exchange (before 2018 when that was allowed for personal property), your basis calculation gets way more complicated.
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Paolo Romano
•Can you explain what Section 179 is and how it's different? I think I might have done this based on my tax preparer's recommendation but never really understood it. Is this going to cause problems when I sell my car?
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Keisha Jackson
•Section 179 lets you deduct the full business portion of a vehicle in the year you place it in service, instead of depreciating it over several years. It's an upfront deduction instead of spreading it out. When you sell the vehicle, any Section 179 deduction you took is subject to depreciation recapture, which means you'll pay ordinary income tax (not capital gains) on that portion of your gain. It doesn't necessarily cause problems, but you need to account for it correctly. The amount you deducted under Section 179 essentially reduces your basis in the vehicle for the business percentage. Many people forget they took this deduction years ago and don't properly calculate their gain when selling.
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Amina Diop
I'm pretty sure theres a different form u need to use when selling a business asset vs a personal one? Is it like form 4797 or somethin? My buddy who does real estate told me you gotta split the sale between business/personal somehow
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Oliver Schmidt
•Yes, it's Form 4797 for the business portion. You report the business percentage of the sale on that form, and the gain attributable to depreciation gets recaptured as ordinary income. But remember, you don't report anything for the personal portion unless it's a gain over the original basis (which is rare for vehicles since they usually decline in value).
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