How to properly write off construction materials for rental properties - tax deduction questions
I need some advice on how to properly write off construction materials for my rental property project. So here's my situation. I run a successful landscaping company where I'm hands-on with everything - on job sites daily, handling all the planning, material pickups, and preliminary bookkeeping before sending it to my accountant. We mainly install sod and I have 4 full-time employees working 40-50 hours weekly. Initially, we were seasonal, but back in 2022, I started flipping houses in winter to keep my crew employed year-round and take advantage of some tax benefits. I bought a complete fixer-upper that needed everything redone - framing, plumbing, electrical - basically a total rebuild. We're finishing it next month and hoping to sell it soon after. I've been writing off all the materials I purchased for this flip in the years I bought them. Recently, I purchased some land with plans to build rental condos. My long-term goal is to transition from landscaping to being a landlord. My 5-year plan was to continue the landscaping business while building my first 3 rental units, using the landscaping income to fund construction and save on taxes. Well, I just met with my accountant for tax planning and I'm completely deflated. They told me the land isn't deductible (which I knew), but also that construction materials for the rental condos aren't directly deductible - they need to be depreciated over 40 years! I was hoping to do this without involving banks. But if I can't deduct materials for buildings that will generate taxable income, I don't see how the math works with giving 30% to the government. I'm not trying to evade taxes, I just don't understand the logic. Two main questions: 1. Is there any legitimate way around the 40-year depreciation for building materials on rental properties? 2. Was I wrong to deduct the materials for my house flip from my landscaping business? Additional info: - LLC taxed as S-corp - Landscaping business nets about $200k annually after expenses - Usually purchase equipment to reduce taxable income I'm making good money, but I'm working 65+ hours weekly, had to visit the ER for heart issues, and developed anxiety. My family barely gets quality time with me. The rental property idea was my exit strategy, but now I'm questioning everything.
18 comments


Emma Bianchi
I'm a tax preparer who deals with a lot of real estate investors and contractors, so I can help clear some things up for you. First, for your house flip: Materials used in a flip should not be deducted as expenses when purchased. Instead, these costs are added to the "basis" of the property (essentially your total investment). When you sell the property, you'll pay taxes only on the difference between your selling price and your basis. This is treated as either capital gains or ordinary income depending on how long you've held the property and whether this is your primary business. For your rental property project: Your accountant is correct that construction materials for rental properties cannot be directly expensed - they must be capitalized and depreciated (usually over 27.5 years for residential rental property, not 40 years which is for commercial). However, there are some strategies that might help: 1. Cost segregation study - This allows you to identify components of your building that can be depreciated over shorter periods (5, 7, or 15 years instead of 27.5), which accelerates your deductions. 2. Section 179 and bonus depreciation - While the building structure itself must be depreciated over the longer period, certain qualified improvements and some building components might qualify for immediate expensing under these provisions. 3. Repair vs. improvement distinction - Repairs can be fully deducted in the year incurred, while improvements must be capitalized and depreciated.
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Mia Green
•Thanks for the detailed response! I'm trying to understand the flip situation better. If materials for the flip shouldn't have been deducted through my landscaping business, am I looking at a potentially serious tax issue now? I've been deducting these expenses for the past two years on my landscaping business returns. Also, with the rental properties, I've heard about cost segregation but wasn't sure if it applied to new construction. How much of a typical residential building can usually be segregated into those shorter depreciation categories? And would this be something I should discuss with a different accountant who specializes in real estate?
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Emma Bianchi
•For the house flip situation, you should definitely address this with your accountant soon. What you've done is essentially commingled two separate businesses, which could raise red flags. The flip expenses should have been tracked separately as part of a real estate development activity, not deducted against your landscaping income. This could potentially require amended returns, but your accountant can help determine the best path forward. Regarding cost segregation for new construction, yes it absolutely applies and can be very beneficial. Typically, 20-40% of a residential rental property's value can be reclassified into shorter recovery periods. Items like appliances, carpet, specialized electrical systems, landscaping, and even certain plumbing fixtures can qualify. I would recommend consulting with someone who specializes in real estate taxation and cost segregation studies. The savings can often far outweigh the cost of the study.
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Lucas Kowalski
Just wanted to share my experience with a service that saved me from a similar situation. I was flipping houses and building rentals while running a roofing business, and mixed up all my expenses in a similar way. My accountant was giving me the same confusing answers, so I uploaded all my receipts and tax docs to https://taxr.ai and they sorted everything out. They have this feature where they analyze your situation and tell you exactly how to categorize construction materials between flips (which get added to basis) and rentals (which get depreciated). They also identified a bunch of items from my new builds that qualified for accelerated depreciation, which I had no idea about. Their system even flagged the exact receipts from Home Depot that I had incorrectly expensed through my roofing business and showed me how to properly allocate them. Might be worth checking out since they specialize in construction and real estate businesses.
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Olivia Martinez
•How long did it take them to process everything? I've got a similar situation with my electrical contracting business and some rental rehabs I've been doing. Did you need to provide them with any specific documentation beyond receipts and tax returns?
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Charlie Yang
•I'm skeptical about these online tax services. Did they actually help with restructuring your filings with the IRS? How did they handle the previous years where you'd already filed incorrectly? That's my biggest concern with my situation.
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Lucas Kowalski
•The processing time was about 48 hours for my situation, which included 3 years of receipts and tax documents. Besides receipts and tax returns, I also provided my business entity documents (LLC operating agreement) and a spreadsheet of properties I was working on with their addresses and whether they were flips or rentals. For the previous incorrect filings, they provided me with a complete analysis showing which expenses needed to be reclassified from my roofing business to my real estate activities. They generated amended return drafts that my accountant used to fix the previous years, plus a detailed report explaining all the changes that I could provide if I ever got audited. They weren't just a band-aid solution - they actually helped me understand the correct structure going forward so I wouldn't keep making the same mistakes.
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Charlie Yang
I was in a similar situation mixing my plumbing business expenses with my rental property renovations. After trying taxr.ai from the recommendation above, I'm actually stunned by the results. They identified over $37k in misclassified expenses between my businesses and showed me exactly how to properly document everything. The most valuable part was their detailed explanation of how to handle renovations for rentals vs. flips. For my rentals, they separated out all the components that could be depreciated over 5-7 years versus the standard 27.5 years, which made a huge difference in my current deductions. They also showed me how my plumbing business could legitimately bill my real estate projects at market rates (with proper documentation) when performing specialized work. I was skeptical at first too, but after implementing their recommendations, my accountant was impressed with the level of detail and said this probably saved me from an audit. Definitely worth checking out if you're in construction and real estate.
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Grace Patel
Hey there - I went through something similar with my window installation business and rental properties. One thing that really helped me was getting through to an actual IRS agent who specialized in real estate and construction businesses. They walked me through exactly what I could and couldn't do with material deductions. Problem was, it took me literally weeks of calling to finally reach someone who could help. After that frustrating experience, I found this service called Claimyr https://claimyr.com that gets you through to an IRS agent usually within 15-45 minutes instead of waiting on hold for hours or getting disconnected. They have a video that shows how it works here: https://youtu.be/_kiP6q8DX5c With the complexity of your situation involving both flipping, new construction, and an existing business, I'd suggest speaking directly with the IRS to get clarity. The agent I spoke with explained exactly how to handle material purchases and even sent me specific IRS publications that addressed my situation.
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ApolloJackson
•How does this actually work? I've been trying to reach the IRS for weeks about a similar issue with my cabinet business and rental properties. Are they just calling for you or do they have some special access?
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Isabella Russo
•Sounds like a scam to me. No way anyone can get through to the IRS faster than the general public. The IRS phone system is notoriously bad and I doubt any service can magically fix that. You're probably just being charged for something you could do yourself.
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Grace Patel
•They don't have special access to the IRS - they use technology to navigate the IRS phone system for you. You enter your phone number and what department you need to reach, and their system calls the IRS, navigates all the prompts, and waits on hold for you. When they actually reach a live agent, you get a call back connecting you directly to that agent. The service costs money, but considering my time is worth way more than what I spent, it was totally worth it. They specifically helped me connect with the business tax department where I got answers about how to properly categorize construction materials between my installation business and my rental properties.
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Isabella Russo
Well I need to eat my words here. After my skeptical comment above, I decided to try Claimyr because I was desperate to resolve a similar construction/rental property issue that's been hanging over my head for months. I'm genuinely surprised to report that I got connected to an IRS agent within 27 minutes. The agent was incredibly helpful and walked me through the exact requirements for documenting material costs between my construction business and rental properties. They explained that I needed to maintain separate accounting for materials used in different business activities, and that proper invoicing between my businesses would help establish clear documentation. They even emailed me specific forms and publication references that addressed my situation. This one conversation saved me from potentially making a $22k mistake on my upcoming tax filing. The clarity I got was worth every penny, and now I have proper documentation should I ever get audited. I'm actually sleeping better knowing my businesses are properly structured tax-wise.
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Rajiv Kumar
One thing nobody's mentioned yet - you should look into establishing a separate entity specifically for your real estate development activities. I have a plumbing business and rental properties, and my CPA recommended setting up: 1. My original S-Corp for the plumbing business 2. An LLC taxed as a partnership for the rental properties 3. A separate LLC for property development/flips This way, there's no confusion about which expenses belong where. My plumbing business can legitimately bill my development projects at market rates for any plumbing work. For materials, I keep separate accounts and credit cards for each business to avoid commingling funds. For your specific situation, materials for your rentals will still need to be depreciated over time, but with the right entity structure and cost segregation, you can optimize your tax situation significantly. Just don't make the mistake of running everything through your landscaping business like I initially did with my plumbing company.
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Aria Washington
•Does having multiple entities create more paperwork and higher accounting costs? I'm in a similar situation with my flooring business and some rental properties, but my accountant charges me per entity for tax filings.
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Rajiv Kumar
•Yes, having multiple entities does increase paperwork and accounting costs. I pay about $800 more annually in accounting fees and have additional state filing fees. However, the tax benefits and liability protection far outweigh these costs in my situation. The biggest advantage is clarity - there's no question about which expenses belong to which business. This makes documentation much cleaner if you ever face an audit. It also helps with planning because you can see the true profitability of each venture. My landscaping business seemed less profitable than it actually was when I was running some development costs through it incorrectly.
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Liam O'Reilly
I've been doing exactly what you're trying to do for about 7 years now. Started with a painting company, moved into flips, and now have 11 rental units. Here's what I've learned: 1. For flips: You CANNOT deduct materials as expenses through your landscaping business. These costs are part of your "basis" in the property and offset your profit when you sell. You might need to amend previous returns if you've been doing this wrong. 2. For rentals: New construction costs are capitalized and depreciated over 27.5 years (residential). BUT - you can do a cost segregation study that lets you depreciate many components much faster (5-15 years). This can front-load deductions in the early years. 3. Entity structure: Consider having your landscaping business be a legitimate contractor for your real estate projects. Charge fair market rates, keep proper documentation, and you can move some profit that way. 4. 1031 exchanges: Look into these for your flips if you want to defer taxes and build your rental portfolio faster. Don't get discouraged! The tax rules for real estate actually favor investors once you understand them properly. My tax bill is way lower now than when I was just running my painting business.
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Chloe Delgado
•I'm curious about your point #3 regarding having your business be a contractor for your own real estate projects. I do electrical work and have rental properties too. How exactly do you document this to make sure it passes muster with the IRS? Do you create formal contracts between your entities?
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