I see recommendations for a second cost segregation study after property improvements but am confused why this is necessary?
If I know what everything cost and have a reasonable estimate of what useful life bucket each expense would go into is that not enough?
I have detailed invoices and an Excel breakdown tracking $60k in renovations. Is it legally indefensible to self-allocate these costs into their respective useful life bucket for bonus depreciation purposes based on my allocation and receipts? In an audit, is a 'DIY' software or a full engineering-based study considered mandatory?
I’d love to hear the 'why or why not' from anyone who has an informed opinion.
Rental Property Investor · SE Michigan · Member since 2014 · 4k+ posts · 6k+ votes
7mo
No, you do not need a cost seg study to take these renovation costs and use them for bonus depreciation. That is a highly defensible position because you know exactly what you did and what the costs were.
The only thing you said that concerned me is you have a "reasonable estimate of what useful life bucket each expense would go into". The IRS is pretty prescriptive. There aren't that many gray areas so be sure you know.
Rental Property Investor · SE Michigan · Member since 2014 · 4k+ posts · 6k+ votes
7mo
No, you do not need a cost seg study to take these renovation costs and use them for bonus depreciation. That is a highly defensible position because you know exactly what you did and what the costs were.
The only thing you said that concerned me is you have a "reasonable estimate of what useful life bucket each expense would go into". The IRS is pretty prescriptive. There aren't that many gray areas so be sure you know.
No, you do not need a cost seg study to take these renovation costs and use them for bonus depreciation. That is a highly defensible position because you know exactly what you did and what the costs were.
The only thing you said that concerned me is you have a "reasonable estimate of what useful life bucket each expense would go into". The IRS is pretty prescriptive. There aren't that many gray areas so be sure you know.
I am just confused why people talk about doing a second cost segregation on renovations? What would be a case where you would need one? You forgot your receipts? Is it just when the total cost of renovations is high and you want an extra layer of "audit defenseiness"
No, you do not need a cost seg study to take these renovation costs and use them for bonus depreciation. That is a highly defensible position because you know exactly what you did and what the costs were.
The only thing you said that concerned me is you have a "reasonable estimate of what useful life bucket each expense would go into". The IRS is pretty prescriptive. There aren't that many gray areas so be sure you know.
I am just confused why people talk about doing a second cost segregation on renovations? What would be a case where you would need one? You forgot your receipts? Is it just when the total cost of renovations is high and you want an extra layer of "audit defenseiness"
For many people the renovations are small so bonus depreciation is small. In that case, to unlock the majority if the benefit, you would have to get a cost seg analysis.
I don't necessarily disagree. If you have detailed invoices and it's only $60k, you might not need to hire a 3rd party. The key is how detailed the invoices are. If you have an invoice that just says "electrical = $20k", that could cover multiple things that may qualify vs. not qualify. It would be incorrect to just say all of it qualifies unless you can support that with other documentation.
Real Estate Investor · Austin, TX · Member since 2017 · 95 posts · 23 votes
6mo
Greg and Gian are right — you don't need a paid study for $60k in renovations if you have detailed invoices and receipts. The reason people recommend a second cost seg after improvements isn't mandatory; it's useful when the renovation scope is large enough that a professional study can squeeze out additional classifications you might miss yourself (like identifying QIP vs. structural components, or catching partial asset dispositions on items that were replaced).
For your situation: $60k with itemized invoices is very defensible if you know which bucket each line item falls into. The main gotcha is that "electrical = $20k" on one invoice could cover both 5-year personal property (fixtures, outlets) and structural wiring (27.5-year). If your invoices are that granular, you're in good shape. If they're lumped, you may want a CPA familiar with IRC §168 to review your classifications before you file.
a paid study makes sense when the cost is small relative to the benefit, and the benefit is high when your property basis is large or improvements are complex. For $60k in renovations on a smaller property, self-classifying with a good CPA review is often totally reasonable — and that's exactly the position your detailed spreadsheet puts you in.
Accountant · Long Island, NY · Member since 2021 · 184 posts · 148 votes
6mo
For a smaller renovation, if you have detailed/itemized invoices and excel breakdown of the renovation, there's typically no need to pay for an improvement study.
With the invoices/excel breakdown, you essentially already have an improvement study. Your CPA would just need to capitalize the improvements to the correct asset classes.
Improvement studies make sense if your renovation is very extensive or you don't have itemized invoices to really break out the assets/improvements/components. However, for a renovation under $100k, there's marginal benefit to having an engineer review and conduct a study.
Tax Strategist| National Tax Educator| Accepting New Clients · Member since 2014 · 3k+ posts · 4k+ votes
6mo
No there's no need for a study AFTER renovations.
If the property was in service before the renovations were done then doing a cost segregation study first can provide a benefit because you get to write off some things twice essentially.
If you do a cost seg you have values for everything. If you dispose of an asset before it's fully depreciated you get to write off the remaining value.
So if you know your carpet is worth $5k and right after buying it you tear it out and replace it.
You get to write off that $5k.
Then you've put in new carpet and spent $8k and that's a 5 year asset which qualifies for bonus, allowing you to write off the cost of the new carpet as well.