Cost segregation studies come up in almost every conversation I have with commercial real estate operators at a certain portfolio size. Someone mentions them at a closing dinner, a broker drops the term, or a peer says their last acquisition saved them six figures in year-one taxes. What almost never happens is someone sitting down and walking through whether the strategy actually makes sense for a specific asset, at a specific price point, with a specific exit timeline in mind.
That is what this is.
The short answer: cost segregation is a legitimate, IRS-approved strategy that can accelerate your depreciation deductions and meaningfully reduce your tax liability in the years you hold a property. But it defers taxes rather than eliminating them, and the economics look different depending on your asset value, your tax position, your holding period, and the current bonus depreciation rules in effect when the property is acquired. For operators with active deal pipelines in Austin and across Texas, getting the timing right on this decision matters more now than it did a few years ago.
This blog covers the full picture: what a cost segregation study costs, when the math works, what the bonus depreciation changes mean for 2025 and 2026, and what happens at the back end when you sell.
What You’ll Learn
• What a cost segregation study costs to commission and at what asset value it typically pencils out
• How current bonus depreciation rules affect the value of a cost segregation study
• Why accelerated depreciation defers taxes rather than eliminating them, and what that means when you sell
• How depreciation recapture interacts with a 1031 exchange strategy for operators with active deal pipelines
• The specific scenarios where cost seg makes sense for a growth-stage commercial real estate operator, and the ones where it does not
Table of Contents
1. What a Cost Segregation Study Is (and What It Is Not)
2. How Much Does a Cost Segregation Study Actually Cost?
3. When Does the Math Actually Work for Real Estate Operators?
4. How Current Bonus Depreciation Rules Affect Cost Segregation
5. The Part Most Operators Don’t Think About: Depreciation Recapture at Sale
6. Questions Real Estate Operators Ask Before Pursuing Cost Segregation
What a Cost Segregation Study Is (and What It Is Not)
A cost segregation study is an engineering-based analysis that reclassifies components of a commercial or investment property from a standard 39-year or 27.5-year depreciation schedule to shorter 5, 7, or 15-year schedules. The IRS recognises that not every element of a building depreciates at the same rate. Carpeting, cabinetry, specialty electrical systems, and certain site improvements wear out faster than the structural shell. A qualified engineer identifies and separates those components, which allows you to front-load your depreciation deductions into earlier years rather than spreading them evenly over 39 years.
This is not a tax election. It is not something your CPA files on a form. A certified engineer has to physically inspect or review the property and produce a detailed component-by-component report. That report then becomes the foundation for the depreciation schedule your tax advisor uses when preparing your returns.
That distinction matters for two reasons:
• The study has a real cost (covered below), which means there is a breakeven threshold before it makes financial sense
• The study has to meet IRS standards to hold up in an audit; a poorly documented study or one prepared without proper engineering credentials creates exposure
One more thing worth saying clearly: cost segregation for real estate investors is a deferral strategy, not a permanent savings strategy. You are pulling depreciation deductions forward in time. The IRS will eventually want recapture on those deductions when you sell. That back-end consequence is the part most operators underestimate when they hear about cost seg for the first time. We will cover it in detail below.
For Austin commercial real estate operators building their real estate tax planning strategy around a multi-entity structure, cost seg is one of several levers worth evaluating alongside depreciation recapture exposure, capital gains timing, and entity-level tax efficiency.
How Much Does a Cost Segregation Study Actually Cost?
This is almost always the first question, and the answer is more specific than most content on this topic will give you.
Study fee ranges by property type:
| Property Type | Typical Study Fee Range |
| Residential rental (single asset) | $3,000 to $8,000 |
| Small commercial ($1M to $5M) | $5,000 to $10,000 |
| Mid-size commercial ($5M to $20M) | $8,000 to $15,000 |
| Large or complex commercial ($20M+) | $12,000 to $20,000+ |
What drives cost variation within those ranges:
• Property complexity (number of components, specialty systems, tenant improvements)
• Square footage and number of buildings or units
• Quality of existing construction documentation
• Whether the property requires a physical site visit or can be completed from plans and records
The breakeven question
For most commercial properties, the study fee becomes economically justified somewhere above $1 million in asset value. That said, the real breakeven depends on two variables your CPA needs to model for your specific situation:
1. Your effective federal tax rate: The higher your marginal rate, the more each dollar of accelerated depreciation is worth in cash savings
2. How much of the property can be reclassified: A concrete shell with minimal interior finish reclassifies less than a fully built-out office or retail space
A rough industry rule of thumb is that a well-executed study typically reclassifies 20% to 40% of a commercial building’s value into shorter-life components. On a $3 million property at a 35% effective rate, reclassifying $600,000 to $900,000 of cost into 5 or 15-year property produces a meaningful first-year deduction that exceeds the study fee many times over. The actual number depends on the property and your position.
The cost seg study benefits depend on who is doing the modelling before you commission the study. A specialist who runs the scenario for your asset before you spend on the engineering is giving you advisory value. A CPA who raises cost seg generically and sends you to an engineer without that analysis is not.
When Does the Math Actually Work for Real Estate Operators?
Not every asset and not every owner. Here are the conditions where cost segregation tends to produce a clear economic benefit:
Cost seg generally makes sense when:
• The property is valued above $1 million (commercial) or $750,000 (residential investment)
• You plan to hold the asset for at least five years
• Your effective tax rate is high enough that accelerated deductions produce material cash savings
• You are not in a passive loss carryforward position that would delay when you can actually use the deductions
• You have not already maxed out accelerated deductions through other means on that asset
Cost seg generally does not make sense when:
• The holding period is under three years (recapture exposure outweighs the deferral benefit)
• You are already in a significant passive loss carryforward position and cannot currently use additional deductions
• The asset is below the threshold where study fees are proportionate to the benefit
• You are planning a sale in the near term without a 1031 exchange in place
How We Helped a Commercial Real Estate Client Improve First-Year Cash Flow
A recent commercial real estate client approached P4 Tax after acquiring a mixed-use commercial property in the Austin area for approximately $4 million. After reviewing the client’s tax position and long-term investment strategy, we recommended a cost segregation study. The study identified approximately $1.1 million of the property’s cost that could be reclassified into shorter-life assets, resulting in a significant first-year depreciation benefit that substantially exceeded the cost of the study.
How Current Bonus Depreciation Rules Affect Cost Segregation
Bonus depreciation and cost segregation have always worked well together. Cost seg reclassifies components into shorter depreciation lives. Bonus depreciation then allows you to deduct a percentage of those reclassified components immediately in the year of acquisition rather than spreading them over 5, 7, or 15 years.
When bonus depreciation was at 100% from 2017 through 2022, an operator who commissioned a cost segregation study on a qualifying acquisition could deduct the full reclassified amount in year one. That created a first-year cash benefit that made the strategy particularly attractive and widely discussed.
The phase-down schedule under current law:
| Tax Year | Bonus Depreciation Rate |
| 2022 | 100% |
| 2023 | 80% |
| 2024 | 60% |
| Property acquired before January 20, 2025 | 40% |
| Property acquired after January 19, 2025 | 100% (under current law) |
What this means for the cost-benefit calculation
The economics of cost segregation changed significantly following the restoration of 100% bonus depreciation for qualifying property acquired after January 19, 2025. For qualifying assets, operators may again deduct 100% of eligible short-life components in the first year, substantially increasing the immediate cash-flow benefit compared to the temporary phase-down that had previously been scheduled. Standard depreciation rules continue to apply to any components that do not qualify for bonus depreciation.
With 100% bonus depreciation now restored for qualifying property acquired after January 19, 2025, cost segregation once again offers its strongest first-year acceleration benefit for eligible assets. While future legislation could always change the rules, current law provides a significantly more favorable environment than many operators expected under the previous phase-down schedule.
This is also where the distinction between bonus depreciation and standard cost segregation mechanics matters. Some operators still believe bonus depreciation has disappeared because they are familiar with the previous phase-down schedule. Under current law, qualifying property acquired after January 19, 2025, is once again eligible for 100% bonus depreciation, making cost segregation a particularly valuable planning strategy for many commercial real estate operators
The Part Most Operators Don’t Think About: Depreciation Recapture at Sale
This section is the one that often gets left out of the general content on cost segregation. It should not be.
When you sell a property on which you have taken accelerated depreciation, including through a cost segregation study, the IRS will tax that depreciation back at the time of sale. This is called depreciation recapture.
How recapture works on a cost-segregated property:
• Personal property components (5 and 7-year property) reclassified through cost seg are subject to Section 1245 recapture, taxed as ordinary income up to the amount of depreciation taken
• Real property components (15-year and structural) are subject to Section 1250 recapture, with unrecaptured Section 1250 gain taxed at up to 25%
• Both types of recapture are assessed on sale in addition to any capital gains tax on appreciation
A cost segregation study does not eliminate depreciation taxes; it accelerates them into earlier years and defers the recapture liability to the year of sale, which means the strategy only makes full economic sense when the holding period and exit plan are factored into the decision upfront.
This is why the holding period question is central to the analysis. If you accelerate $500,000 in depreciation deductions in year one and then sell the property two years later, you have benefited from the time value of those deductions but you are now facing recapture on the full amount at sale. For a short hold, the math gets complicated quickly.
How a 1031 exchange changes the recapture picture
A properly executed 1031 exchange defers both the capital gains tax on appreciation and the depreciation recapture liability. If you sell a cost-segregated property through a 1031 exchange and acquire a qualifying replacement property, the recapture does not trigger at the time of sale. It carries forward into the replacement property’s basis.
This is one of the more valuable planning conversations to have before a cost-segregated property goes on the market. The interaction between cost seg, capital gains strategy, and 1031 exchange timing is exactly the kind of integrated planning that most generalist CPA relationships do not provide. Understanding how depreciation recapture is calculated and taxed before you sell is not optional at this portfolio scale. It is the difference between a planned outcome and a surprise bill.
For operators managing multi-entity structures in Austin and Texas, with deals moving and dispositions on the horizon, this planning conversation needs to happen before the listing goes live, not after the wire clears.
Look-Back Studies: What Operators With Existing Assets Should Know
If you have owned a commercial property for several years and have never commissioned a cost segregation study, you have not necessarily missed the window.
A look-back study allows you to capture unclaimed accelerated depreciation on a property you already own without amending prior returns. The IRS allows this adjustment through a Form 3115, which is a change in accounting method. You file it with your current year return and catch up on all the depreciation you would have claimed had you done the study in the year of acquisition.
This is a significant planning tool for operators who:
• Acquired properties during the higher bonus depreciation years (2018 to 2022) and never commissioned a study
• Were not aware of the strategy when they acquired the asset
• Have held properties for several years and have not yet optimised the depreciation schedule
The same caveats apply: the strategy still needs to pencil out against the study fee, your passive loss position matters, and the recapture exposure at sale is still relevant. But the look-back option means the conversation is worth having even for properties already in your portfolio.
Get a Second Set of Eyes on Your Depreciation Strategy
Not sure whether your current returns reflect the right depreciation approach? Chris offers a free review of your business tax return or K-1.
Claim your free tax return review and find out whether your current strategy is leaving anything on the table.
Key Takeaways
• Cost segregation studies are engineering-based analyses, not tax elections. A qualified engineer must prepare the study for it to hold up under IRS scrutiny.
• For most commercial properties, the study cost becomes proportionate to the benefit above approximately $1 million in asset value, though effective tax rate and passive loss position determine the actual breakeven.
• For qualifying property acquired after January 19, 2025, 100% bonus depreciation has been restored under current law, significantly increasing the immediate tax benefit that can be achieved through a properly executed cost segregation study.
• Depreciation recapture is real. Every dollar of accelerated depreciation claimed through cost seg will be recaptured at sale, taxed at up to 25% on unrecaptured Section 1250 gain. A 1031 exchange can defer both the gain and the recapture if executed correctly.
• Look-back studies let you capture unclaimed accelerated depreciation on properties you already own through a Form 3115 change in accounting method.
• The decision to pursue cost segregation should factor in your holding period, exit plan, and passive loss position. It should not be made in isolation from your broader real estate tax planning strategy.
Is Cost Seg Right for Your Portfolio?
If you have a commercial acquisition coming up, or properties in your existing portfolio where this strategy has never been modelled, the place to start is a conversation about whether the numbers work for your specific assets and tax position.
At P4 Tax, cost segregation planning is part of a broader real estate tax strategy, not a standalone transaction. The question is not just whether cost seg works in general. It is whether it works for your assets, your exit timeline, and your entity structure.
Book a discovery call with Chris to work through the numbers on a specific property or your existing portfolio.
FAQs
How much does a cost segregation study cost?
Fees typically range from $5,000 to $15,000 for commercial properties, depending on property size and complexity. Residential rental studies generally run $3,000 to $8,000. The study fee needs to be weighed against the expected depreciation benefit, which depends on the property value, the owner’s effective tax rate, and how much of the property can be reclassified to shorter depreciation schedules. A specialist should model this before you spend on the engineering.
Is cost segregation worth it for a commercial real estate investor?
It depends on the asset value, the holding period, and the owner’s tax position. For most commercial real estate operators, a cost segregation study becomes economically justified when the property value exceeds approximately $1 million, though the actual breakeven depends on the owner’s effective tax rate and passive loss position. Operators with significant passive loss carryforwards may see a reduced immediate benefit, and anyone with a near-term sale planned should weigh the recapture exposure before proceeding.
What happens to depreciation recapture when you sell a cost-segregated property?
When a cost-segregated property is sold, all the depreciation that was accelerated through the study is subject to recapture. Personal property recapture is taxed as ordinary income under Section 1245. Unrecaptured Section 1250 gain is taxed at up to 25%. A 1031 exchange can defer both the capital gains tax and the recapture, but only if the exchange is structured and executed correctly, with the identification and replacement deadlines met.
Does bonus depreciation affect cost segregation?
Yes, significantly. Bonus depreciation is one of the primary reasons cost segregation can generate substantial first-year tax deductions. A cost segregation study identifies building components that qualify for shorter depreciation lives, and for qualifying property acquired after January 19, 2025, many of those eligible assets may qualify for 100% bonus depreciation under current law. This can significantly increase first-year depreciation deductions compared to standard straight-line depreciation. However, whether a cost segregation study is worthwhile still depends on factors such as the property’s characteristics, the owner’s tax position, holding period, and long-term investment strategy.
Can I do a cost segregation study on a property I already own?
Yes. A look-back study allows operators to capture unclaimed accelerated depreciation on properties already held without amending prior returns. The IRS allows this through a Form 3115 change in accounting method, which means you can catch up on missed depreciation in the current tax year. The economics still need to work against the study fee, and your tax advisor should model the benefit before commissioning the engineering.
Who prepares a cost segregation study?
A cost segregation study must be prepared by a qualified engineer, not a CPA or tax preparer. The engineering firm inspects the property and produces a detailed component-by-component analysis supporting the reclassification. The tax advisor then uses the study to prepare the correct depreciation schedule. The study must meet IRS documentation standards to hold up under audit. Using an unqualified preparer or an inadequately documented study creates real compliance risk.
Chris Pantoja is a licensed CPA with over 20 years of experience in real estate and tech taxation, based in Austin, Texas. P4 Tax and Consulting, LLC is a boutique tax strategy firm. P4 Tax and Consulting, LLC is not a registered CPA firm and does not provide audit, assurance, payroll, or bookkeeping services. This article is for informational purposes only and does not constitute tax, legal, or financial advice. Individual circumstances vary. Consult a qualified tax professional before making any decisions based on this material.