Who Is Eligible for Cost Segregation?

Most cost segregation marketing leads with "any property can qualify." That's almost true and not useful. The real question investors ask — will it pencil for me? — has two separate answers: legal eligibility and economic viability. The first is broad. The second is narrower and more interesting.

The rest of this article walks through each part: the legal test, which property types qualify (and which don't), ownership structures, the lookback option for properties you've owned for years, and the four-factor economic filter that tells you whether a study is actually worth ordering.

The Legal Eligibility Test

Two statutes drive legal eligibility:

• IRC Section 168 — The Modified Accelerated Cost Recovery System (MACRS), which establishes the depreciation framework for property placed in service after 1986.
• Revenue Procedure 87-56 — The IRS's classification guide assigning specific asset classes and recovery periods (5-year, 7-year, 15-year, 27.5-year residential, 39-year non-residential).

Under these, a cost segregation study is available for any property that meets two tests:

1. The property is income-producing — it generates or is held for the production of rental or business income, not held for personal use.
2. The property is depreciable under modern MACRS — generally, placed in service in 1986 or later, and of a type that's subject to the MACRS framework (the IRS Asset Classes from Rev. Proc. 87-56).

That's it for the legal test. No minimum value. No specific ownership structure required. No "only new construction" rule. The IRS audit techniques guide is explicit: cost segregation applies to both new and existing properties, acquisitions and ground-up construction, and renovations and improvements.

Property Types That Qualify

The IRS asset class framework covers nearly every category of commercial and residential real estate. Here's a full list of the property types we run studies on, each linked to more detail on our analysis for that type.

Our cost segregation percentages guide covers what typical reclassification rates look like for each of these property types, with ranges based on real studies.

Property Types That Don't Qualify

Three categories fall outside cost segregation's scope.

Primary residences. If you live in the property as your personal home, it's not depreciable. Personal-use property is excluded from the MACRS system. The exception: if you convert your primary residence to a rental, the rental portion becomes eligible from the date of conversion forward. Similarly, a qualifying home office creates a business-use portion that can be separately analyzed.

Land. Land itself is never depreciable under IRC Section 167(a) because it has an indefinite useful life. Cost segregation applies to the improvements on the land (buildings, site work, landscaping) but not the raw land value. That's why land allocation matters so much — it directly reduces the depreciable basis. See our percentages guide for how land allocation changes the math.

Property held as inventory. If you're a real estate dealer — flipping houses, building to sell, operating as a developer whose business is turning over properties — the property is inventory, not a capital asset. Inventory isn't depreciable. Cost segregation doesn't apply. The IRS distinguishes "dealer property" from "investor property" based on intent, frequency of sales, and how you hold the asset. If you hold rentals long-term and occasionally sell one, you're an investor. If you build and sell consistently, you're a dealer.

Ownership Structures That Qualify

Almost every ownership structure works. Cost segregation isn't about who owns the property — it's about the depreciable nature of the property itself. The deductions flow through whatever entity owns the asset.

• Individual ownership — rental held personally, reported on Schedule E.
• Single-member LLC — treated as a disregarded entity, reports on Schedule E the same as individual ownership.
• Multi-member LLC / Partnership — files Form 1065, passes deductions through to partners via K-1s.
• S-Corporation — files Form 1120-S, passes deductions to shareholders via K-1s. Rare for rental real estate due to SE tax issues but possible.
• C-Corporation — claims depreciation directly against corporate taxable income. Uncommon for real estate but legally eligible.
• Trust — both revocable and irrevocable trusts holding rental property can claim depreciation per the trust's tax situation.

A note on partnerships and K-1s: if the underlying partnership orders a cost seg study, the passed-through depreciation appears on each partner's K-1. Individual partners still need to handle passive activity rules at their personal level — see our material participation guide for how those rules work.

Placed-in-Service Timing and Lookback Studies

The phrase "placed in service" shows up repeatedly because it determines when depreciation starts and which MACRS version applies. A property is placed in service when it's ready and available for its intended use — for rental, that's typically when it's listed and available to tenants, not necessarily when it's actually rented.

For cost segregation, you have three timing options:

Year of acquisition. The cleanest scenario. You buy the property, have a cost seg study completed before you file that year's return, and claim the accelerated depreciation from Day 1. No complications, no special forms beyond the ordinary depreciation schedules.

Later year, no retroactive catch-up. You've owned the property for a year or two without doing a study. You can start a cost seg analysis now and apply the reclassified depreciation going forward. The first year or two of missed accelerated depreciation is effectively gone, but future years benefit.

Lookback study via Form 3115. This is the powerful option. You've owned the property for multiple years without doing cost seg. A lookback study applies the analysis retroactively and computes the cumulative missed accelerated depreciation. That missed amount is claimed as a Section 481(a) adjustment in the year of change — a single-year deduction for all the previously missed depreciation — by filing IRS Form 3115 (Change in Accounting Method) with your tax return. No amended returns required. See our lookback study guide for the full walkthrough.

The Economic Eligibility Filter

Legal eligibility is broad. Economic viability is narrower. A study that costs $795 and produces $500 in tax savings is legal but dumb. Four factors determine whether the math works for your specific situation.

Factor 1: Depreciable Basis

The study's ROI is roughly proportional to the depreciable basis — purchase price minus land allocation. Below a $200,000 residential depreciable basis (or roughly a $250,000 purchase price with typical land allocation), the absolute dollar savings often don't justify the fee. Our minimum property value guide covers this threshold in detail, with the math for why $150K is usually the practical floor.

Factor 2: Federal Tax Bracket

Cost seg accelerates deductions; the value of those deductions is your marginal tax rate. At 37% (top bracket), a $100K paper loss saves $37K in federal tax. At 12%, that same $100K saves $12K. If your brackets are 22% or lower, the math often pencils only on larger properties or with state tax adding to the savings.

Factor 3: Loss Usability

This is the factor most investors skip. A large paper loss is only valuable if you can use it against current-year income. If your losses are classified as passive and you have no passive income, they suspend — the savings materialize later when you dispose of the property or otherwise release the suspended losses. See our full guide to material participation for the rules here. For STR owners, the W-2 offset path via the 7-day rule is often the unlock.

Factor 4: Hold Period

Cost seg creates deductions today and adds recapture exposure tomorrow. If you hold the property for 10+ years, time value compounds in your favor. If you plan to sell within 2–3 years, the recapture math starts to compress the benefit. Our sell-soon analysis covers when short-hold cost seg still pencils (usually: high current bracket trending down, plans to 1031, losses usable in the meantime).

Special Situations

A few scenarios come up often enough that they deserve direct treatment. Each has a dedicated post covering the specifics.

Inherited property. When you inherit real estate, your basis is "stepped up" to fair market value as of the date of death under IRC Section 1014. That gives you a clean, high basis for depreciation purposes. Cost seg on inherited property is almost always a strong fit — see our inherited property cost seg guide.

1031 exchange replacement property. Cost seg on a replacement property from a 1031 is fully available but with one wrinkle: the replacement property inherits the carryover basis plus any boot paid. Accelerated depreciation applies to the new boot (the extra basis added beyond the carryover), not the carryover basis itself. See our 1031 exchange cost seg guide for how to structure the analysis.

Converted primary residence. When you convert your former primary residence to a rental, the property becomes depreciable at the lesser of fair market value on the date of conversion or adjusted basis. That's when cost seg becomes available. Our converted primary residence guide walks through the basis computation.

House hacking duplex or triplex. If you live in one unit and rent the others, only the rental portion is eligible. Cost seg can be applied to that rental portion using square footage allocation. See our house hacking cost seg guide.

New construction. Ground-up construction is eligible but typically done differently than an acquisition study. Construction invoices provide actual cost data, so the study uses invoice-based allocation rather than RSMeans estimation. Usually produces strong results. See our new construction cost seg guide.

Decision Table: Am I Eligible?

A rough matrix for common scenarios. Green = study generally pencils; yellow = depends heavily on individual factors; red = usually skip.

If your situation lands in the yellow zone, it's worth running the specific numbers. The cost segregation calculator gives a quick model of accelerated depreciation and Year 1 tax savings; the real analysis factors in your hold period, participation status, and state tax treatment.

Frequently Asked Questions

Who can claim cost segregation?

Any taxpayer that owns depreciable income-producing real property placed in service under modern MACRS. That's broad — individuals, LLCs, partnerships, S-corps, C-corps, trusts. Economic viability is narrower and depends on basis, bracket, hold period, and loss usability.

Can you do cost segregation on a primary residence?

Not on a primary residence you live in. But if you convert it to a rental or use part of it for a qualifying home office, the rental or business-use portion becomes eligible.

Does the property have to be new construction?

No. Cost seg applies to acquisitions, new construction, and renovations. Any age of property placed in service after 1986 is eligible.

Can cost segregation be done on property I bought years ago?

Yes — via a lookback study using Form 3115. The cumulative missed depreciation is claimed as a Section 481(a) adjustment in a single year, without amending prior returns.

What's the minimum property value for cost segregation to make sense?

Economically, $200K depreciable basis is roughly the floor for residential and $300K for commercial — but this shifts based on your tax bracket. The fixed cost of the study has to produce enough tax savings to justify the fee, so higher brackets let smaller properties pencil.