Does cost segregation apply to short-term rental properties?

Yes, but do not assume the 27.5-year base it is usually described against. IRS Publication 527 defines residential rental property as a building for which 80% or more of gross rental income comes from dwelling units, and states it does not include a unit in a hotel, motel, inn, or other establishment where more than half of the units are used on a transient basis. A property let entirely on a transient basis can therefore fall outside that class and into nonresidential real property at 39 years. The reclassification of components to 5-year and 15-year lives works either way, but the qualification of the building itself is contested for high-turnover STRs and changes your base. Settle it with a licensed CPA before commissioning a study.

What is the bonus depreciation rate for STR property in 2025?

100% for qualified property acquired after January 19, 2025, per Section 70301 of the One Big Beautiful Bill Act (P.L. 119-21), which permanently reinstated full expensing. Personal property components reclassified through cost segregation can be fully deducted in the year of acquisition. Verify with a licensed CPA for your specific tax situation and holding structure.

What does a cost segregation study cost?

Study costs vary by provider, property size, and complexity. Residential and small commercial properties typically require a smaller study than large apartment buildings. Request quotes from at least three qualified providers and ask for a pre-study ROI estimate before committing. Verify current pricing directly with providers.

What is depreciation recapture on cost-segregated property?

When you sell a property where cost segregation was applied, the IRS recaptures the accelerated depreciation. Personal property (5-year and 7-year MACRS) faces Section 1245 recapture taxed as ordinary income. The common claim that real property is capped at 25% is wrong: Section 1250 contains no 25% rate, it treats depreciation taken above straight-line as ordinary income, at 100% for most depreciable realty. The 25% belongs to a different provision, the unrecaptured Section 1250 gain rate under Section 1(h), and covers only the straight-line slice. Because 15-year land improvements use 150% declining balance, the excess over straight-line plus any bonus depreciation on them is recaptured as ordinary income, not at 25%. Model this before committing, especially if you may sell within 10 years, and consult a CPA.

Can I use cost segregation if my rental activity is passive?

You can commission a study, but the accelerated depreciation losses may be suspended under passive activity rules unless you qualify under the short-term rental exception (average stay of 7 days or fewer, plus material participation) or as a real estate professional. See our STR tax deductions guide for how passive activity rules apply to rental property.

Short-Term Rental Cost Segregation and Bonus Depreciation

By Daniel Carrow (pen name) Published Aug 5, 2026 guide

Standard MACRS depreciation for a residential rental property runs 27.5 years. On a $600,000 property (excluding land), that comes to roughly $21,800 in annual depreciation. Cost segregation gets more of that deduction into the first year by separating the components that do not need to depreciate over 27.5 years.

In 2025, that strategy got significantly more valuable. The One Big Beautiful Bill Act (P.L. 119-21) permanently restored 100% bonus depreciation for qualified property acquired after January 19, 2025. Components reclassified to 5-year or 15-year MACRS lives through cost segregation now qualify for immediate first-year expensing, rather than a multi-year spread.

TL;DR: Cost segregation is an engineering study that reclassifies STR property components from 27.5-year residential depreciation to 5-year (personal property) or 15-year (land improvements) MACRS lives. With 100% bonus depreciation now permanent, those reclassified components are fully deductible in year one. The strategy works for operators who can actually use the deductions: those with material participation in their STRs, or real estate professional status. Recapture is real and must be modeled before you commit. This is informational content, not tax advice. Verify with a licensed CPA before acting.

Why Standard Depreciation Leaves Deductions on the Table

Per IRS Publication 946, residential rental property uses the Modified Accelerated Cost Recovery System (MACRS) with a 27.5-year General Depreciation System (GDS) recovery period. That applies to the building structure itself.

Not every component of a property is structural. The carpet in a bedroom, the dishwasher, the outdoor paving, and the landscaping all have shorter useful lives and qualify for different MACRS treatment under Rev. Proc. 87-56 (as amended) and the asset class tables in Publication 946 Appendix B.

Without cost segregation, those components get lumped into the 27.5-year building basis. With cost segregation, an engineering study separates them, and the separated basis depreciates on a faster schedule.

The practical result: more depreciation deductions concentrated in the first few years, reducing taxable income from rental activity sooner rather than spreading it over nearly three decades.

The MACRS Classes That Matter for STR Properties

Three recovery periods apply to most STR property components:

27.5-year residential rental property (GDS): The building structure itself, including walls, roof, windows, HVAC systems, and plumbing. This is the default for anything not separately classified.

The 27.5-year period is conditional, and short-term rental operators are exactly the population where the condition bites. IRS Publication 527 defines the residential rental property class as “any real property that is a rental building or structure (including a mobile home) for which 80% or more of the gross rental income for the tax year is from dwelling units,” and states that it “doesn’t include a unit in a hotel, motel, inn, or other establishment where more than half of the units are used on a transient basis” (retrieved August 2026). A property let entirely on a transient basis can therefore fall outside the class, which would put it in nonresidential real property at 39 years rather than 27.5. That qualification is genuinely contested rather than settled, and it changes the depreciation base you are about to accelerate. Settle it with a CPA before you commission a study, not after.

5-year personal property: Appliances (refrigerators, dishwashers, washers and dryers), carpets and flooring not permanently attached, furniture, window treatments, and certain fixtures. Per IRS Publication 527 and MACRS Asset Class 57.0 in Rev. Proc. 87-56, these qualify for 5-year recovery under GDS for residential rental property.

15-year land improvements: Sidewalks, driveways, fencing, outdoor lighting, landscaping, swimming pools, and parking areas. These fall under MACRS Asset Class 00.3 in Rev. Proc. 87-56 and Appendix B of IRS Publication 946.

Cost segregation targets the 5-year and 15-year classes. The engineering study produces a report documenting each reclassified component with a defensible cost basis, unit costs, and the MACRS class it qualifies for.

Bonus Depreciation: Phase-Down and Reinstatement

The bonus depreciation rate determines how much of a reclassified component’s basis you can deduct in year one versus spreading over the recovery period.

Under the Tax Cuts and Jobs Act, bonus depreciation was scheduled to phase down from 100% in annual steps:

xychart-beta
  title "Bonus Depreciation Rate by Tax Year"
  x-axis ["2022", "2023", "2024", "Pre-Jan 19 2025", "Post-Jan 19 2025", "2026+"]
  y-axis "First-Year Deduction %" 0 --> 100
  bar [100, 80, 60, 40, 100, 100]

Source: IRS Publication 946 (phase-down rates 2022-2024); One Big Beautiful Bill Act, Section 70301, P.L. 119-21 (2025 reinstatement), accessed August 2026.

The One Big Beautiful Bill Act (P.L. 119-21, Section 70301) permanently reinstated 100% bonus depreciation for qualified property acquired after January 19, 2025. The phase-down is reversed and full expensing is now permanent.

A concrete illustration of the mechanics (not a tax guarantee): if a cost segregation study allocates $150,000 of a property’s basis to 5-year personal property, that $150,000 is eligible for a 100% first-year deduction under bonus depreciation for property acquired after January 19, 2025. Without cost segregation, that same $150,000 would depreciate over 27.5 years at roughly $5,450 per year.

The difference in timing is the core value of the strategy.

The Passive Activity Constraint

Cost segregation produces deductions. Whether those deductions are usable depends on how your rental activity is classified.

Rental activities are passive by default under IRC §469 and IRS Publication 925. Passive losses can only offset passive income. If your MAGI exceeds $150,000, you cannot deduct rental losses against ordinary income under the standard passive activity rules, regardless of how large the depreciation deduction is.

Three paths exist around this constraint:

Short-term rental exception: Per IRS Publication 925, if the average period of customer use of your rental property is 7 days or fewer, the IRS does not treat the rental as a passive activity. Instead, the general material participation tests apply. If you materially participate, the activity is non-passive and losses can offset ordinary income. For operators running STRs with standard nightly or weekly bookings and active hands-on management, this is the most accessible path. The material participation tests are exacting and must be documented. Verify your specific situation with a CPA.

Real estate professional status: More than 750 hours per year in real property trades or businesses where you materially participate, with real estate representing more than 50% of your total personal service hours. This removes the passive activity limitation entirely. Most W-2 employees cannot qualify. Covered in our STR tax deductions guide.

Passive income offset: If you have passive income from other sources (other rental properties, certain partnership interests), cost segregation losses can offset that income regardless of your employment status.

Cost segregation on a property you cannot use the losses from is not worthless. The losses carry forward to future years and can offset gain when you sell. But the timing value disappears. Run the scenario with your CPA before commissioning a study.

Depreciation Recapture: The Risk Operators Underestimate

Cost segregation is a timing strategy, not a tax elimination strategy. The IRS will recapture the accelerated depreciation when you sell.

Per IRC §1245, gain on the sale of personal property (5-year, 7-year MACRS components) up to the amount of depreciation taken is recaptured and taxed as ordinary income. On 5-year property with 100% bonus depreciation taken in year one, that is the full reclassified basis, taxed at ordinary income rates in the year of sale.

Real property is where the common shorthand goes wrong, and it goes wrong in the direction that flatters the strategy. IRC §1250 contains no 25% rate at all. What it does is treat the applicable percentage of “additional depreciation,” meaning depreciation taken in excess of straight-line, as ordinary income, and for most depreciable realty that applicable percentage is 100% (retrieved August 2026). The 25% figure belongs to a different provision: it is the rate on unrecaptured section 1250 gain under IRC §1(h), and it applies only to the straight-line slice that §1250 has not already pulled into ordinary income.

That distinction decides real money on 15-year land improvements. They are depreciated on a 150% declining balance method, so everything above straight-line, plus any bonus depreciation taken on them, is additional depreciation recaptured as ordinary income rather than capped at 25%. Part of that asset class can also fall under §1245 and be recaptured in full. Treat 25% as the ceiling on your recapture bill and you will under-reserve at sale, which is precisely the risk this section exists to flag.

The practical implication: if you plan to sell the property within a few years, recapture will partially or fully offset the earlier tax benefit, depending on your tax rate in the year of sale. If you hold long-term or execute a 1031 exchange into another qualifying property, the recapture defers or never materializes in cash terms.

Model both scenarios before you commit. A CPA can run the after-tax math for a typical hold period versus an early exit, factoring in your marginal rate at sale versus the rate when you claimed the deductions.

When a Cost Segregation Study Pays for Itself

The study is worth commissioning when three conditions align:

The reclassified basis is material relative to the study cost. Request a pre-study estimate from a qualified provider or your CPA to see the projected first-year tax benefit. This estimate is typically low-cost or free. If the projected tax savings do not meaningfully exceed the study fee, reconsider.

You can actually use the deductions. If passive activity rules will suspend the losses, the timing benefit is gone. Run the passive activity analysis first.

Your holding plan supports it. Short expected holds (under 3-5 years) risk triggering recapture that offsets the benefit. Longer holds, or properties you intend to 1031 exchange, let the timing advantage play out.

Lookback studies for existing properties: Cost segregation can be applied retroactively to property you already own, using IRS Form 3115 (Application for Change in Accounting Method) to catch up on missed depreciation in a single year. The rules for lookback studies differ from forward studies on new acquisitions. Confirm the process with a CPA before engaging a provider.

For operators scaling their portfolios, the cash-flow modeling in our STR cash-on-cash return guide provides context for how accelerated depreciation fits into the overall investment return picture.

How to Vet a Cost Segregation Provider

The quality of the engineering study determines whether it survives an IRS audit. A thin study is a liability, not an asset.

Engineering credentials: The preparer should be a licensed engineer or a CPA with documented cost segregation experience. Tax preparation experience alone is not sufficient. Ask for their methodology and request a sample report from a comparable property.

ASCSP membership: The American Society of Cost Segregation Professionals sets methodology standards. Membership is not required but indicates familiarity with current IRS practice.

Pre-study estimate: Any credible provider will offer a no-cost or low-cost estimate of the projected tax benefit before you pay for the full study. Decline providers who refuse this step.

Audit support: The provider should stand behind their work if the IRS challenges the component allocations. Ask explicitly what audit support is included and whether it covers representation.

CPA review of the completed study: Have your tax CPA review the study before it is filed. The cost segregation firm identifies and values the components. Your CPA integrates the results into your return and models the full tax impact, including recapture scenarios.

Avoid firms that quote unusually high reclassification percentages without a site inspection, or that charge fees based on a percentage of tax savings rather than a flat or project-based rate. Fee structures tied to savings can incentivize aggressive allocations.

Common Pitfalls at 5-30 STR Doors

Lease-only operators: Cost segregation applies to property you own. Rental arbitrage operators managing leased properties have no depreciable ownership interest and cannot benefit from a cost segregation study.

Skipping the passive activity analysis first: Ordering a study before confirming you can use the losses is the most common and most expensive mistake. Run the passive activity analysis with your CPA before engaging a cost segregation firm.

Ignoring recapture in exit scenarios: Operators who apply cost segregation and sell within 3-5 years often face a tax bill that surprises them. The recapture on 5-year property comes as ordinary income. Model the exit math in advance.

Entity structure complications: If your STRs are held in an S-Corporation, the passive activity and material participation analysis differs from a standard partnership or individual ownership structure. The 7-day average stay exception may not apply identically. Verify the entity-specific implications with a CPA before starting.

Confusing lookback and forward studies: A lookback study on existing property uses Form 3115 and has specific timing and accounting method change rules. A forward study on a new acquisition is a simpler process. Understand which situation applies before engaging a provider, as the cost and complexity differ.

Next Steps

Cost segregation makes operational sense for STR operators who: own their properties outright (not arbitrage), have material participation or real estate professional status, have meaningful tax liability to offset, and intend to hold properties long enough that recapture is not a near-term concern.

The first step is not commissioning a study. It is a conversation with a CPA who understands both MACRS depreciation rules and STR-specific passive activity treatment. That conversation will tell you whether cost segregation applies to your situation before you spend money on an engineering report.

For the underlying depreciation and Schedule E framework, see our STR tax deductions guide. For the capital structure decisions that determine what you own and how, see our DSCR financing guide for STR portfolio acquisition. For the operational scaling decisions that often trigger larger property acquisitions, see the 10-to-30 doors scaling guide.

Disclaimer: This article is informational only and does not constitute tax, legal, or financial advice. Cost segregation, bonus depreciation, and passive activity rules interact differently depending on entity structure, participation hours, income levels, property basis, and holding period. Tax law is facts-specific. Consult a licensed CPA or tax attorney before implementing any strategy described here. Information reflects IRS guidance current as of August 2026. Regulations and IRS administrative guidance change. Verify all claims with current IRS publications and a qualified tax professional before acting.

Sources: IRS Publication 946 (How To Depreciate Property); IRS Publication 527 (Residential Rental Property); IRS Publication 925 (Passive Activity and At-Risk Rules); IRS guidance on the One Big Beautiful Bill Act, Section 70301; IRC §469; IRC §1245; IRC §1250. All accessed August 2026.

Frequently asked questions

Does cost segregation apply to short-term rental properties?: Yes, but do not assume the 27.5-year base it is usually described against. IRS Publication 527 defines residential rental property as a building for which 80% or more of gross rental income comes from dwelling units, and states it does not include a unit in a hotel, motel, inn, or other establishment where more than half of the units are used on a transient basis. A property let entirely on a transient basis can therefore fall outside that class and into nonresidential real property at 39 years. The reclassification of components to 5-year and 15-year lives works either way, but the qualification of the building itself is contested for high-turnover STRs and changes your base. Settle it with a licensed CPA before commissioning a study.
What is the bonus depreciation rate for STR property in 2025?: 100% for qualified property acquired after January 19, 2025, per Section 70301 of the One Big Beautiful Bill Act (P.L. 119-21), which permanently reinstated full expensing. Personal property components reclassified through cost segregation can be fully deducted in the year of acquisition. Verify with a licensed CPA for your specific tax situation and holding structure.
What does a cost segregation study cost?: Study costs vary by provider, property size, and complexity. Residential and small commercial properties typically require a smaller study than large apartment buildings. Request quotes from at least three qualified providers and ask for a pre-study ROI estimate before committing. Verify current pricing directly with providers.
What is depreciation recapture on cost-segregated property?: When you sell a property where cost segregation was applied, the IRS recaptures the accelerated depreciation. Personal property (5-year and 7-year MACRS) faces Section 1245 recapture taxed as ordinary income. The common claim that real property is capped at 25% is wrong: Section 1250 contains no 25% rate, it treats depreciation taken above straight-line as ordinary income, at 100% for most depreciable realty. The 25% belongs to a different provision, the unrecaptured Section 1250 gain rate under Section 1(h), and covers only the straight-line slice. Because 15-year land improvements use 150% declining balance, the excess over straight-line plus any bonus depreciation on them is recaptured as ordinary income, not at 25%. Model this before committing, especially if you may sell within 10 years, and consult a CPA.
Can I use cost segregation if my rental activity is passive?: You can commission a study, but the accelerated depreciation losses may be suspended under passive activity rules unless you qualify under the short-term rental exception (average stay of 7 days or fewer, plus material participation) or as a real estate professional. See our STR tax deductions guide for how passive activity rules apply to rental property.