Key Findings
- 20–40% of depreciable basis is typically reclassified to shorter MACRS recovery periods (5, 7, or 15 years)
- This translates to roughly 10–25% of the total purchase price accelerated into Year 1
- STRs and high-amenity properties consistently produce the highest reclassification rates
- Based on engineering-based studies using RSMeans cost data and IRS-recognized classification methods under Rev. Proc. 87-56
Cost segregation marketing is full of vague promises. "Save tens of thousands." "Accelerate 40%+ of your depreciation." These numbers are rarely sourced, rarely contextualized, and almost never broken out by property type.
This page is different. Below are benchmark ranges derived from engineering-based cost segregation studies—not estimates, not projections, and not cherry-picked outliers. These ranges reflect what a typical property in each category actually produces when analyzed at the component level using RSMeans construction cost data and classified per the IRS Cost Segregation Audit Techniques Guide.
Two metrics matter here. % of depreciable basis reclassified tells you what portion of the building (after subtracting land) gets moved from the default 27.5-year or 39-year schedule into 5, 7, or 15-year recovery periods. % of purchase price tells you the effective acceleration as a share of what you actually paid—a more intuitive number for calculating real tax savings. The gap between them is land allocation.
Residential Benchmarks
Residential properties default to a 27.5-year recovery period under MACRS. Cost segregation reclassifies qualifying components into 5-year personal property (cabinetry, appliances, carpet, fixtures), 7-year property (certain equipment), and 15-year land improvements (driveways, landscaping, fencing, pools). With 100% bonus depreciation restored permanently under the One Big Beautiful Bill Act, all reclassified components can be deducted in full in Year 1.
| Property Type | % of Basis Reclassified | % of Purchase Price | Key Drivers |
|---|---|---|---|
| Single Family Rental | 17–18% | 14–15% | Interior finishes, landscaping, property age |
| STR / Airbnb | 30–34% | 24–27% | FF&E, furnishings, outdoor amenities |
| Duplex / Triplex / Fourplex | 18–19% | 14–15% | Per-unit finishes, shared building systems |
| Condo / Townhome | 14–16% | 11–13% | Limited scope (no roof, foundation, exterior) |
| Multifamily (5+ units) | 17–19% | 14–15% | Scale effects, shared systems, site work |
The SFR and small multifamily ranges cluster around 17–19% of basis. This isn't a coincidence. These properties share a similar building envelope—wood-frame construction, standard MEP systems, typical landscaping—and the components that qualify for acceleration are largely the same: flooring, cabinetry, appliances, light fixtures, and site improvements.
STRs stand out because they contain a category of property that unfurnished rentals don't: furniture, fixtures, and equipment. A fully furnished Airbnb has beds, dressers, sofas, dining tables, TVs, linens, kitchenware, and often outdoor amenities like hot tubs, fire pits, and game room equipment. All of this is 5-year or 7-year property under IRC §168. That's why STR reclassification rates run 12–16 percentage points higher than unfurnished SFRs.
Condos are at the bottom because of scope, not study quality. A condo owner doesn't own the roof, foundation, exterior walls, parking structure, or common-area landscaping. The depreciable scope is essentially the interior: finishes, fixtures, appliances, and the unit's share of building systems. Less building to segregate means a lower percentage. For more on what percentages to expect and why, see our detailed breakdown.
Commercial Benchmarks
Commercial properties default to a 39-year recovery period—nearly 12 years longer than residential. That longer default timeline means cost segregation has proportionally more impact: each reclassified dollar is moving a greater distance on the depreciation schedule.
Commercial benchmarks vary more widely than residential because the building systems themselves vary more. An office building and a restaurant are fundamentally different structures with different cost profiles.
Tenant improvements, specialty electrical and data/telecom infrastructure, raised flooring, and MEP systems serving individual tenant spaces. Higher-end Class A offices with significant buildout skew toward the top of the range.
Specialty plumbing (medical gas lines, vacuum systems), clean room finishes, lead-lined walls for imaging suites, exam room cabinetry, and dedicated HVAC zoning. Medical offices consistently produce higher reclassification rates than general office because the specialized fit-out creates more short-life personal property.
Storefront systems, display lighting, specialty flooring, tenant partition walls, and signage infrastructure. Retail spaces with extensive tenant buildout (restaurants in retail shells, high-end showrooms) push toward the upper boundary.
Commercial kitchen equipment, walk-in coolers and freezers, grease traps, exhaust hood systems, bar buildout, specialty plumbing, and dedicated electrical circuits. Restaurants are among the highest-reclassification commercial property types because so much of the building cost is in equipment and specialized finishes rather than structural shell.
Dock equipment and levelers, heavy electrical distribution, crane systems, specialized flooring (sealed concrete, epoxy), and significant site work (truck courts, loading areas, perimeter fencing). Industrial properties derive a larger share of their reclassification from 15-year site improvements than other commercial types.
What Drives Variation Within These Ranges
The ranges above are wide for a reason. A 17% SFR and an 18% SFR are both normal outcomes, and the difference comes down to specific property characteristics, not study quality. Understanding what drives variation helps set realistic expectations before ordering a study.
Age and condition matter more than most investors realize. Older properties tend to produce higher reclassification rates because they have more component differentiation. A 1985 home has had carpeting replaced, fixtures updated, landscaping mature, and systems upgraded over four decades. Each of those interventions creates identifiable short-life property. A 2023 new-build has original everything—less differentiation, fewer separately identifiable components, and typically a lower reclassification rate. This isn't a flaw in the methodology. The IRS classification rules are based on component useful life, and newer components simply have longer remaining useful lives.
Furnishing level is the single biggest variable for residential properties. The gap between an unfurnished SFR at 17% and a fully furnished STR at 34% is almost entirely explained by FF&E. Furniture, appliances, linens, entertainment systems, outdoor furniture, and hot tubs are all 5-year or 7-year property. A mountain cabin with four furnished bedrooms, a game room, and an outdoor entertainment area can have $50,000–$100,000 in personal property that an unfurnished rental simply doesn't have. Material participation rules under IRS Publication 925 may allow STR owners to use these accelerated deductions to offset W-2 income—a significant advantage discussed in detail on our STR cost segregation page.
Site improvements are often the forgotten category. Landscaping, fencing, driveways, patios, retaining walls, swimming pools, and exterior lighting all qualify as 15-year land improvements under IRC §168(e). For properties with extensive outdoor features—a Smoky Mountain cabin with a wraparound deck and fire pit, a Florida rental with a pool and paver patio—15-year property can account for 8–12% of the depreciable basis on its own. Some properties have more value in their 15-year bucket than their 5-year bucket, though this rarely makes the marketing brochure.
Construction quality affects 5-year and 7-year allocation directly. Custom cabinetry, specialty tile, built-in shelving, designer light fixtures, and high-end appliances all cost more per unit than builder-grade equivalents, and they're all short-life property. A $1.2M custom home with a chef's kitchen and imported tile has more accelerated depreciation in absolute dollars than a $500K tract home—not just because the basis is larger, but because a higher proportion of the construction cost is in short-life components. For more context, see when cost segregation does and doesn't make sense.
Geography doesn't change the percentage but changes the dollar amounts. Construction cost indices (based on BLS Producer Price Index data) adjust component costs by metro area. Building in San Francisco costs more per square foot than building in Memphis. The same 18% reclassification rate produces a larger absolute deduction on a higher-cost-basis property.
What These Numbers Mean for Tax Savings
Benchmarks are useful, but investors care about dollars. Here's a worked example using a $750,000 short-term rental—a common property profile in markets like the Smoky Mountains, Gulf Coast, or Arizona.
$750K Furnished Airbnb — 34% Reclassification Rate
That's a 94:1 return on the study cost. Even at the low end of the STR range (24% of purchase price), the Year 1 deduction would be $144,000, producing roughly $53,000 in federal tax savings. The economics of cost segregation don't depend on hitting the top of the benchmark range. They work across the entire band.
For a detailed component-level walkthrough of a similar property, see our $750K Airbnb example report or the $500K STR example.
To see your own property's estimated breakdown, run it through the calculator. It takes 60 seconds, requires no signup, and produces a property-specific estimate based on the same RSMeans-derived cost data used in our full studies.
Methodology
These benchmarks are derived from engineering-based cost segregation studies using RSMeans construction cost data, county assessor records, and satellite imagery. Each study follows the methodology outlined in the IRS Cost Segregation Audit Techniques Guide and classifies components according to Rev. Proc. 87-56 asset class guidelines. Construction costs are adjusted for geography using BLS Producer Price Index data, and land allocation uses a multi-source pipeline (county assessor data, statistical metro-level models, and property-specific adjustments).
Reclassification percentages reflect the portion of depreciable basis (purchase price minus land) moved from the default recovery period (27.5 years for residential, 39 years for commercial) into 5-year, 7-year, or 15-year MACRS classes. For a deeper explanation of how our cost segregation studies work, including what you receive and how the analysis is structured, see our overview page.
Frequently Asked Questions
Typically 20–40% of the depreciable basis can be reclassified from the default 27.5-year (residential) or 39-year (commercial) schedule into shorter recovery periods. The exact percentage depends on property type, age, furnishing level, and site improvements. Residential properties without furnishings typically fall in the 14–19% range. Furnished STRs and high-buildout commercial properties can reach 30–35%.
Short-term rentals contain significantly more personal property than unfurnished rentals. Furniture, appliances, linens, kitchenware, entertainment equipment, hot tubs, and outdoor amenities all classify as 5-year or 7-year property under MACRS. A fully furnished STR typically has 30–34% of its depreciable basis in accelerated categories, compared to 17–18% for an unfurnished single family rental. The building shell is the same; the difference is the contents.
No. These are benchmark ranges based on typical properties, not guarantees for any specific property. Every property is different. A 1960s SFR with a large lot, mature landscaping, and renovated finishes will produce a different result than a 2024 new-build condo with a small patio. A cost segregation study analyzes each property individually at the component level. The benchmarks tell you what's typical for your property type; the study tells you what's specific to your property.
Properties skew toward the high end when they are older (pre-2000), fully furnished, have significant site improvements (pools, extensive landscaping, long driveways, fencing), or feature custom finishes rather than builder-grade materials. Properties skew toward the low end when they are newer construction, unfurnished, have minimal outdoor improvements, or are condos with limited depreciable scope. The calculator can give you a property-specific estimate in 60 seconds.
Related Research
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Cost Segregation for Airbnb Properties: A Complete Guide
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