Cost Segregation Reclassification Percentages by Property Type

The first question almost every property owner asks about cost segregation is: "What percentage will I get?" It's the right question — the reclassification percentage drives the entire tax benefit. But the honest answer starts with a caveat: there is no official table of these percentages. The IRS has never published per-property-type reclassification rates. Every number you'll see below is an engineering estimate from published industry sources, and we've cited each one so you can check our work.

What "reclassification percentage" actually means

When you buy a rental property, the default tax treatment puts the whole building on a 27.5-year schedule (residential) or 39-year schedule (commercial). A cost segregation study identifies components that legally belong in shorter MACRS buckets instead:

5-year property (Section 1245 personal property): carpet and vinyl flooring, appliances, cabinetry, window treatments, decorative lighting, specialty electrical, restaurant and kitchen equipment, furniture and fixtures in furnished rentals.
7-year property (Section 1245): office furniture, certain fixtures and specialty equipment.
15-year property (land improvements): parking lots, sidewalks, landscaping and irrigation, fencing, retaining walls, site lighting, signage, patios and decks not structurally integrated into the building.
What stays put: structural components — foundation, framing, roof, load-bearing walls, core building systems — remain 27.5-year or 39-year property under Section 1250.

The "reclassification percentage" is the share of your depreciable basis (purchase price minus land value) that moves into the 5-, 7-, and 15-year buckets. It is not a share of the purchase price — the land allocation comes off first, and getting that allocation right matters enormously. With 100% bonus depreciation permanently restored for property placed in service after January 19, 2025, everything reclassified into those shorter buckets is generally deductible in Year 1. (See our 2026 bonus depreciation guide for the details.)

5-year, 7-year, and 15-year ranges by property type

The table below collects published component-level benchmarks. These come from two open cost-segregation methodology references; both present them explicitly as industry-estimate ranges, not IRS figures. Percentages are of depreciable basis.

Property type	5-yr % range	7-yr % range	15-yr % range	Source
Hotel	15–25%	3–8%	8–12%	CRE cost-seg benchmarks [1]
Multifamily	10–20%	2–4%	5–10%	CRE cost-seg benchmarks [1]
Office	10–18%	2–5%	5–12%	CRE cost-seg benchmarks [1]
Retail	10–18%	2–5%	8–15%	CRE cost-seg benchmarks [1]
Industrial	5–12%	1–3%	5–10%	CRE cost-seg benchmarks [1]
Medical	15–25%	3–6%	5–10%	CRE cost-seg benchmarks [1]
Hospitality	15–25%	5–8%	8–12%	Cost-seg methodology reference [2]
Multifamily (garden)	10–15%	2–4%	8–12%	Cost-seg methodology reference [2]
Multifamily (high-rise)	8–12%	2–3%	5–8%	Cost-seg methodology reference [2]
Office	8–12%	3–5%	5–10%	Cost-seg methodology reference [2]
Retail (strip)	8–15%	2–4%	10–15%	Cost-seg methodology reference [2]
Industrial / warehouse	5–8%	2–3%	12–18%	Cost-seg methodology reference [2]

A few patterns worth noticing. Hotels and medical facilities run the highest because they're packed with 5-year personal property — guest-room furnishings, medical equipment, specialty plumbing and electrical. Industrial and warehouse properties run the lowest on 5-year property but often carry the largest 15-year bucket, because so much of the value sits in site work: paving, loading areas, fencing, drainage. And across every property type, the 7-year bucket is the smallest — most personal property lands in 5-year, and 7-year is reserved for specific fixtures and equipment classes.

Total reclassified percentages, including residential

A second published source — a cost segregation provider's engineering data — publishes total accelerated percentages (5-year + 7-year + 15-year combined) drawn from completed studies. This is the only published dataset we've found that covers residential property types in detail:

Property type	Typical total reclassified %	Source
Single-family rental	5–32%	Cost Seg Smart [3]
Short-term rental / Airbnb	19–39%	Cost Seg Smart [3]
Condo (long-term)	10–17%	Cost Seg Smart [3]
Condo STR	6–35%	Cost Seg Smart [3]
Duplex / triplex / fourplex	14–28%	Cost Seg Smart [3]
Multifamily (5+)	14–26%	Cost Seg Smart [3]
Office	16–29%	Cost Seg Smart [3]
Restaurant	16–29%	Cost Seg Smart [3]
Retail	20–37%	Cost Seg Smart [3]
Industrial / warehouse	15–28%	Cost Seg Smart [3]

The residential numbers explain a lot. A furnished short-term rental reclassifies nearly double what an unfurnished single-family rental does, because all that furniture and equipment is 5-year property. A condo reclassifies the least — you don't own the roof, the foundation, the exterior walls, or the parking lot, so there's simply less building to segregate.

These totals line up reasonably well with other published provider ranges. Seneca Cost Segregation publishes typical ranges including warehouses (10–17%), offices (12–25%), apartments (20–30%), retail stores (15–32%), hotels (25–35%), restaurants (23–40%), and medical facilities (25–43%) [4]. R.E. Cost Seg publishes baseline-to-optimal bands such as single-family homes (27–38%), apartment buildings (26–38%), offices (28–41%), retail (28–42%), hotels (29–46%), and industrial facilities (25–39%) [5]. Different datasets, different methodologies — but they cluster in the same neighborhoods, which is what you'd expect from honest engineering.

What the numbers mean in dollars

Take the published example from the same engineering dataset: a $500,000 furnished short-term rental with $400,000 of depreciable basis after land. At the typical 26% reclassification rate, about $104,000 moves into Year-1 deductions under 100% bonus depreciation [3]. At a 37% marginal rate, that's roughly $38,000 in federal tax savings from a single study — which is why the first question to ask is always where your property lands inside these ranges, not what the average is.

You can get a rough sense of that with our free cost segregation calculator before committing to a full study.

Methodology caveats (read these before quoting a number)

The IRS publishes classification rules, not percentages. The IRS Cost Segregation Audit Techniques Guide defines the 13 principal elements of a quality study and how components should be classified — it does not say what share of an office building is 5-year property. Any per-type percentage is an estimate, including ours.

Every percentage above is of depreciable basis, not purchase price. A study showing "25% reclassified" on a $1M property with 20% land means $200,000 of accelerated basis — not $250,000.

Ranges are wide because properties vary. Age, finish level, renovations, site improvements, and the land allocation all move the number. A 1995 rental with original carpet and a big deck lands higher than a 2022 new build with hardwood floors.

Distrust 40–50%+ claims on standard properties. When a study shows 40%+ accelerated on an ordinary building, it usually means structural components were aggressively classified as personal property or the land allocation was understated — both are audit problems waiting to happen [3].

The 15-year bucket deserves more respect. Land improvements are often 8–12% of depreciable basis and are among the most audit-resistant classifications in a study — a driveway is a driveway. For properties with significant site work, the 15-year bucket can exceed the 5-year bucket [3].

The bottom line

Reclassification percentages are a useful planning input, not a promise. Use published ranges to sanity-check a study — if a firm's numbers sit far outside every published band for your property type, ask pointed questions about methodology before you file. And if you want to know where your specific property lands, run the numbers or read what a cost segregation study actually includes.

Sources

[1] Property-type reclassification benchmarks (5-yr / 7-yr / 15-yr): cre-skills-plugin cost segregation analyzer
[2] Typical reclassification percentages by property type: cost-seg-methodology reference
[3] Total accelerated percentages and worked examples: Cost Seg Smart — Cost Segregation Percentages by Property Type
[4] Typical reclassification ranges by property type: Seneca Cost Segregation
[5] Baseline and optimal reclassification by asset class: R.E. Cost Seg
IRS classification methodology: IRS Cost Segregation Audit Techniques Guide