Cost Segregation on a $500K Duplex: $88,000 in Accelerated Depreciation

Duplexes offer a unique cost segregation advantage: two sets of kitchens, bathrooms, and appliances mean more personal property to reclassify.

$88,000 Accelerated Depreciation

$32,560 Est. Year-1 Tax Savings

33x Return on Study Cost

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Property Type

Purchase Price

$32,560

Estimated Year-1 Tax Savings

$88,000

Accelerated Deductions

$995

Study Cost

33x

ROI on Study

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Estimates are for illustration only. Details

What This Means for a $500,000 Duplex

$500,000 Duplex property — cost segregation depreciation example

A $500K duplex is one of the most efficient property types for cost segregation. Because each unit contains its own full set of depreciable components — kitchen cabinets, countertops, appliances, bathroom fixtures, flooring, and lighting — a duplex effectively doubles the personal property inventory compared to a single-family rental at the same price.

The typical cost segregation study on a $500K duplex reclassifies roughly $88K into accelerated MACRS classes. The split skews slightly higher toward 7-year property (10% vs. 10% for SFR) because duplexes tend to have more shared-system components like HVAC units, water heaters, and electrical panels that serve both units.

For house-hackers living in one unit and renting the other, cost segregation applies to the entire property basis — not just the rented portion. The IRS allows depreciation on the full property as long as at least one unit is rented. This makes duplexes particularly attractive for investors who want to live in their investment while maximizing tax benefits.

MACRS Depreciation Breakdown

Accelerated Depreciation by MACRS Class

$88,000 total reclassified into shorter recovery periods

5-Year Property $48,400

55%

7-Year Property $8,800

10%

15-Year Property $30,800

35%

Estimated Year-1 Tax Savings $32,560

Illustrative estimate. Final allocations vary based on property facts and report findings.

Method

Year-1 Deduction

Difference

Standard (27.5yr straight-line)

$14,545

—

With Cost Segregation + Bonus

$88,000

+$73,455

Estimated deduction based on typical cost segregation allocations for duplex properties. Actual study results may vary based on property-specific analysis including age, condition, renovations, and local construction costs.

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Why Cost Segregation Works for Duplexes

Duplexes contain two complete sets of kitchens, bathrooms, appliances, and fixtures — effectively doubling the personal property inventory compared to a single-family rental at the same price point. Each unit contributes its own cabinetry, countertops, flooring, lighting, and bathroom fixtures to the 5-year MACRS class.

Shared building systems like HVAC units, water heaters, and electrical panels that serve both units qualify as 7-year property. Common-area improvements and site work — driveways, walkways, fencing, landscaping — fall into the 15-year class. The combination of per-unit and shared components creates a rich reclassification profile.

For house-hackers who live in one unit and rent the other, cost segregation applies to the entire property basis — not just the rented portion. The IRS allows depreciation on the full property as long as at least one unit is placed in service as a rental.

Who This Example Applies To

Duplex investors (owner-occupied or fully rented)
House-hackers living in one unit while renting the other
Investors in the 24-37% federal bracket
Properties with standard residential finishes in both units

Passive activity loss rules apply to long-term rental duplexes unless you qualify as a Real Estate Professional. Results vary based on property age, unit finish quality, and local construction costs.

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Compare: Duplex at Different Price Points

Price	Accelerated	Tax Savings	Study Cost	ROI
$500K	$88,000	$32,560	$995	33x
$350K	$61,600	$22,792	$995	23x

Compare: $500,000 Across Property Types

Property Type	Accelerated	Tax Savings	Study Cost	ROI
Airbnb / Short-Term Rental	$120,000	$44,400	$795	56x
Rental Property	$80,000	$29,600	$795	37x
Duplex	$88,000	$32,560	$995	33x
Condo	$68,000	$25,160	$795	32x
Triplex	$88,000	$32,560	$995	33x

Frequently Asked Questions

What is a cost segregation study? ▼

A cost segregation study is an engineering-based analysis that reclassifies components of your property into shorter IRS depreciation categories (5, 7, and 15 years) instead of the default 27.5 or 39 years. This accelerates your depreciation deductions, reducing your tax bill in the early years of ownership.

Why are duplexes especially good for cost segregation? ▼

Duplexes contain two complete sets of kitchens, bathrooms, appliances, and fixtures — doubling the personal property inventory compared to a single-family home at the same price. This means a higher percentage of the property's depreciable basis falls into accelerated MACRS classes. The IRS allows depreciation on the entire property as long as at least one unit is rented.

How long does a cost segregation study take? ▼

Our studies are delivered in 3-5 business days. You provide the property address, purchase price, and closing date — we handle everything else using assessor records, satellite imagery, and construction cost databases. No site visit or tenant disruption required.