How I move parts of your rental off the 27.5-year schedule and into first-year deductions, with worked examples for a $300,000 single-family rental and a $1.5 million multifamily building.
Residential cost segregation lets you depreciate parts of your rental faster than the standard 27.5 years. A study pulls out the appliances, carpet, window coverings, driveway, fencing, and everything else that qualifies, and puts them on shorter schedules. With 100% bonus depreciation back for property acquired and placed in service after January 19, 2025, most of that can come off your taxes in year one.
For most rental owners, the question is whether the savings beat the cost of the study, so I’ll show you the math on both a single-family rental and a multifamily building.
27.5-Year Residential Depreciation vs. Cost Segregation
Every residential rental starts on the same schedule: 27.5-year straight-line depreciation. That’s the default whenever the property goes on your return as one asset.
But your rental isn’t one asset. It’s a structure plus a lot of things that wear out much faster than the framing and the roof, and the tax code lets you depreciate those on their own, shorter schedules. A cost segregation study identifies those components and puts a dollar value on each one.
Land never comes along for the ride. The land value comes out of your basis first, because land doesn’t depreciate. (If you own commercial property, the default is 39 years instead. I cover that on the commercial cost segregation page.)
Is Cost Segregation Worth It for Small Single-Family Rentals?
The feasibility of cost segregation for smaller properties largely depends on the balance between the cost of the study and the potential tax savings. Simply put, you need to calculate two things:
- The Price of the Study
- The Tax Savings (including the time value of money as you will likely use those savings to invest in more properties or the market)
There are two main types of studies to consider:
- Engineering-Backed Modeling Study: Priced at $850–$1,500, this option is affordable and effective for small properties. It uses advanced modeling tools to estimate asset classifications without requiring a site visit.
- Detailed Engineering Study: Ranging from $3,000 to $10,000, this comprehensive study includes site inspections and is ideal for larger properties or those with complex layouts.
Example Calculation for a Single-Family Rental:
- Purchase Price: $250,000 (excluding land value).
- Depreciable Basis: $200,000.
- Qualifying Assets: $50,000 identified as 5- and 15-year property.
- Bonus Depreciation (80% in 2023): $40,000 immediate deduction.
- Tax Savings (37% Tax Rate): $14,800.
Even without bonus depreciation, the accelerated deduction of $50,000 over 5 or 15 years offers significant savings compared to the standard straight-line depreciation. For smaller properties, an engineering-backed modeling study is often the most cost-effective solution.
Cost Segregation for Larger Multifamily Residential Investments
For larger properties, such as duplexes or multi-unit residential buildings, a detailed engineering study is usually recommended. The higher cost is justified by the precision and value of the deductions uncovered. Let’s look at an example:
Example Calculation for a Multi-Unit Property:
- Purchase Price:$1,500,000
- Depreciable Basis:$1,200,000.
- Qualifying Assets:$400,000 identified for shorter schedules.
- Bonus Depreciation (80% in 2023):$320,000 first-year deduction.
- Tax Savings (37% Tax Rate):Over $118,000.
For portfolio investors, a custom depreciation evaluation can also be considered. This involves analyzing multiple properties to create an overarching tax strategy, ensuring that deductions are maximized across the board.
8 Scenarios: When a Study Pays Off and When It Doesn’t
| Scenario | Worth It | Not Worth It |
|---|---|---|
| Older Property (In Service 20+ Years Ago) | Significant depreciation has already been claimed, leaving limited benefits from reclassification. | Limited tax savings unless substantial renovations or additions have been made. |
| New Property Purchase ($300,000) | Large depreciation deductions possible, especially with 5- and 15-year assets. | Property value under $200,000 (cost of study might exceed tax savings). |
| Older Property with Major Addition Added Recently | New addition provides fresh assets eligible for accelerated depreciation. Cost segregation can focus on these improvements. | If the addition value is low or under $100,000, tax savings may not justify a study. |
| Multi-Unit Residential Property ($1.5M Purchase Price) | Detailed engineering study uncovers significant savings. Ideal for long-term investors with high cash flow needs. | Short-term hold strategy (depreciation recapture risk). |
| Single-Family Rental ($250,000 Purchase Price) | Engineering-backed modeling study ($850–$1,500) can provide a cost-effective solution for identifying qualifying assets. | Minimal qualifying assets or if land value comprises a significant portion of the purchase price. |
| Property Held for Sale Within 2 Years | Depreciation recapture negates most of the tax benefits. | High risk of IRS scrutiny without proper planning. |
| Furnished Short-Term Rental Property ($500,000 Purchase Price) | FF&E (furniture, fixtures, and equipment) qualifies for accelerated depreciation. Bonus depreciation amplifies first-year savings. | Short-term hold with plans to sell in under 5 years. |
| Portfolio of Small Properties | Combine cost segregation studies for multiple properties into a single strategic plan. Portfolio-level analysis optimizes savings. | Low-value properties where aggregated savings don’t justify the cost of multiple studies. |
5- and 15-Year Property in a Rental Home
Residential properties often contain hidden components that qualify for shorter depreciation schedules. Identifying these requires a detailed breakdown by experts who understand the nuances of IRS guidelines. Commonly reclassified items include:
- 5-Year Property:Kitchen appliances, carpeting, window coverings, and removable partitions.
- 7-Year Property:Built-in furniture, shelving, and specialized fixtures.
- 15-Year Property:Fencing, driveways, sidewalks, and patios.
For single-family rentals purchased furnished, the Furniture, Fixtures, and Equipment (FF&E) often qualify for accelerated depreciation, provided they were included in the property’s purchase price and not deducted as operating expenses.
100% Bonus Depreciation on Rental Property
As of 2026, bonus depreciation is back to 100%. The One Big Beautiful Bill Act, signed July 4, 2025, permanently restored it for qualifying property acquired after January 19, 2025, and placed in service after January 19, 2025. Both dates matter. If you signed a binding contract before January 20, 2025, you’re on the old phase-down: 40% for property placed in service in 2025 and 20% in 2026.
Bonus only applies to property with a recovery period of 20 years or less. The 27.5-year structure gets none of it, but every dollar a study moves into 5- or 15-year property is eligible. That’s what turns a study into a year-one deduction. For more details, read our guide to bonus depreciation.
Is Cost Segregation Worth It?
For single-family rentals, duplexes, and multi-unit residential properties, cost segregation is a proven strategy to maximize tax savings. Whether through an affordable engineering-backed modeling study or a comprehensive detailed engineering study, this approach delivers significant financial benefits.
To explore your property’s potential, visit Maven Cost Seg and request your “EOB”. During this process, we will request information regarding your property and give you a detailed breakdown of the estimated savings should you get a cost segregation study.