Cost Segregation
Accelerate depreciation, cut your tax bill in the early years, and — if you qualify — offset W-2 income. Here's how cost segregation works, when it pays, and how to do it defensibly.
Cost segregation is how real-estate owners front-load depreciation instead of spreading it evenly over decades.
The IRS normally makes you depreciate a building over 27.5 years (residential rental) or 39 years (commercial). A cost segregation study breaks the property into its components and reclassifies the ones that qualify — carpet, cabinetry, appliances, specialty electrical, landscaping, site improvements — into 5-, 7-, and 15-year property. Those shorter-lived assets can then be depreciated far faster, and when bonus depreciation applies, much of it can be deducted in year one.
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Open the calculator →An engineer reviews construction documents, cost records, and the property to identify and value every reclassifiable component.
Eligible components move from 27.5/39-year buckets into 5-, 7-, and 15-year property with documentation for each.
Those shorter-lived assets — plus bonus depreciation where it applies — produce a large front-loaded deduction, often in year one.
They range from rigorous engineering work to quick estimates — and the difference shows up on audit.
The gold standard. Full engineering review with line-item documentation — the most accurate and audit-defensible method, and what the IRS's Audit Techniques Guide favors.
Estimates from cost models and photos without a full site review. Cheaper and faster, but less granular and weaker if the numbers are challenged.
A broad percentage allocation with little analysis. Cheapest and quickest, but the least defensible — rarely worth it for a real deduction.
For anyone using cost segregation to offset W-2 income, audit-defensibility matters — which is why the engineering study is usually worth it. See how this fits the STR tax strategy →
Accelerated depreciation is only useful if you have income to offset and enough holding period for the time value of money to work. Passive investors may have losses suspended; short-term-rental operators who materially participate can often use them against active income. And remember recapture on sale — this is a timing play, not free money.
Parikh Financial runs the ROI math, coordinates the engineering study, and handles the depreciation and filing.
Book a free consultationA cost segregation study is an engineering-based analysis that breaks a building into its components and reclassifies eligible parts — fixtures, flooring, appliances, land improvements — into shorter depreciation lives (5, 7, or 15 years) instead of the standard 27.5 or 39 years. That lets you front-load depreciation and cut taxable income in the early years of ownership.
A detailed engineering study typically runs a few thousand to low five figures depending on property size and complexity. Below roughly $500,000 in building basis, the fee can eat into the benefit, so the ROI math matters — which is exactly what we help you run before you commit.
Often yes. Combined with bonus depreciation and the short-term-rental material-participation rules, a study can generate a large first-year loss that offsets W-2 or other active income. The benefit depends on your holding period, tax bracket, and whether you meet the STR tests — model it first.
The accelerated depreciation is recaptured on sale, often taxed up to 25% on certain components. Cost segregation is a timing and time-value-of-money play, not free money — so the exit matters as much as year one. We model recapture before recommending a study.
General information, not tax advice. Outcomes depend on your facts and current law, which changes. Confirm with a qualified advisor before acting.