Rental property depreciation is a tax deduction that recovers the cost of the building — not the land — over 27.5 years for residential rental property on a straight-line schedule, per IRS Publication 527: a $410,000 building basis produces a $14,909 annual deduction in a full year. Cost segregation is an engineering study that reclassifies components of that building into 5-, 7-, and 15-year property classes, accelerating the same total deduction into the early years of ownership.
This site publishes information about tax mechanics, not tax advice. Depreciation treatment depends on facts specific to each property and taxpayer, and the figures below carry their sources and as-of dates.
How does rental property depreciation work?
Depreciation for residential rental real estate spreads the building's cost evenly over 27.5 years, beginning when the property is placed in service and ending when it is disposed of or stops being used as a rental. The deduction covers the building and capital improvements, never the land, because land does not wear out. Basis is generally cost plus capital improvements, adjusted for certain items.
The first-year wrinkle is convention: a mid-month convention applies regardless of the actual closing date, so a building placed in service in late June depreciates as though in service from mid-June — roughly half a year's deduction, per the IRS schedule in Publication 527. Full-year deductions follow until the year of disposal, which gets a fraction under the same convention.
The deduction requires no cash outlay — that is its economic character. The building's cost is treated as consumed over time, and the deduction offsets rental income that does exist in cash. A property with positive rental cash flow can therefore show a tax loss, which is where passive-activity rules enter: rental losses generally offset passive income, with the treatment of any excess governed by the passive activity loss limitations and the stated exceptions for qualifying real estate professionals and the modified adjusted gross income-based allowance.
What is cost segregation and what does it change?
A cost segregation study is an engineering analysis of the building's components — carpet, cabinetry, certain electrical systems, site improvements such as fencing and paving — that reclassifies qualifying items from 27.5-year real property into 5-, 7-, and 15-year personal and land-improvement property classes. The total deduction does not change; its timing does.
The acceleration matters because of bonus depreciation. Legislation enacted in July 2025 made 100 percent bonus depreciation permanent for qualifying property acquired after January 19, 2025, per IRS guidance issued in 2025 — restoring immediate expensing of the full cost of qualifying short-life property, after the phase-down years when the bonus percentage had declined to 40 percent for 2025-placed property under prior law. A study that moves, for example, a quarter of a building's basis into 5- and 15-year property makes that quarter deductible immediately under bonus treatment, subject to the passive-loss limits above.
The study is a document, not a form. It carries engineering costs, stands on component-level analysis, and holds up in examination to the extent its classifications trace to the underlying authority — the IRS's audit techniques guide for cost segregation sets the agency's expectations for what a defensible study contains.
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What happens at sale: depreciation recapture?
Every dollar of depreciation claimed — or allowable, whether or not actually claimed — reduces the property's basis and is recaptured at sale. For the straight-line portion on real property, unrecaptured section 1250 gain is taxed at a maximum rate of 25 percent, a statutory rate that sits above most long-term capital gains rates; the short-life, personal-property portion reclassified by a cost segregation study and expensed under bonus depreciation is generally recaptured as ordinary income.
An illustration using round numbers, not tax advice: a building basis of $410,000 depreciated for ten full years accumulates about $149,000 of straight-line depreciation, and a sale producing a gain above that figure splits into unrecaptured section 1250 gain taxed at up to 25 percent and remaining long-term capital gain at the applicable rate. The deduction reduced taxes at the owner's ordinary rate during the hold; the recapture claws part of that back at sale.
The recapture is why acceleration is timing, not forgiveness. Bonus depreciation on reclassified components moves deductions from the 2030s and 2040s into the current year, and the recapture at sale moves with them — ordinary-income character included. A like-kind exchange under section 1031 defers both the gain and the recapture, under the 45-day identification and 180-day closing rules this site has covered separately, and the deferral carries its own compliance requirements.
When does a cost segregation study carry weight?
The economics scale with basis and with the composition of the property. Larger-basis buildings and assets with heavy short-life content — furnished units, extensive paving, resort-style amenities — produce larger reclassified fractions. A small, plain single-family rental may not generate enough accelerated deduction to cover the study's cost; the practical threshold is a fact question, and practitioners typically evaluate it against the building's basis rather than a universal cutoff.
Timing matters as well. The study is most consequential in the placed-in-service year, when bonus depreciation on the reclassified fraction is largest, and after major capital work — a roof-to-studs renovation creates fresh component basis to classify. An election out of bonus depreciation for a class of property is available where the taxpayer's arithmetic favors the regular schedule, per the IRS guidance in effect for the year.
The study's conclusions feed a specific line of the return: Form 4562, where the depreciation deduction is computed and reported, and where the components' classes, conventions, and any bonus elections are stated. The study is the substantiation behind those lines if the return is examined.
What records does a landlord need to keep?
The depreciation file is the closing statement, the basis allocation between land and building, records of capital improvements with dates placed in service, any cost segregation study with its engineering backup, and each year's Form 4562. The land-building split is not elective — it follows the reasonable allocation the taxpayer can support, commonly from the assessment or appraisal record.
Disposition records complete the arc: the sale closing statement, accumulated depreciation, and the split of gain between unrecaptured section 1250, ordinary recapture, and long-term capital gain. The recapture computation is only as clean as the annual records behind it, which is the mundane argument for keeping every year's depreciation schedule with the deed.
None of this is a reason to treat the deduction as free money. Depreciation is a timing benefit with a recapture price, cost segregation is a paid study that accelerates the timing, and the interaction with passive-loss limits decides how much of either reaches a given taxpayer's return in a given year — the questions a qualified tax professional answers for a specific fact pattern, and the reason this article stops at mechanics.