Depreciation Life of Capital Improvements by Property Type

Capital improvements to business or investment property are written off through depreciation, and the recovery life depends on what you improved. Under the IRS’s Modified Accelerated Cost Recovery System, the depreciation life of a capital improvement by property type runs 27.5 years for residential rental buildings, 39 years for nonresidential (commercial) real property, 15 years for land improvements and Qualified Improvement Property, and 5 or 7 years for most tangible personal property. Bonus depreciation and Section 179 can compress most of that deduction into year one for anything with a recovery period of 20 years or less.

First, Is It Really a Capital Improvement?

The recovery life only matters if the expense actually has to be capitalized. If it’s a repair, you deduct the whole cost in the year you pay it. Capitalizing a repair locks up your money for decades; expensing a true improvement invites penalties on audit.

The IRS uses what practitioners call the BAR test. An expenditure must be capitalized if it meets any one of three criteria:¹

Betterment. The work materially increases the property’s capacity, strength, or quality. Swapping a standard HVAC unit for a higher-capacity one qualifies.
Adaptation. The work converts the property to a new or different use, like remodeling a storefront into apartments.
Restoration. The work replaces a major component or returns the property to working condition after a casualty. Replacing an entire roof counts; patching a leak does not.

Anything that trips the BAR test gets capitalized and depreciated. Routine maintenance such as repainting, minor plumbing fixes, and replacing broken window panes stays immediately deductible.

The De Minimis Safe Harbor

Small-dollar purchases don’t have to run through depreciation at all. The de minimis safe harbor lets you immediately deduct tangible property costing up to $2,500 per invoice or per item, or up to $5,000 if you have an applicable financial statement such as an audited statement.¹ To use it, attach a statement titled “Section 1.263(a)-1(f) de minimis safe harbor election” to your timely filed return. Once elected, it applies to every qualifying purchase for that year.

Recovery Periods by Property Type

Once something is properly classified as a capital improvement, MACRS assigns it a specific recovery period. The clock starts the day the improvement is placed in service, meaning ready for its intended use, not the day you paid for it.

Residential Rental Property: 27.5 Years

A building counts as residential rental property when 80 percent or more of its gross rental income comes from dwelling units.² Capital improvements to those buildings, including a new roof, replacement windows, or a furnace, depreciate over 27.5 years using the straight-line method, so you deduct the same amount each year.³

Nonresidential Real Property: 39 Years

Offices, warehouses, retail spaces, and other commercial buildings carry a 39-year recovery period.² Structural improvements to those buildings, including work on the roof, foundation, walls, and integrated HVAC systems, also depreciate over 39 years, straight-line. The one major exception is interior work that qualifies as Qualified Improvement Property, covered below.

Land Improvements: 15 Years

Improvements made to land or added onto it depreciate over 15 years. This class covers fences, sidewalks, roads, driveways, bridges, retaining walls, and landscaping.⁴ The default method is 150-percent declining balance, which front-loads slightly larger deductions in the early years before shifting to straight-line.²

Personal Property: 5 or 7 Years

Assets that aren’t permanently attached to real estate get much shorter lives. Five-year property includes automobiles, office machinery such as copiers and calculators, appliances and carpets in residential rentals, and property used in research. Seven-year property covers office furniture and fixtures such as desks, filing cabinets, and safes. If an asset has no designated class life and no other class assigned by law, it defaults to seven years.⁴

Both 5-year and 7-year property use the 200-percent declining balance method, which gives you noticeably larger deductions in the early years compared with straight-line.² You can elect straight-line if level deductions suit your situation better, but most taxpayers stick with the accelerated method.

Qualified Improvement Property: The 15-Year Exception

Qualified Improvement Property, or QIP, is the most valuable classification for owners of commercial buildings. It covers any interior improvement to a nonresidential building made after the building was first placed in service. Instead of the 39-year commercial life, QIP gets a 15-year recovery period, cutting the timeline by more than half.⁵

QIP also qualifies for bonus depreciation, so in most current situations the 15-year life is a backstop for taxpayers who don’t use or can’t use bonus. If you’re claiming bonus, you’re writing off 100 percent of QIP in year one anyway.

The boundaries are strict. QIP must be an interior improvement. Three categories are specifically excluded:

Building enlargements. Any work that expands the footprint.
Elevators and escalators. Installing or replacing vertical transportation.
Internal structural framework. Load-bearing walls, columns, girders, beams, and trusses. Work on the skeleton stays on the 39-year schedule.

Interior finish work such as drywall, flooring, ceilings, lighting, and nonload-bearing partitions all qualify. That makes QIP especially useful for tenant build-outs and interior renovations.

Compressing the Deduction Into Year One

The MACRS lives above are the default schedule. Bonus depreciation and Section 179 let you collapse most or all of that deduction into the year you place the asset in service.

Bonus Depreciation

The One Big Beautiful Bill Act permanently reinstated 100 percent bonus depreciation for qualified property acquired after January 19, 2025.⁶ Property with a MACRS recovery period of 20 years or less can be deducted in full in the year it’s placed in service. That sweeps in QIP, land improvements, and all 5-year and 7-year personal property. There’s no annual dollar cap.

Under the old Tax Cuts and Jobs Act phase-down, bonus was dropping from 100 percent (through 2022) to 80, 60, and 40 percent for 2023, 2024, and 2025 respectively.⁷ That phase-out is now essentially overridden for anything acquired after January 19, 2025. Property acquired before that date but placed in service later still follows the old schedule for its year.

If a smaller first-year deduction serves you better, you can elect 40 percent (or 60 percent for certain long-production-period property) instead of the full 100 percent for property placed in service during the first tax year ending after January 19, 2025.⁶

Section 179 Expensing

Section 179 lets you elect to deduct the full cost of qualifying tangible personal property and QIP in the year placed in service, up to an annually adjusted limit. For 2026, the maximum deduction is $2,560,000, phasing out dollar-for-dollar once total qualifying property placed in service exceeds roughly $4,090,000.⁴

Unlike bonus depreciation, Section 179 can’t create or increase a net operating loss. If your business income won’t absorb the full deduction, the excess carries forward. When both provisions apply to the same asset, Section 179 comes first, bonus depreciation covers the rest, and regular MACRS handles anything still left.

The 50-Percent Business Use Rule

Vehicles, computers used outside a regular business establishment, and other listed property have to be used more than 50 percent for qualified business purposes to be eligible for Section 179 or bonus depreciation. If business use later drops to 50 percent or less, you’ll recapture part of the accelerated deductions and report the recapture as income on Form 4797.⁸

How Much of Year One You Actually Get

You don’t get a full year of depreciation for the year you place an asset in service. The IRS applies standardized conventions that decide how much of that first (and last) year you can deduct.

Mid-Month Convention

Residential rental and nonresidential real property use the mid-month convention. The asset is treated as placed in service at the midpoint of the month, whatever the actual date. Install a new roof on your rental on March 3 and you get half a month of March plus the remaining nine months of the year.²

Half-Year Convention

Most other property, including 5-year, 7-year, and 15-year assets (land improvements and QIP), uses the half-year convention. Everything placed in service during the year is treated as placed in service at the year’s midpoint, so you get half a year’s depreciation regardless of the actual month.⁴ QIP specifically follows the half-year convention, not the mid-month convention that applies to other real property.⁵

Mid-Quarter Convention

If more than 40 percent of the total depreciable basis of your MACRS personal property placed in service that year lands in the last three months, the half-year convention is overridden. You use the mid-quarter convention instead, treating each asset as placed in service at the midpoint of its actual quarter.⁴ This blocks December buying sprees that would otherwise generate half a year’s deduction on a few weeks of ownership. Real property under the mid-month convention doesn’t count toward the 40-percent test.

What Happens When You Sell: Depreciation Recapture

Depreciation reduces your taxable income while you own the property, and the IRS recaptures some of that benefit at sale. The rules differ for personal property (Section 1245) and real property (Section 1250), and the numbers matter enough to shape whether and when to sell.

Section 1245 Recapture on Personal Property

Sell equipment, vehicles, or other personal property and the gain attributable to depreciation is taxed as ordinary income, not at capital gains rates. The recapture equals the lesser of your total gain or the total depreciation you claimed.⁹ Any additional gain becomes Section 1231 gain, generally taxed at capital gains rates.

Unrecaptured Section 1250 Gain on Real Property

Buildings and structural components depreciated with the straight-line method get better treatment. Gain attributable to that straight-line depreciation is taxed at a maximum rate of 25 percent rather than your ordinary rate.¹⁰ Gain above your original cost is taxed at the applicable long-term capital gains rate.

Watch the trade-off when a cost segregation study has reclassified building components into shorter-lived categories with bonus depreciation. Those reclassified components are Section 1245 property, so their depreciation faces full ordinary income recapture at sale. The larger deductions upfront come with a higher tax bill on the way out.

Fixing Missed or Wrong Depreciation

Depreciation errors are common. A prior owner used the wrong life, an improvement got expensed that should have been capitalized, or someone simply forgot to depreciate an asset. The IRS does not let you correct these by amending prior returns. You file Form 3115, Application for Change in Accounting Method.¹¹

Most depreciation corrections qualify for automatic consent, meaning no advance approval and no user fee. You file Form 3115 with your current-year return, and the cumulative effect gets captured in a Section 481(a) adjustment. If you underclaimed, the entire catch-up amount goes into your current year as a deduction. If you overclaimed, the additional income is typically spread over four years.

One detail that catches people: the IRS treats depreciation as “allowed or allowable.” Even if you never claimed depreciation on an asset, your basis is reduced as though you had. Skipping the deduction costs you the write-off without preserving basis for later. If you find missed depreciation, file Form 3115 to claim the catch-up rather than leaving the deduction on the table.

1
Internal Revenue Service. Tangible Property Regulations – Frequently Asked Questions
2
Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System
3
Internal Revenue Service. Depreciation and Recapture
4
Internal Revenue Service. Publication 946 – How To Depreciate Property
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Internal Revenue Service. Rev. Proc. 2020-25
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Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill
7
Internal Revenue Service. Publication 946 – How To Depreciate Property (2023)
8
Internal Revenue Service. Instructions for Form 4562
9
Office of the Law Revision Counsel. 26 U.S.C. 1245 – Gain From Dispositions of Certain Depreciable Property
10
Internal Revenue Service. Topic No. 409, Capital Gains and Losses
11
Internal Revenue Service. Instructions for Form 3115, Application for Change in Accounting Method