Asset Class Life Under MACRS and GDS Recovery Periods

Under the Modified Accelerated Cost Recovery System, MACRS asset class lives and recovery periods determine how many years you spread the cost of a business asset across your tax returns. Most tangible personal property falls into a 3-, 5-, 7-, 10-, 15-, or 20-year bucket under the General Depreciation System (GDS); buildings use 27.5 or 39 years. The class life comes from Revenue Procedure 87-56, and IRS Publication 946 reprints the tables in a form built for lookup.¹

Class Life vs. Recovery Period

Two numbers travel with every asset, and they aren’t the same. The class life is the expected useful life the IRS has assigned to that type of property. The recovery period is the shorter number you actually use to compute depreciation under GDS. An office desk, for example, has a class life of 10 years but a GDS recovery period of 7 years.¹

The lookup starts in Rev. Proc. 87-56. Its tables are organized in two groups. The first covers property used across all industries: office furniture, vehicles, computers, and the like. The second covers assets tied to a specific activity, such as petroleum refining or food manufacturing. Each entry gives a class life, a GDS recovery period, and an ADS recovery period. If your asset doesn’t match a specific description anywhere in the tables, it defaults to a 7-year GDS recovery period (12 years under ADS).¹

GDS Recovery Periods for Equipment and Personal Property

GDS is the default system for most businesses. It pairs each class with an accelerated method (200% or 150% declining balance) and one of the recovery periods below.

3-year property: over-the-road tractor units, racehorses over two years old when placed in service, other horses over twelve years old, and qualified rent-to-own property.
5-year property: automobiles, taxis, buses, trucks, computers and peripherals, office machinery such as copiers, and certain technological equipment. Most tech hardware lands here.
7-year property: office furniture and fixtures (desks, filing cabinets, safes), agricultural machinery placed in service after 2017, and any asset without a class life that hasn’t been assigned elsewhere. This is the catch-all bucket.
10-year property: vessels, barges, tugs, and other water transportation equipment, plus single-purpose agricultural and horticultural structures like poultry houses or purpose-built greenhouses.
15-year property: land improvements such as fences, roads, sidewalks, bridges, and shrubbery. Qualified improvement property to nonresidential buildings also sits here.
20-year property: farm buildings that are not single-purpose agricultural or horticultural structures, such as general-use barns or equipment storage buildings.

A common trap is confusing farm buildings with single-purpose agricultural structures. A poultry house built exclusively to raise chickens is a single-purpose structure with a 10-year GDS recovery period. A general-purpose barn used for storage or mixed activities is a 20-year farm building. Grain bins, which store fungible commodities in bulk, are 7-year property under GDS.²

Recovery Periods for Buildings

Real property uses straight-line depreciation and much longer recovery periods than equipment.

Residential rental property has a 27.5-year recovery period. At least 80% of the building’s gross rental income for the year must come from dwelling units. Apartment buildings, rental houses, and mobile homes rented as residences qualify.³

Nonresidential real property is 39 years. That covers office buildings, warehouses, retail stores, and any building that doesn’t meet the 80% dwelling-unit test.¹ For a mixed-use building sitting near the line, whether the property clears 80% residential income in a given year changes the annual deduction meaningfully.

Qualified Improvement Property

Interior improvements to an existing nonresidential building get their own classification. Qualified improvement property covers improvements to the inside of a commercial building placed in service after the building itself was first put into use. The improvement cannot enlarge the building, add an elevator or escalator, or alter the internal structural framework.¹

Qualifying improvements use a 15-year GDS recovery period rather than the 39 years that applies to the building itself. That covers a lot of tenant buildout work, along with new HVAC, fire alarms, and security upgrades in commercial space.

When You Must Use ADS Instead

The Alternative Depreciation System uses straight-line depreciation and longer recovery periods than GDS. It is mandatory for property used predominantly outside the United States, property leased to tax-exempt organizations, and farming property when the business has elected out of the uniform capitalization rules for certain farming costs. Real property trades or businesses that elect out of the business interest limitation under Section 163(j) must also use ADS for their real property.¹

The ADS periods for commonly encountered assets:

Automobiles and light trucks: 5 years
Computers and peripherals: 5 years
Office furniture and fixtures: 10 years
Personal property with no class life: 12 years
Single-purpose agricultural structures: 15 years
Farm buildings: 25 years
Residential rental property: 30 years
Nonresidential real property: 40 years

The practical effect is smaller annual deductions over a longer stretch. Office furniture moves from 7 years under GDS to 10 under ADS. Residential rental stretches from 27.5 to 30. For a real property business electing out of the interest deduction limitation, the trade can still be worthwhile, because the larger interest deduction can more than offset the slower cost recovery.

The Convention Sets Your First-Year Depreciation

The recovery period tells you how many years; the convention tells you how much of the first year counts. There are three.

The half-year convention treats all personal property as placed in service at the midpoint of the tax year, regardless of the actual date. You get half a year of depreciation in year one and half a year at the end of the recovery period. This is the default for most equipment and furniture.¹

The mid-quarter convention takes over when more than 40% of your total depreciable personal property for the year is placed in service during the last three months. Each asset is then treated as placed in service at the midpoint of the quarter it actually went into use. The rule keeps businesses from bunching December purchases and claiming a half-year deduction for property that was only in service for a few weeks. The 40% test excludes real property, railroad grading, and property placed in service and disposed of in the same year, and the basis used for the test is reduced by any Section 179 amount but not by bonus depreciation.¹

The mid-month convention applies to all real property. Each building is treated as placed in service at the midpoint of the month it actually went into use, so the first month counts as a half-month.¹

Vehicles and Listed Property

Certain assets that mix business and personal use get extra rules. The IRS calls them listed property, and the category includes passenger automobiles, other transportation equipment like boats and motorcycles, and property generally used for entertainment or recreation. Computers and peripherals were removed from this category by the Tax Cuts and Jobs Act for tax years after 2017.⁴

Listed property must be used more than 50% for qualified business purposes to claim Section 179 expensing, bonus depreciation, or accelerated depreciation methods. If business use drops to 50% or below in any year during the recovery period, you must switch to straight-line ADS depreciation and recapture the excess depreciation you claimed previously, added back to income as ordinary income.¹

Passenger automobiles also face annual dollar caps that override the ordinary 5-year GDS schedule. For vehicles placed in service in 2026, the caps are $20,300 in year one with bonus depreciation, $12,300 in year one without bonus, $19,800 in year two, $11,900 in year three, and $7,160 in each succeeding year.⁵ For an expensive car, depreciation stretches well past the 5-year window because the later-year cap limits how fast you recover the remaining cost. Heavy SUVs and trucks with a gross vehicle weight rating above 6,000 pounds are exempt from these caps, but face a separate $32,000 Section 179 limit for 2026.¹

When the Recovery Period May Not Matter

Before spreading the cost over the assigned years, check whether the asset qualifies to be expensed up front.

Section 179 lets you deduct the full purchase price of qualifying property in the year it goes into service. For tax years beginning in 2026, the maximum deduction is $2,560,000, phasing out dollar-for-dollar once qualifying property placed in service during the year exceeds $4,090,000. Eligible property includes tangible personal property like machinery, equipment, and furniture, along with certain nonresidential building improvements (roofs, HVAC, fire protection, and security systems). The deduction cannot exceed taxable income from active business operations for the year; any excess carries forward.¹

Bonus depreciation is the other route. The One, Big, Beautiful Bill Act, signed into law on July 4, 2025, permanently restored 100% first-year bonus depreciation for qualified property acquired after January 19, 2025.⁶ There is no dollar ceiling and no taxable income limitation. Property acquired before January 20, 2025, follows the older phase-down schedule from the Tax Cuts and Jobs Act, and for such property placed in service in 2026, the bonus percentage is just 20%.⁵ The acquisition date, not the placed-in-service date, decides which rate applies.

When either option fully covers the asset, the class life still matters for recordkeeping and for any later drop in business use, but the annual depreciation math effectively ends in year one.

1
Internal Revenue Service. Publication 946 (2025), How To Depreciate Property
2
Internal Revenue Service. Publication 225 (2025), Farmer’s Tax Guide
3
Internal Revenue Service. Publication 527 (2025), Residential Rental Property
4
Internal Revenue Service. Tax Cuts and Jobs Act – A Comparison for Businesses
5
Internal Revenue Service. Rev. Proc. 2026-15
6
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One, Big, Beautiful Bill