MACRS Depreciation: How to Depreciate Business Assets
When you buy business equipment, a vehicle, or property, you generally can't deduct the entire cost in the year of purchase — you must depreciate it over its useful life. The IRS has a prescribed system for this: MACRS, the Modified Accelerated Cost Recovery System. Understanding MACRS helps you plan purchases, time deductions, and maximize early-year tax savings.
What MACRS Is — and Why It Matters
MACRS became the standard depreciation method for US federal income tax purposes starting in 1987. It replaced the earlier ACRS system with more specific asset classes and generally more favorable (accelerated) rates.
Under MACRS, each asset is assigned to a property class based on its asset type or IRS-designated class life. That class determines:
- How many years you can depreciate the asset
- Which depreciation method applies (200% declining balance, 150% DB, or straight-line)
- Which convention applies (half-year, mid-quarter, or mid-month)
The result: a schedule of annual deductions that reduces your taxable income over the recovery period — with more deductions in the early years under accelerated methods.
GDS vs. ADS: The Two MACRS Systems
General Depreciation System (GDS) is the default and offers shorter recovery periods with accelerated methods. This is what most businesses use for most assets.
Alternative Depreciation System (ADS) uses longer recovery periods and straight-line depreciation. ADS is required for:
- Listed property not used predominantly for business (≤50% business use)
- Property used outside the United States
- Certain tax-exempt use and tax-exempt bond-financed property
- Some farming property
- Certain imported property covered by an executive order
Some businesses also voluntarily elect ADS to smooth out deductions over a longer period — for example, to avoid the passive activity loss rules in real estate partnerships.
Property Class Lives: The Complete Picture
| Recovery Period | Property Type | Method |
|---|---|---|
| 3-year | Certain short-lived tools, racehorses | 200% DB → SL |
| 5-year | Computers, laptops, tablets, cars, light trucks, vans, research & experimentation equipment | 200% DB → SL |
| 7-year | Office furniture, desks, filing cabinets, most general machinery and equipment, agricultural equipment | 200% DB → SL |
| 10-year | Water transportation property, single-purpose agricultural structures | 200% DB → SL |
| 15-year | Land improvements (parking lots, fences, landscaping, sidewalks), retail fuel outlets | 150% DB → SL |
| 20-year | Farm buildings (other than single-purpose), municipal wastewater plants | 150% DB → SL |
| 27.5-year | Residential rental property | Straight-line |
| 39-year | Nonresidential real property (commercial, office, industrial) | Straight-line |
If an asset isn't listed in IRS Revenue Procedure 87-56 or the relevant tables, it defaults to 7-year GDS property.
The Half-Year Convention
MACRS personal property (everything except real property) uses the half-year convention: regardless of when during the year you actually place an asset in service, you're treated as if you placed it in service at the midpoint of the year — July 1. This means:
- Year 1: You get only half a year of depreciation
- Final recovery year: Also half a year
- This extends the recovery period by one calendar year (a 5-year asset takes 6 years to fully depreciate)
The half-year convention simplifies calculations and eliminates any incentive to rush purchases to December 31 (or delay them to January 1).
Mid-quarter convention: If you place more than 40% of your total personal property additions in service during Q4, you must use the mid-quarter convention instead. Each asset placed in service during Q1, Q2, Q3, or Q4 gets 10.5, 7.5, 4.5, or 1.5 months of depreciation respectively in year 1. This is more complex and generally less favorable for Q4 purchases.
Real property uses mid-month convention: Residential and commercial real property get a half-month of depreciation in the month placed in service and the month of disposition.
Bonus Depreciation: Immediate First-Year Deductions
Bonus depreciation (Section 168(k)) allows businesses to deduct a large percentage of an asset's cost in year 1, dramatically accelerating the tax benefit. It applies automatically to qualifying property (you must affirmatively opt out if you don't want it).
Current phase-down schedule under the Tax Cuts and Jobs Act as modified:
| Tax Year | Bonus Depreciation % |
|---|---|
| Before 2023 | 100% |
| 2023 | 80% |
| 2024 | 60% |
| 2025 | 40% |
| 2026 | 40% (extended under current law) |
| 2027 | 20% |
| 2028+ | 0% (unless Congress acts) |
Bonus depreciation applies to both new and used qualifying property (used property must be new to the taxpayer). It can create a net operating loss (NOL), which carries forward to offset future income — unlike Section 179.
Section 179 Expensing
Section 179 allows immediate expensing of qualifying property up to a dollar limit. Key rules for 2026:
- Annual dollar limit: $1,220,000
- Phase-out threshold: Dollar-for-dollar reduction when total acquisitions exceed $3,050,000
- Taxable income limitation: The deduction cannot exceed your net taxable income from active business activities. Excess carries forward indefinitely.
- Qualifying property: Tangible personal property, off-the-shelf computer software, qualified improvement property (QIP), and certain listed property
Section 179 cannot create a tax loss — this distinguishes it from bonus depreciation, which can. When business income is limited, Section 179 carries forward; bonus depreciation generates an NOL.
Listed Property Rules
"Listed property" — vehicles, computers used for entertainment or transportation, cameras — faces extra scrutiny:
- Must be used more than 50% for business to use MACRS GDS (otherwise required to use ADS straight-line)
- Must maintain adequate records proving business-use percentage
- If business use drops to 50% or below in a later year, depreciation recapture is triggered
The luxury auto limitations cap depreciation on passenger vehicles regardless of cost, even with Section 179 and bonus depreciation combined. The 2026 caps are approximately $12,400 in year 1 (without bonus depreciation) or $20,400 with bonus depreciation.
Recapture on Sale: Section 1245
When you sell a depreciable business asset for more than its adjusted basis (original cost minus accumulated depreciation), you face Section 1245 recapture — the gain attributable to prior depreciation is taxed as ordinary income, not capital gains.
Example: You buy equipment for $50,000, take $30,000 in MACRS depreciation. Adjusted basis = $20,000. You sell for $35,000. The $15,000 gain ($35,000 – $20,000) is ordinary income subject to Section 1245 recapture, not capital gain — even though you held it for more than a year.
Excess above the original cost ($50,000 in this case) would be capital gain. Understanding recapture is critical when planning equipment sales or trade-ins.
Practical Example: $50,000 Equipment Over Its Life
A $50,000 piece of manufacturing equipment (7-year property, GDS) with 40% bonus depreciation in 2026:
Year 1: $20,000 bonus + ($30,000 remaining basis × 14.29% × 50% half-year) = $20,000 + $2,143 = $22,143
Remaining MACRS years 2–8 depreciate the $30,000 remaining basis using GDS rates — generating approximately $27,857 in additional deductions over the next 7 years.
For hands-on calculation of any asset's depreciation schedule, use our MACRS Depreciation Calculator.
This article is for informational purposes only. Depreciation rules involve complex interactions with elections, property classification, and tax law changes. Always consult a qualified tax professional before making depreciation decisions.