MACRS Depreciation: Recovery Periods, Methods, and Conventions Explained

Every business asset loses value over time, and the IRS lets you deduct that decline through depreciation. MACRS is the system that governs how much you deduct each year. Understanding the recovery periods, methods, and conventions helps you plan purchases and maximize your small business tax deductions.

Key Takeaways

• MACRS assigns each asset a recovery period (5, 7, 15, 27.5, or 39 years are most common).
• The default GDS method front-loads deductions using 200% or 150% declining balance.
• Half-year and mid-month conventions determine first- and last-year deductions.
• Section 179 and bonus depreciation can override MACRS for faster write-offs.
• Correct asset classification directly impacts your annual deduction amount.

How MACRS Works

MACRS combines three elements to calculate your annual depreciation deduction:

1. Recovery period — how many years the asset is depreciated
2. Depreciation method — the formula used to calculate each year’s deduction
3. Convention — the rule for the first and last year of depreciation

Recovery Periods

The IRS assigns every depreciable asset to a property class with a specific recovery period:

If you own residential rental property (27.5-year class), our rental property tax guide covers the full picture of deductions, and the real estate investor tax playbook walks through strategies for building a tax-efficient portfolio. For commercial or residential buildings, a cost segregation study can reclassify building components into shorter recovery periods — moving portions of a 39-year building into 5-, 7-, or 15-year property for faster write-offs.

Land is never depreciable. When you purchase real property, you must allocate the purchase price between the building (depreciable) and the land (not depreciable). Common allocation methods include property tax assessments, appraisals, or the contract breakdown.

Depreciation Methods

GDS (General Depreciation System) — The Default

GDS is the standard MACRS method and what most taxpayers use. It applies accelerated depreciation:

Why accelerated methods matter: A $70,000 piece of 5-year equipment generates about $14,000/year under straight-line depreciation. Under 200% declining balance, the first year deduction is $14,000 (due to the half-year convention), but year 2 jumps to $22,400. You recover more of your cost sooner.

ADS (Alternative Depreciation System)

ADS uses straight-line depreciation over generally longer recovery periods. ADS is required for:

• Listed property used 50% or less for business (vehicles, cell phones, computers in some cases)
• Property used predominantly outside the United States
• Tax-exempt use property
• Tax-exempt bond financed property
• Farming property if you elect out of the uniform capitalization rules

ADS is elected when:

• You want consistent, predictable deductions
• You are subject to the Alternative Minimum Tax (AMT) and want to minimize AMT adjustments
• You have a real estate trade or business electing out of the business interest limitation under Section 163(j)

Common ADS recovery periods: 5-year property becomes 5-9 years, 7-year becomes 10 years, residential real property becomes 30 years, and nonresidential real property becomes 40 years.

Conventions

Conventions determine how much depreciation you take in the first and last year of an asset’s life.

Half-Year Convention (Most Common)

All property placed in service (or disposed of) during the year is treated as if it was placed in service at the midpoint of the year. You get half a year’s depreciation in year 1 and half a year’s depreciation in the final year.

This applies to most personal property (equipment, vehicles, furniture) unless the mid-quarter convention is triggered.

Mid-Quarter Convention

If more than 40% of your total depreciable personal property for the year is placed in service in the last three months (October-December), the mid-quarter convention applies to all personal property placed in service that year. Each asset is treated as placed in service at the midpoint of the quarter it was actually placed in service.

This convention exists to prevent taxpayers from bunching purchases in December to get a half-year of depreciation for just a few weeks of ownership. Watch for this if you make large year-end purchases.

Mid-Month Convention

Real property (27.5-year and 39-year) always uses the mid-month convention. The property is treated as placed in service at the midpoint of the month it was actually placed in service.

Example: A commercial building placed in service on March 8 is treated as placed in service on March 15. You get 9.5 months of depreciation in year 1 (mid-March through December).

MACRS Depreciation Tables

The IRS provides percentage tables in Publication 946 that give you the exact depreciation percentage for each year. Here are the most commonly used rates:

5-Year Property (200% DB, Half-Year Convention)

Note: 5-year property takes 6 calendar years to fully depreciate because of the half-year convention.

7-Year Property (200% DB, Half-Year Convention)

Calculating Depreciation

Step-by-step:

1. Determine the asset’s depreciable basis (purchase price minus land, if applicable, plus sales tax, delivery, and installation costs).
2. Identify the property class and recovery period.
3. Apply the appropriate convention.
4. Use the IRS percentage table or calculate using the declining balance formula.

Example: You purchase a $50,000 piece of machinery (7-year property) on June 15, 2025.

• Year 1 (2025): $50,000 x 14.29% = $7,145
• Year 2 (2026): $50,000 x 24.49% = $12,245
• Year 3 (2027): $50,000 x 17.49% = $8,745
• … and so on through Year 8

Total depreciation over 8 years: $50,000 (the full depreciable basis).

MACRS vs. Section 179 and Bonus Depreciation

MACRS is the baseline, but two provisions let you accelerate deductions beyond the standard schedule:

The typical approach is:

1. Apply Section 179 first (up to the dollar and income limits)
2. Apply bonus depreciation to remaining cost
3. Depreciate the leftover balance using standard MACRS

For detailed guidance on Section 179 and bonus depreciation, see the Section 179 and Bonus Depreciation guide.

Disposing of MACRS Property

When you sell, exchange, or retire a depreciable asset:

• Gain on sale: If you sell for more than the adjusted basis (cost minus accumulated depreciation), the gain attributable to depreciation is recaptured as ordinary income under Section 1245 (for personal property) or at a maximum 25% rate under Section 1250 (for real property). See our capital gains tax strategies guide for ways to manage the tax impact when disposing of appreciated assets.
• Loss on sale: If you sell for less than the adjusted basis, the loss is generally an ordinary loss for business property held more than one year (Section 1231 loss).
• Convention applies: You only get a partial year of depreciation in the year of disposition (half-year, mid-quarter, or mid-month, matching the convention used when the property was placed in service).

Common Mistakes to Avoid

• Depreciating land — Land does not wear out and is never depreciable. Always separate land cost from building cost.
• Wrong property class — Using the wrong recovery period changes every year’s deduction. Verify the asset class in IRS Publication 946 or Revenue Procedure 87-56.
• Forgetting the mid-quarter convention — If you place more than 40% of personal property in service in Q4, you must use mid-quarter for all property that year.
• Missing bonus depreciation — Even at 40% (2025) or 20% (2026), bonus depreciation on top of MACRS can meaningfully accelerate deductions.
• Not depreciating at all — Some business owners forget to claim depreciation on qualifying assets. The IRS reduces your basis regardless of whether you claim the deduction (“allowed or allowable” rule).

Listed Property Rules

“Listed property” includes assets that are commonly used for both business and personal purposes — primarily vehicles and sometimes computers or cell phones. Special rules apply:

• Business use must exceed 50% to use the accelerated MACRS method. Below 50%, you must use ADS straight-line.
• You must keep records documenting business vs. personal use (mileage logs for vehicles). A mileage tracking app that records trips automatically makes it much easier to maintain the contemporaneous records the IRS requires.
• If business use drops to 50% or below after the first year, you must recapture excess depreciation previously claimed.

If you are weighing whether to purchase or lease a business vehicle, the buy vs. lease business car tax comparison breaks down how depreciation limits affect that decision. Vehicles also have annual depreciation caps that limit how much you can deduct regardless of the method you choose.

How sharper.tax Helps

sharper.tax reviews your tax return to verify that business assets are being depreciated using the optimal method and recovery period. We identify assets that may benefit from a cost segregation study, missed bonus depreciation, or Section 179 election. Whether you operate as a sole proprietor or through an LLC, our analysis surfaces depreciation opportunities alongside other self-employed tax strategies — including the home office deduction if you use part of your home for business. Sophisticated tax planning used to require a high-end CPA — we make it available for free.

Related Guides

• Section 179 and Bonus Depreciation — first-year expensing options that work alongside MACRS
• Cost Segregation Studies — how to reclassify building components into shorter recovery periods
• Buy vs. Lease Business Car Tax Comparison — depreciation caps and other factors in the vehicle decision
• Small Business Tax Deductions — the full catalog of deductions available to business owners
• Real Estate Investor Tax Playbook — depreciation strategies in the context of a rental portfolio

Sources

• IRS Publication 946: How to Depreciate Property
• IRS Revenue Procedure 87-56 (Asset Class Lives)
• IRS Form 4562: Depreciation and Amortization
• IRS Publication 463: Travel, Gift, and Car Expenses

The information above is educational and not tax advice.