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MACRS Depreciation

The Modified Accelerated Cost Recovery System (MACRS) is the primary depreciation method for tax purposes, assigning assets to recovery periods with prescribed depreciation methods and conventions.

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Explanation

MACRS uses the General Depreciation System (GDS) with recovery periods of 3, 5, 7, 10, 15, 20, 27.5, or 39 years. Most personal property uses 200% declining balance switching to straight-line, while nonresidential real property uses straight-line over 39 years. Conventions (half-year, mid-quarter, mid-month) determine the depreciation in the placed-in-service and disposal years. Section 179 allows immediate expensing up to annual limits, and bonus depreciation may allow 100% first-year deductions.

Key Points

  • Recovery periods: 5-year (autos, computers), 7-year (furniture, equipment), 39-year (commercial buildings)
  • Half-year convention is default; mid-quarter applies if >40% placed in service in Q4
  • Section 179 and bonus depreciation can accelerate deductions significantly

Exam Tip

The mid-quarter convention is triggered when more than 40% of personal property is placed in service during the last quarter of the tax year.

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