Understanding MACRS Depreciation

The Modified Accelerated Cost Recovery System (MACRS) is the current tax depreciation system in the United States.

What is MACRS?

Introduced in 1986, MACRS allows businesses to recover the cost basis of certain property through depreciation deductions. It typically allows for faster depreciation in the early years of an asset's life compared to the straight-line method.

Key Components of MACRS

Asset Class

Determines the "Recovery Period" or useful life (e.g., 3, 5, 7, 27.5 years).

Depreciation Method

GDS (General Depreciation System) is most common, typically using 200% or 150% declining balance switching to straight line.

Convention

Rules for when recovery period begins (e.g., Half-Year, Mid-Quarter, Mid-Month).

Common Property Classes (GDS)

Class Life	Common Examples
3-Year	Tractor units for over-the-road use, race horses > 2 years old.
5-Year	Automobiles, taxis, buses, trucks, computers, office machinery.
7-Year	Office furniture and fixtures, agricultural machinery.
27.5-Year	Residential rental property.
39-Year	Non-residential real property.

How to Calculate

While you can calculate it manually using formulas, the IRS provides percentage tables (e.g., Rev. Proc. 87-57) which simplify the process. Our MACRS Calculator uses these standard GDS Half-Year convention tables.

Example: 5-Year Property

For an asset costing $10,000:

Year 1 (20%): $2,000 deduction
Year 2 (32%): $3,200 deduction
Year 3 (19.2%): $1,920 deduction
...and so on until fully depreciated.