MACRS is the main federal tax depreciation system. Learn property classes, GDS and ADS, methods, conventions, bonus depreciation, and California differences.
The Modified Accelerated Cost Recovery System, or MACRS, is the principal federal income-tax system for depreciating most tangible property placed in service after 1986. MACRS assigns property to a class and combines a recovery period, depreciation method, and convention to determine when depreciable basis is deducted.
MACRS is not one flat percentage. Two businesses can purchase assets for the same price and receive different first-year deductions because the assets have different classifications, in-service dates, conventions, business-use percentages, or elections.
The IRS percentage tables combine these inputs for common situations, but a table is only correct after the classification and convention are correct.
MACRS contains the General Depreciation System (GDS) and Alternative Depreciation System (ADS). GDS is used for most property and generally provides faster deductions for qualifying personal property. ADS usually requires straight line and can use longer recovery periods.
ADS is required for specified categories and elections. Examples can include certain property used predominantly outside the United States, tax-exempt-use property, tax-exempt-bond-financed property, and property affected by elections for real property or farming trades or businesses. The exact rule should be verified for the asset and year.
Coastal Design LLC places a $42,000 qualifying machine in service during the year. The business estimates a six-year book useful life, but the machine is five-year GDS property for federal tax purposes.
| Depreciation approach | Year-one amount | Basis |
|---|---|---|
| Book straight line (6-yr useful life) | $7,000 | Full-year assumption |
| Federal GDS MACRS (5-yr, 200% DB, half-year) | $8,400 | 20% × $42,000 |
| Federal 100% bonus depreciation (if eligible) | $42,000 | Full basis, year one |
| California (bonus nonconformity) | Separate schedule | State basis maintained |
The 20% first-year GDS example assumes full business use, no basis adjustments, no automobile or listed-property limits, no Section 179, no bonus depreciation, and no mid-quarter convention. If 100% bonus depreciation applies and Coastal does not elect out, eligible federal basis may instead be deducted in the first year. California would still require a separate calculation.
The typical ordering is Section 179 first, then bonus depreciation, then regular MACRS on the remaining basis. Each provision has its own eligibility, limitations, elections, and consequences.
Section 179 is generally elective and subject to taxable-income and investment limits. Bonus depreciation generally applies automatically to eligible property unless a timely election out is made for a class of property. Regular MACRS then recovers basis left after these deductions. The result should be documented on Form 4562 and an asset-level schedule.
Land is not depreciable. Certain intangible property is amortized rather than depreciated. Inventory and property held primarily for sale are recovered through cost-of-goods rules rather than MACRS. Property placed in service before MACRS and property excluded by statute can follow other systems.
Leased property, improvements, mixed-use property, listed property, vehicles, and real estate require additional analysis. The fact that an item appears in a fixed-asset account does not prove that one particular MACRS class applies.
When property is sold or otherwise disposed of, depreciation stops under the applicable convention. Adjusted tax basis generally reflects depreciation allowed or allowable, not only the amount the taxpayer remembers claiming. Gain can be subject to depreciation-recapture rules depending on the property and transaction.
This makes accurate schedules important even after an asset is fully depreciated. A current-year deduction decision can change later gain character and basis.
California follows its own conformity rules and does not conform to federal bonus depreciation. It also differs from federal law in certain Section 179 limits, vehicle limitations, and other depreciation provisions. An asset can therefore have a book value, federal adjusted basis, and California adjusted basis at the same date.
Do not force the general ledger to equal one tax schedule. Maintain reconciliation workpapers and use the applicable FTB form and return adjustment for the entity.
Heath Income Tax can help businesses classify fixed assets and reconcile book, federal MACRS, and California depreciation.
Is MACRS always accelerated?
No. MACRS includes accelerated methods, but real property and ADS commonly use straight line.
Is MACRS the same as bonus depreciation?
No. Bonus depreciation is an additional first-year deduction for eligible property. MACRS governs regular depreciation of remaining basis.
Where is MACRS reported?
Form 4562 is commonly used to report depreciation and elections, with totals flowing to the applicable business, rental, farm, or entity return.
The definitions and examples on this page are for informational purposes only and do not constitute tax advice. Tax laws change frequently and individual circumstances vary. Consult a qualified tax professional before making decisions based on this content.
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