MACRS Depreciation Explained: How the IRS Lets You Write Off Assets

What MACRS is and why it exists

MACRS is the IRS system that tells you how many years to depreciate a business asset and how much to deduct each year. It applies to most tangible property placed in service after 1986.

When you buy a truck, an oven or a machine, you do not deduct the whole price the day you pay. The asset helps earn money for years, so tax rules spread the deduction over that time. MACRS sets the schedule.

The word accelerated matters. MACRS front-loads the deduction, so you write off more in year one than in year five. That matches how many assets lose value and gives you tax savings sooner. You report the deduction on IRS Form 4562, usually prepared by your accountant or tax software.

MACRS is a tax method. Your books may use a different method for financial reporting, which is why a business can show two different depreciation numbers. If you want the basics first, read what depreciation is.

Property classes: how long an asset is written off

MACRS assigns each asset to a class with a fixed recovery period, such as 5 years for many vehicles and computers or 7 years for most office furniture and machinery.

You do not choose the number of years. The IRS assigns it by asset type. Common general depreciation system classes include:

Land itself is never depreciated. Classification can be tricky, so check IRS Publication 946 or ask your accountant if an asset is unusual.

Conventions: when the clock starts

The convention decides how much of the first year counts. The half-year convention is the default, treating assets as placed in service at mid-year no matter when you bought them.

Under the half-year convention, a 5-year asset is depreciated across six tax years: a half year at the start and a half year at the end. This is why a machine bought in December gets a full half-year of deduction in its first year.

There is an exception. If more than 40 percent of the year's depreciable property is placed in service in the last three months, the mid-quarter convention applies, which can reduce the first-year deduction. Buildings use a mid-month convention.

This is one reason timing matters when you plan a purchase. Talk with your accountant before the end of the year, not after.

A worked example with round numbers

A $50,000 machine in the 7-year class would be written off over eight tax years, with the largest deductions in years two through four.

Here is an illustrative example. You buy a $50,000 machine, classified as 7-year property, and use the half-year convention with the declining-balance schedule. The IRS tables give percentages for each year. In round terms:

• Year 1: about 14 percent, or roughly $7,100
• Year 2: about 25 percent, or roughly $12,500
• Year 3: about 17 percent, or roughly $8,900
• Years 4 to 8: the remainder, shrinking each year

These percentages come from IRS tables, so use the current ones for real filings. The point is the shape: the biggest deductions arrive early, and the total across all years equals the cost of the asset.

If you are in a 25 percent combined tax bracket, a $7,100 deduction saves about $1,775 of tax in year one. Compare that to the $50,000 you spent. Depreciation softens the purchase, but it does not make it free.

MACRS versus Section 179 and bonus depreciation

Section 179 and bonus depreciation can let you deduct much more of an asset in the first year, instead of spreading it out under regular MACRS.

Two accelerated options sit on top of MACRS. Section 179 lets you elect to expense qualifying property in the year it goes into service, up to annual limits. Bonus depreciation allows an additional first-year deduction on eligible property, and the percentage has changed over time.

Limits, phase-outs and eligible property change with tax law, so check IRS.gov or ask your accountant for current rules before you rely on either one. Do not buy equipment only for the deduction. A write-off reduces tax on money you already spent. It never earns back the full price.

Both elections also require that the business have taxable income to absorb the deduction, in most cases. A new or low-profit business may be better off with regular MACRS spread over time.

GDS versus ADS and straight-line options

Most businesses use the General Depreciation System. The Alternative Depreciation System uses longer lives and straight-line deductions, and some situations require it.

The General Depreciation System (GDS) is the default. The Alternative Depreciation System (ADS) spreads deductions over longer periods using straight-line math. ADS is required for some assets, such as property used mostly outside the U.S. or certain tax-exempt use property. You may also elect it voluntarily for a class of property.

You can also choose straight-line within GDS for a class of property. That gives smaller early deductions but steadier ones. Some owners choose it when they expect higher income in later years and want deductions then. If you want to compare approaches, our article on the units of production method shows a usage-based alternative used for financial statements.

How depreciation connects to financing and cash flow

Depreciation is a non-cash deduction. It lowers taxable income but does not produce cash, so a financed purchase still needs payments you can afford.

Many owners confuse the tax benefit with cash. A $50,000 machine financed over five years creates monthly payments no matter how fast you depreciate it. The deduction helps at tax time. The payment arrives every month.

Start with what the asset will earn. If the machine adds $2,500 per month in profit and the payment is $1,000, the math works with or without the tax benefit. If it adds $800 per month, depreciation will not rescue the decision. Our equipment payback period calculator walks through that test.

When you are ready to buy, equipment financing through ROI Funder typically funds in 2 to 7 days, and the equipment can serve as part of the structure. ROI Funder considers 500+ FICO, 6+ months in business and $20,000+ monthly revenue. Applying takes a few minutes with a soft credit pull.