Depreciation and Amortization: Know the Differences and Why They Matter to You

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If you own a vehicle, you probably know “depreciation” as that evil force that makes your car start losing value the moment you drive it off the lot. If you have a mortgage — or any other loan, for that matter — you probably associate “amortization” with the payment schedule for the loan’s principal and interest. 

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But both words have alternate definitions that are important to business owners come tax time. If you’re thinking of starting a business — even if it’s a part-time side hustle — you’ll want to get to know these words all over again. That’s because they represent the primary ways of expensing your assets to lower your tax bills — and smaller tax bills are good for business.  

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How Do You Expense Assets? Well, That Depends on the Asset

The IRS allows businesses to deduct a portion of many of their operating expenses — including their assets — which reduces their taxable revenue and lowers their tax obligation. When a company spends money to acquire assets that are necessary to its operation, it can expense those assets through either the process of amortization or depreciation.

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So, how do you know which method to use? Well, if you can see and touch the assets, you should use depreciation. If you can’t, then amortization it is. 

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Use Depreciation To Expense Tangible Assets

The IRS defines depreciation, which is used to expense tangible assets, as “an income tax deduction that allows a taxpayer to recover the cost or other basis of certain property. It is an annual allowance for the wear and tear, deterioration, or obsolescence of the property.”

Tangible assets are physical objects like an oven in a restaurant or styling chairs in a salon. In fact, just about any tangible asset that is necessary to the business’ operation can be depreciated, including:

  • Equipment
  • Machinery
  • Buildings
  • Furniture
  • Vehicles

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How Do I Know If My Business’ Assets Qualify?

In some cases, properties can receive a depreciation deduction, but they have to meet several criteria outlined by the IRS. Land can never be depreciated.

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In order for all other tangible assets to be eligible for depreciation:

  • You have to own the asset.
  • You must use the asset as part of your business.
  • The asset has to have an expected life of more than one year.
  • The asset has to have a “determinable useful life.”

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Expense Intangible Assets With Amortization

Intangible assets are assets that a business paid to acquire and that are necessary to the business’ operations, but that aren’t physical items. They include things like:

  • Patents
  • Copyrights
  • Research
  • Analyses, surveys and other startup costs
  • Franchise agreements

Like depreciation, amortization involves writing off an asset’s initial cost over the course of the asset’s useful life. In this case, the asset’s value is divided equally by the number of years the business will own it.

For example, let’s say a business spends $7,000 to secure a patent and the patent is good for seven years. Amortized over the life of the patent, the patent loses $1,000 in value every year. $1,000, then, is the amount that can be deducted annually. 

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Learn: Why Inflation’s 6% Cost-of-Living Increase to Social Security Could Be a Double-Edged Sword

Understanding the Straight-Line Basis

The method of dividing an asset’s value evenly over its lifespan is called the straight-line basis, which is almost always the process used to calculate amortization. The straight-line basis is sometimes, but not always, used to calculate depreciation, which is why the IRS states that “certain intangible property, such as patents, copyrights, and computer software is depreciable.” The difference is that tangible assets have what’s called a salvage value, like a car stripped for its parts. Intangible assets do not.

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Last updated: Oct. 19, 2021 

About the Author

Andrew Lisa has been writing professionally since 2001. An award-winning writer, Andrew was formerly one of the youngest nationally distributed columnists for the largest newspaper syndicate in the country, the Gannett News Service. He worked as the business section editor for amNewYork, the most widely distributed newspaper in Manhattan, and worked as a copy editor for, a financial publication in the heart of Wall Street's investment community in New York City.

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