4.2 Depreciation Basics

Learning Objectives

By the end of this section, you will be able to:

Suppose you buy a laptop for your freelance design business in March. You paid for it once, in one payment, so it feels like one expense. The tax law does not see it that way. If property you acquire to use in your business is expected to last more than 1 year, you generally cannot deduct the entire cost as a business expense in the year you acquire it. You must spread the cost over more than 1 tax year and deduct part of it each year on Schedule C (Form 1040). This method of deducting the cost of business property is called depreciation.

Depreciation is the method of deducting the cost of business property that is expected to last more than 1 year, by spreading that cost over more than 1 tax year and deducting part of it each year on Schedule C (Form 1040).

What follows is a brief overview. You will find more information about depreciation in Pub. 946.

What property can be depreciated? Not every dollar you spend on the business gets this treatment. Property has to clear a checklist first, and the checklist is short enough to memorize. You can depreciate property if it meets all of the following requirements.

Property qualifies as depreciable property only if it meets all of the following requirements:

• It must be property you own.
• It must be used in business or held to produce income.
• It must have a useful life that extends substantially beyond the year it is placed in service.
• It must have a determinable useful life, which means that it must be something that wears out, decays, gets used up, becomes obsolete, or loses its value from natural causes.
• It must not be excepted property.

Take those one at a time, because each one is a trap for somebody.

You must own it. Depreciation is a deduction for the person who put capital into the asset. If you rent your studio space, the landlord depreciates the building; you deduct rent.

It must be used in business or held to produce income. You can never depreciate inventory (explained in chapter 2) because it is not held for use in your business. Inventory is held for sale. A bookseller's shelves are depreciable; the books stacked on them for customers to buy are not.

Its useful life must extend substantially beyond the year it is placed in service. "Placed in service" means the property is ready and available for its assigned job — not the day you ordered it, and not the day it first earns money. A dough mixer delivered and plugged in on December 20 is placed in service in December, even if the bakery does not open until January.

Its useful life must be determinable. The asset has to wear out, decay, get used up, become obsolete, or lose value from natural causes. You can never depreciate the cost of land because land does not wear out, become obsolete, or get used up. This is the single most common error on a small business return: a sole proprietor buys a $260,000 property, and the whole price lands in the depreciation schedule when only the building portion belongs there.

It must not be excepted property. This includes property placed in service and disposed of in the same year. Buy a used trailer in April and sell it in October, and there is no depreciation on it at all — the asset never lived through a full slice of the allocation the way depreciation assumes.

Repairs. In general, you do not depreciate the costs of repairs or maintenance if they do not improve your property. Instead, you deduct these amounts on line 21 of Schedule C (Form 1040). Improvements are amounts paid for betterments to your property, restorations of your property, or work that adapts your property to a new or different use.

Election to capitalize repair and maintenance costs that do not improve your property. You can make an election to treat certain repairs or replacements in your trade or business as improvements subject to depreciation. This election is available if you treat these amounts as capital expenditures on your books and records regularly used in computing your income and expenses. In plain terms: if your own accounting records already treat the cost as a long-term asset, the tax law will let you line up with your books instead of forcing a mismatch. The condition is doing real work there. You cannot pick whichever answer produces the bigger deduction this April and then keep the opposite treatment in your bookkeeping software — the election only exists for people whose regular books already capitalized the cost. So the practical order of operations is: decide how the cost is recorded in your books first, then let the return follow. The exercise below walks the same checklist in the other direction, starting from a pile of receipts and asking which ones ever reach a depreciation schedule at all.

Depreciation method. Once you know an asset is depreciable, you need a system that says how much comes off each year. The method for depreciating most business and investment property placed in service after 1986 is called the Modified Accelerated Cost Recovery System (MACRS). MACRS is discussed in detail in Pub. 946. For now, the thing to hold on to is that MACRS is the default system the IRS expects for most business property, and it front-loads deductions into the early years of an asset's life rather than spreading them evenly.

Section 179 deduction. There is also a way to skip the waiting entirely on some purchases. You can elect to deduct a limited amount of the cost of certain depreciable property in the year you place the property in service. This deduction is known as the section 179 deduction. The maximum amount you can elect to deduct during 2025 is generally $2,500,000.

This limit is generally reduced by the amount by which the cost of the property placed in service during the tax year exceeds $4,000,000. The total amount of depreciation (including the section 179 deduction) you can take for a passenger automobile you use in your business and first place in service in 2025 is $12,200 ($20,200 if you take the special depreciation allowance for qualified passenger automobiles placed in service in 2025). Special rules apply to trucks and vans. For more information, see Pub. 946. It explains what property qualifies for the deduction, what limits apply to the deduction, and when and how to recapture the deduction.

Vehicles get their own ceiling on top of everything else. Your section 179 election for the cost of any sport utility vehicle (SUV) and certain other vehicles is limited to $31,300. For more information, see the Instructions for Form 4562 or Pub. 946.

Listed property. You must follow special rules and recordkeeping requirements when depreciating listed property. Listed property includes any of the following.

• Most passenger automobiles.
• Most other property used for transportation.
• Any property of a type generally used for entertainment, recreation, or amusement.

For more information about listed property, see Pub. 946. The common thread is that these are the assets a person could easily use for fun on the weekend, so the law asks you to keep records proving how much of the use was really for business.

Form 4562. Use Form 4562, Depreciation and Amortization, if you are claiming any of the following.

• Depreciation on property placed in service during the current tax year.
• A section 179 deduction.
• Depreciation on any listed property (regardless of when it was placed in service).

Notice the third one. Listed property drags Form 4562 into your return no matter how old the asset is — a camera you placed in service four years ago still puts the form on this year's filing if you are depreciating it.

Summary of the 2025 section 179 dollar limits. The table below collects the figures introduced above for quick reference.

4.2.1 Straight-Line Depreciation

Start with a case where the answer is obvious, then change one thing and watch how little the accounting changes.

Suppose a company pays $600,000 on January 1, Year One to rent a building to serve as a store for five years. A prepaid rent account (an asset) is established for that amount. Because the rented facility is used to generate revenues throughout this period, a portion of the cost is reclassified annually as expense to comply with the matching principle — the idea that the cost of using something up should land in the same year as the revenue it helped produce. At the end of Year One, $120,000 (or one-fifth) of the cost is moved from the asset balance into rent expense by means of an adjusting entry. Prepaid rent shown on the balance sheet drops to $480,000, the amount paid for the four remaining years. The same adjustment is required for each of the subsequent years as the time passes.

If, instead, the company buys a building with an expected five-year life for $600,000, the accounting is quite similar. (Estimated lives of property and equipment vary widely. In notes to its financial statements as of January 31, 2011, and for the year then ended, Walmart disclosed that the expected lives of its buildings and improvements ranged from three years to forty.) The initial cost is capitalized to reflect the future economic benefit. Once again, at the end of each year, a portion of this cost is assigned to expense to satisfy the matching principle. This expense is referred to as depreciation. It is the cost of a long-lived asset that is recorded as expense each period.

So here is the question worth stopping on. Should the Year One depreciation recognized on this building also be $120,000, one-fifth of the total cost, exactly as it was for the rent? And more generally, how is the annual amount of depreciation expense determined for reporting purposes?

Depreciation is based on a mathematically derived system that allocates the asset's cost to expense over the expected years of use. It does not mirror the actual loss of value over that period. That sentence is doing a lot of work: your delivery van might lose 30% of its market value the day you drive it off the lot, and depreciation will pay no attention whatsoever. The schedule is an allocation of cost, not an appraisal.

The specific amount of depreciation expense recorded each year for buildings, machinery, furniture, and the like is determined using four variables:

1. The historical cost of the asset
2. Its expected useful life
3. Any residual (or salvage) value anticipated at the end of the expected useful life
4. An allocation pattern

After total cost is computed, officials estimate the useful life based on company experience with similar assets or on other sources of information such as guidelines provided by the manufacturer. (As noted above, land does not have a finite life and is therefore not subjected to the recording of depreciation expense.) In a similar fashion, officials arrive at the expected residual value — an estimate of the likely worth of the asset at the end of its useful life. Both life expectancy and residual value can be no more than guesses.

That last point is worth sitting with, because it explains why two honest accountants can produce different depreciation numbers for the same machine. Two of the four variables are estimates made by people. U.S. GAAP does not require any specific computational method for determining the annual allocation of the asset's cost to expense. Over fifty years ago, the Committee on Accounting Procedure (the authoritative body at the time) issued Accounting Research Bulletin 43, which stated that any method could be used to determine annual depreciation if it provided an expense in a "systematic and rational manner." This guidance remains in effect today.

Consequently, a vast majority of reporting companies (including Walmart) have chosen to adopt the straight-line method to assign the cost of property and equipment to expense over their useful lives. The estimated residual value is subtracted from cost to arrive at the asset's depreciable base. This figure is then expensed evenly over the expected life. It is systematic and rational.

The straight-line method allocates an equal expense to each period in which the asset is used to generate revenue. The estimated residual value is subtracted from cost to arrive at the depreciable base, and that base is expensed evenly over the expected useful life:

Written as a single chain, the method reads: (cost – estimated residual value) = depreciable base, and then depreciable base / expected useful life = annual depreciation. Both steps matter and they happen in that order. Subtract first, divide second. Reversing them, or forgetting the subtraction entirely, is the mistake that shows up most often when someone works one of these by hand for the first time. It also helps to write down all four variables before touching a calculator, because three of them are given to you in the problem and the fourth — the allocation pattern — is the choice to use straight-line at all. With those four values on paper, the arithmetic is two operations and there is nothing left to guess.

4.2.2 Conceptual Overview of the Section 179 Election

Everything above assumed the cost goes on a schedule. There is a doorway out for small purchases, and most sole proprietors walk through it every year without thinking about it.

Generally, you must capitalize costs to acquire or produce real or tangible personal property used in your trade or business such as buildings, equipment, or furniture. However, if you elect to use the de minimis safe harbor for tangible property, you may deduct de minimis amounts paid to acquire or produce certain tangible property if these amounts are deducted by you for financial accounting purposes or in keeping your books and records.

The size of the doorway depends on one thing: whether you have an applicable financial statement — broadly, a formal financial statement of the kind a business produces for outside users rather than a spreadsheet kept on a laptop.

The de minimis safe harbor for tangible property is an election that lets you deduct, rather than capitalize, small amounts paid to acquire or produce certain tangible property, provided you also deduct those amounts for financial accounting purposes or in keeping your books and records. The per-item or per-invoice ceiling is:

• $5,000 if you have an applicable financial statement;
• $2,500 if you do not have an applicable financial statement.

Read the ceiling carefully — it is per item or per invoice, not per year. A freelancer without an applicable financial statement who buys four $900 monitors on one invoice is looking at four items of $900 each, and each one sits under the $2,500 line.

Amounts qualifying under this de minimis safe harbor should be included as other expenses in Part V of Schedule C (Form 1040). That placement matters: these costs never reach the depreciation schedule at all, so they never appear on Form 4562 either.

More information. For details on making this election and requirements for using the de minimis safe harbor for tangible property, see IRS.gov/Tangible-Property-Regulations.

Problem Set 4.2

Key Terms