Depreciation Basics for Small Business Owners

Depreciation basics come down to one idea: when you buy something for your business that will last more than a year — a truck, a laptop, an espresso machine, a building — you generally can't write off the whole cost the year you buy it. Instead, the tax code spreads that cost over a set number of years, called the asset's recovery period. There are ways to speed the deduction up, but the underlying rule doesn't disappear, and there's a catch most owners never hear about: if you sell the asset later, some or all of that depreciation can come back as taxable income.

The core idea: you recover the cost over time, not all at once

A pen, a tank of gas, a month of software — those are ordinary business expenses, deducted in full the year you pay them. A delivery van, a walk-in cooler, an office building — those are capital assets. Because they keep producing value for years, the tax code generally requires you to deduct a portion of the cost each year over the asset's useful life, rather than all at once. That process is depreciation.

The current system is called MACRS — the Modified Accelerated Cost Recovery System. Every depreciable asset is assigned to a class with its own recovery period: vehicles and computer equipment typically fall into a 5-year class, office furniture and most equipment into a 7-year class, while a building is depreciated over a much longer period measured in decades. Which class an asset falls into is a matter of IRS asset-classification tables, not something to guess — IRS Publication 946, "How To Depreciate Property," lays out the classes and the tables.

Land is never depreciable

If your capital purchase is real estate, only the building (and certain land improvements, like paving or fencing) can be depreciated. The land itself never wears out in the eyes of the tax code — you have to allocate the purchase price between land and building, usually based on relative fair market value, and only the building portion enters the depreciation calculation.

The accelerators: Section 179, bonus depreciation, and the de minimis safe harbor

Three provisions let many small businesses deduct some or all of an asset's cost faster than the standard MACRS schedule allows. Worth knowing what each one is — though none of them is free money (more on that below):

• Section 179 expensing lets an eligible business elect to deduct the full cost of qualifying equipment in the year it's placed in service, instead of depreciating it over years. It has its own dollar cap, it phases out once purchases for the year get large, and it's limited to your business's taxable income — you can't use it to create a loss. The cap and the phase-out threshold adjust over time, so confirm the current year's figures at irs.gov. Section 179 has its own detailed guide on this site; this piece focuses on how it fits into the bigger depreciation picture.
• Bonus depreciation (the "additional first-year depreciation deduction") is a separate provision letting a business deduct a percentage of an eligible asset's cost upfront. That percentage is set by Congress, not the IRS, and has been changed by legislation more than once — including a scheduled phase-down that later legislation reversed for property acquired after a specific cutoff date. Because the applicable percentage turns on exactly when the asset was acquired and when it was placed in service — and assets on either side of a cutoff can be treated differently in the same tax year — confirm the current rate and effective dates at irs.gov before you file, rather than relying on a percentage you read somewhere, including here.
• The de minimis safe harbor lets a business with a qualifying accounting policy simply expense smaller purchases — below a per-item or per-invoice dollar threshold — instead of tracking them as depreciable assets. It spares small businesses from depreciating an inexpensive printer or tool for years. The threshold and the policy requirement are set by IRS regulation and depend on whether your business has an applicable financial statement (an audited financial statement, roughly — most small businesses don't). Businesses with one must have written accounting procedures and get a higher threshold; businesses without one are not required to put the policy in writing, but must have a consistent policy in place at the beginning of the tax year and follow it on their books. Putting it in writing anyway is cheap insurance. Confirm the current thresholds and requirements at irs.gov.

All three are timing tools. They change when you get the deduction, not whether the asset's cost is still tied up in something you own and use in the business.

Listed property and the business-use percentage

Some assets are commonly used for both business and personal purposes, and the tax code singles out certain categories as listed property — passenger automobiles and other property used for transportation are the classic examples. For listed property you can only depreciate (or expense) the business-use percentage of the cost, and you need records — mileage or usage logs — to support that percentage. Guessing at a percentage, or claiming an unrealistic share of business use, is a common audit flag.

One point worth correcting, because the old rule is still repeated everywhere: computers and peripheral equipment are no longer listed property. The 2017 tax law removed them, so a laptop used partly at home isn't subject to the strict listed-property substantiation regime anymore. You still can only depreciate the business-use share of a computer you also use personally — that part hasn't changed — but the heightened listed-property rules no longer apply to it. Publication 946 has the current definition.

The part most owners never hear about: depreciation recapture

This is the piece that catches people off guard. Depreciation is not a permanent tax savings — it's a timing benefit. Every dollar of depreciation you deduct (or were allowed to deduct, whether you claimed it or not) reduces your tax basis in the asset. When you later sell it, the gain is measured against that reduced basis — which is why a fully depreciated machine you sell for anything at all produces gain.

For most business equipment, the rule is Internal Revenue Code Section 1245: on a sale, the portion of the gain that represents depreciation you took is generally taxed back as ordinary income, not as a capital gain, no matter how the rest of the sale is taxed. Real property runs on Section 1250, and the mechanics genuinely differ: because buildings are depreciated on a straight-line basis under MACRS, Section 1250 ordinary-income recapture is often little or nothing, but the depreciation you took instead generally becomes unrecaptured Section 1250 gain, taxed at its own special maximum rate that is higher than the usual long-term capital gains rate. That is a real bill, just a different one — and it's a good reason not to assume a building sale is "just capital gains." Confirm how it applies at irs.gov or with a CPA before you sign anything.

A simple way to think about it: depreciation lets you deduct the cost now and settle up later if the asset is worth more than its depreciated value when you part with it. This is true even if you never claimed depreciation you were entitled to — basis and recapture are based on what was "allowed or allowable," so skipping the deduction just means you lose it without avoiding the consequence. That's a good reason to actually claim depreciation you're entitled to, and to keep the schedule your tax preparer generates for every asset.

Beyond an outright sale

Two situations trip up owners who never sold anything:

Business use dropping, or converting an asset to personal use. Be careful here, because the rule is narrower than it's usually described. If you took Section 179 expensing or accelerated depreciation on listed property, and business use later falls to 50% or less — including if you convert the asset to purely personal use — you generally must recapture part of what you deducted, adding it back to income in that year. But for ordinary MACRS property you simply depreciated on the normal schedule, converting it to personal use is not itself a recapture event. You stop depreciating it, and the reduced basis follows the asset, so the depreciation resurfaces only if and when you sell it. Which bucket you're in depends on what you elected years ago — which is exactly why the depreciation schedule matters.

Selling a home that had a depreciated home office. The gain exclusion on the sale of a primary residence does not shelter the part of the gain equal to the home-office depreciation you were allowed. That depreciation is generally still taxed when you sell the house, even though the rest of the gain may be excluded. This bites only if you claimed actual depreciation — the simplified home-office method includes no depreciation deduction, so it creates nothing to recapture. If you used actual depreciation, plan for this before you sell, and talk to a tax professional. IRS Publication 523 covers the home-sale side.

What to do

1. Track capital purchases separately from ordinary expenses. Keep the invoice, the date placed in service, and the business-use percentage for anything that will last more than a year.
2. Ask your tax preparer (or IRS Publication 946) which asset class each purchase falls into so you know the standard recovery period before deciding whether to accelerate it.
3. Decide deliberately whether to use Section 179, bonus depreciation, the de minimis safe harbor, or standard MACRS for each asset — the best choice depends on your income for the year, not just the asset itself. And if you want the de minimis safe harbor, get your accounting policy in place at the start of the year; it isn't something you can bolt on at filing time.
4. Keep a depreciation schedule (most tax software and every CPA maintains one) so you always know an asset's current basis, and what you elected, if you sell it, trade it in, or stop using it in the business.
5. Before you sell a depreciated business asset — including a home with a depreciated home office — ask what recapture will look like so the tax bill isn't a surprise. A large gain can also affect what you owe in estimated tax; due dates and safe-harbor rules vary by situation, so confirm current dates at irs.gov.

Depreciation choices also affect your net business income, which flows into your self-employment tax and your qualified business income deduction — rarely a decision to make in isolation. If you're new to how property purchases interact with the home office deduction or with Section 179, those have their own dedicated guides on this site; this article fills in the framework underneath them. The IRS and SBA both offer free help, and SCORE and your state's Small Business Development Center will talk through a purchase decision with you at no cost.

Frequently asked questions

Do I have to depreciate an asset, or can I just skip it?

You're generally required to depreciate business property rather than deduct the full cost immediately, unless a specific provision (Section 179, bonus depreciation, or the de minimis safe harbor) applies and you elect to use it. Skipping depreciation you were entitled to doesn't help later — basis and recapture are figured on what was "allowed or allowable," so you're treated as having taken it either way.

Is depreciation recapture taxed at the same rate as my regular income?

On most business equipment, recaptured depreciation is generally taxed as ordinary income under Section 1245. Real property works differently: much of it comes back as unrecaptured Section 1250 gain, which has its own special maximum rate — higher than the ordinary long-term capital gains rate, but not necessarily your ordinary income rate. It's technical enough to be worth having a CPA run the numbers before a sale, not after.

Can I depreciate my personal car if I use it for business sometimes?

Only the business-use percentage, supported by a mileage log — passenger vehicles are listed property and have their own rules and caps. Many self-employed people find the standard mileage rate simpler than tracking actual depreciation. Worth knowing: the standard mileage rate has a depreciation component built into it, which still reduces your basis in the car, so it doesn't make the recapture question disappear. Confirm the current rules and rate at irs.gov.

What happens to depreciation if I stop using something for business?

It depends on what you deducted. If you took Section 179 or accelerated depreciation on listed property and business use drops to 50% or less, you generally recapture part of the deduction that year. If you just depreciated the asset on the normal MACRS schedule, converting it to personal use isn't itself a taxable event — you stop depreciating, but the lowered basis stays with the asset and matters if you sell it later. Check your depreciation schedule to see which applies.

Does the de minimis safe harbor mean I never have to worry about depreciation on small purchases?

It lets qualifying purchases be expensed instead of depreciated, simplifying recordkeeping for those items — but it has a dollar threshold set by IRS regulation and requires an accounting policy that's already in place at the beginning of the tax year. Businesses with an audited financial statement must have that policy in writing and get a higher threshold; businesses without one aren't required to write it down, though it's smart to. Confirm the current threshold and requirements at irs.gov.

This article is general business and tax information, not legal, tax, or financial advice, and using it doesn't create an attorney-client or accountant-client relationship. Depreciation rules, dollar thresholds, and percentages change by legislation and by year — confirm current figures and how they apply to your situation at irs.gov, or with a qualified CPA or tax attorney.