What Is Depreciation? Small Business Tax Guide 2026

What Is Depreciation?

Depreciation is how businesses spread the cost of a long-lasting asset — a laptop, a vehicle, machinery — over the years they use it, instead of deducting the whole cost at once. Buy a $3,000 computer expected to last three years, and depreciation lets you recognize roughly $1,000 of cost per year. The logic: the asset helps you earn revenue across multiple years, so its cost should be matched to those years.

Depreciation affects both your books and your taxes, though not always the same way. This article is general information, not tax advice — depreciation rules have elections, limits, and exceptions, so consult a tax professional before filing. To estimate your overall liability first, try our free Tax Calculator.

Why Not Just Deduct the Whole Thing?

For small purchases, you often can — many businesses expense items under a de minimis threshold immediately. But for significant assets, accounting rules (and tax law) require capitalization: the purchase goes on the balance sheet as an asset, then depreciation moves portions of it to the P&L as expense each year. This prevents a $30,000 equipment purchase from making one year look disastrous and the next three look artificially brilliant.

There is also a policy reason: depreciation approximates economic reality. A delivery van genuinely loses value each year it works — depreciation records that wear and tear as a cost of doing business.

Straight-Line Depreciation: The Default Method

The simplest and most common method spreads cost evenly:

Salvage value is what you expect the asset to be worth at the end (often zero for small business equipment). Useful life is how long you'll use it — tax rules assign standard lives to asset classes (for example, computers are typically 5-year property, office furniture 7-year).

Worked Example: Depreciating a Laptop

You buy a $3,000 laptop for your freelance business, expect zero salvage value, and use a 3-year life for your books:

Year	Depreciation Expense	Book Value Remaining
1	$1,000	$2,000
2	$1,000	$1,000
3	$1,000	$0

Each year, $1,000 of depreciation expense reduces your taxable profit — at a 22% marginal rate, that's about $220 of tax saved per year. Note the cash reality: you spent $3,000 in year 1 but deduct it across three years. Depreciation is a non-cash expense after the purchase year — it reduces taxable income without reducing your bank balance. If you're pricing freelance work to cover asset costs like this, our Freelance Rate Calculator builds equipment costs into your rate.

Section 179 and Bonus Depreciation: Deducting More Upfront

Tax law offers elections that accelerate depreciation — letting you deduct much or all of an asset's cost in the purchase year:

• Section 179: lets qualifying businesses expense the full cost of eligible equipment up to an annual limit, instead of depreciating it. Limits and phase-outs change, so check the current year's figures.
• Bonus depreciation: has allowed additional first-year deductions on new (and sometimes used) assets; the percentage has been phasing down under recent law.
• The tradeoff: deducting everything now means bigger tax savings today but no depreciation deductions later — and if you sell the asset, depreciation recapture rules may tax some of the gain.

Whether to accelerate or spread deductions depends on your current vs. expected future tax rates — exactly the kind of decision a tax professional earns their fee on.

Depreciation vs. Amortization vs. Depletion

Three siblings, one idea — spreading costs over time — applied to different assets:

Term	Applies To	Example
Depreciation	Tangible physical assets	Laptops, vehicles, machinery
Amortization	Intangible assets	Patents, software licenses, goodwill
Depletion	Natural resources	Timber, minerals, oil reserves

For most small businesses, only depreciation and amortization matter — and amortization mostly appears if you've bought another business or capitalized software development. The mechanics are identical (cost spread over useful life); only the asset type differs. When your accountant says "D&A" on the cash flow statement, this trio is what they mean.

Common Depreciation Mistakes

• Depreciating land: land doesn't wear out and is never depreciable — only the building on it.
• Forgetting placed-in-service date: depreciation starts when the asset is ready for use, not when you pay for it.
• Mixing personal and business use: only the business-use percentage of a mixed-use asset (like a car) is depreciable — keep a mileage or usage log.
• Ignoring recapture: sell a depreciated asset for more than its book value and part of the gain may be taxed as ordinary income.

Once more: this is general information, not tax advice. Asset classes, lives, limits, and elections shift with tax law — verify current rules with a professional before you file. Keep a simple fixed-asset register — purchase date, cost, method, and accumulated depreciation per asset — so neither you nor your accountant has to reconstruct anything at tax time.