What Is a Capital Purchase? Rules, Depreciation, and Section 179

A capital purchase is money your business spends to acquire or improve a long-lived asset — one you expect to use for more than a year. A delivery truck, a warehouse, a new production line, a patent, or a roof replacement all qualify. The tax code doesn’t let you deduct the full cost the year you pay for it. Instead, the cost sits on your balance sheet as an asset and gets recovered gradually through depreciation, though two provisions (Section 179 and bonus depreciation) can let you write off most or all of it up front.

What Counts as a Capital Purchase

The test is useful life. If what you bought will serve your business for longer than a single year, it’s generally a capital purchase rather than an operating expense. Rent, payroll, and utilities are operating expenses and get deducted in the year you pay them. Capital purchases get capitalized and depreciated.

Typical examples:

  • Equipment and machinery such as CNC machines, forklifts, commercial ovens, and printing presses
  • Vehicles, including delivery vans, company cars, and specialized trucks
  • Real property such as office buildings, warehouses, and retail space
  • Technology like servers, computer systems, and off-the-shelf software
  • Intangible assets such as patents, trademarks, and acquired copyrights
  • Building improvements including new roofing, HVAC systems, and security installations

One rule that catches business owners off guard is “placed in service.” Depreciation doesn’t start when you write the check or when the asset shows up on your loading dock. It starts when the asset is ready and available for its intended use.1Internal Revenue Service. Depreciation Reminders Equipment sitting crated because you haven’t installed it isn’t placed in service yet. A rental property is placed in service the moment it’s ready to rent, even if no tenant has signed a lease.

Capital Purchase or Deductible Repair

The line between a capital improvement and a repair changes when — and whether — you get to deduct the cost. Repairs come off your income immediately. Improvements get capitalized and depreciated. The IRS focuses real audit attention here, and the tangible property regulations set out three tests. If the work does any of them, it’s a capital expenditure:2Internal Revenue Service. Tangible Property Final Regulations

  • Betterment: it materially increases the asset’s capacity, productivity, efficiency, strength, or quality, or fixes a defect that existed before you acquired it.
  • Restoration: you replaced a major component or substantial structural part, or rebuilt the asset to like-new condition after the end of its useful life.
  • Adaptation: the work converts the asset to a new use inconsistent with its original use.

Patching a leaky roof is a repair. Replacing the entire roof almost certainly isn’t. Repainting an office is a repair. Gutting that office to build a restaurant kitchen is an adaptation. The middle cases are where documentation earns its keep.

Small Purchases You Can Expense Right Away

Not every long-lived purchase has to be capitalized. The de minimis safe harbor lets you immediately deduct low-cost items that would otherwise clog your depreciation schedule. Thresholds depend on whether your business has an applicable financial statement (broadly, an audited GAAP statement or one filed with the SEC):

Most small and mid-sized businesses fall under the $2,500 limit. You need a written accounting policy in place at the start of the tax year, applied consistently, and you make the election annually on your return.

How the Cost Gets Recovered Over Time

Once a purchase clears the de minimis threshold and qualifies as a capital asset, the cost is recovered through depreciation for tangible assets or amortization for intangibles. For federal tax purposes, nearly all business assets fall under the Modified Accelerated Cost Recovery System (MACRS), which assigns each property type to a class with a fixed recovery period:4Internal Revenue Service. IRS Publication 946 – How To Depreciate Property

  • 5-year property: computers, office equipment, automobiles, certain manufacturing equipment
  • 7-year property: office furniture, fixtures, agricultural machinery
  • 15-year property: land improvements such as parking lots and fencing, and qualified improvement property (interior improvements to nonresidential buildings)
  • 27.5 years: residential rental property
  • 39 years: nonresidential real property (commercial buildings)

For 3-, 5-, 7-, and 10-year classes, MACRS uses the 200% declining balance method, front-loading deductions into the early years and switching to straight-line when that produces a bigger deduction. The result: larger write-offs sooner than you’d see under the straight-line method used for financial reporting.

There’s also a timing rule. Under the default half-year convention, any asset placed in service during the year is treated as though placed in service at the midpoint, so you claim half a year’s depreciation in year one and half in the final year. If you place more than 40% of your total depreciable property in service in the last three months of the year, the mid-quarter convention takes over instead, which can shrink your first-year deduction meaningfully.

Writing Off the Full Cost in Year One

Two provisions can compress that whole schedule into the first year. Both are claimed on IRS Form 4562.5Internal Revenue Service. About Form 4562, Depreciation and Amortization (Including Information on Listed Property)

Section 179 Expensing

Section 179 lets you elect to deduct the full cost of qualifying property in the year you place it in service. The One Big Beautiful Bill Act raised the limits substantially. For tax years beginning in 2026, the base statutory deduction limit is $2,500,000, with a phase-out starting at $4,000,000 of qualifying property placed in service, both subject to inflation adjustment.6Office of the Law Revision Counsel. 26 USC 179 – Election To Expense Certain Depreciable Business Assets Above that threshold, the deduction phases out dollar for dollar.

Qualifying property includes tangible personal property (equipment, machinery, vehicles), off-the-shelf computer software, and certain real property improvements such as roofing, HVAC, fire protection, alarm, and security systems. Land, land improvements like parking lots and fences, property acquired by gift or inheritance, and property bought from a related party do not qualify.4Internal Revenue Service. IRS Publication 946 – How To Depreciate Property

An important cap: the Section 179 deduction cannot exceed your total taxable income from the active conduct of any trade or business during the year.7eCFR. 26 CFR 1.179-2 – Limitations on Amount Subject to Section 179 Election It can’t create or increase a net operating loss. Any unused portion carries forward.

Bonus Depreciation

Bonus depreciation under Section 168(k) runs on separate rules. The One Big Beautiful Bill Act permanently restored 100% bonus depreciation for qualifying property acquired and placed in service after January 19, 2025.8Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill For 2026, that means a full first-year write-off.

Compared with Section 179, bonus depreciation has no dollar cap, applies to used property (as long as it’s new to you), and can create or increase a net operating loss. The trade-offs: it doesn’t cover most real property, and you elect in or out for an entire class of property placed in service that year rather than picking asset by asset. Many businesses stack the two, using Section 179 on selected assets and bonus depreciation for the rest.

What Happens When You Sell

Depreciation is timing, not forgiveness. When you sell or dispose of a depreciated asset at a gain, the IRS recaptures the benefit through the tax rate applied to that gain. The rules split by asset type, and both get reported on IRS Form 4797.9Internal Revenue Service. Instructions for Form 4797 – Sales of Business Property

For depreciable personal property — equipment, machinery, vehicles, furniture — Section 1245 taxes gain up to the amount of depreciation you’ve claimed as ordinary income rather than at capital gains rates, regardless of holding period.10Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property Buy a machine for $100,000, claim $60,000 in depreciation, sell it for $80,000: the $40,000 gain is entirely ordinary income, because it doesn’t exceed the depreciation you already deducted.

For real property, Section 1250 works differently. The unrecaptured Section 1250 gain — essentially the depreciation on a commercial building — is taxed at a maximum rate of 25%, and any gain above your original purchase price is taxed at regular long-term capital gains rates.11Internal Revenue Service. Tax Topic 409 – Capital Gains and Losses

If you used Section 179 or bonus depreciation to zero out a purchase in year one and then sold two years later at a gain, the entire accelerated deduction gets recaptured. The upfront savings were real; the exit has a cost.

State Rules May Differ

Federal treatment isn’t the whole picture. Not every state conforms to the federal Section 179 limits or allows bonus depreciation — some cap the deduction well below the federal number, and some disallow bonus depreciation entirely. If you’re placing significant capital assets in service or operating across state lines, run the state numbers separately before assuming your federal calculation carries over.