Physical capital is the tangible, manufactured property a business uses to produce goods or deliver services: machinery, vehicles, buildings, tools, office equipment, and the raw materials and inventory that flow through operations. It sits on the balance sheet as a real, measurable asset, and its cost is generally recovered over time through depreciation, though several tax provisions let businesses write off much of it immediately.
What Counts as Physical Capital
The test is physical substance. A CNC milling machine, a commercial oven, a fleet of delivery vans, a stack of lumber in a warehouse all qualify. Software licenses, brand recognition, and patents do not, because they lack physical form. Within the category, two groups behave differently on the books.
Fixed Assets
Fixed assets are long-term items used repeatedly across production cycles. They share three traits: they’re acquired for use in operations rather than resale, they last longer than one year, and they have physical substance.1Board of Governors of the Federal Reserve System. Financial Accounting Manual for Federal Reserve Banks – Chapter 3 Property and Equipment A food manufacturer’s factory building, packaging line, and refrigerated trucks are fixed assets. A law firm’s fixed assets look different (document servers, office furniture, corporate vehicles), but the principle holds.
Working Capital
Working capital is the short-term physical stock a business consumes or sells. For a food manufacturer, that means sugar, flour, and packaging film. For a retailer, it’s finished inventory. These items cycle through quickly but represent real value at any given moment. How a company values inventory (FIFO or LIFO) directly affects reported profits and tax liability, especially when prices are rising.
Physical Capital vs. Financial and Human Capital
These three types of capital work together but follow different rules. Financial capital is money: cash reserves, bank loans, lines of credit, equity investments. A $5 million loan to buy a robotic welding system is financial capital. The welding system is physical capital. One funds the acquisition; the other is the productive resource. Financial capital shows up as cash or liabilities on the balance sheet, while physical capital appears as property, plant, and equipment.
Human capital is the knowledge, skill, and experience your employees carry. The engineer who programs and maintains that welding robot is human capital, and when she leaves, her expertise leaves with her. The robot stays. A business owns its physical capital outright but only rents the benefit of human capital while the employment relationship lasts. Both are necessary. Advanced equipment without trained operators is just expensive furniture.
Depreciating Physical Capital
When you buy equipment that will last several years, you can’t deduct the full cost in the year of purchase. Federal tax law requires you to capitalize the asset and gradually deduct its cost over its useful life through depreciation.2Internal Revenue Service. Tangible Property Final Regulations The matching principle lines up expense with the revenue the asset helps generate.
Depreciation is a paper loss, not a cash outflow. The machine doesn’t send you a bill each year; you record a non-cash expense that reduces taxable income. The starting point is the asset’s historical cost, meaning the purchase price plus shipping, installation, and anything else needed to place it in service. Subtract the salvage value (what you expect the asset to be worth at the end) to get the depreciable base.
MACRS Recovery Periods
Most U.S. business property is depreciated under the Modified Accelerated Cost Recovery System, which assigns assets to specific recovery periods:3Internal Revenue Service. Publication 946 – How To Depreciate Property
- 5-year property: automobiles, taxis, buses, trucks, and office machinery like copiers and calculators.
- 7-year property: office furniture and fixtures such as desks, filing cabinets, and safes, along with most general-purpose machinery.
- 15-year property: land improvements like fences, roads, sidewalks, and landscaping.
- 27.5-year property: residential rental buildings.
- 39-year property: nonresidential real property such as office buildings, stores, and warehouses.
Straight-Line vs. Accelerated Methods
Straight-line depreciation spreads the depreciable cost evenly. A $70,000 piece of equipment with no salvage value and a 7-year life yields a $10,000 deduction each year. Predictable, steady, easy to plan around.
Accelerated methods like the double declining balance front-load deductions. You claim larger write-offs early and smaller ones later. For tax purposes, bigger deductions sooner mean lower tax bills sooner, which helps cash flow right after a large purchase. All depreciation is reported to the IRS on Form 4562.4Internal Revenue Service. About Form 4562, Depreciation and Amortization
Faster Write-Offs for Capital Purchases
Standard depreciation spreads the deduction across years, but three provisions let businesses accelerate or immediately expense qualifying property. Missing them is one of the more expensive mistakes a business can make.
Section 179 Expensing
Section 179 lets you expense the full purchase price of qualifying property in the year you place it in service, skipping traditional depreciation entirely. For tax years beginning in 2026, the maximum deduction is $2,560,000. The ceiling phases out dollar-for-dollar once total qualifying property placed in service exceeds $4,090,000, which effectively targets the benefit toward small and mid-sized businesses.3Internal Revenue Service. Publication 946 – How To Depreciate Property The election is made on Form 4562.4Internal Revenue Service. About Form 4562, Depreciation and Amortization
Bonus Depreciation
Bonus depreciation under IRC ยง 168(k) allows an immediate deduction for a percentage of the cost of qualifying new and used property. Under the Tax Cuts and Jobs Act, 100% bonus depreciation was available through 2022 and then began phasing down by 20 percentage points per year. The One Big Beautiful Bill Act restored 100% bonus depreciation permanently for qualified property acquired after January 19, 2025, so businesses placing eligible equipment in service in 2026 can generally deduct the full cost in year one. Unlike Section 179, bonus depreciation has no dollar cap and no phase-out based on total spending.
De Minimis Safe Harbor
For smaller purchases, the de minimis safe harbor election lets you immediately expense tangible property below a set per-item threshold rather than capitalizing it. Businesses with an applicable financial statement (an audited statement, for example) can expense items costing up to $5,000 per invoice. Businesses without one can expense items up to $2,500 per invoice.2Internal Revenue Service. Tangible Property Final Regulations This clears routine purchases like laptops, small tools, and replacement parts off your depreciation schedules.
When Repairs Become Capital Improvements
Not every dollar spent on existing equipment is treated the same. Routine repairs (fixing a leak, replacing a worn belt, repainting) are deductible as ordinary business expenses in the year you pay for them. Improvements have to be capitalized and depreciated over the asset’s remaining life. The gap between deducting an amount this year and spreading it across decades for a building is substantial.
The IRS uses what practitioners call the BAR test. An expenditure is an improvement if it results in a betterment, adaptation, or restoration of the property:2Internal Revenue Service. Tangible Property Final Regulations
- Betterment: the work fixes a pre-existing defect, physically enlarges the property, or materially increases its capacity, productivity, or quality.
- Restoration: the work returns a non-functional asset to operating condition, rebuilds it to like-new condition after the end of its useful life, or replaces a major component or substantial structural part.
- Adaptation: the work adapts the property to a use different from its original intended purpose.
Where the line falls depends heavily on what the IRS treats as the “unit of property.” A new roof on a commercial building is generally an improvement to the building structure, but replacing a single broken window in the same building is a repair. The larger the unit of property, the more likely a given expenditure counts as a repair. For buildings, the IRS divides the structure into up to nine separate units of property: the building itself plus up to eight building systems (HVAC, plumbing, electrical, and so on).
Selling or Retiring Physical Capital
What happens at the end of an asset’s life matters as much as how you depreciated it along the way. The tax consequences of disposal catch many owners off guard.
Depreciation Recapture
If you sell equipment for more than its depreciated book value, you don’t get to treat the whole gain as a capital gain. Under Section 1245, the portion of the gain attributable to depreciation you previously deducted is recaptured and taxed as ordinary income.5Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property Recapture includes depreciation claimed through Section 179 and bonus depreciation, not just standard MACRS.
A simplified example: you buy a machine for $100,000, depreciate it to $30,000 on your books, then sell it for $85,000. Your total gain is $55,000 ($85,000 minus the $30,000 adjusted basis). Because you claimed $70,000 in depreciation and the gain is only $55,000, the full $55,000 is recaptured and taxed at ordinary rates. Only gain exceeding the total depreciation taken would qualify for capital gains treatment. Businesses that took aggressive first-year deductions face especially large recapture hits when they sell equipment quickly.
Abandonment and Retirement
When an asset becomes worthless and can’t be sold, you may be able to claim an abandonment loss equal to its remaining book value. The IRS treats abandonment as a disposition, but qualifying takes more than letting equipment collect dust. You need genuine intent to permanently stop using the property, actions consistent with that intent (ceasing operations, removing the asset from service), and evidence the asset has truly lost its value. A formal company resolution, photographs showing disuse or damage, and an expert appraisal all help. The loss is reported on Form 4797.
Impairment
Depreciation assumes a steady, predictable decline. Real life isn’t always steady. A product line may become obsolete overnight, or a flood may damage equipment beyond insurance coverage. When circumstances suggest an asset’s actual value has dropped below its book value, companies test for impairment by comparing the carrying amount to the recoverable amount. If the asset fails the test, the company writes down the value and records the difference as a loss.6IFRS Foundation. IAS 36 – Impairment of Assets
Under U.S. accounting standards, physical assets are tested only when a triggering event suggests impairment: a significant drop in market price, a major change in how the asset is used, or adverse legal or regulatory developments. Certain intangible assets and goodwill require annual testing regardless, but for equipment and buildings, the trigger-based approach applies.
Ongoing Costs of Ownership
Buying the asset is only the beginning. Total cost of ownership includes transportation, installation, training, ongoing maintenance, insurance, and eventual disposal. Businesses that budget only for the purchase price routinely underestimate the true cost.
Preventive maintenance (scheduled inspections, part replacements, calibration) generally pays for itself against the cost of fixing things after they break. Reactive repairs carry premium labor rates, rush-order parts costs, and production downtime. Federal safety standards also require that industrial machinery be maintained in safe operating condition, and OSHA inspectors have authority to inspect workplace equipment during regular business hours.7Occupational Safety and Health Administration. Conduct of Inspections An imminent danger finding can force an immediate shutdown until the hazard is corrected.
Insurance is the other major ongoing line item. Business personal property coverage protects equipment kept at your location, while inland marine (or equipment floater) policies cover tools and equipment transported to job sites. Neither policy typically covers normal wear and tear or damage from natural disasters without specific endorsements, so knowing your exclusions before a loss occurs is worth the time.