To record a capital expenditure, debit a fixed asset account (Equipment, Vehicles, Building, or similar) for the full cost basis and credit Cash if you paid outright, or Accounts Payable or Notes Payable if you financed the purchase. That single entry is only the start. Over the years the asset is in service you will also post periodic depreciation, and when you eventually sell, retire, or lose the asset you will make a final set of entries to remove it from the books. Federal tax law and GAAP treat the same purchase differently, so the initial entry needs to be built on the right numbers from day one.
Confirm the Cost Is a Capital Expenditure
Before you touch a fixed asset account, check that the cost actually has to be capitalized. Federal tax law prohibits deducting amounts paid for permanent improvements that increase the value of property; those costs must be capitalized instead.1Office of the Law Revision Counsel. 26 U.S. Code 263 – Capital Expenditures Routine repairs and maintenance are deducted as current-year expenses. The IRS uses three tests to sort improvements from repairs:
- Betterment: the cost materially increases the property’s productivity, efficiency, strength, quality, or output.
- Restoration: the cost replaces a major component or substantial structural part, or returns non-functional property to normal operating condition.
- Adaptation: the cost adapts the property to a new or different use inconsistent with its original use.
A cost that fails all three tests is generally a deductible repair.2Internal Revenue Service. Tangible Property Final Regulations Replacing a cracked window pane is a repair; replacing an entire HVAC system is a restoration and must be capitalized. A routine maintenance safe harbor also lets you deduct recurring activities you reasonably expect to perform more than once during the first ten years of a building’s service, though the safe harbor does not cover betterments.
What You Need Before Writing the Entry
Gather three pieces of information from the purchase documents before you post anything.
The Full Cost Basis
Cost basis is not just the invoice price. It includes sales tax, freight and delivery, installation, and professional fees such as legal costs for a title transfer.3Internal Revenue Service. Topic No. 703, Basis of Assets A $50,000 machine that carries $3,500 in sales tax, $1,200 in shipping, and $800 in installation goes on the books at $55,500, not $50,000. That combined number is what you debit to the fixed asset account.
The Placed-in-Service Date
Depreciation does not start when you write the check. It starts on the date the asset is ready and available for its intended use, even if you have not begun using it yet. A machine that needs installation is placed in service when installation is complete and the machine is operational, not when it arrives at the loading dock.4Internal Revenue Service. Publication 946, How To Depreciate Property
Useful Life, Residual Value, and Recovery Period
For book purposes under GAAP, you estimate how long the asset will remain productive and what it will be worth at the end. Residual value is subtracted from cost basis to determine the total amount you will depreciate. For tax purposes, the IRS assigns recovery periods under the Modified Accelerated Cost Recovery System (MACRS). Common ones include five-year property (automobiles, trucks, computers, copiers), seven-year property (office furniture and fixtures), and 39-year property (nonresidential real property such as offices, stores, and warehouses).4Internal Revenue Service. Publication 946, How To Depreciate Property These come from IRS tables, not from management estimates. Record the cost basis, placed-in-service date, useful life, residual value, and depreciation method in a capital asset register so you have support for future returns and audits.
The Purchase Journal Entry
With cost basis in hand, the entry is a two-line posting that keeps the books in balance:
- Debit the appropriate fixed asset account (Machinery, Vehicles, Office Equipment, Buildings) for the full cost basis. Total assets on the balance sheet increase by that amount.
- Credit the funding account for the same amount: Cash if you paid outright, Accounts Payable if the vendor invoiced you, or Notes Payable if you financed with a loan.
Buy a delivery truck for $40,000 cash, and the entry is a $40,000 debit to Vehicles and a $40,000 credit to Cash. Finance the same truck with a bank loan, and the credit shifts to Notes Payable. Accounting software will often generate this entry automatically when you flag an invoice as a capital item, but knowing the underlying logic is how you catch errors and answer auditor questions.
Recording Depreciation Each Period
Once the asset is on the books, its cost is allocated to expense over the years it produces revenue. Each period, usually monthly or annually, you post:
- A debit to Depreciation Expense, which appears on the income statement and reduces net income.
- A credit to Accumulated Depreciation, a contra-asset account that sits below the fixed asset on the balance sheet and tracks total depreciation taken to date.
Book value at any point equals original cost minus accumulated depreciation. Accumulated depreciation grows over time and book value declines toward residual value.
Book Depreciation Under GAAP
Straight-line is the common method for financial statements. Subtract residual value from cost basis, then divide by useful life. A $30,000 vehicle with a $5,000 residual and a five-year life produces $5,000 of depreciation expense each year.
Tax Depreciation Under MACRS
For the federal return, you generally must use MACRS rather than straight-line. MACRS treats salvage value as zero, so you depreciate the full cost basis.5Office of the Law Revision Counsel. 26 U.S. Code 168 – Accelerated Cost Recovery System It typically applies the 200-percent declining balance method, switching to straight-line when that produces a larger deduction, which front-loads the deductions into the early years of the asset’s life. Because book and tax amounts diverge, most businesses keep two depreciation schedules per asset.
First-Year Deductions That Change the Entry
Two federal tax provisions let you deduct large portions of a capital purchase in year one instead of spreading it out. Both change what the journal entry looks like.
Section 179 Expensing
Section 179 lets you elect to deduct the cost of qualifying business property as a current expense rather than capitalizing and depreciating it. The statute sets a base deduction limit of $2,500,000, which phases out dollar-for-dollar once total qualifying property placed in service during the year exceeds $4,000,000. Both thresholds are adjusted annually for inflation. The deduction cannot exceed the business’s taxable income from active operations, though any disallowed amount carries forward.6Office of the Law Revision Counsel. 26 USC 179 – Election to Expense Certain Depreciable Business Assets Heavy sport utility vehicles are capped at $25,000 regardless of full cost.
When you elect Section 179, you debit an expense account (Section 179 Expense) for the deducted amount instead of building the full cost into a fixed asset. If only part of the cost is expensed, capitalize and depreciate the remainder in the usual way.
100-Percent Bonus Depreciation
Under the One Big Beautiful Bill Act, businesses can deduct 100 percent of the cost of qualifying property in the first year if it was acquired and placed in service after January 19, 2025.7Internal Revenue Service. One, Big, Beautiful Bill Provisions Bonus depreciation applies automatically unless you elect out. Unlike Section 179, it has no dollar cap and no taxable-income limit, and it can create or increase a net operating loss. You can apply Section 179 first and then bonus depreciation on any remaining basis. The entry follows the same logic: expense the portion deducted immediately, capitalize whatever balance is left.
De Minimis Safe Harbor: When You Can Skip Capitalization
Not every purchase needs to sit on the balance sheet. The IRS de minimis safe harbor lets you deduct small-dollar purchases as current expenses. The per-item or per-invoice thresholds are $5,000 if your business has an applicable financial statement (audited statements, an SEC filing, or certain other specified statements), and $2,500 if it does not.
To use it, attach a statement titled “Section 1.263(a)-1(f) de minimis safe harbor election” to your timely filed return for the year, including your name, address, and taxpayer identification number. The election is annual and all-or-nothing: if you make it, you apply it to every qualifying expenditure that year.2Internal Revenue Service. Tangible Property Final Regulations For items that qualify, the entry is a simple debit to a supplies or general expense account and a credit to Cash or Accounts Payable. No fixed asset account, no depreciation schedule, no capital register entry.
Disposal Entries: Sale, Retirement, and Loss
When the asset finally leaves the business, you post a set of entries to remove it from the books. The mechanics depend on how it left and whether you received anything for it.
Sale of an Asset
Three entries move together:
- Credit the fixed asset account for the original cost basis, removing the asset.
- Debit Accumulated Depreciation for total depreciation recorded over the asset’s life, zeroing out the contra-asset balance.
- Debit Cash (or Accounts Receivable) for what the buyer pays.
Any imbalance is a gain or loss. If sale price exceeds book value (original cost minus accumulated depreciation), credit Gain on Disposal of Assets for the difference. If sale price falls short, debit Loss on Disposal of Assets. Equipment that originally cost $20,000 with $15,000 in accumulated depreciation has a $5,000 book value; selling it for $7,000 produces a $2,000 gain, and selling it for $3,000 produces a $2,000 loss.
Retirement Without a Sale
If you scrap or retire the asset with no proceeds, the entries are the same minus the debit to Cash. Any remaining book value becomes a loss. Recording the disposal cleanly matters: it drives your tax reporting on the gain or loss and stops the asset from inflating the balance sheet or generating phantom depreciation.
Involuntary Conversions
Assets are sometimes lost to theft, casualty, or government seizure. Federal tax law allows you to defer the gain from an involuntary conversion if you reinvest the insurance proceeds or compensation in similar replacement property within a specified window, generally two years after the end of the tax year in which you first realize the gain. If the converted property is replaced directly with similar property rather than cash, no gain is recognized at all. Losses from involuntary conversions fall under separate casualty-loss rules.8Office of the Law Revision Counsel. 26 USC 1033 – Involuntary Conversions On the books, remove the destroyed or stolen asset with the same debit to Accumulated Depreciation and credit to the fixed asset account. If insurance proceeds exceed book value but you reinvest in qualifying replacement property, record the new asset at an adjusted basis rather than booking an immediate taxable gain.