How to Record Equipment Depreciation: Methods, Entries, and Disposal

To record equipment depreciation, write a journal entry each period that debits Depreciation Expense and credits Accumulated Depreciation for the same amount. That amount comes from three inputs you set once per asset: the cost basis, the salvage value, and the recovery period. The entry itself never changes shape. What changes is how you calculate the dollar figure and whether the first year gets a much larger deduction under Section 179 or bonus depreciation.

The Three Numbers You Need Before You Write the Entry

Every depreciation calculation rests on three figures. Get them wrong and every journal entry that follows is wrong.

Cost basis is not just the invoice price. It includes sales tax, freight, installation, and testing needed to get the equipment ready for its intended use.¹ A $40,000 CNC machine with $2,400 in sales tax, $1,200 in shipping, and $800 in installation has a depreciable basis of $44,400.

Salvage value is your estimate of what the equipment will be worth at the end of its useful life, whether that means a trade-in, resale, or scrap. You never depreciate below this floor.

Recovery period is the number of years the IRS assigns to the asset class, not the number of years you actually expect to use it. Under the Modified Accelerated Cost Recovery System (MACRS), office machinery such as copiers falls into the 5-year class, and office furniture, desks, and safes fall into the 7-year class. Property that doesn’t fit a specific category defaults to 7 years.²

Calculating the Amount

Three methods cover almost every situation. Two are allowed for tax purposes; the third is a book-only option.

Straight-Line

Subtract salvage value from cost basis, then divide by the recovery period. A machine with a $44,400 basis, $4,400 salvage value, and 7-year recovery period yields a $40,000 depreciable base and $5,714 of depreciation per full year ($40,000 ÷ 7).² Every full year the entry is identical. Straight-line is the simplest option and the most common for financial statements.

Double-Declining Balance

Double-declining balance (DDB) front-loads the deduction. The rate equals 200% divided by the recovery period, so 7-year property depreciates at roughly 28.57% (200% ÷ 7). You apply that rate to the equipment’s remaining book value each year, not to the original basis, so the deduction shrinks over time.²

At some point, straight-line on the remaining balance produces a larger deduction than DDB. MACRS lets you switch at that crossover, and the IRS percentage tables in Publication 946 bake the switch in. Most businesses simply look up the year’s applicable percentage rather than running the math by hand.

Units of Production

When usage swings widely from year to year, units-of-production ties depreciation to output. Divide the depreciable base by total estimated lifetime output (units, hours, miles) to get a per-unit rate. A press with a $40,000 base and 500,000-unit expected life carries a rate of $0.08 per unit; 75,000 units this year produces a $6,000 entry. This method is fine for books but is not available under MACRS for tax purposes, so if you use it you’ll run a separate tax calculation.

The First-Year Timing Rule

You almost never place equipment in service on January 1, and the IRS doesn’t ask you to prorate to the day. MACRS uses conventions instead.

The default is the half-year convention. Every asset placed in service during the year is treated as if it went in at the year’s midpoint, so you claim half a year of depreciation regardless of the actual acquisition date.²

The mid-quarter convention kicks in if more than 40% of the year’s total depreciable basis was placed in service during the last three months of the year.³ Each asset is then treated as placed in service at the midpoint of its actual quarter. Equipment bought in October gets 1.5 months of depreciation in year one, which is much less than the half-year convention would allow. This rule blocks the strategy of buying in December to claim six months of depreciation.

Writing the Journal Entry

Once you know the dollar amount, the entry has two lines:

Debit Depreciation Expense for the period amount. This increases the expense on the income statement and reduces reported profit.
Credit Accumulated Depreciation for the same amount. This is a contra-asset account that sits on the balance sheet against the equipment.

Annual depreciation of $5,714 on a forklift becomes: debit Depreciation Expense $5,714, credit Accumulated Depreciation – Equipment $5,714. The Equipment account itself never moves; it stays at original cost. Net book value is the original cost minus the accumulated depreciation balance.

The reason for the contra-account structure is transparency. Anyone reading the balance sheet can see both what you paid and how much has been allocated to prior periods. Reducing the Equipment account directly would erase that history.

Frequency depends on your reporting cycle. If you produce monthly financials, record one-twelfth of the annual amount each month. If you only close the books at year-end, one annual entry is enough. The total for the year is identical either way. Pick a schedule and hold to it.

When the First-Year Entry Is Much Larger

Two federal provisions let you deduct most or all of an equipment purchase in the first year rather than spreading it over the recovery period. Both change how large the first-year journal entry is, not its two-line structure.

Section 179

Section 179 lets you expense the full cost of qualifying equipment in the year it’s placed in service, up to an annual cap. For tax year 2026, the maximum deduction is $2,560,000. The cap phases out dollar-for-dollar once total qualifying property placed in service exceeds $4,090,000 and disappears entirely at $6,650,000. Both thresholds adjust for inflation.²

New and used tangible equipment qualifies, along with off-the-shelf software and certain improvements. The deduction can’t exceed the business’s taxable income for the year; anything above that carries forward.

The journal entry debits Depreciation Expense (or a separate Section 179 Expense account) and credits Accumulated Depreciation for the full expensed amount, all in year one.

Bonus Depreciation

The One, Big, Beautiful Bill Act permanently restored 100% first-year bonus depreciation for qualifying property acquired after January 19, 2025.⁴ There’s no dollar cap. Both new and used equipment qualify as long as it’s new to you. Unlike Section 179, bonus depreciation can create or increase a net operating loss, which makes it more useful for businesses not yet profitable.

IRS rules generally require Section 179 first, then bonus depreciation on any remaining cost. For most small and mid-sized purchases, either provision alone covers the full amount, so sequencing matters mainly for large capital outlays near the Section 179 cap.

De Minimis Safe Harbor

For lower-cost items, the de minimis safe harbor election skips depreciation entirely. Businesses without audited financial statements can expense items costing $2,500 or less per invoice or item. Businesses with applicable financial statements can expense items up to $5,000. The election is made annually by attaching a statement to the tax return. A $1,800 laptop or $2,200 printer never needs a depreciation schedule under this safe harbor. Expense it in the year of purchase and move on.

Recording the Disposal

When equipment is sold, traded, scrapped, or retired, you have to clear it off the books. The goal of the disposal entry is to remove both the original cost and all accumulated depreciation, record whatever came in, and recognize any gain or loss.

Before writing the disposal entry, update depreciation through the date of sale. Selling a machine on September 30 means posting nine months of current-year depreciation first (subject to the applicable convention). Then:

Debit Accumulated Depreciation for its full balance to zero out the contra-account.
Credit the Equipment account for the original cost to remove the asset.
Debit Cash (or whatever you received) for the sale proceeds.
Debit Loss on Sale or credit Gain on Sale to balance the entry.

A truck that originally cost $35,000 with $28,000 of accumulated depreciation has a $7,000 book value. Sold for $5,000, the entry is: debit Cash $5,000, debit Accumulated Depreciation $28,000, debit Loss on Sale $2,000, credit Truck $35,000. Sold for $10,000 instead, the entry is: debit Cash $10,000, debit Accumulated Depreciation $28,000, credit Truck $35,000, credit Gain on Sale $3,000.

Fully depreciated equipment retired with no proceeds is simpler: debit Accumulated Depreciation and credit the Equipment account for the original cost. Both accounts settle at zero.

Depreciation Recapture on the Tax Return

The gain on your books is not the whole tax story. Under Section 1245, gain on the sale of depreciable equipment is treated as ordinary income to the extent of all prior depreciation deductions, including anything claimed under Section 179 and bonus depreciation.⁵⁶ Equipment bought for $50,000, fully depreciated to zero, and sold for $12,000 produces $12,000 of ordinary income, not a capital gain. Only gain above total prior depreciation qualifies for capital treatment, which is rare for equipment. Gains and losses from these sales are reported on Form 4797.⁷

Two Situations Where the Basic Entry Isn’t Enough

Listed Property

Vehicles, computers, cell phones, and other equipment that lends itself to personal use are classified as listed property. To claim Section 179 or bonus depreciation on listed property, you must use it more than 50% for business.⁸ Fall at or below 50% and you’re limited to straight-line depreciation under the Alternative Depreciation System, which stretches deductions over a longer recovery period. If business use drops to 50% or less after you already claimed accelerated deductions, part of the earlier deduction must be recaptured as income on Form 4797. Keep a contemporaneous log showing dates, business purpose, and either mileage or hours of use. After-the-fact estimates won’t hold up.

When Your Books and Tax Return Use Different Methods

Many businesses run straight-line on the financial statements while claiming MACRS, Section 179, or bonus depreciation on the tax return. That creates a timing difference. Tax depreciation runs faster in the early years, so taxable income is lower than book income. In later years the pattern reverses.

Businesses reporting under generally accepted accounting principles record a deferred tax liability to acknowledge that future tax bills will be larger. The entry debits Income Tax Expense and credits Deferred Tax Liability for the difference between book and tax depreciation multiplied by the tax rate. It reverses gradually as the two schedules converge. Small businesses filing tax-basis financial statements skip this entry entirely because there’s no second set of books to reconcile.

Keeping the Schedule Current

The depreciation schedule is the internal record that supports every journal entry you post. For each asset it should show the description, acquisition date, cost basis, salvage value, method, recovery period, and accumulated depreciation to date. Book value falls out of those numbers. Update it whenever you post a depreciation entry, buy new equipment, or dispose of an asset. Keep the purchase invoice, proof of payment, and records of freight, installation, and sales tax that went into the basis. The burden of proving cost basis and recovery period rests on you.²

Once a year, walk the floor and match the physical equipment against the schedule. Ghost assets — items scrapped, stolen, or transferred but never removed from the books — inflate the balance sheet and distort depreciation expense. Find them, post the disposal entry, and move on.

1
Internal Revenue Service. Publication 551 (12/2025), Basis of Assets
2
Internal Revenue Service. Publication 946 (2024), How To Depreciate Property
3
eCFR. 26 CFR 1.168(d)-1 – Applicable Conventions, Half-Year and Mid-Quarter Conventions
4
Internal Revenue Service. Treasury, IRS Issue Guidance on the Additional First Year Depreciation Deduction Amended as Part of the One Big Beautiful Bill
5
Office of the Law Revision Counsel. 26 USC 1245 – Gain From Dispositions of Certain Depreciable Property
6
Internal Revenue Service. Publication 544 (2025), Sales and Other Dispositions of Assets
7
Internal Revenue Service. About Form 4797, Sales of Business Property
8
Internal Revenue Service. 2025 Instructions for Form 4562