Journal entry for depreciation, with examples

A $12,000 machine paid for in January is not a $12,000 January cost. It will do work for five years, so its cost belongs to five years, a sixtieth at a time. Expense it on the day it was bought and January looks like a disaster, while the next fifty-nine months get the use of the machine for free.

Depreciation is the entry that spreads that cost. It is also one of the few entries no bank feed will ever produce, because nothing happens on the day it is due: no money moves and no bill arrives. If nobody posts it, it does not exist.

The standard depreciation journal entry

Every routine depreciation entry touches two specific accounts: an expense account on the profit and loss statement and a contra-asset account on the balance sheet.

For a piece of machinery with $200.00 of monthly depreciation:

Date	Account	Account type	Debit	Credit
Jan 31	Depreciation Expense	Other Expense	200.00
Jan 31	Accumulated Depreciation	Fixed Asset (Contra)		200.00

Depreciation Expense increases operational overhead by $200.00 for January, reducing net income. Accumulated Depreciation increases by $200.00, reducing the net carrying value of the machinery on the balance sheet.

Why you never credit the asset account directly

The most frequent error in DIY bookkeeping files is crediting the equipment asset account directly (e.g., crediting Machinery & Equipment instead of Accumulated Depreciation).

Under the historical cost principle, the asset account must reflect the gross original purchase price ($12,000.00) until the day that asset is sold, scrapped, or retired. Recording depreciation against a separate contra-asset account preserves three vital pieces of operational information on your balance sheet:

1. Original acquisition cost: What the business originally paid for its productive capacity.
2. Total accumulated wear: How much economic life has been consumed to date.
3. Net book value: The remaining undepreciated cost basis.

If you credit the asset account directly, historical cost is lost, your balance sheet hides the age of your equipment, and calculating depreciation schedules or tax gains on disposal becomes an audit headache.

How to calculate straight-line depreciation

Straight-line is the standard depreciation method used for book accounting in small-to-midsize businesses. It divides depreciable cost evenly across each month of useful life.

The formula is:

Monthly Depreciation = (Historical Cost − Salvage Value) ÷ (Useful Life in Years × 12)

Worked calculation example

Assume your business purchases commercial shop equipment on January 1:

• Purchase price: $12,000.00
• Estimated salvage value: $1,200.00 (estimated residual value at retirement)
• Depreciable base: $10,800.00 ($12,000.00 cost minus $1,200.00 salvage)
• Useful life: 5 years (60 months)

Monthly Depreciation = $10,800.00 ÷ 60 months = $180.00 per month

Over 5 years, the business posts $180.00 every month ($2,160.00 per year) until Accumulated Depreciation reaches $10,800.00, leaving exactly the $1,200.00 salvage value on the balance sheet. The entries elsewhere on this page assume zero salvage, which is where the $200.00 a month comes from.

Depreciation method	How it calculates	Best use case
Straight-Line	Equal expense every month	Standard management books (GAAP)
Double Declining Balance	Accelerated expense in early years	High-tech assets that lose value rapidly
Units of Production	Expense tied to machine hours or miles	Manufacturing tools or heavy delivery fleets
Tax Depreciation (MACRS)	IRS statutory recovery periods (often paired with Section 179 or bonus elections)	Federal tax returns only (not management books)

Balance sheet presentation: carrying value

Accumulated Depreciation is a contra-asset account. Although it lives in the Asset section of your balance sheet, it maintains a natural credit balance. It subtracts from gross fixed assets to display Net Book Value.

At the end of Year 1 (12 months at $200.00/month with zero salvage value):

Balance sheet line	Amount
Machinery & Equipment (at cost)	$12,000.00
Less: Accumulated Depreciation	($2,400.00)
Net book value	$9,600.00

When an external lender, investor, or buyer reviews your balance sheet, they immediately see that you own $12,000.00 worth of equipment that is 20% through its productive lifecycle.

Book depreciation vs tax depreciation (The CPA handoff)

One of the largest points of confusion for business owners is why their monthly bookkeeping records small, steady depreciation while their year-end tax return shows a massive tax write-off.

Book depreciation and tax depreciation serve two completely different objectives:

• Book depreciation (Accrual / GAAP): Designed to match equipment wear to the revenue it produces each month, giving leadership an accurate picture of operating margins.
• Tax depreciation (IRS MACRS / Section 179): Designed to accelerate deductions. Section 179 expensing and bonus depreciation under IRC §168(k) often let a business deduct up to 100% of an asset’s cost in the year it is placed in service. The 2025 budget act (Public Law 119-21) made 100% bonus depreciation permanent for qualifying property acquired after January 19, 2025.

Do not force your management books to match tax depreciation. Writing off a $12,000 machine in month one on your general ledger creates an artificial $12,000 expense spike that ruins your monthly financial ratios.

Keep your monthly books on straight-line depreciation. At year-end, provide your fixed asset register to your CPA. Your CPA will calculate tax depreciation (MACRS) on Form 4562 and reconcile the book-to-tax difference (on Schedule M-1 for Form 1120, 1120-S, or 1065 filers).

How to set up depreciation in QuickBooks Online

QuickBooks Online Simple Start, Essentials, and Plus do not calculate depreciation. QuickBooks Online Advanced has a fixed asset feature that can post it for you; on every other plan, follow this 3-step setup:

Step 1: Create the asset account and its two sub-accounts

1. Open the Chart of accounts and select New.
2. Set Account Type to Fixed Assets and Detail Type to Machinery & Equipment. Name it Machinery & Equipment.
3. Select New again. Same Account Type and Detail Type, name it Original Cost, and make it a sub-account of Machinery & Equipment. Purchases of equipment go here.
4. Select New once more. Account Type Fixed Assets, Detail Type Accumulated Depreciation, name it Accumulated Depreciation, and make it a sub-account of Machinery & Equipment.

The parent account now shows net book value on the balance sheet, with cost and accumulated depreciation visible underneath it.

Step 2: Create the depreciation expense account

1. Open the Chart of accounts and select New.
2. Set Account Type to Other Expense.
3. Set Detail Type to Depreciation.
4. Name the account Depreciation Expense.

Step 3: Schedule a recurring journal entry

1. Click + New > Journal Entry.
2. Line 1: Debit Depreciation Expense for $200.00.
3. Line 2: Credit Machinery & Equipment:Accumulated Depreciation for $200.00.
4. Click Make recurring at the bottom of the screen.
5. Set Template Type to Scheduled, Frequency to Monthly, and Day to Last day of each month.
6. Set an End Date corresponding to the asset’s useful life (e.g., after 60 occurrences).

QuickBooks will now post your monthly depreciation automatically during your month-end close.

What happens when you dispose of an asset?

Depreciation stops when an asset reaches the end of its useful life or when it is disposed of. When you sell, scrap, or trade in an asset, you must remove both the original cost and the accumulated depreciation from the general ledger with a formal asset disposal journal entry:

1. Remove Accumulated Depreciation: Debit the Accumulated Depreciation sub-account for its full balance.
2. Remove the Asset: Credit the Original Cost sub-account for the original purchase cost.
3. Record Cash Received: Debit Checking for any proceeds received from the buyer.
4. Recognize Gain or Loss: Post the difference to Gain on Disposal of Assets or Loss on Disposal of Assets.

Sell the $12,000.00 machine after 40 months at $200.00 a month (accumulated depreciation of $8,000.00, book value of $4,000.00) for $5,000.00, and the entry produces a $1,000.00 gain. The disposal guide works through that sale, a sale at a loss, and a machine scrapped for nothing.

Four fixed asset mistakes in inherited files

In catch-up and cleanup files that have operated without formal fixed asset schedules, depreciation errors fall into four common traps:

1. The missing capitalization: Equipment purchases of $5,000 or $10,000 were coded directly to Supplies or Job Materials from the bank feed. The de minimis safe harbor lets a business without audited financial statements expense items up to $2,500 each, but only if it makes the annual election under Treas. Reg. §1.263(a)-1(f), and never for items above the limit.
2. Negative asset balances: Depreciation entries continued running automatically past the end of the asset’s useful life, pushing Net Book Value below salvage value and, eventually, below zero.
3. Asset accounts credited directly: Equipment balances were depleted down to zero without an accumulated depreciation record, making historical tracking impossible.
4. The multi-year tax dump: No monthly depreciation was posted for 3 years, followed by a bookkeeper posting a $45,000 catch-up entry directly into current year operating expenses, distorting annual earnings.

Untangling a fixed asset schedule requires reconstructing original invoices, auditing past tax returns (Form 4562 and the preparer’s asset module) to determine deductions already taken, and tying net book value back to real equipment on hand.

If your fixed asset and accumulated depreciation accounts have not been reconciled against an asset register, that is cleanup work, priced by how many months of ledger history require correction:

$99per month of backlog20% off 6+ months

Once the register is right, depreciation is one of the standing entries in a monthly close, posted alongside prepaid releases and accruals. The journal entry reference has the rest of them, and if you want a second look at your fixed asset accounts, send the file for a free review.