Every startup eventually buys something that lasts longer than a single month. A laptop, a server rack, office furniture, maybe a vehicle. That purchase doesn't just vanish from your books the day you swipe the card. Its cost spreads across the years you'll actually use it. This is depreciation, and it's one of the first accounting concepts that trips up founders who are used to thinking in cash terms. If you're running a startup and wondering how to properly account for depreciation, you're in the right place. Getting this wrong can distort your financial statements, mess up your tax filings, and confuse potential investors during due diligence. The good news? The mechanics aren't complicated once you see them laid out. The tricky part is knowing which method to use, when to start, and how to handle the inevitable curveballs like impairment or disposal. This guide walks you through the correct journal entries, common pitfalls, and the moments where the rules shift under your feet. Whether you're pre-revenue or scaling fast, clean depreciation accounting signals financial maturity to anyone reading your books.
Depreciation is the systematic allocation of a tangible asset's cost over its useful life. In plain terms, you're spreading a big expense into smaller chunks that match the periods where the asset actually helps generate revenue. Your startup encounters this the moment it capitalizes a fixed asset: think equipment, computers, leasehold improvements, or vehicles.
Here's the high-level process. First, determine the asset's cost basis (purchase price plus setup costs). Second, estimate its useful life and salvage value. Third, pick a depreciation method (straight-line is the most common for startups). Fourth, record a monthly or annual journal entry that debits depreciation expense and credits accumulated depreciation. Fifth, review the asset periodically for impairment or changes in useful life.
The bottom line: you're not spending cash each month. You're recognizing an expense that already happened, spread over time. Read on for the exact accounts, journal entries, and edge cases that matter for early-stage companies.
The correct treatment under ASC 360 (Property, Plant, and Equipment) requires you to recognize depreciation expense over the asset's useful life. Two accounts are affected each period:
The asset itself stays on your balance sheet at its original cost. Accumulated depreciation builds up beneath it, and the difference is your net book value.
Here's a sample journal entry using the straight-line method. Suppose you buy a $12,000 server with a 3-year useful life and $0 salvage value. Annual depreciation is $4,000.
| Debit | Credit | |
|---|---|---|
| Depreciation Expense | $4,000 | |
| Accumulated Depreciation | $4,000 |
This entry reduces your net income by $4,000 each year while simultaneously lowering the asset's book value on the balance sheet. No cash moves. The cash left your account when you bought the server. Now you're just matching that cost to the revenue periods it supports, which is the core of accrual accounting.
Most startups default to straight-line because it's simple and predictable. Accelerated methods like double-declining balance or MACRS (for tax purposes) front-load the expense. Your CPA can help you decide, but straight-line is rarely wrong for GAAP reporting at the early stage.
Even experienced bookkeepers slip up here. Watch for these specific errors:
Expensing the full cost at purchase. If you buy a $5,000 laptop and dump the entire amount into an expense account in month one, you're understating assets and overstating expenses. Any tangible asset above your capitalization threshold should be depreciated, not expensed outright. Most startups set that threshold between $500 and $2,500.
Forgetting salvage value. Depreciating an asset all the way to zero when it actually has residual value inflates your total depreciation expense. Always estimate what you could sell or scrap the asset for at the end of its useful life, even if that number is small.
Continuing depreciation past useful life. Once an asset is fully depreciated, stop recording entries. It stays on your books at its salvage value (or zero) until you dispose of it. Continuing to credit accumulated depreciation past the depreciable base creates a negative book value, which makes no sense and flags errors during audit.
Depreciation isn't always a set-it-and-forget-it calculation. The treatment shifts when specific events occur.
An impairment trigger is the most common one. If your asset's fair value drops below its carrying value and that decline isn't temporary, ASC 360 requires you to write it down. You'd record an impairment loss, which reduces the asset's book value in one shot rather than spreading it over time.
Changes in estimated useful life also force a recalculation. Say you originally planned to use a piece of equipment for five years, but new technology makes it obsolete after three. You don't go back and restate prior periods. Instead, you spread the remaining depreciable base over the new, shorter remaining life going forward. This is called a change in accounting estimate under ASC 250, and it's handled prospectively.
Disposal is the final trigger. When you sell, scrap, or donate a depreciated asset, you remove both the asset and its accumulated depreciation from the books and record any gain or loss on the transaction.
Not all accounting platforms treat fixed assets the same way. Here's what to look for when choosing software for your startup.
Automatic schedule generation. Good software lets you enter an asset's cost, useful life, salvage value, and method, then auto-generates the monthly or annual journal entries. You shouldn't be manually posting depreciation each close cycle.
Depreciation method flexibility. Your platform should support straight-line at minimum, plus accelerated methods if you need them for tax reporting. Bonus points if it handles both book and tax depreciation in parallel so you can track temporary differences for deferred tax calculations.
Disposal and impairment workflows. When you sell or write down an asset, the software should calculate the gain or loss automatically, remove the right balances, and create the correct journal entry. Manual disposal entries are a common source of errors, especially when partial-year depreciation is involved.
Is depreciation expense a debit or a credit?
Depreciation expense is a debit. Each period, you debit the depreciation expense account and credit accumulated depreciation. The debit increases your expenses on the income statement, reducing net income. The credit increases accumulated depreciation, which is a contra-asset. It sits on the balance sheet and reduces the gross value of your fixed assets. Neither entry involves cash, which is why depreciation gets added back on the cash flow statement under the indirect method.
Is accumulated depreciation an asset or a liability?
Accumulated depreciation is a contra-asset, not a liability. It carries a credit balance and offsets the related fixed asset on your balance sheet. When you subtract accumulated depreciation from the asset's original cost, you get net book value. It doesn't represent money you owe anyone. It represents the portion of the asset's cost you've already recognized as an expense.
What happens to depreciation when I sell the asset?
You remove both the asset's cost and its accumulated depreciation from the books. If the sale price exceeds the net book value, you record a gain. If it's less, you record a loss. For example, if a $10,000 asset has $7,000 in accumulated depreciation and you sell it for $4,000, your gain is $1,000. The journal entry debits cash ($4,000), debits accumulated depreciation ($7,000), credits the asset ($10,000), and credits gain on disposal ($1,000).
Do I need to depreciate assets bought with a loan?
Yes. How you financed the asset doesn't change how you depreciate it. The full cost of the asset goes on your books as a fixed asset, and you depreciate it over its useful life regardless of whether you paid cash, used a loan, or signed a lease. The loan itself is a separate liability with its own accounting treatment, including interest expense.
Can I use different methods for book and tax depreciation?
Absolutely. Most startups use straight-line for GAAP (book) purposes and MACRS for federal tax purposes. This creates temporary differences that result in deferred tax assets or liabilities. Your accounting software should track both schedules so you can reconcile them at year-end without manual spreadsheets.
Puzzle is the AI-native accounting platform built for startups and the firms that serve them. From SAFEs to stock comp, Puzzle categorizes complex transactions correctly the first time, with a clean audit trail your accountant will actually trust. Spend less time second-guessing journal entries and more time on the work that matters.
