Depreciation expense shows up in one of three places on the income statement, and the asset’s job decides which one. Depreciation on production equipment flows into cost of goods sold. Depreciation on office, administrative, and selling assets sits in operating expenses. Depreciation on assets unrelated to the core business goes in the non-operating section below operating income. The amount can be identical in each case; only the asset’s function moves the line.
Production Assets: Cost of Goods Sold
When a machine, conveyor belt, or other piece of equipment is used directly to make your product, its depreciation is a manufacturing cost. It does not hit the income statement the moment it is recorded. It gets absorbed into inventory on the balance sheet alongside raw materials and direct labor, becoming part of each unit’s total production cost.
The depreciation reaches the income statement only when the finished units are sold. At that point, the inventory cost transfers over to cost of goods sold. If you manufacture 10,000 units but sell 8,000, only the depreciation allocated to those 8,000 units flows through to COGS that period. The rest stays parked in inventory until those units move.
This follows GAAP’s requirement that all production costs, including indirect overhead like equipment depreciation, be capitalized into inventory rather than expensed immediately. If the machine helped make the product, the machine’s wear and tear is part of what that product cost to produce. Under absorption costing, every unit absorbs a share of fixed manufacturing overhead, including depreciation. It is the only method acceptable for external financial reporting.
The tax rules line up in the same direction. Section 263A of the Internal Revenue Code requires manufacturers to capitalize direct and indirect production costs, including depreciation on production equipment, into inventory rather than deducting them immediately.1Office of the Law Revision Counsel. 26 U.S. Code 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses Smaller businesses whose average annual gross receipts fall under an inflation-adjusted threshold are generally exempt from these uniform capitalization rules and can use simpler inventory methods.2Internal Revenue Service. Section 263A Costs for Self-Constructed Assets
For capital-intensive manufacturers, the depreciation embedded in COGS can meaningfully shape gross margin. Replacing aging equipment with more expensive machinery raises per-unit depreciation flowing through cost of goods sold, squeezing margins even when volume and pricing hold steady.
Office and Selling Assets: Operating Expenses
Depreciation on assets that support the business but are not part of production hits the income statement right away as an operating expense, inside selling, general, and administrative costs. Office furniture, computers used by the accounting team, the corporate headquarters building, and vehicles assigned to sales staff all generate depreciation that belongs here.
These are period costs, tied to a span of time rather than to a specific product. You record the expense in the month it occurs, with no inventory detour. For service companies, retailers, and tech firms that do not manufacture physical goods, this is where almost all depreciation lives. A software company’s server infrastructure, a law firm’s office buildout, and a consulting firm’s laptops all produce operating-expense depreciation.
The split between selling expenses and general and administrative expenses matters for internal analysis even when the income statement combines them. Depreciation on delivery trucks or sales display equipment is a selling expense. Depreciation on finance department furniture is a general and administrative expense. Both reduce operating income, but tracking them apart shows management where resources are actually being used.
Non-Core Assets: The Non-Operating Section
If your business owns assets that have nothing to do with its primary operations, depreciation on those assets belongs in the non-operating section of the income statement. That section sits below operating income and above income before taxes.
The classic example is a tech company that owns an apartment building as an investment. The depreciation is real, but it has nothing to do with the company’s ability to develop and sell software. Mixing it into operating expenses would inflate operating costs and distort operating margin. The same logic covers idle equipment awaiting sale, surplus real estate leased to a third party, and assets held by a subsidiary in a different industry.
The non-operating section also houses interest income, interest expense, and gains or losses on asset disposals. Grouping non-core depreciation here lets readers isolate the company’s core earning power from incidental items. A large non-operating depreciation charge is a signal to look at what the company owns outside its main line of business.
When Depreciation Is Shown on Its Own Line
Some companies choose to break depreciation out as a separate line on the income statement rather than leaving it embedded in COGS. When they do, SEC guidance requires the cost of sales line to be labeled accordingly, such as “Cost of sales, exclusive of depreciation shown separately below,” and the company cannot present a gross margin figure that ignores the excluded depreciation. Watch for that label when you read financial statements. Gross profit calculated on a cost-of-sales line that excludes depreciation is not comparable to gross profit at a competitor that leaves depreciation inside COGS.
Why Book and Tax Depreciation Differ, but the Location Doesn’t
The depreciation on your financial statements and the depreciation on your tax return are almost always calculated differently, and they don’t need to match. That is why the income tax expense on the income statement rarely equals the cash you actually send to the IRS.
For financial reporting, most companies use straight-line depreciation, spreading the asset’s cost evenly over its estimated useful life. A $100,000 machine with a 10-year life generates $10,000 of depreciation each year for a decade. The useful life reflects management’s estimate of how long the asset will remain productive.
For tax purposes, the standard method is MACRS, the Modified Accelerated Cost Recovery System.3Internal Revenue Service. Depreciation Frequently Asked Questions MACRS front-loads the deduction, giving larger write-offs in the early years and smaller ones later. Recovery periods are prescribed by asset class: office furniture gets 7 years, nonresidential real property gets 39 years, and you don’t get to substitute your own estimate.4Internal Revenue Service. Publication 946 – How To Depreciate Property
The mismatch creates a temporary difference. In early years, tax depreciation typically exceeds book depreciation, cutting taxable income by more than it cuts book income. In later years, the reverse happens. The cumulative gap shows up on the balance sheet as a deferred tax liability.
The key point for anyone trying to place depreciation on the income statement: both methods put depreciation in the same functional spot. Production assets sit in COGS, administrative and selling assets sit in SG&A, and non-core assets sit in the non-operating section. The method changes only the annual amount. It never changes the placement. The same rule holds when tax provisions such as Section 179 or bonus depreciation let you deduct an asset’s full cost in year one; the deduction still lands in the functional category the asset belongs to, and the book depreciation continues its steady annual march on the financial statements.