Is Cost of Goods Sold an Operating Expense? COGS vs OpEx Rules

Cost of goods sold is not an operating expense. On both the income statement and a federal tax return, COGS and operating expenses sit in separate tiers and are deducted under different rules. COGS captures the direct cost of producing or acquiring the specific items you sell. Operating expenses cover the overhead of running the business around that production — rent, administrative salaries, marketing, insurance. Keeping them apart is required for accurate profit reporting and matters for how, and when, each cost reduces your taxable income.

What Actually Separates the Two

The dividing line is proximity to the product. COGS tracks what it costs to make or buy the items you sell. Operating expenses track what it costs to keep the business running around that production.

COGS costs are variable. A furniture maker who builds 500 tables spends roughly five times as much on lumber and direct labor as one who builds 100. Operating expenses are largely fixed or semi-variable — doubling your sales does not double your office lease or your bookkeeper’s salary. That behavioral difference is why the two categories tell you different things about a business: gross margin (revenue minus COGS, divided by revenue) measures production efficiency, while operating margin measures how efficiently you run the whole operation. Blending the categories would make it impossible to tell whether a profit problem comes from high production costs or bloated overhead.

Where Each Appears on the Income Statement and Tax Return

The income statement follows a fixed order. Revenue appears first. COGS is subtracted from revenue to produce gross profit. Operating expenses are then subtracted from gross profit to produce operating income. That layered presentation is required under generally accepted accounting principles, and publicly traded companies must file financial statements in this format with the SEC.¹

Federal tax forms mirror the same structure. Sole proprietors report COGS in Part III of Schedule C, and the result flows into gross profit at the top of the form; operating expenses appear separately in Part II.² Corporations calculate COGS on Form 1125-A, and the total flows to Line 2 of Form 1120.³ Operating expenses are reported on separate lines of the corporate return.⁴ COGS reduces gross receipts before any operating expense deductions apply. Operating expenses are deducted separately as ordinary and necessary business expenses under Section 162.⁵

Timing is the other structural difference. COGS is tied to inventory: a cost sitting in inventory is not deducted until the goods are sold. Operating expenses are period costs, deducted in the year they are paid or incurred.

What Goes Into COGS

Federal regulations spell out what belongs in this category: raw materials that physically become part of the finished product, direct labor wages for workers on the production line, and the cost of goods purchased for resale.⁶ Any business where making, buying, or selling merchandise drives income must generally track inventory and account for these direct costs.⁷

Typical COGS items:

Raw materials that become part of the finished product — steel, lumber, fabric, electronic components, ingredients
Direct labor wages for employees who physically assemble, manufacture, or process products for sale
Wholesale merchandise bought for resale by retailers and distributors
Freight-in — shipping costs to receive materials at your production facility
Factory overhead directly tied to manufacturing, such as production equipment maintenance and factory utilities

What Goes Into Operating Expenses

Operating expenses are the ordinary and necessary costs of carrying on the business itself. Section 162 allows deduction of expenses including reasonable salaries, travel, and rent on business property.⁵ The implementing regulations list management expenses, advertising, insurance premiums, supplies, and business vehicle costs among common examples.⁸

Typical operating expense items:

Rent and utilities for office or storefront space
Administrative salaries — office staff, managers, accountants, and other non-production employees
Marketing and advertising
Business insurance premiums
Office supplies and equipment
Software subscriptions used for business operations, expensed in the period incurred
Legal, accounting, and consulting fees

The Gray Area: Indirect Production Costs

Some costs support both production and general operations. A factory building’s electricity, for example, powers the assembly line and the attached office. Section 263A, the uniform capitalization rules, requires certain businesses to capitalize both direct costs and an allocated share of indirect costs into inventory rather than expensing them immediately.⁹

Under those rules, costs such as factory rent, production equipment depreciation, quality control, and certain taxes must be allocated between inventory and current-period expenses. The portion allocable to production becomes part of COGS instead of an operating expense. Interest costs receive special treatment and are capitalized only for property with a long useful life or an estimated production period exceeding two years.⁹ Small business taxpayers meeting the gross receipts test under Section 448(c) are exempt from these rules, as are freelance authors, photographers, and artists with respect to their creative expenses.¹⁰

Service Businesses

If your business does not produce, purchase, or sell merchandise, you generally do not report COGS at all. A consulting firm, law practice, or marketing agency reports every cost, including employee wages, as an operating expense on the main expense lines of Schedule C or Form 1120. The IRS test is direct: COGS applies when the production, purchase, or sale of merchandise is an income-producing factor for your business.²

Mixed businesses split the difference. A restaurant sells a service (preparing and serving food) and tangible goods (the food itself). Ingredient and food supply costs go in COGS; server wages and dining room rent are operating expenses. A landscaping company that installs sod, pavers, and plants reports those material costs as COGS and its administrative overhead as operating expenses.

Why the Classification Matters

Putting a cost in the wrong tier does not change your total expenses, but it distorts gross profit and can create tax timing problems. If you record a production cost as an operating expense, your COGS is understated and gross profit looks stronger than it is. Classify an operating expense as COGS and the reverse happens.

The tax exposure is the timing gap. COGS is deducted only when the underlying goods are sold. Section 162 operating expenses are deducted in the year paid or incurred.⁵ Treating an inventory cost as a current operating expense pulls the deduction into the current year instead of waiting for the sale, which understates taxable income for that year.

The IRS can impose an accuracy-related penalty when a return understates taxable income through negligence or disregard of the rules, and interest runs on the penalty until it is paid.¹¹ Consistent misclassification can also draw closer examination if your gross margin looks unusual against industry norms.

1
U.S. Securities and Exchange Commission. Public Companies
2
Internal Revenue Service. Instructions for Schedule C (Form 1040)
3
Internal Revenue Service. Form 1125-A – Cost of Goods Sold
4
Internal Revenue Service. Instructions for Form 1120
5
Office of the Law Revision Counsel. 26 USC 162 – Trade or Business Expenses
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eCFR. 26 CFR 1.471-1 – Need for Inventories
7
Office of the Law Revision Counsel. 26 USC 471 – General Rule for Inventories
8
eCFR. 26 CFR 1.162-1 – Business Expenses
9
Office of the Law Revision Counsel. 26 USC 263A – Capitalization and Inclusion in Inventory Costs of Certain Expenses
10
Federal Register. Small Business Taxpayer Exceptions Under Sections 263A, 448, 460, and 471
11
Internal Revenue Service. Accuracy-Related Penalty