Operating Income Formula: Where It Sits Between Gross and Net Profit

Operating income is the profit left after a business subtracts the costs of goods or services sold and the expenses of running its operations from net revenue. It sits between gross profit and net income on the income statement. That position matters: gross profit has not yet accounted for operating overhead, while net income also reflects items such as interest and income tax.

The operating income equation follows the order of the statement:

Net revenue − cost of goods sold = gross profit. Then gross profit − operating expenses = operating income.

Combined, the equation is operating income = net revenue − cost of goods sold − operating expenses. The difficult part is usually deciding which costs belong in each subtraction. A cost put on the wrong line can leave the final profit unchanged while misstating the operating subtotal.

Start with net revenue, then find gross profit

Net revenue is sales after deductions such as returns, allowances and discounts. It is the starting figure for this calculation, not the amount left after business expenses. From net revenue, subtract the cost of goods sold, sometimes called cost of sales. For a retailer, that may include the cost of merchandise sold; for a manufacturer, it may include production costs. A service business may show the direct cost of providing its services under a different label.

The result is gross profit. It shows what remains from sales after direct costs, before the broader costs of operating the business. The SEC’s guide to reading financial statements traces this sequence from net revenue through cost of sales to gross profit, then on to operating expenses.

Use costs from the same reporting period as the revenue. Do not subtract every inventory or equipment purchase just because cash went out then. Recognised expenses need not match the timing of payments.

Subtract the expenses of operating the business

Operating expenses support the business but are not included in cost of goods sold. They may appear as selling expenses, general and administrative expenses, research costs, or separate lines. Marketing and administrative payroll are familiar examples. Depreciation may also appear as an operating expense, although a business should check whether any depreciation associated with production has already been included in cost of sales.

Subtract these expenses from gross profit to reach operating income. The figure may be labelled income from operations or operating profit. In the SEC’s income-statement example, gross profit of 585,000 less operating expenses of 210,000 produces operating profit of 375,000. Interest expense and income tax appear below that subtotal.

Classification prevents double counting. Production pay already included in cost of goods sold should not also enter administrative payroll. Nor should depreciation already included in operating expenses be deducted again from a supporting note.

A small P&L example

Suppose a shop reports the following results for one year, in its reporting currency. It has 200,000 of net revenue and 110,000 of cost of goods sold, leaving 90,000 of gross profit. Its operating expenses are 12,000 for marketing, 35,000 for administrative payroll and 5,000 for depreciation. Those three expenses total 52,000, so operating income is 38,000.

The shop also records 3,000 of interest expense and 7,000 of income tax expense. Those amounts affect the result below operating income: 38,000 less 3,000 gives 35,000 before tax, and a further 7,000 leaves net income of 28,000. Interest is a financing cost in this example; income tax follows the pre-tax result. Neither belongs in the 52,000 of operating expenses used to calculate operating income.

Depreciation does belong above the operating-income line here because the example treats it as an operating expense. Its being a non-cash charge does not make it disappear from the income statement. The shop’s equipment purchase and its depreciation expense are different entries: the example includes the expense recognised for the year, not the entire cash price of equipment bought that year.

To check the calculation, subtract the three operating expenses from gross profit: 90,000 − 12,000 − 35,000 − 5,000 = 38,000. Starting from revenue gives the same result: 200,000 − 110,000 − 52,000 = 38,000. Gross profit is a subtotal, not extra revenue; 52,000 is the sum of the three expenses, not another deduction.

How to locate operating income on a real statement

First, identify the reporting period and the net sales or net revenue line. Follow the statement down to cost of sales and gross profit. Then find the operating-expense section and its subtotal, if one is provided. The operating-income line should follow those costs and precede interest and income tax in the straightforward presentation used here.

Real statements may group expenses differently. A line labelled “selling, general and administrative expenses” can combine several operating costs; another company may list them separately. Read the line labels and notes before calculating. If the statement already gives a total for operating expenses, use that total or add its components—never both. The FDIC’s small-business P&L guide presents the basic progression from sales through cost of goods sold, gross profit and overhead, illustrating why each line must be read in sequence.

If operating income is not displayed, calculate it from the reported gross profit and the relevant operating expenses. Check whether a cost has been included in cost of sales before assigning it to operating expenses. If the statement begins its lower section with other gains, interest or tax, stop before those lines. Do not work backwards from net income by adding back only tax while leaving interest or other below-the-line items unexamined.

One further distinction helps when reading a statement: operating income is an accounting profit subtotal, not cash generated by operations. Depreciation reduces the former even though the charge is not itself a cash payment in the period. A cash-flow statement answers a different question about money received and paid.

Operating income versus net income

Operating income asks what the business earned from its operations after direct costs and operating expenses. Net income continues through the remaining recognised items to the bottom line. In the shop example, the difference is 10,000: 3,000 of interest expense plus 7,000 of income tax expense. A business could therefore report positive operating income and much lower net income if its financing and tax costs are substantial.

The comparison is useful only when the same classifications are applied consistently. Moving a cost between cost of sales and operating expenses changes gross profit but, if it is still counted once above the operating-income line, does not change operating income. Moving a genuine operating expense below that line changes operating income even if net income stays the same. For that reason, the label and placement of an expense deserve as much attention as the arithmetic.

Why real-estate NOI is a different measure

In property analysis, net operating income, or NOI, refers to income generated by a property after its operating expenses. It is not simply another name for a company’s income from operations. The starting income, the unit being measured and the treatment of particular costs differ. The Office of the Comptroller of the Currency’s commercial real-estate handbook defines property NOI as annual gross income less operating expenses and specifies that those expenses exclude interest, principal, income taxes and depreciation.

That depreciation treatment is a clear warning against swapping the two figures. Depreciation reduced the shop’s operating income in the P&L example. It would not be treated the same way in the property NOI definition above. If a document says only “operating income,” check whether it is discussing a company income statement or a property’s performance before applying any formula.