Net profit margin calculator

The calculation

Net profit margin formula

Net profit margin expresses bottom-line net income as a percentage of revenue. Use net sales and net income from the same accounting period.

Income-statement sequence and terminology follow the U.S. SEC’s guide to financial statements, which describes net profit as the amount left after operating costs, interest and income tax.

Find the right numbers

Revenue and net income must cover the same period

Use the revenue and net income lines from one monthly, quarterly or annual income statement. Do not divide annual net income by one quarter of revenue. If the statement reports net revenue after returns and allowances, use that net figure.

• Direct mode: enter reported revenue and bottom-line net income, including a negative number for a loss.
• Builder mode: start with revenue, subtract COGS and operating expenses, account for interest and other items, then subtract income tax.
• Keep classifications consistent: companies can present unusual or non-operating items differently, so follow the labels on the statement.

Three different questions

Gross margin, operating margin and net margin

Each margin stops at a different point on the income statement. They should not compete for the same search intent or be used interchangeably.

• Gross margin subtracts cost of goods sold from revenue.
• Operating margin also subtracts operating expenses, before interest and income tax.
• Net profit margin reaches the bottom line after interest, tax and other income or expenses.

A company can have a healthy gross margin and a weak net margin when overhead, borrowing costs or taxes consume much of its gross profit.

Worked example

$65,000 of net income on $500,000 of revenue

A business reports $500,000 of revenue, $260,000 of COGS, $150,000 of operating expenses, $15,000 of interest expense, $5,000 of other income and $15,000 of income tax. Net income is $65,000, producing a 13% net profit margin.

Interpret with context

What a negative or changing net margin means

A negative margin means the business reported a net loss for the selected period. A change in margin can come from pricing, sales mix, direct costs, overhead, interest, tax or one-time items. Compare like periods and investigate the income-statement lines behind the change.

There is no universal “good” net margin. Appropriate levels vary by industry, capital needs and business model. The target field is your planning assumption, not an industry benchmark.

Profit is not cash

Net income and cash flow answer different questions

The SEC notes that an income statement can show profit while the cash flow statement shows whether the company actually generated cash. Non-cash expenses, working-capital movements, investing and financing activity can make the two figures differ. Use this calculator for income-statement profitability, not cash forecasting.