Gross, operating and net margin

Give each margin a clear meaning

Gross margin uses gross profit after the direct costs classified as cost of revenue. Operating margin uses operating income after operating expenses. Net margin uses the applicable net-income line after additional items such as interest and taxes. Each divides its profit amount by the same period's revenue.

Read the company's presentation for cost classifications and whether net income refers to the consolidated company or income attributable to particular shareholders. The SEC's statement guide introduces the income statement; the exact issuer lines determine your calculation.

An adjusted operating margin is a different measure from the reported accounting figure. Reconcile exclusions before comparing it with another company's reported result.

Calculate three margins from one statement

Assume no other income, expenses or noncontrolling interests. Gross profit is 200 − 120 = 80, so gross margin is 40%. Operating income is 80 − 50 = 30, so operating margin is 15%. Net income is 30 − 6 − 4 = 20, so net margin is 10%.

These percentages describe different stages of the same invented result. They are not industry targets. A 40% gross margin does not imply 40% of sales is available to shareholders.

Locate the driver of a change

If gross margin holds at 40% while operating expenses rise from 50 to 60 million on the same 200 million of sales, operating income falls to 20 million and operating margin to 10%. That points you toward operating costs rather than direct production costs.

Alternatively, interest or taxes could change net margin while gross and operating margins remain stable. Investigate the relevant line and notes before attributing the result to pricing power or management execution.

A move from 15% to 10% is a drop of 5 percentage points. It is also a one-third proportional decline in the margin. Use percentage points when describing the difference between two percentages so the reader knows which comparison you mean.

Check whether the comparison fits

Business models classify costs differently. Banks and some other financial businesses may not present gross profit as a useful comparable subtotal. Product mix, geography, accounting policies and one-time items can also change what a margin means.

In ScalarQuant's Financials view, review the available revenue, gross profit, net income and net-margin series. The app can show gross profit as not applicable or not reported; do not interpret an omitted series as a zero margin. For operating margin and adjustments, inspect the original income statement and notes.

Use growth and profit together and keep cash-flow margin separate. A positive accounting margin does not establish cash collection or an attractive share price.