Financial literacy and accountingModule 4, lesson 13 of 19
Profit margins and what they reveal
How to calculate gross, EBITDA, operating and net margins, how to compare them over time and with similar companies, and what rising or falling margins can mean.
In this lesson
- Calculate gross, EBITDA, operating and net margins from an income statement.
- Compare margins across years and explain possible reasons for a change.
- Explain why margins differ between industries and business models.
- Show why faster revenue growth with falling margins can mean lower profit.
Builds on
- Operating profit, EBITDA and net profitEach margin divides one of the levels of profit by revenue.
On this page
In simple terms
A profit margin is a level of profit divided by revenue. It shows how much profit each ₹100 of sales produces, which makes companies of different sizes, and years of different sizes, comparable. The revenue, expenses and profit lesson introduced the idea; this lesson uses it to read a company properly.
Gross margin = gross profit ÷ revenue × 100
EBITDA margin = EBITDA ÷ revenue × 100
Operating margin = operating profit (EBIT) ÷ revenue × 100
Net margin = net profit ÷ revenue × 100
Each margin answers a different question:
- Gross margin: how much the company earns over the direct cost of what it sells. It reflects pricing power and input costs.
- EBITDA and operating margins: how much is left after running the business, including staff, rent, marketing and, for operating margin, depreciation.
- Net margin: what finally reaches shareholders, after interest, other income, exceptional items and tax.
Worked example
Worked example: Kaveri Pumps' margins
Using the levels of profit from the previous lesson (₹ crore, revenue 1,200):
| Gross margin: 540 ÷ 1,200 | 45.0% |
|---|---|
| EBITDA margin: 220 ÷ 1,200 | 18.3% |
| Operating margin: 170 ÷ 1,200 | 14.2% |
| Margin before exceptional items and tax: 160 ÷ 1,200 | 13.3% |
| Net margin: 150 ÷ 1,200 | 12.5% |
Out of every ₹100 of pumps sold, ₹55 goes on materials, about ₹27 on staff and other running costs, about ₹4 on depreciation, and ₹12.50 ends up as net profit, with the one-off land sale helping that last figure.
Reading a change in margins
Margins become most useful when you follow them over several years and ask why they moved.
| What you see | Possible explanations to check |
|---|---|
| Gross margin rising | Higher prices, cheaper raw materials, a shift towards more profitable products |
| Gross margin falling | Rising input costs not passed on, price competition, a shift to cheaper products |
| Operating margin rising faster than gross margin | Overheads growing more slowly than sales, a sign of operating leverage |
| Net margin moving differently from operating margin | Changes in interest, other income, exceptional items or the tax rate |
A margin change is a clue, not a conclusion. A rising margin driven by a temporary fall in raw material prices may reverse; one driven by stronger pricing power may last. The management discussion section of the annual report and the notes usually give the reason, which you should then test against the numbers.
Why margins differ between businesses
Margins depend heavily on the business model, so they are only meaningful when compared with similar companies.
- A supermarket may have a thin net margin, perhaps a few percent, but sell its stock many times a year.
- A software company may have a very high gross margin, because one more copy of the software costs almost nothing to deliver.
- A commodity producer's margins swing with the price of what it sells, which it does not control.
A low-margin business is not automatically worse than a high-margin one. What matters in the end is how much profit the business earns on the money invested in it, a measure covered in the fundamental analysis path.
Growth and margins together
Revenue growth gets most of the attention, but profit is revenue multiplied by margin.
Worked example: Fast growth with falling margins
| Company A: revenue 100 → 125, net margin 15% → 10% | profit ₹15 crore → ₹12.5 crore |
|---|---|
| Company B: revenue 100 → 108, net margin 15% → 16% | profit ₹15 crore → ₹17.3 crore |
Company A grew its sales three times as fast, yet its profit fell about 17% while Company B's rose about 15%. Growth bought with discounts or heavy spending can destroy profit.
Why it matters
Margins turn an income statement into a story about a business: whether it can charge more than its costs, whether it is getting more efficient as it grows, and whether its profit depends on things outside its control. They are also the first place where a deteriorating business shows up, often before revenue falls.
Limitations
- Margins depend on how a company classifies its costs, so check that you are comparing like with like.
- A margin says nothing about how much capital the business needs to earn it.
- One year's margin can be distorted by one-off items, input price swings or acquisitions. Use several years.
- Net margin can be flattered by other income, exceptional gains or a low tax rate.
Common mistakes
- Comparing margins across unrelated industries. A retailer and a software company will never look alike.
- Assuming a higher margin always means a better business. Capital needs and growth matter too.
- Celebrating revenue growth without checking margins.
- Reading net margin without removing one-offs.
Try it yourself
- For any listed company, calculate gross, EBITDA, operating and net margins for the last three years.
- Which margin changed the most, and what explanation does the annual report give?
- Repeat the calculation for a competitor and compare. Where do the two businesses differ most?
Key takeaways
- A margin is a level of profit divided by revenue, showing profit per ₹100 of sales.
- Gross margin reflects pricing and direct costs; operating margin adds overheads and depreciation; net margin adds interest, other income, one-offs and tax.
- Compare a company's margins with its own history and with similar businesses, never with unrelated industries.
- A change in margin is a clue, not an explanation. Find out whether it came from prices, costs, the mix of products or one-offs.
- Growth with falling margins can leave profit lower than slower growth with stable margins.
Check your understanding
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Terms used in this lesson
- Profit margin
- A profit expressed as a percentage of revenue, showing how much profit each ₹100 of sales produces.
- Gross margin
- Gross profit as a percentage of revenue. It reflects how much a company earns over the direct cost of what it sells.
- Operating margin
- Operating profit as a percentage of revenue. It shows how much of each ₹100 of sales is left after all operating costs.
- EBITDA
- Earnings before interest, tax, depreciation and amortisation, a rough measure of the profit from a company's operations.
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This lesson is general education, not investment advice. Examples use made-up or clearly dated figures to explain ideas; they are not recommendations. Read the disclaimer.