Net profit margin tells you how many rupees of profit a company keeps from every ₹100 of sales, after paying all costs, interest and tax. It is one of the simplest ways to judge how profitable a business really is. In this guide you will learn the net profit margin formula, what a good margin looks like, how to spot a trend and where the ratio can mislead you.
Educational content only. This is not investment advice. All company figures below are hypothetical.
Key Takeaways
- Net profit margin = Net profit ÷ Revenue × 100.
- A higher margin means the company keeps more of each sale.
- Compare only within the same industry. Margins differ a lot between sectors.
- A steady or rising margin over years is a good sign. See also ROE and EPS.
What Is Net Profit Margin?
Imagine a shop that sells goods worth ₹100 and finally keeps ₹8 after paying suppliers, staff, rent, interest and tax. Its net profit margin is 8%. The ratio answers one clear question: out of every rupee of sales, how much is truly left for the owners?
Net Profit Margin Formula
Net Profit Margin = Net Profit ÷ Revenue × 100
- Net profit: the final profit after all expenses, interest and tax (profit after tax).
- Revenue: total sales, also called turnover.
Worked Example
A hypothetical company has revenue of ₹2,000 crore and net profit of ₹160 crore.
- Net profit margin = 160 ÷ 2,000 × 100 = 8%
This means the company keeps ₹8 from every ₹100 of sales.
Reading the Trend: Five Years of Margins
| Year | Revenue (₹ crore) | Net profit (₹ crore) | Net margin |
|---|---|---|---|
| Year 1 | 1,000 | 70 | 7.0% |
| Year 2 | 1,200 | 90 | 7.5% |
| Year 3 | 1,400 | 105 | 7.5% |
| Year 4 | 1,700 | 135 | 7.94% |
| Year 5 | 2,000 | 160 | 8.0% |
Sales doubled and the margin also improved from 7.0% to 8.0%. That is a healthy pattern: growth with better profitability. If sales grow but the margin keeps falling, the company may be buying growth with discounts or rising costs.
What Is a Good Net Profit Margin?
| Margin | General reading |
|---|---|
| Below 5% | Thin; little room for error |
| 5% to 10% | Average for many businesses |
| 10% to 20% | Good |
| Above 20% | Excellent; often asset-light or branded businesses |
A retailer or trader may live on a 2% to 4% margin, while a software or pharma company may earn 15% to 25%. A low margin is not bad by itself if the business sells huge volumes quickly.
Gross, Operating and Net Margin
| Margin | Profit used | What it shows |
|---|---|---|
| Gross margin | Revenue minus cost of goods | Pricing power and production cost |
| Operating margin | EBIT or EBITDA | Core business efficiency (see EBITDA vs EBIT) |
| Net margin | Net profit | What finally reaches shareholders |
How to Use It Step by Step
- Take revenue and net profit from the profit and loss statement.
- Calculate the margin for the last 5 years.
- Check whether it is stable, rising or falling.
- Compare with 3 to 5 direct competitors.
- Find out why it changed: raw material costs, pricing, one-time gains or tax.
Pros and Cons
| Pros | Cons |
|---|---|
| Very easy to calculate | One-time gains can inflate it |
| Shows profitability in one number | Cannot be compared across industries |
| Good for trend checks | Ignores cash flow and debt |
Common Mistakes
- Comparing a retailer with a software company
- Trusting one great year without checking one-time income
- Ignoring a falling margin because sales are growing
- Skipping cash flow vs profit
FAQs
What is a good net profit margin?
Above 10% is generally good, but it depends on the industry. Compare with direct competitors.
Can net profit margin be negative?
Yes. A negative margin means the company made a loss.
Is a high margin always better?
Usually, but check that it is not caused by a one-time gain such as an asset sale.
What is the difference between net margin and operating margin?
Operating margin ignores interest and tax. Net margin is after everything, so it shows the final profit.
Where do I find revenue and net profit?
In the quarterly or annual results on NSE or BSE.
Conclusion
Net profit margin shows how much of each sale turns into real profit. Track it over years, compare it with peers and confirm it with cash flow. For the full framework, read our fundamental analysis of stocks guide. For daily institutional flow figures, see the FII and DII data home page.
Disclaimer: Educational only, not investment advice. Figures are hypothetical. Verify data from official filings. Sources: NSE, BSE, Zerodha Varsity.
