Profit Margins
Profit margins show how much of each dollar of revenue a company keeps as profit. The three main ones are gross margin (after the cost of goods), operating margin (after operating expenses) and net margin (after everything, including interest and taxes).
Two companies can both sell $1 billion a year and be completely different businesses: one keeps $300 million as profit, the other $10 million. Profit margins reveal that difference. They show pricing power, cost control and how much room a company has when times get tough. This entry explains the three main margins, how to calculate them and how investors read them.
- Category
- Fundamentals and Macroeconomics
- Reading time
- 3 min
- Also called
- Profit margin, Gross margin, Operating margin
- Updated
Profit margins in plain words
The three main margins are gross margin (revenue minus cost of goods sold), operating margin (also minus operating expenses) and net margin (minus all expenses, including interest and taxes).1
Net profit margin is net income divided by total revenue — the profit kept per dollar of sales.2
Operating margin, also called return on sales, measures revenue left after operating expenses.3
How to calculate margins, step by step
Start with revenue
Total sales for the period. See Revenue.
Gross profit
Revenue − cost of goods sold.
Operating profit
Gross profit − operating expenses.
Net income
After interest, taxes and other items. See Net Income.
Divide by revenue
Each profit figure ÷ revenue × 100.
Compare
Against peers and the company's own history.
Worked examples
Example 1 — All three margins
40% / 16% / 10%Revenue $500m, cost of goods $300m, operating expenses $120m, interest and taxes $30m.
| Gross margin | ($500m − $300m) ÷ $500m = 40% |
| Operating margin | ($200m − $120m) ÷ $500m = 16% |
| Net margin | ($80m − $30m) ÷ $500m = 10% |
Each margin subtracts another layer of costs from revenue.1
Example 2 — Comparing companies
A keeps 7.5× moreCompany A: $1bn revenue, $150m net income. Company B: $1bn revenue, $20m net income.
| A net margin | 15% |
| B net margin | 2% |
Net margin shows how much profit each dollar of revenue produces.2
Example 3 — Margin squeeze
Margin almost halvedCosts rise 5% while prices stay flat. Revenue $100m, costs were $90m.
| Old margin | ($100m − $90m) ÷ $100m = 10% |
| New costs | $90m × 1.05 = $94.5m |
| New margin | 5.5% |
Thin margins leave little room: a small cost rise nearly halves profit. See Operating Leverage.
The three profit margins
| Aspect | Subtracts | Shows |
|---|---|---|
| Gross margin | Cost of goods sold | Pricing power, production efficiency |
| Operating margin | Plus operating expenses | Core business profitability |
| Net margin | Plus interest, taxes, other | What shareholders keep |
| See also | Return on equity | Return on Equity and Return on Assets |
How investors use profit margins
Comparing peers
Who runs the business more efficiently.
Spotting trends
Rising or falling margins over time.
Earnings analysis
Margin changes drive profit surprises. See Earnings Surprise.
Valuation
High-margin firms often earn higher multiples. See Price-to-Earnings Ratio.
Advantages and disadvantages
Advantages
- Simple, comparable percentages.
- Reveal cost structure and pricing power.
- Useful for trend analysis.
Disadvantages
- Vary widely by industry.
- One-off items can distort net margin.
- Say nothing about cash flow on their own.
Going deeper
Read as far as you need. Each level builds on the one before it.
Industry matters
Beginner
Software firms can have very high gross margins, while supermarkets run on thin ones. Compare within an industry. See Stock Market Sectors.
Operating margin as core health
Intermediate
Because operating margin excludes interest and taxes, it shows how profitable the core business is regardless of financing.3
Quality check
Advanced
Rising net margins driven by one-off gains or tax effects are less reliable than rising operating margins. See Quality of Earnings.
Common mistakes
Comparing across industries
Margins differ by business model.
Ignoring one-offs
Adjust for unusual items.
Mixing up margin and markup
Margin divides by price, markup by cost.
Looking at one year only
Trends matter more.
Check your understanding
Test yourself before moving on. Each answer comes with an explanation.
Key points to remember
- Margins show profit per dollar of revenue.
- Gross, operating and net margins subtract more costs at each step.
- Net margin = net income ÷ revenue.
- Compare margins within an industry.
- Trends matter more than a single figure.
Frequently asked questions
What is a good profit margin?
Why can net margin be negative?
Which margin matters most?
Further learning
- Net Income
The bottom line.
- Operating Leverage
How margins react to sales changes.
- Return on Equity and Return on Assets
Profitability relative to capital.
Sources
This article is written in our own words. The sources below support the specific facts, rules and figures marked with a number in the text. Links open the original publisher’s page.
- Corporate Finance Institute. Profit Margin (opens in a new tab) Checked .
- Corporate Finance Institute. Net Profit Margin (opens in a new tab) Checked .
- Corporate Finance Institute. Operating Margin (opens in a new tab) Checked .
Educational content, not financial advice. Examples use hypothetical prices and simplified costs; actual fees, margin rules and regulations vary by broker, market and country. We are not affiliated with any publisher linked above. Last reviewed . Report an error or request a source credit.