What Is Gross Margin? A Plain English Guide
Gross margin tells you how much profit a company keeps from each sale before expenses. Here's what it means and why it matters.
What Is Gross Margin? A Plain English Guide
Gross margin is one of the most important numbers in any earnings report — and one of the most misunderstood. You'll see it in almost every company's results, whether it's Nike, Apple, or H&M. But what does it actually tell you?
The Simple Definition
Gross margin is the percentage of revenue a company keeps after paying for the cost of making its products or delivering its services.
The formula is:
Gross Margin = (Revenue − Cost of Goods Sold) ÷ Revenue × 100
If a company earns £100 in revenue and it cost £60 to make the products it sold, gross profit is £40. Gross margin is 40%.
That 40% is the money left over to pay for everything else — marketing, salaries, rent, taxes — before arriving at actual profit.
A Simple Example
Imagine a coffee shop sells a cup of coffee for £4. The coffee beans, milk, and cup cost £1. The gross profit on that cup is £3. The gross margin is 75%.
That 75% then has to cover the barista's wages, the rent on the shop, the electricity bill, and everything else. What's left after all that is net profit.
Why Gross Margin Matters
Gross margin tells you how efficiently a business makes money from its core activity. A higher gross margin means more of each sale drops through to cover costs and potentially become profit.
It reveals pricing power. Companies with strong brands — Apple, LVMH, Nike in its best years — can charge premium prices without proportionally higher costs, which expands gross margins.
It shows cost control. When raw material costs, manufacturing costs, or shipping costs rise, gross margins compress. When a company manages those costs well, margins hold or improve.
It's the first test of a business model. If gross margins are thin, there's very little room for the rest of the business to be profitable. If they're high, there's breathing room to invest in growth.
What's a Good Gross Margin?
It varies enormously by industry. Comparing a software company's gross margin to a supermarket's is meaningless — they operate completely differently.
| Industry | Typical Gross Margin | Why | |---|---|---| | Software / SaaS | 70–85% | No physical product, low cost to deliver | | Luxury goods | 60–70% | Premium pricing, brand power | | Sportswear (Nike, Adidas) | 40–55% | Physical product but strong brand | | Fast fashion (H&M, Zara) | 48–56% | High volume, efficient supply chain | | Automotive | 15–25% | Expensive to manufacture | | Supermarkets / Grocery | 20–30% | Thin margins, high volume |
Always compare a company's gross margin to its own history and to competitors in the same sector — not to companies in completely different industries.
Gross Margin vs. Net Margin
These two are often confused. Here's the difference:
Gross margin only subtracts the direct cost of making the product (materials, manufacturing, delivery).
Net margin subtracts everything — including salaries, marketing, rent, interest on debt, and taxes.
A company can have a healthy gross margin but a terrible net margin if its overheads are out of control. A company with thin gross margins has a very hard time reaching a good net margin at all.
How It Shows Up in Earnings Reports
When companies report earnings, they'll often say something like: "Gross margin contracted 200 basis points to 42.3%."
That means gross margin fell from 44.3% to 42.3%. It sounds small, but on billions in revenue, 200 basis points (2 percentage points) represents hundreds of millions of pounds in lost profitability.
Common reasons gross margins move:
- Tariffs — higher import costs hit the cost of goods
- Discounting — cutting prices to drive sales reduces margin
- Supply chain efficiency — smarter sourcing improves margin
- Product mix — selling more premium products improves margin; more budget products compresses it
- Currency — a stronger local currency can hurt companies that manufacture abroad
See It in Action
Gross margin appears in every earnings report on Ask AYO. Here are some recent examples:
- Nike Q3 FY2026: Gross margin fell 130 basis points to 40.2% — primarily due to US tariffs making imports more expensive. Without tariffs, margins would have been expanding.
- H&M Q1 FY2026: Gross margin improved 160 basis points to 50.7%, driven by better supply chain management and reduced end-of-season discounting.
- Lululemon Q4 FY2025: Gross margin fell 550 basis points to 54.9% — partly from promotional activity as they tried to move inventory.
In each case, the gross margin number told a different story about how the business was performing underneath the headline revenue figure.
The Bottom Line
Gross margin is the first test of how well a business converts sales into money it can actually use. A rising gross margin suggests improving efficiency or pricing power. A falling one is a warning sign — either costs are rising, prices are falling, or both.
It won't tell you everything, but no earnings report makes full sense without it.
Related Reading
We break down confusing financial terms into plain English. If you want to translate jargon while you read, try the free Ask AYO Chrome extension.
Confused by any of the terms in this article?
Highlight any financial term and get an instant plain-English explanation. Works on any website.
Try it freeGet it straight to your inbox
One email a week. Plain English. No jargon, no fluff.