Gross margin and net margin sound interchangeable, but they answer two completely different questions. Confuse them and you might celebrate a "healthy" 60% margin while your business quietly loses money. Here is exactly what each one measures, and when to use which.
Gross Margin: Your Product Economics
Gross margin answers: after paying for the product itself, how much of each dollar is left? It only subtracts cost of goods sold (COGS) — product costs, shipping, packaging, payment processing — not rent, salaries, or ads.
Gross Margin = (Revenue − COGS) ÷ Revenue
Net Margin: The Whole Business
Net margin answers: after paying for absolutely everything, how much profit is left? It subtracts COGS plus operating expenses (salaries, rent, tools), marketing, interest, and taxes.
Net Margin = (Revenue − COGS − Operating Expenses − Taxes − Interest) ÷ Revenue
Worked Example
A store does $100,000/month. COGS is $40,000. Operating expenses (ads, tools, salaries) are $45,000.
- Gross profit: $100,000 − $40,000 = $60,000 → 60% gross margin
- Net profit: $60,000 − $45,000 = $15,000 → 15% net margin
Both numbers are true. The 60% tells you the product economics are strong. The 15% tells you the overall business keeps a modest slice. If you only reported the 60%, you would be lying to yourself by omission.
Which One Matters More?
It depends on the decision:
- Pricing, suppliers, product mix: use gross margin. A weak gross margin can never be fixed by cutting overhead.
- Hiring, ad budgets, overall health: use net margin. It shows whether the whole machine produces profit.
Rough benchmarks: SaaS gross margins typically sit at 70–80%, e-commerce at 30–50%. Net margin varies far more — 5–20% is common for healthy e-commerce, while profitable SaaS can exceed 20%.
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