Shopify

Why we picked it This is the cleanest plain-language separation of the two margins we found, and it walks through both formulas with actual dollar numbers instead of jargon. It is written for operators who are not finance people, which is exactly where most early founders sit. Treat it as your starting point for getting the definitions straight before you decide which number to steer by.

Contribution Margin vs. Gross Margin: What's the Difference?

From Shopify by Shopify About 8 minute read

• Gross margin subtracts the direct cost of producing the good or service, while contribution margin also subtracts the variable costs of each sale (sales commissions, shipping, transaction fees), so contribution margin is almost always the lower and more honest number.
• The worked example makes it concrete: a product with 20 in net sales and 10 in variable costs has a 50 percent contribution margin, and the article shows the gross margin math on a separate case so you can see how the two diverge.
• The higher your contribution margin, the more of each sale is left to cover fixed costs like payroll and rent, which is why founders watch it when pricing and deciding what to sell more of.