Gross Margin: The First Number That Tells You What Kind of Business You're Looking At

Gross margin — (Revenue minus Cost of Goods Sold), divided by Revenue — is one of the fastest, most revealing numbers to calculate about any company, because it captures the basic economics of the product or service itself, before any of the other spending decisions a company makes. It answers a simple question: after paying only the direct cost of producing or delivering what was sold, how much of each revenue dollar is left over to cover everything else — R&D, marketing, administrative costs, and ultimately, profit?

Gross margin varies enormously and predictably by business model. Software companies often report very high gross margins, frequently 70-90% or more, since delivering an additional copy of an already-built product costs relatively little. Grocery retailers and commodity manufacturers, by contrast, often run considerably lower gross margins, since they must physically purchase and deliver each additional unit sold — a structural difference in the business model itself, not a sign that one company is simply "better run" than the other.