Apple's profit margins, live
From revenue to net income, line by line
Revenue (top line) = total sales before any costs are subtracted.
Gross Profit = Revenue minus Cost of Goods Sold. How much the core product earns before overhead.
Operating Income = Gross Profit minus operating expenses (rent, salaries, R&D). The true earning power.
Net Income (bottom line) = what remains after ALL costs, interest, and taxes. The profit for shareholders.
The net-margin formula
Net Margin = Net Income / Revenue
Find the four profit lines on a real income statement
Revenue shows size; net margin shows efficiency
Margin quality vs growth: which trajectory wins?
Going deeper: how the three statements link
Going deeper (optional). Up next: How the three financial statements move together — an advanced aside you can skip on first pass and come back to anytime. Continue when you're curious.
Going Deeper — the income statement, the balance sheet, and the cash flow statement all move together. If a company sells $100M of product but customers pay 90 days later, the income statement books $100M of revenue, the balance sheet adds $100M to accounts receivable, and the cash flow statement subtracts $100M from operating cash flow under "changes in working capital" — so operating cash flow is unaffected by the sale until customers pay. If the customer never pays and the receivable is written off eighteen months later, the income statement takes a bad-debt expense for $100M and the balance sheet removes the $100M receivable — but the cash flow statement is untouched, because no cash ever changed hands. Walking three statements through any single transaction is the cleanest test of whether you actually understand them. AI prompt: "Walk me through the three statements when this company books a $20M sale on credit, then writes it off as bad debt eighteen months later."
Gross margin and operating margin, defined
Two rungs of the ladder get their own names because analysts compare them constantly. Gross margin = Gross Profit / Revenue — the share of every sales dollar left after the direct cost of making the product, before overhead. Operating margin = Operating Income / Revenue — the share left after both direct costs and the operating expenses of running the business (rent, salaries, R&D), but before interest and taxes. Worked on one company: $380M revenue, $152M gross profit, $114M operating income gives a gross margin of 152 / 380 = 40.0% and an operating margin of 114 / 380 = 30.0%. Gross margin tells you how much pricing power the product has; operating margin tells you how much of that survives the cost of running the company. The ratios path compares gross, operating, and net margins side by side.
Sit with the ideas.
A company has $10B revenue and $2B net income. What is its net profit margin?
Buy after reading one balance sheet
Pull up a 10-K for a company you own (or want to own). Read just the balance sheet. Note three things: total cash, total debt, and shareholders' equity. Then paper-buy 5 shares and journal whether the balance sheet made you more or less confident.
Open paper portfolio →Practice mode — simulated trades, not investment advice.