How to Read an Income Statement

An income statement is a funnel. Revenue enters at the top, costs are subtracted in categories, and what remains at each stage is a subtotal worth understanding on its own. Every public company files one in the same broad order, which makes companies comparable even when their businesses are not.

The examples below use Apple's fiscal 2024 annual figures exactly as reported to the SEC, in millions of dollars. Real numbers make the relationships concrete in a way that placeholders cannot.

Revenue is the total value of goods and services delivered to customers during the period. It is recognized when the company fulfills its obligation, not necessarily when cash arrives, which is the central idea of accrual accounting and the reason profit and cash flow differ.

Two cautions apply when comparing companies. First, terminology varies: net sales, total revenues, and total net revenue can all appear, and for some businesses they mean genuinely different things. Banks report revenue net of interest expense, and a retailer's total revenue may include membership income that net sales excludes. Second, growth matters more than level. A company at $391 billion growing 2% and one at $10 billion growing 40% are entirely different investments.

Cost of revenue, often called cost of goods sold, covers the direct cost of producing what was sold: materials, manufacturing, and the cloud hosting behind a software product. What remains is gross profit, and dividing it by revenue gives gross margin.

Apple kept $180.7 billion of its $391.0 billion in revenue after direct costs, a 46.2% gross margin. That single number carries a lot of information: it reflects pricing power, product mix, and manufacturing efficiency all at once. Software companies routinely exceed 75% because copying software costs almost nothing; grocers operate near 25% because the goods themselves dominate.

Below gross profit sit the costs of running the business rather than producing the product. The two standard categories are research and development, and selling, general and administrative, which bundles sales, marketing, legal, finance, and executive costs.

Apple spent $31.4 billion on R&D and $26.1 billion on SG&A, leaving operating income of $123.2 billion. Operating income, also called operating profit or EBIT, is arguably the most useful line on the statement, because it measures the profitability of the actual business before financing decisions and tax strategy enter the picture. Two companies with identical operations but different debt loads have similar operating income and very different net income.

R&D as a percentage of revenue is worth tracking over time. Rising R&D with flat revenue suggests investment that has not paid off yet, or a treadmill the company cannot step off.

Between operating income and net income sit items unrelated to operations: interest paid on debt, interest and investment income, one-time gains or losses, and income taxes. Apple's $123.2 billion of operating income became $93.7 billion of net income, with income taxes accounting for most of the difference.

Net income is the headline number and the most manipulable one. It absorbs every accounting choice made above it, plus one-time events that say nothing about next year. A company can post record net income by selling a building. This is why analysts examine the quality of earnings rather than just the amount, and why the cash flow statement is the natural next document to read.

Earnings per share divides net income by shares outstanding, turning a company-level number into a per-share one. Apple's $93.7 billion across about 15.41 billion diluted shares produced diluted EPS of $6.08.

Diluted EPS, which assumes all convertible securities and employee stock options become shares, is the conservative figure and the one to use. The denominator deserves as much attention as the numerator: a company whose net income grows 5% while its share count grows 6% has delivered falling EPS despite rising profits. Buybacks work in reverse, raising EPS without any operational improvement at all.

EPS is also the input to the P/E ratio, which is where the income statement connects to what you actually pay for the stock.

Absolute dollars make companies of different sizes incomparable. Converting every line to a percentage of revenue, sometimes called common-size analysis, fixes that and takes seconds.

A single year of margins tells you little. The same margins across five or ten years tell you whether a business is strengthening, holding, or quietly eroding. Our company research pages chart these directly from filings across the full available history, which is the comparison that matters.

Revenue growing faster than receivables. If accounts receivable, found on the balance sheet, grows much faster than revenue, the company may be booking sales it has not collected.

One-time items that recur. A restructuring charge every year for five years is not one-time; it is a cost of doing business that management prefers to exclude.

Stock-based compensation. It is a real expense that appears in GAAP operating expenses and is almost always excluded from adjusted figures. Apple recorded $11.7 billion of it in fiscal 2024, roughly 3% of revenue. At many software companies the figure exceeds 15%, which changes the picture entirely.