How to Read an Income Statement
The income statement tells the story of a period — usually a quarter or a year — as a staircase: revenue at the top, each layer of cost subtracted in turn, and net income at the bottom.
Work down the staircase slowly. Revenue minus the cost of goods sold gives gross profit, whose margin reveals pricing power and production efficiency. Subtracting operating expenses — research, marketing, administration — gives operating income, the cleanest measure of how the core business performed before financing decisions intrude.
Below operating income sit interest and tax. Two companies with identical operating income can report very different net income if one carries heavy debt or operates in higher-tax jurisdictions. That is precisely why analysts often compare companies at the operating line and only then adjust for financing.
One year of an income statement is a photograph; five years are a film. Look for revenue growing faster than costs, gross margin stable or expanding, and operating expenses growing more slowly than sales — the pattern called operating leverage. Check the notes for one-off items before celebrating or panicking about any single year, because filings bury genuinely unusual gains and losses in plain sight there.
Putting it into practice
Practise on the percentage version. Analysts often restate an income statement with every line expressed as a percentage of revenue — a common-size statement — because it makes structure visible at a glance: if the cost of goods sold absorbs sixty percent this year against fifty-five percent five years ago, something real has changed in production economics or pricing, whatever the absolute growth in dollars suggests. You can build this view yourself from the multi-year tables on our company pages in a few minutes, and it is the single fastest way to move from reading an income statement to analysing one.
A worked example from a real filing
Abstract definitions stick better with a real number attached. Take Nvidia Corp (NVDA): in fiscal 2026 it reported revenue of $215.94 billion in its annual 10-K filing, as republished in the SEC EDGAR company facts dataset retrieved in October 2026. Open its company page and you can place that figure next to the same company's net income, operating cash flow, total assets and diluted earnings per share for the same year — the relationships between the measures, not any single one of them, are where understanding lives. Then compare it with peers in the rankings, where the same measures are lined up across the largest filers.
For the full set of plain-English explainers, return to the Learn index, and for exactly how this site selects and labels figures, read the methodology page.