How to Read an Income Statement as an Investor

Search the company in EDGAR and open the latest 10-K. Item 8 contains the audited financial statements, and the SEC's 10-K guide notes the income statement may be titled the statement of earnings or the statement of operations. The SEC's glossary also calls it a profit and loss statement. The latest 10-Q gives you a more recent quarter. If you start from a data site or an earnings headline, check the lines you rely on against the filed statement.

The SEC's beginners' guide to financial statements describes the income statement as a report of how much revenue a company earned over a specific period, usually a year or part of a year, and the costs and expenses tied to earning it. It reads from the top line down to the bottom line.

1. Revenue (the top line): often called gross revenues or sales. Net revenue is what remains after expected deductions such as sales discounts and returns.
2. Cost of sales: what it cost to produce the goods or services sold during the period.
3. Gross profit: net revenue minus cost of sales. The SEC guide also calls this gross margin.
4. Operating expenses: costs that support the business but cannot be tied directly to a product sold, such as administrative salaries, research, and marketing. Depreciation and amortization spread the cost of long-lived assets, like machinery, over the years they are used.
5. Income from operations: what is left after operating expenses, before interest and taxes.
6. Interest and taxes: interest income and interest expense are added or subtracted, then income tax is deducted.
7. Net income (the bottom line): the profit or loss for the period after all expenses.
8. Earnings per share (EPS): net income divided by shares outstanding. The SEC glossary separates basic EPS, which counts only issued and outstanding common shares, from diluted EPS, which also counts securities that could be converted into or exercised for common shares.

1. Revenue change: put this period next to the same period a year earlier. Note how much revenue moved before reading anything else.
2. Gross profit against revenue: did gross profit grow by a similar amount? If cost of sales grew faster than revenue, each sale kept less.
3. Operating expenses against revenue: check which expense lines grew faster than sales.
4. Operating margin: the SEC defines it as income from operations divided by net revenues. It shows, for each dollar of sales, what percentage was profit from operations.
5. Below the operating line: compare income from operations with net income. If the gap is large, check the interest and income-tax lines and the footnotes that explain them.
6. Basic against diluted EPS: a widening gap means more potential shares could claim the same earnings. The SEC glossary describes dilution as new shares leaving existing holders with a smaller ownership percentage.
7. Why it changed: read MD&A, where management explains results and the known trends and uncertainties behind them, then the footnotes for accounting policies and income taxes.

This is a hypothetical company. The numbers are invented only to show the arithmetic.

• Last year: net revenue $1,000 million, cost of sales $600 million, so gross profit is $400 million. Operating expenses are $250 million, leaving $150 million of income from operations, a 15% operating margin.
• This year: net revenue $1,200 million, cost of sales $780 million, so gross profit is $420 million. Operating expenses are $330 million, leaving $90 million of income from operations, a 7.5% operating margin.

Revenue grew by a fifth, and income from operations fell by 40%. That does not tell you the company is getting worse. It tells you what to look up: why cost of sales rose faster than revenue, which operating expense lines grew, and whether management describes those costs as one-time or ongoing. The answers belong in MD&A and the footnotes, not in a guess.

The SEC guide puts it plainly: an income statement can tell you whether a company made a profit, and a cash-flow statement can tell you whether it generated cash. The two are related but not equivalent, and no one financial statement tells the complete story. Pair it with the balance sheet to see what the company owes and owns at the end of the period.

There is also no single good margin. The SEC notes that desirable ratios vary by industry, so compare a company with its own earlier filings and with competitors' filings rather than with a rule of thumb. EPS is the link to valuation: the SEC's example of a $20 share price and $2 of EPS gives a P/E of 10, meaning the stock sells at 10 times earnings. That is a description of the price, not a judgment on whether it is right.

Search companies and tickers in Benson to see the business summary, bull and bear cases, risk context, and data date, then check the income statement for the claims that matter. The 10-K reading order shows where the statements sit in the annual filing, and the earnings-report guide covers the quarterly update, including adjusted figures. A useful first exercise: for one company you follow, write down revenue, income from operations, and operating margin for the last two years, then find the sentence in MD&A that explains the change.