Module 5 · Financial Statements · Lesson 3

How to Read an Income Statement

An income statement shows revenue and expenses over a stated period, ending with profit or loss. Follow the subtotals in order and read the notes before deciding what a change means.

Quick answer

What does an income statement measure?

It reports revenue, expenses, gains, losses, and resulting earnings for a quarter or year. It uses accrual accounting, so reported earnings are not the same as cash received. Check the reporting period and units at the top, then trace how each major cost reduces revenue.

Where do you find the income statement?

In a U.S. public company’s Form 10-K or 10-Q, open the financial statements section and look for a title such as “Consolidated Statements of Operations” or “Statements of Income.” Different companies may use different labels and line items. The annual 10-K contains audited statements; the quarterly 10-Q usually contains unaudited interim statements. Read the accompanying notes, which are part of the financial statements.

How do revenue, gross profit, and operating income connect?

Revenue is the amount recognized from goods or services under accounting rules. Subtract the company’s reported cost of goods sold or cost of revenue to get gross profit, where that subtotal is presented. Subtract operating costs such as research, sales, and administration to arrive at operating income or loss. Line labels and whether a gross-profit subtotal is shown vary by business. Read the notes rather than assuming two companies classify every cost alike.

How do you get from operating income to net income?

Items outside operations, such as interest and other gains or losses, affect income before tax. Income tax expense or benefit then contributes to net income or loss. Some statements separately show earnings attributable to different owners. Earnings per share divides earnings available to common shareholders by an appropriate weighted-average share count; diluted earnings per share considers potentially dilutive shares under accounting rules. A higher earnings-per-share figure can reflect changing share count as well as changing profit.

How does a simple example work?

In this illustrative example, a company reports $100 of revenue, $60 of cost of revenue, and $25 of operating expenses. Gross profit is $40 and operating income is $15. If net interest and other items reduce income by $3 and tax expense is $2, net income is $10. These are invented figures to show the order of calculation; a real filing can contain more lines and different presentations.

Dated US example: Apple’s income statement

Apple’s fiscal 2025 Form 10-K reports the following years ended September 27, 2025 and September 28, 2024. All dollar figures are US$ millions. The dates describe fiscal year ends, not current market prices.

Apple consolidated statements of operations, selected lines
LineFY2025
Sep 27, 2025
FY2024
Sep 28, 2024
Net sales$416,161$391,035
Cost of sales$220,960$210,352
Gross margin dollars$195,201$180,683
Operating income$133,050$123,216
Net income$112,010$93,736

Try the calculation: FY2025 gross margin dollars equal $416,161 − $220,960 = $195,201 million. Net income rose from $93,736 million to $112,010 million, but that change alone does not explain its causes. Read the tax and other-income lines and the filing notes before drawing a conclusion.

Apple sales and net income (US$ millions; common scale up to $416,161 million)
FY2024 sales · $391,035
FY2025 sales · $416,161
FY2024 net income · $93,736
FY2025 net income · $112,010

Source: Apple Inc., FY2025 Form 10-K, consolidated statements of operations. Figures are historical and illustrate how to read a filing, not a forecast or recommendation.

What do margins show, and what can they hide?

A margin divides a relevant profit measure by revenue for the same period: gross margin uses gross profit, operating margin uses operating income, and net margin uses net income. In the illustrative example above, those margins are 40%, 15%, and 10%. Compare each margin with the company’s own prior periods and a suitable peer only after checking accounting policies and business mix. A margin alone does not show cash generation, debt, or whether an unusual item will recur.

How do you compare income statements over time?

Write down each fiscal period, currency, and unit. Compare full year with full year, or quarter with a comparable quarter, and check whether there was a restatement or a change in accounting presentation. Look at both the amount and the percentage change in revenue, major expense categories, and earnings. Read management’s discussion and the notes for stated reasons. Treat a company explanation as a disclosure to examine, not a guarantee that a trend will continue.

Why can profit differ from cash flow?

Revenue and expenses can be recognized before or after the related cash changes hands, and some expenses such as depreciation do not use cash in the reporting period. Compare net income with net cash from operating activities in the cash flow statement, then read the reconciliation and relevant notes. Neither a positive profit nor a positive operating cash flow settles the full picture by itself.

What should make you read further?

Large swings in a cost category, a one-time gain or charge, changing share count, a new accounting estimate, or a restatement merit a closer look in the notes and MD&A. These are questions to investigate, not automatic buy or sell signals.

Check your understanding

1. In the illustrative example, what is gross profit?
A. $15. B. $40. C. $100.

Show answer and feedback

B. Subtract the $60 cost of revenue from $100 revenue to get $40.

2. Why might earnings per share rise while net income stays flat?
A. The weighted-average share count could fall. B. Cash flow must rise. C. Taxes always fall.

Show answer and feedback

A. Earnings per share depends on both earnings and the relevant share count.

3. Which comparison is most like-for-like?
A. A full year against one quarter. B. Figures with different units. C. The same fiscal period across years, after checking policy changes.

Show answer and feedback

C. Period and unit checks reduce misleading comparisons.

Why question: Why should you read the cash flow statement alongside an income statement?

Show a sample explanation

Accrual earnings and cash movements can differ in timing and because of noncash items. The cash flow statement helps explain that difference.

Trace Apple’s income statement in a filing

Open the SEC EDGAR page prefilled for Apple and select its latest 10-K. Find the consolidated income or operations statement. Record the fiscal year and units, then locate net sales or revenue, total operating expenses, net income, and diluted earnings per share. Find one related note or MD&A passage that helps explain a change. Use the live filing; no fixed Apple figure in this lesson is current by design.

Where can you check the accounting and filing basics?


End of Lesson · Continue to the Balance Sheet

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Sources and reference material

Primary sources and original reference material for the concepts discussed on this page.

References added 14 October 2026.

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AI responses are for educational purposes. Always verify with official course materials.

This lesson teaches a concept. It is general education, not advice about your money. Before you act on anything you learn here, speak to someone licensed.

This lesson teaches a concept. It is general education, not advice about your money. Before you act on anything you learn here, speak to someone licensed.