How to Read an Income Statement: 7 Steps, Walked Through Apple's Real 10-K

Michael Whitman · Trading since 2017, full-time since 2020 · YouTube creator, 137K subscribers · Published 2026-09-08 · Updated 2026-11-02 · Reviewed 2026-11-01

Read an income statement from the top down, one deduction at a time, with last year’s column open next to this year’s. Each subtotal answers its own question, and the answers can disagree: in the filings of 509 large SEC filers for fiscal 2025, the bottom line and the operating line pointed in opposite directions at 90 of them.

This page walks through the seven steps on a real filing, Apple’s 10-K for the year ended 27 September 2025, using the exact figures Apple reported. The income statement page explains what the document is; this one is about reading it.

Before you start

The same statement from a year earlier, because every line is a comparison. A 10-K prints two or three years side by side, so the comparison is already on the page. A margin of 32% means nothing until you know whether it was 30% or 35% the year before.

A view on whether you are reading for growth or for margin. Revenue growth and margin can move apart, and which one matters depends on the business and on your question.

The notes, since the largest single-line items are usually explained only there. A tax line that jumps or a “non-operating” line that flips sign has a paragraph behind it. The page on notes to the accounts covers how to find it.

The steps

1. Find the statement and set two years side by side

In a 10-K it is in Item 8, titled “statements of operations” (Apple’s) or “income statement.” Cover the oldest column and work with the latest two.

2. Compute revenue growth against the same period a year earlier

Use the prior year, not the prior quarter. Seasonal businesses look different every quarter, and a quarter-on-quarter change mostly measures the calendar.

3. Divide gross profit by revenue and compare the two years

That is gross margin, the cleanest measure on the page of what the product earns over its direct cost. Gross profit covers what moves it.

4. Divide each operating expense and operating income by revenue

Research, selling and administrative costs as a share of sales show whether the company around the product is getting more or less expensive to run.

5. Compare the change in net income with the change in operating income

If they differ by more than a few points, find the line responsible: interest, other income, or tax.

6. Read the tax rate and any line marked one-time in the notes

Divide tax by pretax income. A rate that jumps or drops by several points has a stated cause in the notes or in MD&A.

7. Check earnings per share against net income and the share count

Diluted earnings per share is net income spread over the weighted diluted share count. Buybacks shrink the count, so EPS can rise faster than profit.

A worked example: Apple’s fiscal 2025, line by line

Every figure below is from Apple’s 10-K for the year ended 27 September 2025, as tagged in its XBRL data, in millions of dollars. The arithmetic was checked: each subtotal equals the lines above it exactly.

Steps 2 and 3. Revenue grew 6.43% and cost of sales only 5.04%, so gross margin widened from 46.21% to 46.91% of sales. Apple calls this line “gross margin” rather than gross profit; it is the same subtotal.

Step 4. Research and development grew faster than sales (+10.14%), from 8.02% to 8.30% of revenue. Selling and administrative costs stayed close to 6.6% of sales. Operating income rose 7.98%, a margin of 31.97% against 31.51%. That is the business: a little more profitable per dollar of sales.

Step 5. Net income rose 19.50%, more than twice the operating line. Something below operating income did the work, and it was not “other income,” which was a $321 million expense, tiny at this scale.

Step 6. The tax line fell 30.35% while pretax income rose. The rate dropped from 24.09% to 15.61%.

Apple’s 10-K gives the reason in plain words: a $10.7 billion year-over-year decrease in the tax provision tied to the European Commission’s State Aid Decision. So most of the jump in net income is the absence of a one-time charge, not a better year for the iPhone.

Step 7. Diluted EPS rose 22.70%, more than net income, because the weighted diluted share count fell 2.62%, from about 15.41 billion to 15.00 billion shares.

The year before, the same tax line pointed the other way. In fiscal 2024 operating income rose 7.80% but net income fell 3.36%, from $96,995 million to $93,736 million.

Apple’s fiscal 2024 10-K describes “a one-time income tax charge of $10.2 billion, net” for the State Aid Decision. Adding $10.2 billion back is a rough reading, not a restated figure, but it puts fiscal 2024 net income near $103.9 billion and the tax rate near 15.83%, in line with the 14.72% of fiscal 2023.

A reader who stopped at net income saw a weaker year in fiscal 2024 and a boom in fiscal 2025. The operating line rose about 8% in both.

How to tell it worked

You can state all 6 margins (gross, operating and net, for 2 years) as percentages, without looking. For Apple’s fiscal 2025 that is 46.91%, 31.97% and 26.92% against 46.21%, 31.51% and 23.97%.

You can name the line that explains the gap between the change in operating income and the change in net income, and point to the note or MD&A paragraph that explains it.

You know the effective tax rate for both years and whether either one included a one-time item. For Apple: 15.61% and 24.09%, the higher one with the State Aid charge inside it.

And you know whether EPS grew faster than net income, and by roughly how much the share count fell. Apple’s diluted EPS grew 1.16 times as fast as its net income (22.70% against 19.50%) on 2.62% fewer shares.

What the bottom line hides, and where to look instead

Cash. Revenue is booked when earned, not when paid, and depreciation is subtracted without any money leaving. The cash flow statement starts from net income and undoes those items; how to read a cash flow statement covers that route.

Debt and what the company owns. A large profit and a heavy maturity schedule can sit side by side. That is in the balance sheet and its notes.

Where the profit went. Net income does not stay on the income statement. What is not paid out as dividends or spent on retiring shares is added to retained earnings, which is why the two statements have to agree.

Depreciation and share-based pay as separate lines. Apple, like many companies, spreads them through cost of sales and operating expenses instead of showing them on their own.

In fiscal 2025 Apple’s cash flow statement lists $11,698 million of depreciation and amortization and $12,863 million of share-based compensation, neither of which appears as its own row on the income statement.

The three margins as a quick check

Gross margin asks whether the product is priced above its direct cost. It moves with input costs, pricing and mix. Apple’s rose from 44.13% in fiscal 2023 to 46.91% in fiscal 2025.

Operating margin asks whether the whole company earns its keep. The operating income page shows how hard that line can swing when revenue turns, so it is the one to watch in a slowdown.

Net margin asks what was left after everything. It is the least stable of the three because tax, interest and one-time items land there. Apple’s net margin went from 25.31% to 23.97% to 26.92% in three years while its operating margin rose each year.

The original data

Apple is not an odd case. The SEC’s XBRL frames hold each filer’s reported operating income and net income for the fiscal year closest to each calendar year.

Taking filers present in all four files, with operating income of at least $500 million in fiscal 2024 and with operating income and net income above zero in both years, left 523 filers. Fourteen of those were dropped because their figures are already inside another filer in the sample: consolidated subsidiaries such as CCO Holdings (inside Charter) and Northern States Power (inside Xcel Energy), carve-outs reported before a spin-off, and one row that repeated another company’s figures. That leaves 509 companies.

A handful of net income values the SEC file records in millions rather than dollars were scaled to dollars. Losses were left out because a percentage change across zero has no meaning.

At 90 of the 509 (17.68%), net income moved the opposite way from operating income. At 66 (12.97%) the operating line rose while net income fell, and at 24 (4.72%) the operating line fell while net income rose. At 255 (50.10%) both rose and at 164 (32.22%) both fell.

Even when the direction matched, the size often did not. The median gap between the two percentage changes was 7.02 percentage points. At 198 companies (38.90%) it was 10 points or more, and at 115 (22.59%) it was 20 points or more. Apple’s fiscal 2025 gap, 19.50% against 7.98%, sits in the 10-plus group.

What this sample does not show is which line caused each gap. Tax, interest, investment gains and one-time charges all sit between the two subtotals, and finding the culprit takes step 6 on each filing. The full list of companies and changes is in the data file linked above.

When it fails

Reading only the bottom line. It is the line most moved by things that are not the business. Apple’s fiscal 2024 and 2025 net income figures point to a bad year and a great one; the operating line says two similar years.

Comparing consecutive quarters. That measures the season, not the trend.

Taking “one-time” on trust. A charge labeled one-time is fine once. The same kind of charge in three straight years is a running cost. Check the prior two 10-Ks.

Reading margins as levels instead of directions. A 32% operating margin is strong or weakening depending on where it was last year.

Treating EPS growth as profit growth. When the share count is falling, EPS outruns net income; when new shares are issued, it lags.

Treating profit as cash. They differ, sometimes by a lot, and only the cash flow statement shows how.

Questions people ask

What should I look at first on an income statement?

Revenue and its change from the same period a year earlier, then gross margin. Those two say whether the business is growing and whether the product earns more than it costs to make.

Is a profit and loss statement the same as an income statement?

Yes. “P&L,” “statement of operations” and “statement of earnings” are names for the same document. Apple’s 10-K uses “consolidated statements of operations.”

Why did net income rise more than revenue?

Usually because a line below operating income changed: a lower tax rate, less interest, or an investment gain. In Apple’s fiscal 2025, the tax provision fell 30.35% after a one-time charge the year before.

How do I calculate the three margins?

Divide gross profit, operating income and net income by revenue. For Apple’s fiscal 2025 that gives 46.91%, 31.97% and 26.92%.

Why can a company show a profit and still run short of cash?

Because the income statement counts sales when earned and costs when incurred, not when money moves. The cash flow statement reconciles the two.

Related

The income statement page covers the layout and line names. Gross profit is the first subtotal and the clearest view of pricing. And operating income is the line this page compares net income against, with its own data on how it reacts to revenue changes.

This page is educational, not financial advice. Test every idea on your own charts before risking money.