How to Read Financial Statements: The Three You Need

Open any 10-K and three statements do the work. One covers a period, one covers an instant, and one explains why the other two disagree about how the year went. They are built to tie together, and once you can follow a single dollar from revenue through to the cash line, most accounting stops being mysterious. What follows is one hypothetical company, carried through all three, with every number reconciling.

The income statement, read top to bottom

Revenue at the top, net income at the bottom, and a set of subtractions in between that tell you where the money goes.

All three statements are free. Every US-listed company files them with the SEC, quarterly in the 10-Q and annually in the 10-K, and both are searchable on EDGAR within minutes of release. Go to the filing. Summary pages on financial sites rearrange the lines, drop the notes, and occasionally blend adjusted figures with reported ones in a way that quietly changes what you are looking at.

Income statement (millions)	This year	Last year
Revenue	$1,000	$900
Cost of revenue	$600	$549
Gross profit	$400	$351
Research and development	$120	$105
Selling, general and administrative	$150	$140
Operating income	$130	$106
Interest expense	$20	$18
Pretax income	$110	$88
Income tax	$22	$18
Net income	$88	$70

Revenue grew ($1,000 - $900) / $900 = 11.1%. Gross margin is $400 / $1,000 = 40.0% against $351 / $900 = 39.0% last year, so the company held price while growing. Operating margin went from 11.8 percent to 13.0 percent, which means costs grew more slowly than sales.

Gross margin is the line to watch across several years. It captures pricing power and input costs in one figure, and a gross margin sliding half a point a year for three years is a business losing an argument with either its customers or its suppliers.

Interest expense is small here relative to operating income. Coverage is $130 / $20 = 6.5 times, which is comfortable. Coverage below roughly 2 times starts to look tight, because one bad year of operating income puts the interest payment in question.

The balance sheet, which is a photograph

The income statement covers twelve months. The balance sheet covers one instant, usually the final day of those twelve months, and it must balance: assets equal liabilities plus equity, always, by construction.

Balance sheet (millions)	This year	Last year
Cash and equivalents	$90	$82
Accounts receivable	$210	$150
Inventory	$180	$140
Total current assets	$480	$372
Property, plant and equipment, net	$320	$305
Goodwill and intangibles	$100	$100
Total assets	$900	$777
Accounts payable	$120	$105
Accrued liabilities	$60	$57
Total current liabilities	$180	$162
Long-term debt	$300	$260
Total liabilities	$480	$422
Paid-in capital	$200	$203
Retained earnings	$220	$152
Total equity	$420	$355
Total liabilities and equity	$900	$777

Check the balance first, because it takes four seconds: $480 + $420 = $900, matching total assets.

Then the solvency ratios. Current ratio is $480 / $180 = 2.67, meaning current assets cover near-term obligations comfortably. Debt to equity is $300 / $420 = 0.71. Return on equity is $88 / $420 = 21.0%, which is strong, though return on equity flatters any company that funds itself with debt, since borrowing shrinks the denominator while the earnings from the borrowed money stay in the numerator.

Goodwill deserves a second look. It is what an acquirer paid above the fair value of the assets it bought, it sits on the balance sheet at $100 million here, and it generates nothing by itself. Companies test it for impairment annually, and a large write-down is an admission that an acquisition disappointed, arriving as a non-cash charge that wrecks reported earnings while touching no cash at all. Goodwill at a large share of total assets tells you the company has grown by buying other companies, which is a different risk profile from one that grew by selling more.

Now look again at receivables. They went from $150 million to $210 million, a rise of 40 percent, while revenue rose 11.1 percent. That gap is the single most useful thing on this balance sheet and the next section explains why.

The cash flow statement, which is harder to dress up

Three sections. Operating covers the business itself. Investing covers buying and selling long-lived assets. Financing covers debt, equity and dividends.

Cash flow statement (millions)	This year
Net income	$88
Depreciation and amortization	$70
Increase in accounts receivable	($60)
Increase in inventory	($40)
Increase in accounts payable	$15
Cash from operations	$73
Capital expenditures	($85)
Cash from investing	($85)
Long-term debt issued	$40
Dividends paid	($20)
Cash from financing	$20
Net change in cash	$8

Start at net income, $88 million. Depreciation of $70 million was subtracted on the income statement and no cash left the building, so it is added back. Receivables rose $60 million, which is revenue recognized with the money still owed, so it is subtracted. Inventory rose $40 million, which is cash converted into goods sitting in a warehouse. Payables rose $15 million, which is the company holding onto its own cash a little longer by paying suppliers later. Add it up and the answer is $88 + $70 - $60 - $40 + $15 = $73 million of operating cash flow.

Then capital expenditure, which almost every analyst subtracts immediately, because a company that has to spend $85 million on machinery and buildings to keep producing at this scale cannot treat operating cash flow as money available to shareholders. Free cash flow is $73 - $85 = -$12 million. The company reported $88 million of profit and consumed $12 million of cash.

Whether that is alarming depends entirely on what the capital expenditure bought. Capacity for revenue that has already been contracted is one story, and a maintenance spend that merely keeps existing plant running while cash goes backwards is an entirely different one, so the split between growth and maintenance capital expenditure is worth hunting for in the notes even though few companies disclose it cleanly.

How the three tie together

Two links hold the set together, and checking both of them takes about a minute once you know where to look, which is a minute well spent, since a reconciliation that fails is almost always a sign that you have grabbed a figure from the wrong period or the wrong column.

Net income appears twice. It is the last line of the income statement and the first line of the cash flow statement, and it also moves retained earnings on the balance sheet. Confirm it: opening retained earnings of $152 million, plus net income of $88 million, minus dividends of $20 million, gives $152 + $88 - $20 = $220 million, which is the retained earnings line. It ties.

Cash appears twice as well. Net change in cash on the cash flow statement was $8 million, and the balance sheet shows cash going from $82 million to $90 million. $82 + $8 = $90. It ties.

Depreciation links the income statement to the balance sheet in the other direction. The $70 million charge reduces the carrying value of property and equipment, capital expenditure of $85 million raises it, and the net effect is $305 + $85 - $70 = $320 million, matching the PP&E line. Every statement is a different view of one set of transactions, and if your reconciliation fails, you have misread a line or missed a disclosure in the notes.

Where accrual accounting flatters

Accrual accounting books revenue when it is earned and costs when they are incurred, which gives a truer picture of a period than raw cash movements do. It also creates room.

Days sales outstanding measures how long customers take to pay. This year: $210 / $1,000 x 365 = 77 days. Last year: $150 / $900 x 365 = 61 days. Sixteen extra days of credit extended to customers, in one year, on top of revenue growth of only 11 percent. Three explanations fit. The company loosened credit terms to make the sales number. Customers are struggling. Or revenue was recognized early on contracts where the cash is genuinely still coming.

Inventory days tell a parallel story: $180 / $600 x 365 = 110 days against $140 / $549 x 365 = 93 days last year. Goods are sitting longer. Either demand softened or the company built ahead of orders it expects.

Capitalization is the other lever. Costs that get capitalized move onto the balance sheet as an asset and hit earnings slowly through depreciation, while costs expensed immediately hit this quarter in full. Both treatments are legitimate and the choice changes reported profit substantially. Read the accounting policy notes, where the company says which treatment it uses.

Adjusted earnings deserve the same suspicion. Companies present non-GAAP figures excluding stock-based compensation, restructuring charges and acquisition costs, and stock-based compensation is a real cost that dilutes you every year. How to read an earnings report covers the GAAP against adjusted gap in detail.

What to check, in order

Revenue growth and gross margin over three years. Operating margin trend. Receivables and inventory growth against revenue growth. Operating cash flow against net income. Free cash flow after capital expenditure. Debt maturities and interest coverage. Share count, up or down.

Seven things. Twenty minutes per company once you have done it a few times, and it filters out a surprising amount.

Our company passes most of that and fails one. Margins are improving, coverage is fine, the balance sheet is sound, and the receivables build is the question you would want answered before doing anything else. Read the management discussion section for their explanation, then decide whether it convinces you.

From here, stock valuation basics turns these statements into comparable multiples, the DCF calculator takes free cash flow forward into a present value, and how to analyze a stock puts the whole thing into a repeatable checklist.