Introduction
"If you could have only one financial statement, which would you choose?" The question is old enough to be a cliché, and it survives because there is no single right answer, only well-reasoned and poorly reasoned ones. Each of the three financial statements answers a different question about a business. Choosing among them forces a clear view of what each can show on its own and, more usefully, what each one hides.
The exercise is also practical. Bankers regularly work with incomplete information: a teaser with only an income statement summary, a private company with management accounts but no cash flow statement, a distressed borrower whose balance sheet matters more than its earnings. Knowing which statement answers which question tells you what is missing and what it might be concealing.
What Each Statement Answers on Its Own
Each statement is built for one purpose, and each has a characteristic blind spot:
| Statement | Answers | Cannot show on its own |
|---|---|---|
| Income statement | Is the business profitable, and how are its margins changing? | Whether profit has turned into cash, and what the company owns or owes |
| Balance sheet | What does the company own and owe at one date, and how is it financed? | How the company performed over the period, or why balances changed |
| Cash flow statement | Where did cash come from and go, and can the business fund itself? | Whether the business is profitable on an accrual basis, or its full obligations |
The income statement measures performance over a period, matching revenue with the costs of earning it, as described in how the income statement works. It is the basis for most valuation multiples and for the earnings that investors follow quarter by quarter. Its weakness is that accrual accounting relies on estimates (of useful lives, credit losses and revenue timing, among others) that give management room to shape the result.
- Accruals
Revenue and expenses recognized when they are earned or incurred rather than when cash changes hands, such as sales on credit, wages owed but unpaid, or depreciation. Accruals are the difference between net income and operating cash flow, and they rely on management's estimates.
The balance sheet measures position at a moment: assets, liabilities and the equity that is left over. It shows leverage, liquidity and the capital tied up in the business, which lenders and restructuring advisers care about most. On its own, though, it is a snapshot with no story; two balance sheets a year apart show that something changed, not why.
The cash flow statement shows actual cash movements, sorted into operations, investment and financing. It is the hardest statement to manipulate with estimates and the most direct test of whether a business can pay its bills, as explained in how the cash flow statement works. But cash can be lumpy and misleading over short periods: a company can delay payments to suppliers or cut investment to flatter one year's cash flow.
If You Could Keep Only One
Most bankers choose the cash flow statement, for three reasons:
- It is closest to reality: cash received and paid depends on fewer estimates than revenue and expenses, so it is harder to shape.
- It contains the income statement in summary: the indirect method starts from net income, so the bottom line of the income statement is on the first row.
- It measures survival: a company fails when it runs out of cash, not when it reports a loss, and only the cash flow statement shows whether operations are funding the business.
The reasoning is strongest for lenders, for distressed companies and for businesses whose earnings are known to diverge from cash, such as fast growers absorbing working capital, the pattern described in why profitable companies run out of cash.
The case for the alternatives is real. A bank or insurer is understood mainly through its balance sheet, because its assets and liabilities are its business. A mature, steady company with predictable working capital and capital expenditures (capex) may be understood almost entirely through its income statement, because its earnings and cash flow move together over time.
Why Earnings Still Matter
Choosing cash flow is not a claim that accruals are useless. Academic research has long found the opposite over short periods. Work by Patricia Dechow in 1994 found that accrual accounting makes earnings a better measure of a company's performance than cash flows over short intervals, because accruals smooth out the timing of receipts and payments. The same research found the advantage shrinking over longer horizons, as timing differences wash out.
What makes the cash flow statement valuable is the comparison with earnings. In a 1996 paper in The Accounting Review, Richard Sloan showed that the part of earnings made up of accruals is less persistent than the part backed by cash, and that stock prices behave as if investors fail to tell them apart; the finding, known as the accrual anomaly, is described in Berkeley Haas's account of the award for Sloan's paper. Companies with high accruals, profits well ahead of cash, tended to see weaker subsequent returns. That gap between earnings and cash is exactly what quality of earnings analysis is designed to examine.
If You Could Keep Two
With two statements, the usual answer changes: the balance sheet and the income statement. The reason is that together they contain everything needed to rebuild the cash flow statement. Net income comes from the income statement. Depreciation and other non-cash items appear on the income statement or can be inferred from changes in balance sheet accounts. Working capital movements, capex, borrowing, repayments and dividends all show up as changes between the opening and closing balance sheets. Cash flow is, in this sense, derived from the other two, a relationship traced in detail in how the three statements link.
The rebuilt statement will not be perfect. Non-cash transactions, acquisitions, currency effects and disposals blur the changes in balance sheet accounts, so an indirect cash flow statement reconstructed from two balance sheets is an approximation. But it is a good one, and the reverse is not possible: the cash flow statement and the income statement together cannot reproduce a balance sheet, because neither records the opening levels of assets and liabilities.
In practice, of course, a banker never chooses. The three statements are read together, each one checking the others. The question of which matters most is valuable for what it reveals about each statement's purpose and its limits, and for the habit it builds: whenever one statement tells a story, look at the other two to see whether they agree.
