The Three Financial Statements
What each statement tells you, and why interviewers start here.
Every investment banking interview starts with accounting. If you can't confidently walk through the three financial statements and how they connect, nothing else matters. This lesson gives you the canonical answer to "walk me through the three financial statements" — the single most common question in IB recruiting.
Why this is the first question
The three statements are the language of corporate finance. Every valuation technique you will learn — DCF, comps, LBO, accretion/dilution — is built on top of them. Interviewers ask this question because:
- It is a fast litmus test for whether you have done any preparation at all.
- Strong candidates answer it in ~45 seconds with no filler.
- Weak candidates hedge, stumble, or give textbook definitions without context.
Your job is to sound like you have said this answer out loud a hundred times, because you have.
The canonical answer
The three financial statements are the income statement, the balance sheet, and the cash flow statement.
The income statement shows a company's revenues and expenses over a period of time and arrives at net income at the bottom.
The balance sheet shows a company's assets, liabilities, and shareholders' equity at a single point in time, and must balance: Assets = Liabilities + Shareholders' Equity.
The cash flow statement starts with net income, adjusts for non-cash items and changes in working capital, and shows the actual movement of cash across three activities — operating, investing, and financing — to arrive at the change in cash for the period.
Deliver that verbatim and move on. Don't over-explain.
What each statement actually shows
Income statement
A flow statement. It covers a period (quarter, year) and tells you whether the company made money operationally.
Key structure, top to bottom:
- Revenue — what you sold
- Cost of goods sold (COGS) — the direct cost to produce it
- Gross profit — Revenue − COGS
- Operating expenses (SG&A, R&D) — the cost to run the business
- Operating income (EBIT) — profit from core operations
- Interest expense / income — cost of debt
- Pre-tax income
- Taxes
- Net income — the bottom line
Balance sheet
A stock statement. It is a snapshot on a specific date. It answers: what does the company own, what does it owe, and what's left over for shareholders?
- Assets: cash, A/R, inventory, PP&E, goodwill, intangibles
- Liabilities: A/P, accrued expenses, debt, deferred taxes
- Shareholders' equity: common stock, additional paid-in capital, retained earnings
The balance sheet must balance. If it doesn't, you have made an error.
Cash flow statement
A reconciliation. It bridges net income to actual cash because net income includes non-cash items (depreciation, amortisation, stock-based comp) and excludes real cash movements (capex, debt raises, working capital swings).
Three sections:
- Cash from operations (CFO): net income + non-cash items ± changes in working capital
- Cash from investing (CFI): capex, acquisitions, asset sales
- Cash from financing (CFF): debt issued / repaid, dividends, buybacks, equity issued
Sum the three = change in cash. Add opening cash = closing cash, which ties directly back to the balance sheet.
Which statement is the most important?
A favourite follow-up. The answer: it depends on what you're trying to do.
- For valuation, the cash flow statement matters most — you discount cash flows, not earnings.
- For credit analysis, the balance sheet comes first — you want to see leverage and liquidity.
- For operating performance, the income statement tells the story of margins and growth.
If forced to pick one: the cash flow statement, because it ties the other two together and shows real cash generation, which is ultimately what a business is worth.
Worked example — one transaction, three statements
Definitions click once you see them in action. Let's walk a single transaction: a lemonade stand sells £100 of lemonade for cash. The ingredients (sitting in inventory) cost the stand £60. Tax rate is 25%.
Income Statement (this period's profit):
| Line | £ |
|---|---|
| Revenue | +100 |
| COGS | −60 |
| Pre-tax income | +40 |
| Tax (25%) | −10 |
| Net Income | +30 |
Cash Flow Statement (reconcile Net Income to cash):
- Net Income: +30
- Inventory decreased by £60 (a source of cash — you got rid of inventory without spending anything new this period)
- Net change in cash: +30 + 60 = +90
(Check that against common sense: customer handed over £100, you handed HMRC £10 in tax, no other cash moved. +90. ✓)
Balance Sheet (snapshot after the transaction):
| Account | £ |
|---|---|
| Cash | +90 |
| Inventory | −60 |
| Total Assets | +30 |
| Retained Earnings | +30 |
| Total L + E | +30 |
Assets (+30) = L + E (+30). ✓
Three statements, three different views of the same event:
- IS says: you made £30 of profit.
- CFS says: you took in £90 of cash.
- BS says: £90 more cash, £60 less inventory, £30 more equity.
They don't contradict — they complete each other. Profit is not cash. Cash is not profit. The balance sheet is the bookkeeping that makes them tie.
Every "walk me through what happens if…" interview question is this exercise in a different costume. If you can run the three statements for a single lemonade sale, you can handle depreciation increases, debt issuances, acquisitions — anything. They're all the same mechanic applied to a different transaction.
Common traps
- Saying "the income statement shows profit" without distinguishing between GAAP net income and cash generation.
- Forgetting that the balance sheet is a snapshot and the other two are periods.
- Not mentioning that the cash flow statement links the other two (see the next lesson).
What you should be able to do after this lesson
- Deliver the canonical walk-through in 45 seconds, unprompted.
- Explain the difference between a flow statement and a stock statement.
- Answer "which is most important?" with a reasoned response, not a one-word guess.