Every finance interview track — IB, PE, ER — tests whether you understand how the three financial statements connect. The base question is a recital; the follow-ups ("walk me through $10 of depreciation") test whether you can trace a single change through all three statements without losing a thread. Here is the full answer pattern.
The base answer
The income statement shows profitability over a period: revenue down to net income. The cash flow statement starts from net income, adjusts for non-cash items and working capital changes, then shows investing and financing flows to arrive at the change in cash. The balance sheet is the position at a point in time — assets equal liabilities plus equity.
The links: net income feeds both retained earnings (balance sheet, equity) and the top of the cash flow statement; the closing cash from the cash flow statement is the cash on the balance sheet; and non-cash charges like depreciation reduce net income while the related asset falls on the balance sheet.
The classic follow-up: $10 of depreciation
Assume a 25% tax rate (state your assumption — some interviewers use 40% from older prep materials; the logic is identical).
- Income statement: depreciation +$10 → pre-tax income −$10 → tax −$2.50 → net income −$7.50.
- Cash flow statement: start at net income −$7.50; add back the $10 non-cash depreciation → cash up $2.50. (The cash benefit is the tax shield.)
- Balance sheet: cash +$2.50, PP&E −$10 → assets −$7.50; retained earnings −$7.50 on the other side. It balances.
The variants they rotate through
- "Inventory rises $10, paid in cash" — no income statement impact until sold; cash flow: working capital use of $10, cash down $10; balance sheet: inventory +$10, cash −$10, assets net unchanged.
- "You buy $100 of equipment with debt" — no income statement impact at purchase; investing outflow $100, financing inflow $100, cash flat; balance sheet: PP&E +$100, debt +$100. Then depreciation and interest flow in future periods — say so unprompted.
- "A customer prepays $50" — cash +$50, deferred revenue +$50 (liability); no revenue yet. Revenue is recognised as delivered, converting the liability to retained earnings over time.
- "Write off $20 of goodwill" — non-cash charge: net income falls by 20 × (1 − t) if deductible, but goodwill impairments are often non-deductible — flag the tax nuance, then trace it through.
Why interviewers care so much
The question is a proxy for whether you can keep a system consistent in your head — the same discipline that keeps a model from breaking. The failure mode is not ignorance, it is losing a thread mid-answer: candidates who narrate slowly and check the balance at the end ("assets down 7.50, equity down 7.50 — balances") consistently outperform faster candidates who skip the reconciliation.
Frequently asked questions
In what order should I walk through the statements for a change like depreciation?
Income statement first (find the net income impact), cash flow statement second (adjust for non-cash items, get the cash change), balance sheet last (place the cash, adjust the asset, and check it balances against retained earnings).
What tax rate should I assume in statement-linkage questions?
State one explicitly — 25% is a sensible modern default; some interviewers still use 40% from older materials. The logic is what is being tested, not the rate.
What is the most common mistake in the $10 depreciation question?
Forgetting the tax shield — treating cash as unchanged rather than up by depreciation × tax rate — and skipping the final balance check that proves the balance sheet ties.
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