Most consulting candidates who cross-apply to banking over-prep goodwill impairments and deferred-tax formulas. What both banking screens and case interviewers actually test is narrower: can you separate accrual profit from cash, and can you keep the balance sheet balanced when one line item moves.
That is the whole game. Learn five mechanics cold—three-statement linkage, a $10 depreciation change, working capital, deferred revenue, and EBITDA versus cash—and you cover what IB first rounds grill and what a consulting interviewer will actually probe when a case turns financial. After this piece you should be able to walk any of those five with original numbers, state your tax assumption out loud, and know which topics are folklore for your consulting process.
What the room is listening for
Banking interviews want mechanical fluency. Say the tax rate. Trace income statement → cash flow → balance sheet. End by naming the change in assets and the matching change in equity (or liabilities). Miss that last check and the answer sounds polished but fails.
Consulting cases almost never ask you to invent a deferred tax liability from an asset write-up. They do ask why a retailer with rising EBITDA is still burning cash, or what happens to cash when inventory piles up. The shared skill is the same: accrual earnings are not cash.
CoachNed is not affiliated with any bank or consulting firm named here. What follows is interviewer-side pattern recognition from scoring cases and watching candidates freeze on the same three-statement walkthroughs, not a claim about any firm's confidential question bank.
How the three statements lock together
Start every answer the same way. The income statement closes to net income. Net income starts the cash flow statement (indirect method) and also updates retained earnings on the balance sheet. Ending cash from the cash flow statement must equal cash on the balance sheet. Non-cash expenses that hit earnings—depreciation, amortization, many impairments—get added back in operating cash flow so you do not double-count a cash hit that never happened.
ASC 230 requires a reconciliation of net income to operating cash flow and, at minimum, separate reporting of changes in operating receivables, inventory, and payables. That is why interviewers care about working-capital lines: the standard itself treats them as the bridge between earnings and cash.
A clean interview habit: never invent cash from an accrual. If revenue rises on credit, receivables rise and cash does not move until collection. If you buy inventory on credit, inventory and payables rise together and cash waits for payment.
Worked answer: $10 more depreciation
This is the banking litmus test. Assume a 25% tax rate and that the company can use the tax shield in the same period. Under IAS 16, depreciation is the systematic allocation of an asset's depreciable amount over its useful life—book expense, not a cash outlay.
| Step | Amount at 25% tax |
|---|---|
| Extra depreciation expense | −$10.00 |
| Pre-tax income | −$10.00 |
| Tax expense (shield) | −$2.50 |
| Net income | −$7.50 |
| Add back depreciation in CFO | +$10.00 |
| Net cash from operations | +$2.50 |
| Net PP&E | −$10.00 |
| Cash | +$2.50 |
| Total assets / retained earnings | −$7.50 |
On the income statement, expense up $10, net income down $7.50. On the cash flow statement, start with −$7.50, add back the full $10 non-cash charge, and land on +$2.50 of cash. On the balance sheet, net PP&E falls $10 and cash rises $2.50, so assets fall $7.50; retained earnings falls $7.50. Balanced.
If the tax rate were 40% instead, net income would fall $6 and cash would rise $4. The add-back stays $10. A higher tax rate shrinks the earnings hit and enlarges the cash shield—only if the company actually pays less cash tax this period. If it cannot use the shield now (loss position, valuation allowance), say so: book tax expense and cash taxes can diverge.
Ned's rule. If you cannot finish the depreciation walkthrough by naming both the cash change and the retained-earnings change in one breath, you are not ready for the banking screen—and you will also mishandle any case that asks why EBITDA is not cash.
Working capital: where cases actually bite
Define net working capital for interview purposes as current operating assets excluding cash minus current operating liabilities excluding interest-bearing debt. Rising receivables or inventory use cash. Rising payables or deferred revenue free cash (or delay cash outflows). That is the same reconciliation ASC 230 forces onto the cash flow statement.
Worked example—original figures, not a bank case library. HarborLine Apparel sells $4 million of goods on credit this month (COGS $2.4 million, ignore taxes for a moment). Inventory falls $2.4 million, receivables rise $4 million, and the income statement shows $1.6 million of gross profit. Cash has not moved yet. When customers pay $3 million and HarborLine pays suppliers $1 million of the related payables, cash rises $2 million while receivables fall $3 million and payables fall $1 million. Earnings already happened; cash arrived later. That gap is what a case interviewer is listening for when they say "sales are up but the business feels tight."
Receivables growing faster than revenue usually means longer collection periods, softer credit terms, or aggressive recognition. Days sales outstanding (receivables ÷ revenue × 365) is the metric to name without being prompted.
Deferred revenue: cash now, earnings later
Under ASC 606, when a customer pays before the company transfers the good or service, the company presents a contract liability—commonly labeled deferred revenue. Cash arrives first; revenue waits until performance obligations are satisfied.
Real numbers from Apple's FY2025 Form 10-K: total deferred revenue was $13.7 billion as of September 27, 2025, and $8.229 billion of that year's net sales had been sitting in deferred revenue at the prior year-end. Apple expects 66% of the $13.7 billion to be realized within a year. That is not interview folklore; it is the FY2025 Form 10-K.
Worked walkthrough with original numbers. NorthPeak SaaS collects a $120,000 annual subscription on day one. Cash +$120,000, deferred revenue +$120,000. No income-statement hit yet. Each month it recognizes $10,000 of revenue: deferred revenue falls $10,000, retained earnings rise $10,000 (before tax). Cash does not move again. If a case interviewer asks whether prepaid revenue is "good," the honest answer is: it is great for cash and a liability until you deliver.
EBITDA vs cash: the consulting trap
EBITDA is a non-GAAP measure. The SEC's non-GAAP guidance treats "earnings" as GAAP net income; if you present EBITDA as a performance measure, you reconcile to net income, not to operating income. EBITDA adds back interest, taxes, depreciation, and amortization. It ignores working-capital cash and capital expenditure. A business can post rising EBITDA while cash falls if receivables and inventory absorb the growth, or if CapEx is heavy.
Worked contrast. Meridian Tools reports EBITDA of $50 million. Depreciation is $8 million, interest $3 million, taxes $9 million, so net income is $30 million. Inventory builds $12 million and receivables build $6 million while payables are flat. Operating cash flow on an indirect basis starts at $30 million, adds back $8 million of depreciation, and subtracts $18 million of working-capital investment—cash from operations is about $20 million before CapEx. EBITDA looked like $50 million; cash available after funding growth was far less. In a case, saying "EBITDA means cash" is an instant score leak.
Which of these a case interviewer will actually probe
| Topic | Banking screen | Typical consulting case |
|---|---|---|
| Three-statement linkage | Almost always | Rare as a pure walkthrough; assumed when you touch P&L and cash |
| $10 depreciation change | The classic litmus test | Uncommon as a standalone; useful when you explain D&A in unit economics |
| Working capital / cash vs profit | High | High—growth cases, retail, industrials |
| Deferred revenue | Medium (software / SaaS deals) | Medium when the prompt is subscription or prepaid |
| EBITDA vs cash | Medium (credit / LBO language) | High whenever someone waves EBITDA as "profit" |
| Goodwill impairment / DTL formulas | Common in IB technicals | Rare in cases; do not burn prep hours here for consulting |
If you are only preparing consulting interviews, prioritize working capital and EBITDA-versus-cash, then deferred revenue when the industry is prepaid. Keep the depreciation walkthrough ready anyway: it trains the same muscle, and if you cross-apply to banking it is non-negotiable.
Drill this before your next screen
Write the $10 depreciation walkthrough from a blank page at 25% and again at 40%. Then invent a three-month HarborLine-style sequence: credit sales, inventory build, collection lag. Time yourself to two minutes per walkthrough. When you want a scored case that forces cash judgment rather than memorized definitions, run a live voice case on /interview or start with three typed turns on /start. Everything is open for seven days, no card; then $120 for a recruiting season or $49 a month.
Frequently asked questions
What accounting questions do investment banking interviews ask most?
Expect three-statement linkage, the depreciation tax-shield walkthrough, working-capital cash effects, and often a deferred-revenue or inventory scenario. Goodwill and deferred-tax questions show up often in IB technicals; treat them as second-order unless your target group is M&A-heavy.
Do consulting case interviews test accounting?
They rarely ask pure accounting trivia. They do probe whether you confuse EBITDA with cash, whether you see inventory and receivables as cash uses, and whether prepaid revenue is a liability until delivery. If you can explain those three, you are ahead of most candidates who only memorized frameworks.
Why does $10 of depreciation increase cash at a positive tax rate?
Depreciation reduces taxable income, so cash taxes fall if the shield is usable. You add the full non-cash expense back on the cash flow statement, so the net cash effect equals the tax rate times $10. At 25%, that is +$2.50.
Is deferred revenue a liability or an asset?
It is a contract liability under ASC 606: cash (or an unconditional right to cash) arrived before you transferred the good or service. It becomes revenue as you perform. Apple's FY2025 10-K alone shows billions of dollars sitting in that bucket.
Should I memorize a 25% tax rate for every answer?
No. State the rate you are using, or ask. Twenty-five percent is a common interview convention, not a universal rule. Wrong arithmetic after a clear assumption is better than silent guessing.
Sources
- IAS 16 Property, Plant and Equipment (IFRS) — official definition of depreciation as systematic allocation of depreciable amount. Checked 2026-09-24.
- FASB ASU 2014-09, Revenue from Contracts with Customers (Topic 606) — contract liability / deferred revenue definition. Checked 2026-09-24.
- ASC 230 Statement of Cash Flows overview — net income to operating cash reconciliation and working-capital disclosure. Checked 2026-09-24.
- Apple Inc. Form 10-K (FY2025) — $13.7B deferred revenue and $8.229B of sales pulled from prior deferred balances. Checked 2026-09-24.
- SEC staff guidance on non-GAAP financial measures (EBIT/EBITDA) — EBITDA is non-GAAP; reconcile to net income when used as performance. Checked 2026-09-24.