Here's a scenario that trips up a lot of interview candidates: a company's Revenue grows by $100, Net Income goes up right along with it — and yet Cash Flow from Operations (CFO) actually falls. How is that possible? Isn't more profit supposed to mean more cash?
The short answer is Accounts Receivable. The longer answer is worth understanding properly, because this exact mechanism shows up constantly in real financial statements and in finance interviews at every level, from a first-round accounting screen to a senior associate case study.
Revenue Recognition vs. Cash Collection
Under accrual accounting, Revenue is recognized when it is earned — not necessarily when the cash lands in the bank. If a company sells $100 of additional goods or services on credit, that $100 shows up on the income statement immediately. But if the customer takes 60, 90, or 120 days to pay, the cash doesn't arrive until later. In the meantime, that unpaid balance sits on the balance sheet as Accounts Receivable (AR).
This timing gap between "earned" and "collected" is exactly what the Cash Flow Statement is designed to correct for. Starting from Net Income, the indirect-method Cash Flow Statement adds back non-cash expenses and then adjusts for changes in working capital — including the change in Accounts Receivable. An increase in Accounts Receivable is a use of cash: it means the company recognized more revenue than it actually collected, so that gap gets subtracted from Net Income when computing Cash Flow from Operations.
Working Through the Numbers
Take a company with a baseline EBIT of $500, Interest Expense of $50, and a 25% (0.25) tax rate, giving a baseline Net Income of $337.5. Now Revenue increases by $100, and that extra revenue flows through at a 40% (0.40) incremental margin — meaning $40 of it becomes additional EBIT, with the rest absorbed by higher COGS and variable costs.
After tax, that $40 of extra EBIT becomes $30 of extra Net Income ($40 × 0.75). If the company collected every dollar of that new revenue in cash immediately, Cash Flow from Operations would rise by the same $30. But suppose only 60% (0.60) of the new revenue is actually collected this year, with the remaining 40% (0.40) — or $40 — sitting in Accounts Receivable at year end. Now Cash Flow from Operations only rises by $30 (the higher Net Income) minus $40 (the AR build) — a net decrease of $10, even though the company is more profitable than before.
This is worked through in full, step by step, in 3-Statement Change: Revenue Increases by $100, including the balance sheet check that confirms everything still ties out.
Why This Matters Beyond the Interview Room
This isn't just a textbook exercise. Fast-growing companies routinely show strong Net Income while burning cash, precisely because Accounts Receivable, Inventory, and other working capital accounts grow along with the top line. Analysts and PE investors watch the gap between Net Income and Free Cash Flow closely for exactly this reason — a widening gap can be a sign of aggressive revenue recognition, deteriorating collections, or simply a business that needs more working capital financing to keep growing.
It's worth contrasting this with the opposite case: when Depreciation & Amortization increases, Net Income actually falls while Cash Flow from Operations rises, because D&A is a non-cash expense added back on the cash flow statement. That mechanism — and why the direction flips depending on which line item is moving — is explained in Why Does Depreciation Increase Cash Flow Even Though It Lowers Net Income? Understanding both directions side by side is what separates a candidate who has memorized a formula from one who actually understands how the three statements connect — a link explored directly in Connect the Three Statements.
The Takeaway
Net Income and Cash Flow from Operations are not the same thing, and they don't have to move in the same direction. Whenever you see Revenue and Net Income rise, always ask the follow-up question: was that revenue actually collected in cash? If not, check what happened to Accounts Receivable — that's where the answer to the cash flow puzzle is hiding.