The Cash Flow Statement

Imagine you run a small building firm. In December you finish a $500,000 job, sign off the paperwork, and send the invoice. Your accountant records $500,000 of revenue for the year, and on paper you have had a spectacular December. The client pays in April. Meanwhile you still have to pay your crew in January. You are, on paper, highly profitable and, in the bank, nearly broke.

That gap is why the cash flow statement exists. Accrual accounting — the system behind the income statement — records revenue when it is earned and costs when they are incurred, not when money actually moves. That is the right way to measure performance over a period, but it means reported profit and the bank balance can drift a long way apart. Companies do not fail because profit turned negative. They fail because they run out of cash.

Three buckets

Every movement of cash lands in exactly one of three sections, and the split matters more than the totals.

Cash from operations (CFO) is cash generated by the actual business — selling things, collecting from customers, paying staff and suppliers. This is the engine. A healthy company generates cash here, year after year, without help.

Cash from investing (CFI) is money spent on or received from long-lived assets: building factories, buying equipment and software (together, capital expenditure or capex), acquiring companies, selling a division. For a growing firm this is usually a large negative number, and that is normal — it is the cost of tomorrow's operating cash.

Cash from financing (CFF) is dealings with the people who fund the business: borrowing, repaying debt, issuing shares, buying shares back, paying dividends. It tells you whether the company is being fed by outsiders or feeding them.

Add the three and you get the change in the cash line on the balance sheet. Nothing is left over.

Building CFO the way companies actually report it

Almost every filing uses the indirect method: start at net income and undo the accounting until only cash remains. Two kinds of adjustment do all the work.

First, add back non-cash charges. Depreciation and amortisation reduced profit but no money left the building — the money left years ago when the asset was bought. Share-based compensation is the same story: a real cost to shareholders, but paid in shares, not cash.

Second, adjust for working capital. If receivables grew, you booked sales that customers have not paid for, so subtract the increase. If inventory grew, cash is sitting in a warehouse, so subtract that too. If payables grew, you are holding on to suppliers' money, so add it back. The rule is short: cash tied up in working capital is subtracted; cash freed from it is added.

A worked example

Those are the numbers in the diagram, in millions. Net income is 100. Depreciation of 45 is added back, taking the running total to 145. Receivables grew by 40 and payables grew by 15, a net working-capital drag of 25, so CFO = 100 + 45 - 40 + 15 = 120.

Investing: the company spent 60 on new equipment, so CFI = -60. Financing: it drew 20 of new debt and paid 30 in dividends, so CFF = -10. The bank balance therefore moved by $120 - 60 - 10 = 50$.

Notice what the profit figure alone would have told you: 100. The company generated 120 of operating cash but only kept 50 after reinvesting and paying owners. Subtract capex from CFO and you get $120 - 60 = 60$, the rough measure of free cash flow — what is genuinely available once the business has been kept running.

Now change one number. Suppose receivables had grown by 90 instead of 40. CFO drops to 70, CFI and CFF are unchanged, and net cash falls to zero. Reported profit is identical at 100. That single swap is the classic warning sign: earnings holding steady while operating cash quietly collapses, usually because sales are being booked to customers who are slow to pay.

Common pitfalls

• Confusing CFO with profitability. Operating cash can be flattered simply by stretching suppliers, which is borrowing, not earning.
• Ignoring the add-backs. Share-based compensation is added back because no cash moved, but it dilutes shareholders every year. It is a real cost that CFO hides.
• Treating all capex as optional. Some capex merely replaces worn-out kit; cutting it lifts cash today and shrinks the business tomorrow.
• Reading one year. Working capital swings are lumpy. Judge CFO against net income over three to five years, not one quarter.