The most counter-intuitive fact in corporate finance is that growth consumes cash. A business winning more orders, expanding margins and gaining share can run out of money doing it, and the mechanism is working capital.
The sequence
Consider a company that buys materials, manufactures, sells on 60-day terms and pays its own suppliers in 30.
To fulfil an order it must buy materials — cash out. It holds inventory while producing — cash tied up. It ships and invoices, then waits 60 days — cash still out. Meanwhile it pays its suppliers at day 30. The profit on the sale is recognised at shipment. The cash arrives two months later.
Now double the order book. Every one of those outflows doubles immediately. The corresponding inflows double two months later. The faster the growth, the larger the gap, and the gap is funded from somewhere — cash reserves, a credit line, or not at all.
This is why a profitable, growing business can fail. It is not a paradox and it is not rare. It is the single most common way otherwise viable companies run out of money.
The cash conversion cycle
The measurement combines three components, all in days.
- Days inventory outstanding. How long stock sits before it is sold.
- Days sales outstanding. How long customers take to pay after invoicing.
- Days payable outstanding. How long the company takes to pay its own suppliers.
Inventory days plus receivable days minus payable days gives the cash conversion cycle: the number of days between paying for something and being paid for it. That figure multiplied by daily cost of sales is roughly how much cash is permanently locked in the business — capital that is committed, cannot be spent, and grows in direct proportion to revenue.
Some businesses have a negative cycle. Subscription software collects annually in advance and pays costs monthly. Supermarkets sell stock in days and pay suppliers in weeks. These businesses generate cash from growth rather than consuming it, which is a structural advantage worth more than several points of margin.
Where it hides in the accounts
The income statement will not show this. Profit is recognised when a sale is made, not when it is collected, so a company with deteriorating working capital can report record profits in the period its cash position collapses.
The cash flow statement shows it directly. Changes in working capital appear as adjustments in the operating section, and a business consuming cash through growth shows large negative entries for increases in receivables and inventory.
The diagnostic that matters is a comparison of growth rates. If receivables are growing faster than revenue, customers are taking longer to pay, or revenue is being recognised on sales that will not be collected. If inventory is growing faster than cost of sales, stock is accumulating — either deliberately or because it is not selling. Both are visible from two consecutive balance sheets and neither requires any special access.
The ways it goes wrong
Growth financed by supplier credit. Stretching payables is the fastest source of working capital and the most fragile. Suppliers notice, and the response is tighter terms, prepayment demands, or withdrawal — usually at the moment the business is least able to absorb it.
Large customers. Winning a major account is celebrated. Large customers also dictate payment terms, and 90 or 120 days is common. The business must fund three or four months of that customer’s cost of sales, and concentration means it cannot afford to push back.
Inventory as a hedge. After a supply disruption, businesses build buffer stock. This is defensible risk management and it permanently converts cash into inventory. The decision is often taken operationally without anyone costing the capital.
Seasonal build. A business with concentrated seasonal sales must fund inventory and staffing months ahead of revenue. The peak cash requirement typically falls at the point of maximum operational stress.
What actually helps
- Invoice on the day of delivery. The most under-used lever available. Payment terms start from the invoice date, so a week’s delay in invoicing is a week of financing given away. Businesses that invoice in a monthly batch are routinely adding two weeks to their average collection period for no reason.
- Take deposits. A deposit on order converts a cash outflow into a partial inflow at the start of the cycle. It is normal in many industries and rarely asked for in others simply because nobody has tried.
- Segment the receivables. Collection effort concentrated on the largest overdue balances returns far more than chasing everything evenly.
- Model the cash requirement before accepting the order. A large contract at good margin can still be unaffordable. The question is not whether it is profitable but whether the business can fund the gap between paying for it and being paid.
- Arrange facilities against the forecast peak, not the average. A credit line sized to typical requirements is insufficient in exactly the month it is needed.
For smaller firms without a treasury function, the practical version of this is a rolling thirteen-week cash forecast — long enough to see the seasonal peak coming, short enough to be built from real invoices rather than assumptions. We set out how to construct one in cash flow management fundamentals for small businesses.
