Working capital and the growth trap: why fast growth can quietly break a business.

There's a version of business success that looks healthy on the outside and isn't. Revenue is growing. The order book is full. New clients are signing. And yet something feels tight — suppliers are being stretched, hiring feels harder than it should, the team senses pressure that the top line doesn't explain.

This is the growth trap. It happens when working capital doesn't keep pace with growth, and it catches business owners by surprise because it looks nothing like failure.

What working capital actually measures

Working capital is the difference between your current assets (cash, debtors, stock) and your current liabilities (creditors, short-term debt, VAT owed). It represents the liquidity available to fund your day-to-day operations.

A positive working capital position means you have more short-term assets than short-term obligations. A negative one means you're relying on future receipts or credit to meet current commitments.

The number itself matters less than the trend and what's driving it.

Why growth consumes working capital

Consider what happens when a business wins a significant new contract. Before a cent of revenue is collected, the business incurs costs: staff time, materials, outsourced services, software. Those costs sit on the balance sheet as assets (work in progress, receivables) until the client pays.

If the client pays in 60 days, the business has funded two months of costs out of its own pocket. Multiply this across several new clients, a growing team, and an expanding operation, and the funding requirement compounds rapidly. Revenue doubles; cash available stays flat or shrinks.

The more a business grows, the more working capital it typically needs — unless it actively manages the drivers of that requirement.

The three levers

Working capital is the product of three things: how fast you collect from customers, how much stock or work-in-progress you hold, and how long you take to pay suppliers. These aren't accounting abstractions — they're operational decisions.

Receivables. How long your clients take to pay you. This is partly a credit policy decision, partly a collections discipline, and partly a function of how quickly and accurately you invoice. Every day you shorten your average collection period frees working capital without requiring a single rand of additional funding.

Inventory. How much capital is tied up in stock sitting on shelves or materials waiting to be used. High inventory is common in businesses that over-order as a precaution. It's one of the most direct working capital drains, and one of the most controllable.

Payables. How long you take to pay your suppliers. Using the full terms available to you is a legitimate working capital tool. Stretching beyond agreed terms damages supplier relationships and eventually your credit standing.

Most working capital improvement comes from the first two, not the third.

The signal that growth is creating value vs consuming it

There's a simple diagnostic question: as your revenue grows, is your cash position improving or deteriorating?

If revenue is growing and cash is building, working capital is being managed well. Growth is creating value.

If revenue is growing and cash is tightening, something in the three levers is out of alignment. Growth is consuming more than it's generating. This isn't sustainable.

The problem is that profit and loss statements don't tell you this. A P&L shows revenue and margin. Working capital dynamics show up in the balance sheet and cash flow statement — which many business owners never review.

What this means for growing businesses

A business that is growing quickly should be asking, at every growth stage:

• What is our current average collection period, and is it getting longer or shorter?
• How much working capital is tied up in stock or WIP, and is that proportion growing?
• Do we have a 90-day cash flow forecast that reflects our growth pipeline?
• At what revenue level will our current working capital become insufficient?

These aren't complex questions. They're the kind that a functioning financial management practice should be answering routinely — not when the pressure is already visible.

If you're growing and the financial side is starting to feel harder than the commercial side, that tension is usually a working capital signal. It's worth investigating before it becomes a constraint. Our In Control service includes cash flow forecasting and working capital monitoring as standard — so you always know where the pressure is coming from before it becomes urgent. Related reading: cash flow vs profit and the 13-week cash flow forecast.