Working capital is the difference between your current assets (cash, receivables, inventory) and your current liabilities (payables, short-term debt). It's a simple formula, but it explains one of the most confusing situations a growing business runs into: strong profit, weak cash.
Picture a business that sells on 60-day payment terms, holds three months of inventory, and pays its own suppliers in 30 days. Every dollar of revenue takes 60 days to actually arrive as cash, while inventory ties up cash for months before it's even sold — and suppliers still need to be paid in 30. That gap has to be funded from somewhere, usually the business's own cash reserves or a credit line.
This is why growth can feel like it's starving a business of cash rather than fueling it. The faster you grow, the more inventory and receivables you're carrying at any given moment — and the more cash gets trapped in the gap between paying for goods and collecting from customers.
The practical fix is rarely 'sell more.' It's usually some combination of: collecting receivables faster (shorter terms, better follow-up), holding less inventory (tighter forecasting, faster turnover), or negotiating longer payment terms with your own suppliers. Each of these shortens what's called the cash conversion cycle — the time between paying cash out and collecting cash back in.
Working capital isn't just an accounting concept — it's often the real constraint on how fast a business can safely grow.
Key takeaway
Working capital gets trapped in receivables and inventory. Managing it well — not just growing revenue — is often what determines how fast a business can actually scale.