Working capital

A profitable firm can still run out of cash if its money is trapped in unpaid invoices and unsold stock. Managing that trap is the job of working capital.

Working capital is the difference between a firm's current assets and its current liabilities, the funds tied up in running the business day to day. It measures the short-term financial resources available to meet near-term obligations, and managing it well is essential to keeping a firm solvent and efficient, regardless of its profitability.

The money that runs the business

Working capital is the lifeblood of daily operations. Current assets include cash, money owed by customers, and inventory; current liabilities include money owed to suppliers and other short-term debts. The gap between them is the capital tied up in the operating cycle, funding the period between paying for inputs and collecting from customers. A firm needs enough working capital to pay its bills and keep operating, but capital locked in stock and receivables is capital not earning a return elsewhere, so there is a cost to holding too much as well as a danger in holding too little.

Profit is not cash

The crucial lesson of working capital is that profit and cash are not the same. A firm can be profitable on paper yet unable to pay its bills, because its cash is trapped in unsold inventory and unpaid invoices while suppliers and wages demand payment now. Many businesses, especially fast-growing ones, fail not from lack of profit but from running out of cash as growth swallows ever more working capital. This is why managing the cash tied up in operations is as vital as earning a profit.

The balancing act

Working capital management is a balancing act. Too little, and the firm risks being unable to meet its obligations, courting insolvency. Too much, and the firm ties up cash inefficiently in idle stock and slow receivables, money that could be deployed more productively. The art lies in collecting from customers promptly, managing inventory tightly, and using supplier credit sensibly, keeping enough liquidity to operate safely without leaving cash needlessly trapped. Squeezing the operating cycle frees cash; letting it bloat consumes it.

Working capital is the often-overlooked discipline of keeping a business liquid, the management of the cash tied up in its everyday operations. Its central truth, that a profitable firm can still fail for want of cash, makes it as important as profitability itself, and its management, balancing the need for liquidity against the cost of idle capital, is one of the unglamorous but decisive skills of running a financially healthy business.