The Short Answer
Working capital is the difference between a business’s current assets — cash and anything convertible to cash within a year, like inventory or unpaid customer invoices — and its current liabilities, the bills and debts due within that same year. It measures whether a business has enough short-term resources on hand to cover its short-term obligations, separate from its longer-term assets and debts.
In short, working capital shows whether a business can pay its near-term bills without scrambling.
How Working Capital Is Calculated
- Current assets — cash, accounts receivable, and inventory: resources expected to convert to cash within about 12 months.
- Current liabilities — accounts payable, short-term loans, and upcoming bills due within about 12 months.
- Working Capital = Current Assets − Current Liabilities. A positive number is a cushion; a negative number is a warning sign.
Positive vs. Negative Working Capital
- Positive working capital — short-term assets exceed short-term bills, giving the business a cushion for slow periods or unexpected costs.
- Negative working capital — short-term bills exceed short-term assets, which can create cash flow trouble even in a business that’s profitable on paper.
A Simple Example
Example: A business has $30,000 in cash, $10,000 in unpaid customer invoices, and $15,000 in inventory, for $55,000 in current assets. It owes $25,000 in bills due within the year, so its working capital is $55,000 − $25,000 = $30,000 — a solid cushion. If a slow month suddenly wiped out $35,000 of that cash, though, the business would need to lean on that remaining cushion, or the receivables and inventory it can convert to cash, to stay current on its bills.
Why Working Capital Matters
- A profitable business can still run into trouble if too much cash is tied up in slow-paying invoices or excess inventory that isn’t converting to cash fast enough.
- The current ratio — current assets divided by current liabilities — is a related quick check; a ratio comfortably above 1 generally signals a healthy short-term cushion.
- Collecting payment faster from customers and keeping inventory at reasonable levels both directly improve working capital.
- A business line of credit can bridge a temporary working capital gap without disrupting day-to-day operations.
The Bottom Line
Working capital measures whether a business has enough short-term resources to cover its short-term bills, separate from its overall profitability or long-term assets. Even a growing, profitable business can face real trouble if working capital turns negative, which is why many owners watch it as closely as revenue and profit.
Frequently Asked Questions
What is working capital in simple terms?
It’s the cash and near-cash resources a business has on hand, minus the bills it owes in the near term. It shows whether a business can cover its short-term obligations.
Can a profitable business have negative working capital?
Yes. Profit is measured over a period of time, while working capital is a snapshot of short-term assets versus short-term bills — a business can be profitable overall while still facing a near-term cash crunch.
How can a business improve its working capital?
Common approaches include collecting customer payments faster, negotiating longer payment terms with suppliers, reducing excess inventory, and using short-term financing to smooth out gaps.
What is a good current ratio?
A current ratio (current assets divided by current liabilities) between about 1.2 and 2 is often considered healthy, though it varies by industry — much lower can signal risk, and much higher can mean cash is sitting idle.
Is inventory really a “current” asset?
Usually, yes, as long as it’s expected to sell within about a year. Slow-moving inventory that sits for much longer is less reliable as a source of near-term cash, even though it’s technically counted as current.
Does working capital include long-term loans?
No. Working capital only looks at current (short-term) assets and liabilities. Long-term debts and long-term assets like buildings or equipment sit outside the calculation.
This article is for educational purposes only and is not financial, accounting, tax, or legal advice for your business. Rules, methods, and best practices vary by industry, business size, and location. Consult a qualified accountant or financial professional for guidance specific to your business.