Definition
Working capital is the difference between current assets (cash, accounts receivable, inventory) and current liabilities (accounts payable, short-term debt, accrued expenses).
Formula: Working Capital = Current Assets − Current Liabilities
Why It Matters
Working capital is the operational lifeline of your business. Positive working capital means you can cover short-term obligations. Negative working capital means you might struggle to pay bills, even if you're profitable on paper.
Growth often reduces working capital — which is counterintuitive. As you grow, you need more inventory, you extend more credit to customers, and you take on more obligations. Without careful management, fast growth can drain working capital faster than revenue replaces it.
Example
An e-commerce business has $120K in cash, $80K in accounts receivable, and $50K in inventory — totaling $250K in current assets. Current liabilities are $150K (accounts payable, credit card balances, and a short-term loan payment). Working capital = $250K − $150K = $100K. That $100K is the buffer available to cover day-to-day operations, restock inventory, and absorb timing gaps between paying suppliers and collecting from customers.
What Good Looks Like
Positive working capital is the baseline — it means you can cover your near-term obligations. But the right amount depends on your business model. A SaaS company that collects annual prepayments and has minimal inventory might operate comfortably with modest working capital. A product business with 60-day supplier terms and 90-day customer payment cycles needs a much larger cushion.
The current ratio (current assets / current liabilities) expresses working capital as a ratio. A current ratio of 1.5 to 2.0 is generally considered healthy. Below 1.0 means negative working capital — you owe more short-term than you own, which is sustainable only if you collect cash faster than you pay it out (the Amazon model).
What to Watch For
- Working capital declining while revenue grows: This is the classic growth trap. You're investing in inventory and extending credit faster than cash comes in. Many profitable businesses fail this way.
- Seasonal swings: Retail and construction businesses often see working capital compress during peak seasons when inventory and payroll spike before revenue catches up. Plan for it.
- AR aging: Working capital looks healthy on paper if receivables are large — but only if those receivables actually get collected. Aging receivables are a hidden working capital risk.
How CentSight Helps
CentSight tracks your working capital position in real time and alerts you when it's trending below safe levels. It connects AR, AP, and cash data to give you a complete picture of operational liquidity.