Working capital represents the difference between a company's current assets (cash, accounts receivable, inventory) and current liabilities (accounts payable, short-term debt, accrued expenses). This metric reveals whether a business has sufficient liquid resources to cover its immediate financial obligations and fund day-to-day operations.
The formula is straightforward: Working Capital = Current Assets - Current Liabilities. A positive working capital indicates a company can pay its bills and invest in growth, while negative working capital signals potential liquidity problems. However, context matters. Some businesses, particularly retailers with high inventory turnover, can operate successfully with negative working capital by collecting customer payments before paying suppliers.
Why It Matters
For angel investors, working capital analysis reveals operational efficiency and financial health that balance sheets alone might obscure. A startup burning through working capital faster than it generates revenue will need additional funding sooner than projected, diluting your ownership stake. Strong working capital management often indicates experienced leadership that understands cash flow dynamics. Companies with consistently positive and growing working capital typically have more negotiating power with suppliers, can weather unexpected market downturns, and require less frequent capital injections.
Example
Consider a SaaS startup with $800,000 in current assets (including $500,000 cash, $200,000 in accounts receivable, and $100,000 in prepaid expenses) and $300,000 in current liabilities (mostly accounts payable and accrued salaries). The working capital is $500,000, suggesting healthy liquidity. Now imagine a hardware manufacturer with $2 million in current assets but $1.9 million in current liabilities, leaving only $100,000 in working capital. Despite having larger absolute numbers, this company operates on thin margins and faces higher financial risk. If a major customer delays payment by 60 days, the manufacturer might struggle to pay suppliers or employees, potentially forcing them to seek emergency bridge financing at unfavorable terms.