What is net working capital?

Net working capital is the difference between current assets and current liabilities, and it measures a firm's short-term liquidity and operational efficiency. For professional service firms, net working capital primarily comprises accounts receivable and cash (assets) versus accounts payable and accrued expenses (liabilities). Positive net working capital indicates the ability to meet short-term obligations; trends reveal whether operational efficiency is improving or declining.

Key characteristics

• Calculated as current assets minus current liabilities

• Measures short-term liquidity position

• Positive indicates the ability to meet short-term obligations

• Should be tracked monthly and trended over time

• Key components: AR, cash, AP, accrued expenses

• Changes indicate operational efficiency shifts

Why it matters for professional service firms

Net working capital indicates operational health and liquidity. A firm with $400K in current assets and $350K in current liabilities has $50K in net working capital, a thin cushion for a larger business. Trends matter more than absolute numbers: declining net working capital suggests AR is growing faster than collections, or expenses are being paid faster than revenue arrives. Professional service firms should monitor net working capital monthly and investigate significant changes that may indicate emerging cash flow problems.

Real-world example

Rachel's consulting firm tracked cash closely, but not net working capital. Monthly working capital analysis revealed: January $85K, February $72K, March $58K, and April $41K, with a declining trend. Investigation: AR was growing (good, reflecting revenue growth), but collection was slowing (bad, DSO increasing from 38 to 52 days). Meanwhile, vendor payment timing was unchanged. The net working capital decline signaled an emerging collection problem before cash became critically tight. Action: collection focus recovered $45K in aged receivables, and net working capital stabilized at $60K. Without working capital monitoring, the problem might not have been caught until a cash crisis emerged.