Working capital is one of those financial terms that sounds more complex than it is. At its core, it's a measure of a business's short-term financial health: does the business have enough liquid resources to meet its near-term obligations?
The Working Capital Formula
Working Capital = Current Assets − Current Liabilities
Current assets are things the business owns that can be converted to cash within a year: cash in the bank, accounts receivable (money clients owe you), inventory, and prepaid expenses. Current liabilities are things the business owes within a year: accounts payable (bills you owe suppliers), short-term loans, accrued expenses, and taxes due.
Example: Your business has $25,000 in the bank, $12,000 in outstanding invoices, and $3,000 in inventory. Current assets = $40,000. Current liabilities: $8,000 owed to suppliers, $4,000 in taxes due, $2,000 in other near-term bills. Total current liabilities = $14,000. Working capital = $40,000 − $14,000 = $26,000.
What Working Capital Tells You
Positive working capital means your current assets exceed your current liabilities. You have a buffer — the ability to meet short-term obligations and still have resources left over. The larger the buffer relative to your monthly operating costs, the more financial resilience you have.
Negative working capital means your current liabilities exceed your current assets. You owe more than you currently have available to pay it. This is a financial stress signal — even if the business is profitable, it may struggle to meet near-term obligations. This situation often shows up in businesses with rapid growth, slow-paying customers, or poor cash flow management.
Zero or near-zero working capital leaves no margin for unexpected expenses, late-paying clients, or business disruptions. One delayed payment from a major client could create a crisis.
The Working Capital Ratio (Current Ratio)
Dividing current assets by current liabilities (rather than subtracting) gives you the current ratio. A ratio above 1.0 means positive working capital; below 1.0 means negative. A ratio of 1.5 to 2.0 is often cited as comfortable for small businesses — but what's "right" varies by industry and business model.
Why Working Capital Gets Squeezed
Rapid growth: Growing businesses often spend ahead of revenue — hiring, buying inventory, investing in capacity. This burns working capital even when the underlying business is profitable.
Slow-paying clients: If your accounts receivable are growing — more money owed to you, taking longer to arrive — your working capital position worsens even as your revenue grows.
Seasonal businesses: Many businesses have low-revenue seasons that drain working capital built up during high-revenue periods.
Large upcoming obligations: Tax payments, loan maturities, or large supplier invoices can temporarily squeeze working capital even in a healthy business.
How to Improve Your Working Capital
Collect receivables faster. Shorter payment terms, prompt invoicing, and active follow-up on late payments all convert accounts receivable into cash faster. See our guide on accounts receivable management.
Extend payables strategically. Pay suppliers on the due date rather than early. The extra days keep cash in your account longer.
Reduce unnecessary inventory. Inventory is current assets, but it's less liquid than cash. Tighter inventory management converts working capital to a more usable form.
Build a cash reserve. Set aside a portion of revenue during good months to cover working capital needs in lean months.
Consider a line of credit. A business line of credit provides a buffer you can draw on during temporary working capital shortfalls. Use it as a bridge, not a permanent fix for structural working capital problems.
Working Capital and Cash Flow
Working capital and cash flow are related but different. Working capital is a snapshot — how much of a buffer exists at a moment in time. Cash flow is a movie — how money moves through the business over time. Strong working capital makes cash flow problems easier to weather; good cash flow management is how you build working capital. For more on both, see our guides on what cash flow is and cash flow management for small businesses.
The Bottom Line
Working capital is the financial cushion that lets a business absorb the unexpected without a crisis. Calculate yours, understand what's in it, and take specific actions — collecting faster, extending payables strategically, building reserves — to keep it positive and appropriately sized for your business.
Want the first report without wrestling a spreadsheet?
Upload one bank statement. Compass categorises the transactions, flags invoice gaps, and gives you an owner-readable report in about ten minutes.
Start free trial