Table of Contents
Working capital is the cash a business has available to cover its day-to-day operations, payroll, rent, inventory, and short-term bills, after accounting for what it owes in the near term. It's one of the clearest signals of whether a business can keep running smoothly month to month.
The formula
Working Capital = Current Assets − Current Liabilities.
Current assets are cash, accounts receivable, and inventory, anything that will convert to cash within a year. Current liabilities are accounts payable, short-term debt, and any bill due within a year. Positive working capital means you have more short-term resources than short-term obligations; negative means the opposite.
The working capital ratio
Working Capital Ratio = Current Assets ÷ Current Liabilities. A ratio above 1.0 means you have more coming in than going out short-term. Most healthy small businesses aim for somewhere between 1.2 and 2.0, enough cushion to handle a slow month without being so high that cash is sitting idle instead of being reinvested.
Why businesses run short on working capital
- Growing too fast: more sales often means more inventory and more receivables tied up before the cash comes back, growth itself can strain working capital
- Slow-paying customers: receivables sitting past 60-90 days count as a current asset on paper but aren't actually available cash yet
- Too much cash tied up in inventory: overstocking ties up cash that could otherwise cover operating expenses
- Seasonal dips: a slow season with the same fixed costs can quietly erode working capital month by month
How to improve it without new financing
- Collect receivables faster, see accounts receivable and payable management
- Reduce excess inventory sitting unsold
- Negotiate longer payment terms with suppliers where the relationship allows it
- Shorten your cash conversion cycle, since working capital and the conversion cycle are measuring closely related things
When financing is the right call
If working capital is thin because of genuine, predictable seasonal patterns rather than a structural problem, a business line of credit sized to that seasonal gap is usually the cheapest fix. If the gap comes from slow-paying invoices specifically, invoice factoring addresses that more directly than a general credit line.
For how working capital fits into a broader cash management plan, see the complete guide to small business cash flow management.