Working capital is current assets minus current liabilities — what a business owns or expects to collect within a year, less what it owes in the same period. It is the clearest single measure of whether a business can meet its obligations without new financing.
Calculating what your business needs
Start with total fixed monthly costs: payroll, rent, insurance, loan payments, software, utilities. Then measure your average collection period — how many days pass between delivering and being paid. A business with $60,000 in monthly fixed costs and a 45-day collection cycle needs roughly one and a half months of costs available at any moment simply to stay level, before allowing for anything unexpected.
A common target is one to three months of operating expenses held in liquid form. Businesses paid at the point of sale can sit at the lower end. Businesses invoicing on net-60 terms should sit at the higher end.
Where the gap usually comes from
- Timing. Profitable work that has not yet been paid for.
- Seasonality. Fixed costs continuing through a predictable slow period.
- Growth. A larger order requiring a larger outlay before the payment arrives.
- Shock. Equipment failure, a lost receivable, an insurance deductible.
Three of those four are solvable with financing. The fourth situation to watch for is different: if operating costs consistently exceed revenue, that is a margin problem, and financing it postpones the issue rather than fixing it.
A worked example
A commercial cleaning company bills $180,000 a month on net-45 terms and runs $150,000 in monthly costs, most of it payroll paid every two weeks. It is comfortably profitable. It is also structurally short roughly six weeks of payroll, because staff are paid long before clients settle. Financing that gap with a line of credit costs interest only on the days money is drawn, and the alternative — turning down contracts to stay within cash — costs far more in lost margin.
Choosing a structure
Match the tool to the shape of the gap. A recurring, unpredictable gap suits a revolving line of credit. A single, known need suits a short-term loan. Variable revenue suits revenue-based financing. Urgency with strong daily receipts often points to a merchant cash advance, at a higher cost.
Improving working capital without borrowing
Financing is one lever, and it is worth pulling the cheaper ones first: invoice on the day work completes rather than at month end, ask for deposits on large jobs, negotiate longer supplier terms, clear slow-moving inventory, and follow up receivables at 30 days rather than 60. Many businesses find that tightening the cycle by two weeks removes most of the gap they were about to finance.