Subtract current liabilities from current assets to measure the cushion that keeps the business running day to day.
Net working capital = current assets − current liabilities. Positive means the business can cover short-term obligations and fund operations; negative signals a potential cash crunch. Very high can mean cash or inventory sitting idle. Ideal levels vary by industry and growth stage. General information only.
Working capital is what's left when you subtract what the business owes soon from what it owns that's cash or soon-to-be-cash. It funds payroll, inventory, and the gap between paying suppliers and getting paid. Positive working capital is breathing room; negative means bills could outrun available cash.
Net working capital = current assets − current liabilities
Working capital is a timing measurement wearing a balance-sheet costume. Current assets are the things that will become cash within roughly a year — the bank balance, money customers owe you, inventory waiting to be sold. Current liabilities are the claims that fall due in the same window — supplier invoices, the credit-card balance, the next twelve months of loan principal, accrued wages and taxes. Subtract the second from the first and you get the cushion that stands between the business and the week a large bill arrives before a large payment does.
What it deliberately ignores is profitability. A business can post a good year and still hit a working-capital wall, because profit is recognised when the invoice is raised and cash arrives whenever the customer feels like paying. The opposite also holds: a loss-making business that has just raised money shows a comfortable cushion that says nothing about whether the model works. Working capital answers one question only — can we meet what falls due soon with what is coming soon.
The calculator opens with $180,000 of current assets and $110,000 of current liabilities. Net working capital is the subtraction: 180,000 − 110,000 = $70,000. The ratio is the division: 180,000 ÷ 110,000 = 1.64 : 1, meaning there is $1.64 of near-cash for every dollar falling due. The tool reads that as Healthy — comfortably above the 1.2 line where things get tight, and below the 2.0 line where the question flips from “can we pay” to “why is this much capital sitting idle.”
The $70,000 is the figure most people quote, but the ratio is the one that travels: $70,000 is generous against $110,000 of near-term obligations and almost meaningless against $2m of them. Quote the ratio when comparing to anyone else, and the dollar figure when deciding whether you can survive a specific bill.
Both inputs are aggregates, and aggregates conceal quality. The $180,000 of current assets might be $150,000 of cash, or it might be $150,000 of inventory nobody wants and receivables ninety days overdue. Neither of those pays payroll on Friday. This is exactly why the quick ratio exists — it strips inventory out and asks the harsher question. If your working capital looks fine but the bank balance keeps surprising you, the problem is almost always sitting inside the current-assets number rather than in the arithmetic.
The liabilities side has its own trap: the current portion of long-term debt belongs here, and it is the line owners most often forget, because the loan feels like a long-term thing. The next twelve payments are not. Leave them out and the cushion looks bigger than it is by exactly the amount you are certain to owe.
The genuine exception is worth knowing: some businesses run negative working capital by design and are perfectly healthy. Supermarkets and fast-turn retailers collect from customers at the till and pay suppliers on thirty- or sixty-day terms, so the float funds the operation. If that describes you, a negative number is a feature. If it does not, it is a deadline.
The first is reading the snapshot as a trend. Working capital measured right after a big customer paid flatters you; the same calculation a week earlier might not. Take it at consistent intervals. The second is confusing a working-capital problem with a profitability one and fixing the wrong one — cutting prices to chase volume when the real issue was receivables stretching from thirty days to sixty. The third is letting growth eat the cushion silently: every additional order ties up inventory and receivables before it returns any cash, which is why fast-growing businesses fail for cash reasons more often than failing ones do.
The single figure tells you where you stand today. What you actually need is where you will stand in six weeks, which is a schedule rather than a subtraction: receivables laid out by the week they are genuinely expected, payables by their due dates, payroll and rent on their fixed days, and the running balance underneath. That is a spreadsheet job, and it is the point at which the one-line answer stops helping. Our Small Business Bookkeeping template carries the asset and liability ledger those weekly figures come from.
Up to a point. Enough to operate comfortably is essential, but a very high figure can mean cash or inventory sitting idle instead of being invested in growth.
Yes — some (like fast-turn retailers) collect from customers before paying suppliers, running lean by design. Context matters; compare to your industry.
Related: current ratio calculator · quick ratio calculator · cash conversion cycle calculator · all free calculators.
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It uses standard formulas and recalculates the moment you change a value, so the math is exact for the inputs you enter. Treat the result as a reliable planning estimate; for decisions with legal or tax consequences, confirm the figures with a qualified professional.
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Last reviewed: September 2026. Free to use, no signup — Working Capital Calculator by ToolWise Digital.
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