Working Capital Calculator

What is Working Capital?

Working capital is the money your business has available to run its day-to-day operations. It compares what you own that can become cash within a year — your current assets — with what you owe within the same year — your current liabilities. The difference is the buffer that pays salaries, restocks inventory, and absorbs a slow month without drama.

Current assets typically include your bank balances, unpaid customer invoices (accounts receivable), inventory, and short-term prepayments. Current liabilities include supplier invoices you have not yet paid (accounts payable), VAT and payroll taxes owed, short-term loans, and the portion of longer loans due within twelve months.

Because both numbers come straight off your balance sheet, working capital is one of the quickest health checks available: a single subtraction tells you whether your short-term obligations are funded by short-term resources — or by hope.

The Formula, with a Worked Example

Working Capital = Current Assets − Current Liabilities

The same two numbers also produce the working capital ratio (also called the current ratio), which expresses the relationship as a multiple instead of an amount:

Working Capital Ratio = Current Assets / Current Liabilities

Take a wholesale business with €250,000 of current assets — say €80,000 in the bank, €90,000 of customer invoices outstanding, and €80,000 of inventory — against €150,000 of current liabilities in supplier invoices, taxes, and a short-term credit line.

• Working capital: 250,000 − 150,000 = €100,000
• Ratio: 250,000 / 150,000 = 1.67

Both views matter. The euro figure tells you the size of your buffer; the ratio tells you how comfortably obligations are covered regardless of company size. A €100,000 buffer is generous for a small agency and thin for a manufacturer with €2 million of annual purchases — the ratio of 1.67 reads the same either way.

Positive vs Negative Working Capital

Positive working capital means current assets exceed current liabilities: if every short-term bill came due tomorrow, you could cover it by converting short-term assets. It buys flexibility — the ability to take on a big order, survive a late-paying customer, or negotiate with suppliers from a position of strength.

Negative working capital means the opposite: obligations due within a year exceed the resources available to meet them. For most businesses this is a warning sign, because it implies dependence on new sales, fresh credit, or supplier patience just to stay current. It is one of the most common precursors to a cash crisis in otherwise profitable companies.

There is an important exception. Businesses that collect cash from customers before paying their suppliers — supermarkets, e-commerce shops, subscription software — can run negative working capital safely, because customer cash arrives ahead of the bills it funds. The test is not the sign of the number but the timing of the flows: if cash reliably lands before liabilities fall due, negative working capital can even be a sign of an efficient model. Your cash conversion cycle is the metric that captures that timing.

Reading the Working Capital Ratio

As general guidance — sensible levels vary by industry and business model:

• Below 1: warning zone. Current liabilities exceed current assets; check whether incoming cash covers upcoming due dates.
• 1 to 2: generally a healthy zone. Obligations are covered with a buffer, without hoarding resources.
• Well above 2: comfortable, but possibly inefficient — large cash balances or slow-moving inventory might be put to better use paying down debt, funding growth, or being returned to owners.

As with most financial ratios, the trend is more informative than any snapshot. A ratio drifting from 1.8 towards 1.1 over four quarters tells you liquidity is tightening long before the bank balance does.

How to Improve Your Working Capital

Working capital improves when current assets grow, current liabilities shrink, or — more usefully — when the same business is run with less cash locked up. The main levers:

• Collect receivables faster. Every day cut from your DSO converts invoices into bank balance sooner. Invoice immediately, use payment links, and chase systematically.
• Hold less slow-moving inventory. Stock is the least liquid current asset. Reorder in smaller batches, clear dead stock, and track what actually turns.
• Negotiate supplier terms. Moving key suppliers from 15-day to 30- or 45-day terms finances your operations interest-free — without reducing working capital in euros, it reduces how much of it you need.
• Refinance short-term debt. Converting an overdraft or short-term loan into longer-term financing moves the liability out of the current bucket and relieves near-term pressure.
• Retain profits. The most durable source of working capital is profit left in the business rather than distributed.

Because working capital is a snapshot, pair it with a forward view: a 12-month cash flow forecast shows whether today's buffer survives next quarter's tax bill and seasonal dip. That forward view is exactly what Trezy's cash flow management automates from your bank data.

Frequently Asked Questions

What is working capital?

Working capital is the difference between your current assets (cash, receivables, inventory and other assets convertible to cash within a year) and your current liabilities (supplier invoices, short-term debt, taxes and other obligations due within a year). It measures the short-term financial buffer your business has to fund day-to-day operations.

How do I calculate working capital?

Working capital = current assets minus current liabilities. For example, with €250,000 of current assets and €150,000 of current liabilities, working capital is €100,000. Dividing instead of subtracting gives the working capital ratio: 250,000 / 150,000 = 1.67.

What is a good working capital ratio?

As general guidance, a ratio below 1 means current liabilities exceed current assets and deserves a warning flag, a ratio between 1 and 2 is generally considered a healthy zone, and a ratio well above 2 may indicate cash or inventory sitting idle that could be put to work. Sensible levels vary by industry and business model.

Is negative working capital always bad?

Usually it is a warning sign, because it means short-term obligations exceed short-term resources. However, some business models operate safely with negative working capital, for example retailers or subscription businesses that collect cash from customers before paying suppliers. What matters is whether cash reliably arrives before the bills fall due.

How can I improve my working capital?

The main levers are collecting receivables faster (lower DSO), holding less slow-moving inventory, negotiating longer payment terms with suppliers, converting short-term debt into longer-term financing, and retaining profits in the business. Small improvements on each lever compound into a meaningfully stronger cash position.