What Is Working Capital? Formula, Examples and Why It Matters
Working capital is current assets minus current liabilities. It measures whether a business has enough short-term resources (cash, money owed by customers, stock) to cover the bills due in the coming year. Positive working capital means short-term assets exceed short-term debts; negative means they don't.
The formula is simple. What makes working capital worth understanding is what it says about how quickly money moves through a business, and why two companies with the same profit can have very different amounts of breathing room.
What is working capital?
Working capital compares two groups of balance-sheet items:
- Current assets: things expected to become cash within about a year. Cash itself, accounts receivable (money customers owe), inventory, and prepaid expenses.
- Current liabilities: obligations due within about a year. Accounts payable (money owed to suppliers), wages and taxes due, and the portion of loans repayable within the year.
Exact classification rules come from the accounting framework a business uses, but the idea is consistent: can what you'll collect soon cover what you'll pay soon?
How do you calculate working capital?
Working capital = Current assets − Current liabilities
Here is a small distribution business at the end of a quarter:
| Current assets | Amount | Current liabilities | Amount due |
|---|---|---|---|
| Cash | $12,000 | Supplier invoices (payables) | $22,000 |
| Customer invoices (receivables) | $30,000 | Loan repayments due this year | $8,000 |
| Inventory | $18,000 | Taxes and wages due | $5,000 |
| Total | $60,000 | Total | $35,000 |
Working capital is $60,000 − $35,000 = $25,000. Notice that only $12,000 of the assets is actually cash. The rest has to be sold or collected first, which is why working capital and your monthly cash position are related but not the same thing.
What is the current ratio?
The current ratio expresses the same comparison as a ratio instead of an amount:
Current ratio = Current assets ÷ Current liabilities
For the example above, $60,000 ÷ $35,000 ≈ 1.71: $1.71 of short-term assets for every $1 of short-term obligations. A ratio is easier to compare across businesses of different sizes, but what counts as "healthy" varies widely by industry. A supermarket and a software consultancy will look very different.
A stricter version, the quick ratio, leaves inventory out, because stock can take a long time to sell. Here that is ($12,000 + $30,000) ÷ $35,000 = 1.2.
What is the working capital cycle?
The balance sheet is a snapshot. The working capital cycle (or cash conversion cycle) describes the movement: how many days pass between paying for stock and collecting cash from the customer who bought it.
Cash conversion cycle = Days inventory held + Days to collect from customers − Days to pay suppliers
If the distributor holds stock for 45 days, collects from customers in 40 days and pays suppliers in 30 days, the cycle is 45 + 40 − 30 = 55 days. For 55 days, every sale is funded by the business itself. The longer the cycle and the higher the sales, the more cash the business needs to operate. That is the mechanism behind growing businesses running short of cash.
The "days to collect" figure is your days sales outstanding, explained in accounts receivable explained.
Working capital vs cash flow vs profit
| Measure | Question it answers | Where it comes from |
|---|---|---|
| Profit | Did the business earn more than it spent over a period? | Profit and loss statement |
| Cash flow | Did more money come into the bank than went out over a period? | Cash flow statement or forecast |
| Working capital | Do short-term assets cover short-term obligations right now? | Balance sheet |
The three move independently. A business can make a profit while its cash falls, because money is flowing into receivables and stock, and working capital is the balance-sheet view of exactly that.
How does working capital work in a service business?
A consultancy, agency or freelancer usually has no stock, so it's tempting to think working capital doesn't apply. It does, in a different form. The "inventory" is work in progress: hours your team has already worked, and been paid for, but that you haven't yet invoiced.
An agency billing at the end of each three-month project, and giving clients 30 days to pay, may fund four months of salaries before any cash arrives. Monthly or milestone invoicing, deposits and prompt billing are the service-business equivalents of keeping stock lean.
Is negative working capital always bad?
Not necessarily. Negative working capital means current liabilities exceed current assets. For most small businesses that is a warning sign: there may not be enough coming in to meet what is going out.
But some business models run this way deliberately. A business that is paid immediately by customers, holds little stock and pays suppliers on 30 or 60 days collects cash before it pays for the goods it sold. Many retailers and subscription businesses with up-front payments work like this. The question isn't only whether the number is negative, but whether the business reliably collects before it has to pay.
How does working capital change in a seasonal business?
Seasonal businesses often need the most working capital just before their busiest period. A garden centre buys stock in late winter, a gift retailer stocks up in autumn, a tour operator pays deposits to hotels months before travellers pay the balance. Cash goes out first; sales come later.
The practical response is to plan the peak in advance: know the month when stock and receivables will be highest, and arrange finance or build a cash reserve before it arrives rather than during it.
What are signs a business is short of working capital?
- Paying suppliers late becomes routine rather than exceptional.
- The overdraft is in use for most of the month.
- Growth opportunities are turned down because stock can't be funded.
- Supplier discounts for early payment are regularly missed.
- Tax or payroll dates cause a scramble each time.
How can a business improve working capital?
| Lever | What to do | Effect |
|---|---|---|
| Collect faster | Invoice on delivery, take deposits, follow up on overdue invoices | Lower receivables, more cash |
| Hold less stock | Reorder closer to demand, clear slow-moving lines | Less cash tied up on shelves |
| Pay suppliers on terms | Use the full agreed term, negotiate longer terms where fair | Cash stays in the business longer |
| Match finance to the asset | Fund equipment with longer-term finance, not day-to-day cash | Short-term cash isn't used for long-term purchases |
Paying suppliers late beyond agreed terms isn't a sustainable lever. It damages relationships and, in some countries, can trigger statutory late-payment interest. Aim to align terms, not to stretch them.
Key takeaway
Working capital tells you whether short-term resources cover short-term obligations. The working capital cycle tells you how long each sale ties up your money. Watching both, and acting on collections, stock and supplier terms, keeps a business from being profitable on paper and stretched in practice.