Working capital is the money available to fund your business’s day-to-day operations. It’s calculated as the difference between your current assets (things you own that can be converted to cash within a year) and your current liabilities (debts and obligations due within a year).
| Working Capital = Current Assets − Current Liabilities Current assets include: cash, money owed by customers (debtors), and stock. Current liabilities include: money you owe to suppliers (creditors), VAT due, PAYE due, and short-term loans. |
If your current assets exceed your current liabilities, you have positive working capital, meaning you can comfortably meet your short-term obligations. If your current liabilities exceed your current assets, you have negative working capital, which can signal cash flow problems ahead.
Why is Working Capital Important?
Working capital is essentially the financial fuel that keeps your business running from one day to the next. Without sufficient working capital, you may struggle to:
- Pay suppliers on time
- Cover wages on payday
- Replenish stock to fulfil customer orders
- Absorb unexpected costs or a slow sales period
Many businesses that appear profitable on paper fail because they run out of working capital. This is particularly common in fast-growing businesses where cash tied up in stock and unpaid invoices outpaces cash coming in.
| 📊 Example A UK wholesaler has: • Cash in bank: £12,000 • Outstanding invoices from customers: £28,000 • Stock: £15,000 • Total Current Assets: £55,000 • Supplier invoices due: £22,000 • VAT due next month: £8,400 • Total Current Liabilities: £30,400 Working Capital = £55,000 − £30,400 = £24,600 ✓ Positive |
What is the Working Capital Cycle?
The working capital cycle (also called the cash conversion cycle) describes the time it takes for your business to convert money spent on stock or services into cash received from customers. The shorter your cycle, the less working capital you need.
- Buy raw materials or stock → money goes out
- Produce goods or deliver services → resources are consumed
- Sell to customers → revenue is recognised
- Collect payment → cash comes back in
The gap between paying out and receiving payment is the working capital cycle. Businesses with long cycles (e.g. construction, manufacturing) need much more working capital than those with short cycles (e.g. retail, where customers pay immediately).
How to Improve Working Capital
- Invoice promptly and chase payment proactively
- Offer early payment discounts to speed up customer payments
- Negotiate extended payment terms with your own suppliers
- Reduce stock levels, don’t tie up cash in excess inventory
- Consider invoice financing or a business overdraft for a working capital buffer
- Review your pricing, thin margins reduce the cash available at every stage of the cycle
Frequently Asked Questions
The working capital ratio (current assets ÷ current liabilities) should ideally be between 1.5 and 2.0. Below 1.0 means liabilities exceed assets, which is a warning sign. Above 2.0 may suggest cash is being held unproductively rather than being invested in growth.
No. Working capital is a snapshot of your financial position at a point in time. Cash flow measures the movement of money over a period. You can have good working capital but still have a cash flow problem if customers are slow to pay.
In some industries, yes. Supermarkets, for example, often have negative working capital because customers pay immediately but they have long payment terms with suppliers. This model only works if sales volume is consistently high.
