Working capital is one of those terms that gets used constantly in business finance without always being properly understood. It is not the same as profit, revenue, or the balance in a business bank account, though it is related to all three. Working capital measures whether a business has enough short-term resources to cover its short-term obligations, and getting this wrong is one of the most common reasons a profitable business still runs into trouble.
This is the final article in our small business cash flow cluster, alongside our guides to cash flow KPIs, the cash conversion cycle, and practical cash flow improvements.
What Is Working Capital?
Formula: Working Capital = Current Assets − Current Liabilities
Current assets are resources that can reasonably be converted to cash within twelve months, including cash itself, accounts receivable, and stock. Current liabilities are obligations due within the same twelve month period, including accounts payable, short-term loans, and any tax due in the near term. The resulting figure shows whether a business has enough short-term resources to meet its short-term obligations without needing to sell long-term assets or take on new financing.
A Worked Example
| Current Assets | Amount |
|---|---|
| Cash in bank | £8,000 |
| Accounts receivable | £12,000 |
| Stock | £5,000 |
| Total current assets | £25,000 |
| Current Liabilities | Amount |
|---|---|
| Accounts payable | £9,000 |
| Short-term loan repayments due | £4,000 |
| VAT due | £3,000 |
| Total current liabilities | £16,000 |
Working Capital = £25,000 − £16,000 = £9,000. This business has £9,000 more in short-term resources than it owes in the same period, indicating a reasonably comfortable short-term financial position.
The Working Capital Ratio
Alongside the raw figure, the working capital ratio expresses the same relationship as a proportion rather than an absolute number, which makes it easier to compare across time or against other businesses.
Formula: Working Capital Ratio = Current Assets ÷ Current Liabilities
Using the example above: £25,000 ÷ £16,000 = 1.56. A ratio above 1 means current assets exceed current liabilities. A ratio between 1.2 and 2 is generally considered healthy for most small businesses, though the right figure varies by industry and how predictable the business’s cash flow is.
What Negative Working Capital Means
Negative working capital, where current liabilities exceed current assets, is not automatically a crisis. Some business models, particularly subscription services and certain retailers with strong supplier terms, operate with negative working capital as a structural feature, since they collect cash from customers before paying suppliers. For most small businesses, however, persistently negative working capital signals a genuine risk of being unable to meet short-term obligations without additional borrowing.
Working Capital vs Cash Flow: What Is the Difference?
These two terms are often used interchangeably, but they measure different things. Working capital is a snapshot at a single point in time, taken from the balance sheet. Cash flow measures movement over a period, tracking how cash actually moves in and out. A business can have positive working capital on paper while still experiencing a cash flow problem if too much of its current assets are tied up in slow-moving stock or receivables that are difficult to collect. This is why working capital is best read alongside the metrics covered in our cash flow KPIs guide rather than in isolation.
How to Improve Working Capital
- Speed up collections. Reducing Days Sales Outstanding directly increases the cash portion of current assets. See our full guide on improving cash flow for specific tactics.
- Reduce excess stock. Stock that sits unsold ties up current assets without generating cash, weakening the practical strength of the working capital figure even though it appears on the asset side.
- Negotiate supplier payment terms. Extending payment terms, done carefully and with agreement, reduces the immediate pressure of current liabilities.
- Review short-term borrowing structure. Where possible, converting short-term debt into longer-term financing removes it from the current liabilities calculation and improves the working capital position, though this comes with its own trade-offs in interest cost.
Working Capital Benchmarks by Business Type
| Business Type | Typical Working Capital Pattern |
|---|---|
| Service business, low stock | Usually positive, driven mainly by receivables and cash |
| Retailer with physical stock | Moderate, stock forms a large share of current assets |
| Subscription or SaaS business | Can be negative and still healthy, due to upfront collection |
| Manufacturer | Often requires higher working capital due to raw material and production cycles |
Frequently Asked Questions
What is a good working capital ratio for a small business?
A ratio between 1.2 and 2 is generally considered healthy for most small businesses, though the right figure depends on the industry and how predictable the business’s cash flow is. A ratio significantly above 2 can sometimes indicate too much cash sitting idle rather than being reinvested.
Is negative working capital always a bad sign?
Not always. Subscription businesses and certain retailers with strong supplier terms can operate sustainably with negative working capital as a structural feature of their business model. For most other small businesses, persistent negative working capital is a genuine warning sign worth investigating.
How often should working capital be checked?
Monthly review alongside standard management accounts is sufficient for most small businesses, since the underlying balance sheet items tend to shift gradually rather than suddenly, unless the business is going through rapid growth or a significant change in payment terms.
Does working capital include long-term loans or assets?
No. Working capital specifically covers current assets and current liabilities, meaning items expected to convert to cash or come due within twelve months. Long-term loans, property, and equipment are excluded from the calculation entirely.
About the author: The Business To World editorial team covers practical business, banking, investment and property guidance for UK small business owners and entrepreneurs.