Working Capital: What It Is and How Much Your Small Business Needs
Working capital is the money a business has available to run day to day. It’s the cushion that pays wages, suppliers, and rent while you wait for customers to pay you. A business with too little working capital can be profitable and still struggle every month. One with enough can take on bigger jobs, buy stock at better prices, and sleep through a slow week.
This guide explains working capital in plain English, walks through an illustrative example for a small wholesale business, and covers practical ways to improve it.
What Is Working Capital?
Working capital = Current assets − Current liabilities
- Current assets are things you own that will turn into cash within about a year: cash in the bank, money customers owe you (accounts receivable), and inventory.
- Current liabilities are bills due within about a year: money you owe suppliers (accounts payable), credit card balances, short-term loans, the next 12 months of payments on longer loans, and taxes due.
Positive working capital means your short-term resources cover your short-term bills. Negative working capital means they don’t, at least on paper.
A related measure is the current ratio:
Current ratio = Current assets ÷ Current liabilities
A ratio above 1 means you have more short-term assets than short-term bills. Many lenders like to see something comfortably above 1, though the right level depends on your industry.
Worked Example: A Small Restaurant Supply Wholesaler
A family business sells cleaning products and disposables to local restaurants. Its balance sheet at the end of the month shows:
| Current assets | Amount |
|---|---|
| Cash | $18,000 |
| Accounts receivable (restaurants on 30-day terms) | $42,000 |
| Inventory | $55,000 |
| Total | $115,000 |
| Current liabilities | Amount |
|---|---|
| Accounts payable to suppliers | $38,000 |
| Credit line balance | $20,000 |
| Payroll and sales tax due | $7,000 |
| Total | $65,000 |
Working capital = $115,000 − $65,000 = $50,000
Current ratio = $115,000 ÷ $65,000 = 1.77
That looks healthy. But look closer: only $18,000 is cash. Most of the assets are tied up in receivables and stock. If two big customers pay 30 days late and the business has to pay its supplier on time, the cash could run short.
The owner tests a quick fix. If she tightens collections so receivables drop to $30,000, $12,000 is freed up as cash. If she cuts slow-moving stock by $10,000, she frees up more. Working capital stays about the same, but far more of it is in the bank, ready to use.
How Much Working Capital Do You Need?
There’s no single answer, but a practical approach is:
- Work out your monthly operating costs (all fixed costs plus typical variable costs).
- Look at how long it takes from paying for materials or labor to collecting from customers. This is often called the cash conversion cycle.
- Aim to have at least enough working capital to cover that gap, plus a buffer for a slow month.
For example, if you spend $40,000 a month and it takes about 45 days from paying suppliers to getting paid, you need roughly $60,000 tied up in the business just to keep running, before any buffer.
A separate reserve is wise too. The guide to how much to keep in an emergency fund covers the thinking.
How to Improve Working Capital
- Collect faster. Invoice immediately, offer easy payment options, and follow up on day one of lateness. Review your Net 30 payment terms.
- Take deposits. For large orders or projects, ask for part of the payment up front.
- Trim inventory. Sell off slow movers and reorder in smaller, more frequent batches.
- Negotiate supplier terms. Longer terms with suppliers keep cash in your account longer.
- Use credit carefully. A line of credit can smooth gaps, but it’s a current liability and costs interest.
- Watch growth. Fast growth uses working capital, because you pay for more stock and labor before the bigger invoices are paid. The guide to cash flow vs profit explains why.
For day-to-day cash fixes, see small business cash flow problems.
Frequently Asked Questions
What is the formula for working capital?
Working capital equals current assets minus current liabilities. A business with $115,000 in cash, receivables, and inventory and $65,000 in short-term bills has $50,000 in working capital.
What is a good working capital ratio?
A current ratio above 1 means short-term assets exceed short-term bills. Many small businesses aim for something comfortably above that, but the right level depends on your industry, how fast you collect, and how much inventory you carry.
Can working capital be negative?
Yes. It means short-term bills are larger than short-term assets. Some businesses that collect cash immediately and pay suppliers later can run this way, but for most small businesses it’s a warning sign.
Is working capital the same as cash?
No. Cash is one part of working capital. Receivables and inventory count too, but they aren’t available to spend until they turn into cash.
How do I increase working capital without a loan?
Collect receivables faster, take deposits, reduce excess stock, negotiate longer supplier terms, and keep more profit in the business rather than taking it all out.
