Working Capital Explained for Small Business Owners

Working capital is one of the simplest measures of short-term financial health. It tells you whether your business has enough short-term resources to cover its short-term bills. If it does, day-to-day operations can run smoothly. If it does not, even a profitable business can struggle to pay suppliers, staff and rent on time.

The term sounds technical, but the idea is practical. It asks a simple question: if the money coming in soon and the money going out soon were to meet, would you be in a good position?

This article explains what working capital is, how to calculate it, what the figure means, and how to use it alongside your cash flow. Round numbers are used throughout so you can check every step.

What working capital means

Working capital is the money your business has available to run its daily operations. It is calculated from the balance sheet, using figures taken at a single date.

Two groups of items make it up:

• Current assets are things your business owns that are expected to turn into cash within about a year. Examples include cash, money owed by customers (accounts receivable) and stock (inventory).
• Current liabilities are debts your business must pay within about a year. Examples include money owed to suppliers (accounts payable), loan repayments due soon, and bills that have been incurred but not yet paid (accrued expenses).

The formula

Working capital = Current assets - Current liabilities

A positive result means current assets are greater than current liabilities. A negative result means short-term debts are greater than short-term assets. Both are worth examining, but a negative figure does not always signal trouble for every business type. Some business models, such as those where customers pay at the point of sale while suppliers are paid on longer terms, can operate with low or negative figures.

Many owners also look at the current ratio, which is current assets divided by current liabilities. A ratio above 1 means current assets exceed current liabilities. What counts as a healthy ratio varies by industry, so compare your figures with your own history and with businesses similar to yours.

A worked example with round numbers

Consider a small wholesale business with these items on its balance sheet at 31 March.

Current assets:

• Cash: $10,000
• Accounts receivable (money customers owe): $8,000
• Inventory (stock): $12,000

Current liabilities:

• Accounts payable (money owed to suppliers): $9,000
• Loan repayments due within a year: $3,000
• Accrued expenses (bills owed but not yet paid): $2,000

Step 1: Add the current assets. $10,000 + $8,000 + $12,000 = $30,000

Step 2: Add the current liabilities. $9,000 + $3,000 + $2,000 = $14,000

Step 3: Calculate working capital. $30,000 - $14,000 = $16,000

Check: the business has $16,000 more in short-term resources than short-term debts. The current ratio is $30,000 / $14,000 = 2.14, to two decimal places.

If the result is negative, do not panic, but do investigate. Look at what is driving it. Is it a large loan repayment falling due, a build-up of unpaid bills, or a drop in cash? The answer determines the action you take. A short conversation with your bank or accountant can help you decide.

Why cash can fall while working capital stays the same

This is a key point. Working capital can stay the same while cash changes, because cash and inventory are both current assets. Suppose the business spends $5,000 of its cash buying extra stock.

• Cash falls from $10,000 to $5,000.
• Inventory rises from $12,000 to $17,000.
• Total current assets stay the same: $5,000 + $8,000 + $17,000 = $30,000.
• Working capital stays at $16,000.

On paper, nothing has changed. But the business now has half as much cash to pay bills next week. This is why working capital should be read alongside a cash flow forecast, not on its own.

What makes working capital go up or down

Working capital changes whenever the balance sheet changes. Common causes include:

• Customers paying later, which increases accounts receivable and can reduce cash.
• Stock building up, which increases inventory and ties up cash.
• Suppliers being paid faster, which reduces both accounts payable and cash.
• Taking on a long-term loan, which can add cash, while only the part due within a year counts as a current liability.

Each of these changes affects cash timing as well as the balance sheet, so it is worth asking how each movement will affect your bank balance over the next few months.

Working capital and growth

Growing businesses often need more working capital. More sales usually mean more stock to buy, more customers waiting to pay, and more suppliers to pay. A business can be profitable and still need extra working capital to fund that growth. This is one reason fast growth can strain cash, even when the business is doing well.

Before a planned expansion, estimate how much extra stock and credit you will need, and when. Then check that your cash buffer can cover the gap between paying suppliers and receiving customer payments.

Warning signs to watch

Some patterns deserve attention, even if the total working capital figure still looks positive:

• Working capital falls steadily for several months.
• A large share of current assets is stock that sells slowly.
• Customer debts are growing faster than sales.
• Short-term debts are rising while cash is falling.

Each of these can be a sign that cash will be tight later, even if the balance sheet looks strong today.

How to improve working capital

Options include speeding up customer payments, reviewing stock levels to avoid excess, agreeing longer payment terms with suppliers where that is fair, and reviewing short-term debts. Reducing stock can free up cash, but holding too little can cost sales, so balance is important.

Borrowing is another option, but it adds repayment obligations. Discuss it with a bank or qualified adviser before you decide. For practical steps on cash timing, read How to Improve Cash Flow in a Small Business.

Track working capital each month

Calculate working capital at the end of each month using the balance sheet, and record it in a simple table. Look for trends rather than single figures. A steady decline over several months is a warning sign worth investigating.

Working capital checklist

1. Take the total current assets from your balance sheet.
2. Take the total current liabilities from the same date.
3. Subtract liabilities from assets to get working capital.
4. Compare the figure with last month and with the same month last year.
5. Check cash and stock separately, since they can offset each other.
6. Compare the result with your cash-flow forecast.

Frequently asked questions

Is positive working capital always good?

Usually it is a sign of short-term strength, but not always. Cash tied up in slow-moving stock or unpaid invoices can inflate the total while actual cash is scarce. Look at what makes up current assets as well as the total.

What is the difference between working capital and cash flow?

Working capital is a balance sheet figure at one point in time. Cash flow measures money moving in and out over a period. They are related, but one does not replace the other.

Can a profitable business have negative working capital?

Yes, it can. Some business models collect cash quickly and pay suppliers later. Still, negative working capital needs careful watching, because it leaves less room for surprises. A qualified accountant can review your balance sheet with you.

Do I need an accountant to calculate working capital?

No. You can calculate it yourself from a balance sheet. An accountant can help you check the figures and understand what they mean for your specific business.