How to Calculate Working Capital

Tracking Changes Over Time

Working capital is a snapshot. The change from one period to the next shows where cash went. If receivables and inventory grow faster than payables, operating working capital rises and cash falls, even in a profitable year. That is why the cash flow statement subtracts increases in operating working capital from net income.

Calculate it at least quarterly, and monthly if your business is seasonal. A retailer's position just before the holiday season can look very different from its year-end figure.

Common Mistakes

• Counting receivables you will not collect. Old or disputed invoices inflate current assets.

• Carrying obsolete inventory at full cost. Stock that will not sell at its book value overstates the result.

• Leaving out the current portion of debt. Principal due within a year belongs in current liabilities.

• Ignoring accrued expenses. Unpaid wages, taxes and bonuses are real obligations even before a bill arrives.

• Relying on a single date. One balance sheet can catch a business at an unusually good or bad moment.

How Lenders Use Working Capital

Lenders review working capital to judge short-term liquidity and to size lines of credit. Many commercial loan agreements include covenants that require a minimum working capital amount or a minimum current ratio. For asset-based loans, lenders focus on the quality of receivables and inventory, since those make up the borrowing base.

A business with thin or negative working capital may still qualify for financing, but it will need to show where the cash to cover current obligations will come from.

Frequently Asked Questions

Is negative working capital always a problem?
Not always. Some businesses collect cash from customers before paying suppliers and run negative working capital by design. For most small businesses, though, it is a warning sign.

Can a business have too much working capital?
Yes. Large idle cash balances or excess inventory can be money that would earn more elsewhere or pay down expensive debt.

Does a service business use the same formula?
Yes. Inventory is usually small or absent, so receivables and accrued payroll tend to drive the result.

Where do I find the numbers?
On your balance sheet. If your accounting system does not separate current and long-term items, ask your accountant to classify them.

Plan Ahead With Your Numbers

Once you know how to calculate working capital and track it over time, you can see a cash shortfall coming months in advance. If your numbers show a gap, compare lines of credit, receivables financing and term loans to find a structure that matches the way your business uses cash.

Knowing how to calculate working capital tells you whether your business has enough short-term assets to cover the bills coming due over the next year. The math is simple: current assets minus current liabilities. The judgment lies in deciding what belongs in each group and what the result means.

This guide covers the formula, a step-by-step example with a sample balance sheet, the ratios lenders pair with it, and common mistakes that make the number look better or worse than it really is.

The Working Capital Formula

Working capital = Current assets minus Current liabilities

Current generally means expected to be turned into cash, used up or paid within one year, or within the normal operating cycle if that is longer. A positive result means short-term resources exceed short-term obligations. A negative result means you would need new cash, from sales, borrowing or owners, to pay everything due in the coming year.

What Goes Into Each Side

Current assets typically include:

• Cash and cash equivalents

• Accounts receivable, net of an allowance for amounts you do not expect to collect

• Inventory, including raw materials, work in process and finished goods

• Prepaid expenses such as insurance or rent paid in advance

• Short-term investments

Current liabilities typically include:

• Accounts payable to suppliers

• Accrued expenses, such as wages, payroll taxes and interest owed but not yet paid

• Balances on revolving lines of credit

• The current portion of long-term debt, meaning principal due within the next 12 months

• Customer deposits and deferred revenue

• Income taxes payable

How to Calculate Working Capital Step by Step

Here is a hypothetical balance sheet for a small wholesaler.

1. List current assets. Cash $80,000, accounts receivable $220,000, inventory $150,000 and prepaid expenses $10,000.

2. Add them up. Total current assets are $460,000.

3. List current liabilities. Accounts payable $130,000, accrued expenses $40,000, current portion of long-term debt $50,000 and a line of credit balance of $60,000.

4. Add them up. Total current liabilities are $280,000.

5. Subtract. $460,000 minus $280,000 equals $180,000 of working capital.

Ratios That Go With It

A dollar figure on its own says little about scale. $180,000 is plenty for a small shop and thin for a large distributor. Two ratios put it in context.

• Current ratio. Current assets divided by current liabilities. In the example, $460,000 divided by $280,000 is about 1.64, or $1.64 of current assets for every $1.00 due.

• Quick ratio. Cash, receivables and short-term investments divided by current liabilities. It leaves out inventory and prepaid items because they are harder to turn into cash fast. In the example, $300,000 divided by $280,000 is about 1.07.

What counts as healthy varies by industry, so lenders compare your ratios with similar businesses and with your own past results.

Net Working Capital vs Operating Working Capital

The figure above is often called net working capital. Many analysts and lenders also look at operating working capital, which strips out cash and debt to focus on the accounts driven by day-to-day operations.

Operating working capital = (Accounts receivable + Inventory + Prepaid expenses) minus (Accounts payable + Accrued expenses)

For the wholesaler, that is $380,000 minus $170,000, or $210,000. This is the money tied up in running the business, and it is the figure that tends to grow as sales grow.