Business Finance • Cash Flow Learning Path

Working Capital: Formula, Examples, and Practical Management

Working capital is current assets minus current liabilities. It measures a business’s short-term financial cushion, but it does not tell you how much cash is available today. Good working capital management connects collections, inventory, vendor payments, and liquidity planning.

By Taylor Frizzell, MBA • Updated October 21, 2026

The working capital formula

Net working capital = Current assets − Current liabilities

Current assets commonly include cash, receivables, inventory, and prepaid expenses. Current liabilities commonly include accounts payable, accrued payroll and expenses, taxes payable, and the current portion of debt. Classification depends on the operating cycle and reporting framework.

If current assets total $100,000 and current liabilities total $65,000, net working capital is $35,000. This is a balance-sheet measure at a specific date.

Why positive working capital does not guarantee cash

Suppose those assets consist of $10,000 cash, $40,000 receivables, $45,000 inventory, and $5,000 prepayments. The company has positive working capital, yet only $10,000 in cash. Overdue customer invoices, slow-moving stock, and prepayments cannot necessarily fund payroll this week. Payment dates and asset quality matter as much as the total.

Review receivable collectibility, inventory obsolescence, restrictions on cash, and the timing of liabilities before judging liquidity. The Cash Flow Management guide explains how to turn these balances into a payment forecast.

Net working capital vs. operating working capital

Net working capital usually includes all current assets and current liabilities. An operating working-capital measure focuses on the balances tied to operations, often excluding cash and interest-bearing debt. One simplified version is accounts receivable plus inventory minus trade accounts payable. Other analyses include operating prepayments and accruals. State your definition explicitly before comparing companies or periods.

A rise in operating working capital generally absorbs cash, all else equal. It can represent healthy growth, inefficient collections, excessive stock, or a combination. Explain the cause before deciding how to respond.

Growth can increase cash needs

A company can sell more while becoming less liquid. It may purchase stock and pay employees before customers pay. If receivables rise $20,000, inventory rises $15,000, and trade payables rise $10,000, simplified operating working capital increases $25,000.

$20,000 + $15,000 − $10,000 = $25,000 additional cash tied up in operations.

This simplified example assumes no other adjustments. A sales forecast should therefore include collection timing, purchasing requirements, and supplier terms. Revenue growth alone does not establish how much financing is needed.

Manage the three main operating balances

Accounts receivable

Invoice promptly, confirm billing accuracy, resolve disputes, establish appropriate credit terms, and follow up consistently. Review aging by customer rather than relying only on the total. Monitor collection speed and concentration risk. Faster collections release cash without requiring more sales, provided they do not come at an excessive discount or damage valuable relationships.

Inventory

Match purchases to demand and lead times. Separate fast-moving items from slow or obsolete stock. Excess inventory absorbs cash and adds carrying costs; cutting too deeply can cause stockouts and lost sales. Set purchasing decisions around service levels, supplier reliability, and realistic sales expectations.

Accounts payable

Use agreed payment terms and schedule disbursements deliberately. Evaluate early-payment discounts against liquidity and financing costs. Negotiate changes before a shortage becomes urgent. Deliberately missing due dates may preserve cash briefly while creating penalties, supply interruptions, and reputational costs.

Metrics to use together

• Current ratio: current assets divided by current liabilities.
• Quick ratio: commonly cash, short-term investments, and receivables divided by current liabilities; definitions vary.
• DSO: estimates the receivable collection period.
• DIO: estimates days inventory remains on hand.
• DPO: estimates supplier payment timing.
• Cash conversion cycle: DIO + DSO − DPO.

A ratio is a prompt for investigation. Compare consistent definitions, comparable periods, and businesses with similar operating models. No universal current-ratio or working-capital target fits every industry.

Is negative working capital always bad?

No. A retailer that collects immediately and pays suppliers later may operate with negative working capital as part of its normal model. A company with overdue liabilities and uncollectible receivables may be in distress. Distinguish contractual timing advantages from an inability to pay. Subscription models, seasonality, and industry practices can also affect interpretation.

A monthly review routine

1. Reconcile receivable and payable subledgers to the general ledger.
2. Review aging, disputed balances, inventory quality, and near-term commitments.
3. Calculate working capital and timing metrics using consistent definitions.
4. Explain changes against sales, purchasing, and payment behavior.
5. Assign specific collection, inventory, and payment actions.
6. Update the cash forecast and review the lowest projected cash balance.

Frequently asked questions

Is working capital the same as profit?

No. Working capital compares short-term assets and liabilities at a date. Profit measures recognized revenue less expenses over a period.

Does collecting an invoice increase net working capital?

Normally it converts receivables into cash without changing total current assets. It improves cash availability even though net working capital can stay unchanged.

Does paying a current payable change net working capital?

A cash payment reduces both current assets and current liabilities by the same amount, normally leaving net working capital unchanged. Liquidity timing still changes.

Continue learning

Read Cash-Flow Statement to connect working-capital changes with operating cash. Return to Cash Flow Management or the Finance Hub for the broader framework.

Examples are illustrative. Definitions should be applied consistently to your reporting framework.

Working capital management: cash-release example

Hypothetical annual credit sales are $1,095,000 and cost of goods sold is $730,000. With steady activity and a 365-day year, daily sales are $3,000 and daily cost of sales is $2,000.

Starting operating working capital is $135,000 receivables + $120,000 inventory − $60,000 payables = $195,000. The target is $120,000 + $100,000 − $70,000 = $150,000. The $45,000 reduction releases cash once as the business moves to new balance levels; it is not recurring annual profit. Sales and costs are constant. Taxes, discounts, financing costs, write-offs, and other balances are excluded. DPO uses cost of sales as a proxy for purchases; use credit purchases when appropriate and available.

A management action plan

• Credit manager: review aging weekly, resolve disputes, and document payment promises. Monitor overdue balances and bad debts alongside DSO.
• Operations manager: review demand, lead times, and reorder levels weekly. Monitor stockouts and obsolete inventory alongside DIO.
• AP manager: negotiate supplier terms before changing payment timing, evaluate discounts, and retain evidence of agreed terms.
• Finance manager: update the weekly cash forecast, compare actual releases with targets, check minimum cash and borrowing headroom, and document monthly review.

Common management mistakes

Writing off a receivable reduces DSO without collecting cash. Cutting inventory too deeply can reduce service levels. Paying suppliers late can create penalties or supply interruptions. Use monthly averages and seasonal forecasts rather than relying only on a year-end balance. Judge cash improvements alongside margins, customer retention, and operating resilience.

Continue with Accounts Receivable Aging, Accounts Payable Aging, and Cash Conversion Cycle.

Further reading: ACCA: Working capital management. The example above is an original illustration, not an industry benchmark.