TL;DR: Working capital equals current assets minus current liabilities. Illustrative example only: a business has current assets of $480,000, made of $90,000 cash plus $140,000 receivables plus $210,000 inventory plus $40,000 prepayments, and current liabilities of $320,000, made of $180,000 payables plus $60,000 accrued costs plus $80,000 short term debt. Its working capital is $160,000, since $480,000 minus $320,000 equals $160,000, and its current ratio is 1.5, since $480,000 divided by $320,000 equals 1.5.
Key Takeaways
- The worked example in this draft is fully illustrative. Its arithmetic is recorded in Sources and method below and was recomputed for this draft.
- Definitions here follow standard filing usage. Where providers or filings use a different definition, the draft says so and tells you to check which one a source is using.
- This is educational information, not financial advice, and it is not a recommendation to buy, sell, or hold any security or fund.
Build the example from the balance sheet
All figures in this section are illustrative. Current assets are assets expected to turn into cash or be used within a year, or within the business normal operating cycle when that cycle runs longer than a year. In the example they total $480,000: $90,000 plus $140,000 plus $210,000 plus $40,000 equals $480,000. Current liabilities are obligations due within a year, on the same operating cycle convention. They total $320,000: $180,000 plus $60,000 plus $80,000 equals $320,000. Subtract the second from the first and working capital is $160,000. The layout of both sections is shown in how to read a balance sheet.
The same two totals give the current ratio, covered in depth in current ratio and quick ratio explained. Here the ratio is 1.5. Working capital states the cushion in money. The ratio states it relative to the size of the short term obligations. Both describe the same position from different angles.
Why too little and too much both matter
Negative working capital means short term obligations exceed the resources due to meet them. Very thin positive working capital still shows a surplus, just a small one. Some businesses, notably retailers paid immediately by customers while paying suppliers later, run thin or negative working capital safely as a model. For most companies, though, persistent thin working capital means any sales dip or late paying customer becomes a cash problem quickly, regardless of reported profit. Profit is not cash, and working capital is where that difference becomes visible.
Excess working capital has a quieter cost. Money sitting in slow moving inventory or in receivables that customers are allowed to stretch is money not earning a return elsewhere in the business. Watching working capital as a share of sales over time is often more informative than the single figure. If sales grow by a tenth and receivables grow by a third, collections discipline, not demand, is the story.
Changes in working capital and cash flow
When operating working capital rises, cash has usually been absorbed into the business, and when it falls, cash has usually been released. Read that rule on the operating items, receivables, inventory, and payables, rather than on the total figure: the total includes cash itself and short term debt; cash is the balance being explained, while borrowing and repayment are financing flows, and noncash movements can move the balances without moving cash. That is why changes in receivables, inventory, and payables appear in the operating section of the cash flow statement, and why a profitable, fast growing business can still run out of cash. New investors often meet this first as a puzzle: profit up, bank balance down. Working capital growth is usually the answer. The same trap expressed as time rather than money is the cash conversion cycle explained.
For screening, pair this concept with profit margins explained. Margins show how much profit each sale carries. Working capital shows how much cash each unit of growth consumes while producing it.
This article is educational information, not financial advice. Prices, company figures, and fund figures in the worked example are illustrative and are not figures for any real security, company, or fund.
Sources and method
- Target keyword: "working capital explained" from .saeo/keywords.yaml (queue entry added 2026-10-31). No search volume or difficulty figure is claimed; both are recorded as unknown in the queue entry.
- All figures are labelled illustrative examples. Arithmetic verified for this draft on 2026-10-31 by recomputation in Python: 90,000 plus 140,000 plus 210,000 plus 40,000 equals 480,000; 180,000 plus 60,000 plus 80,000 equals 320,000; 480,000 minus 320,000 equals 160,000; 480,000 divided by 320,000 equals 1.5.
- Internal links checked for this publish batch on 2026-11-01 against the live Fullport sitemap plus this batch: cash-conversion-cycle-explained, how-to-read-a-balance-sheet.
- Distinction check: Current ratio content exists as a ratio. No explainer covered working capital itself as a money amount and a cash flow driver.
