Accounting
Liquidity & Working Capital
Whether a business has enough readily available assets to cover what it owes soon — a different question from whether it's profitable, answered by comparing current assets to current liabilities.
Definition
Working capitalis the difference between a business's current assets (cash, and anything expected to convert to cash or be used up within about a year) and its current liabilities (anything due within about a year): Working Capital = Current Assets − Current Liabilities. A positive number means a business has more short-term resources than short-term obligations; a negative number means the reverse.
The current ratio and quick ratio ask the same underlying question in relative rather than absolute terms — how many dollars of current assets exist for every dollar of current liabilities — so businesses of different sizes can be compared on equal footing.
Why this exists
Per The Balance Sheet, assets and liabilities are grouped into current (due or convertible to cash within about a year) and long-term categories, specifically because how soon something turns into cash or comes due matters enormously to a business's near-term health. A business could easily be profitable, and even have substantial total assets, while still being unable to pay a bill due next week — if most of its value is tied up in a factory, a building, or long-term investments that can't quickly be turned into cash, none of that helps cover an invoice due tomorrow.
Working capital isolates exactly the resources and obligations that matter for that near-term question, by comparing only the current, short-term portions of the balance sheet against each other. A business with positive working capital has more short-term resources on hand than short-term obligations coming due — a cushion. A business with negative working capital has more coming due soon than it currently has readily available, a warning sign worth investigating even if the business's overall balance sheet, and even its income statement, look fine.
The current ratio and quick ratio refine this into a comparable number rather than a raw dollar figure — the same reason Profit Margins convert profit into a percentage instead of comparing raw dollars: dividing lets you compare businesses of very different sizes, or the same business at different points in time. The quick ratio goes one step further than the current ratio by excluding inventory from current assets, on the theory that inventory can take real time to actually sell and convert to cash, making it a less reliable source of near-term liquidity than cash or amounts already owed to the business by customers.
Formula & mechanics
Working Capital = Current Assets − Current Liabilities Current Ratio = Current Assets / Current Liabilities Quick Ratio = (Current Assets − Inventory) / Current Liabilities
Worked example
Continuing Maria's bakery from The Balance Sheet: Cash $8,000, Inventory $2,000, and suppose $1,000 of the remaining bank loan is due within the year (the rest is longer-term).
Current assets: $8,000 cash + $2,000 inventory = $10,000 Current liabilities: $1,000 (current portion of the loan) Working capital: $10,000 − $1,000 = $9,000 Current ratio: $10,000 / $1,000 = 10.0 Quick ratio: ($10,000 − $2,000) / $1,000 = 8.0
Maria's bakery has a substantial short-term cushion — $10 of current assets for every $1 of current liabilities due soon, even after setting inventory aside.
Common misconceptions
“A higher current ratio is always better.”
A very high current ratio can also mean a business is sitting on too much idle cash or slow-moving inventory instead of investing it productively — there's such a thing as excessive, inefficient liquidity, not just insufficient liquidity.
“Negative working capital always means a business is in trouble.”
Some business models — ones that collect cash from customers before paying suppliers, like many retailers or subscription businesses — can operate successfully with negative working capital as a normal, structural feature, not automatically a red flag.
“Working capital and profit are the same thing.”
Working capital is a balance-sheet snapshot of short-term resources versus short-term obligations at one moment; profit is an income-statement measure of what a business earned over a period. A business can be profitable and still have poor working capital, or vice versa.
Also in the Glossary: Current Ratio, Quick Ratio, Working Capital