Definition
Working capital is the difference between current assets and current liabilities on the balance sheet: cash, accounts receivable, inventory, and prepayments minus accounts payable, accruals, deferred revenue, and short-term debt. It represents the short-term operating liquidity of the business and the cash tied up in the normal operating cycle. A growing business almost always needs growing working capital to fund receivables and inventory ahead of customer payments.
What working capital means in practice
For a bookkeeper, working capital is one of the simplest balance-sheet diagnostics. A monthly review of the working-capital line catches the most common operational stress patterns. Receivables that are growing faster than revenue mean customers are taking longer to pay (a collection problem or a credit policy issue). Inventory that is growing faster than sales means stock is building up (a demand problem or a buying mistake). Payables that are growing faster than expenses mean the business is stretching suppliers (a cash-flow problem masquerading as growth).
The two most common derived ratios are the current ratio (current assets / current liabilities) and the quick ratio (current assets minus inventory / current liabilities). The current ratio is the standard solvency check; the quick ratio is the conservative version that excludes inventory because inventory can be slow to convert to cash. Both are routinely covenanted in SMB lending.
A practical example: a UK consultancy at 31 March 2027. Current assets: 35,000 cash + 28,000 AR + 4,000 prepayments = 67,000. Current liabilities: 8,000 AP + 3,500 accruals + 6,500 VAT payable = 18,000. Working capital: 67,000 - 18,000 = 49,000. Current ratio: 67,000 / 18,000 = 3.72. Quick ratio (no inventory in a service business): same 3.72. The current ratio is high because the business carries surplus cash; many lenders would view this favourably but a finance director might argue some of the cash should be deployed into growth or distributions.
How working capital works by country
United Kingdom
Not a statutory disclosure but routinely covenanted in UK SMB lending. Common covenant: minimum current ratio of 1.25 or 1.5 measured at quarter end. Breach of the covenant typically triggers a notification requirement to the lender and (after a cure period) an event of default. The UK Late Payment of Commercial Debts (Interest) Act 1998 affects working-capital dynamics for businesses dealing with slow-paying customers: the statutory right to charge interest at the Bank of England base rate plus 8% gives suppliers a lever to accelerate AR collection.
Australia
Not a statutory disclosure. ASIC’s solvency test for directors under Corporations Act section 588G implicitly requires positive working capital plus the ability to pay debts as they fall due; directors who continue to trade while insolvent face personal liability. The Payment Times Reporting Scheme has shifted typical working-capital balances for large suppliers (large customers now pay small suppliers faster on average, reducing supplier AR balances).
Canada
Not a statutory disclosure. Common in private-company lending covenants at minimum current ratio of 1.25 or 1.5. The CRA’s general anti-avoidance rule does not address working-capital management directly but transactions structured to manipulate balances near a financial-statement date (window dressing) can attract scrutiny if they distort the picture materially.
New Zealand
Not a statutory disclosure. The Companies Act 1993 section 4 solvency test for distributions requires the company to be able to pay its debts as they fall due, which implicitly requires positive working capital. Directors who authorise a distribution without satisfying the solvency test can be personally liable.
Singapore
Not a statutory disclosure. Section 75 solvency test for share buybacks applies. Singapore’s private-company lending market (dominated by DBS, OCBC, and UOB) routinely covenants minimum current ratios in working-capital facilities, typically at 1.25 or 1.5.
Related terms
Working capital is a balance-sheet metric derived from current assets and liabilities:
- The balance sheet is where working capital is calculated.
- Accounts receivable is the largest current asset for most service businesses.
- Accounts payable is the largest current liability for most service businesses.
- Inventory is the largest current asset for most product businesses.
- The cash flow statement explicitly shows working-capital movements in the operating section.
- Statement of cash flows is the IFRS/ASPE name for the same statement.
See also
For the cash flow statement that explicitly reports working-capital movements, see the cash flow statement entry.
FAQ
See the answered questions above for the current ratio, the working-capital-to-cash relationship, and the cash flow impact.