Working capital explained: inventory, receivables and payables
Working capital connects day-to-day trading with cash needs. Inventory on shelves and unpaid customer invoices can tie up money even when the income statement shows a profit.
Start by stating the definition
A broad accounting definition is current assets minus current liabilities. For operating analysis, analysts often use inventory plus trade receivables minus trade payables, excluding cash and financing debt. Definitions vary: state the accounts included before comparing companies or building a valuation.
A fictional retailer
Harbour Retail has £20,000 of inventory, £12,000 of trade receivables and £9,000 of trade payables. Using the operating definition, working capital is £20,000 + £12,000 − £9,000 = £23,000.
Next month, inventory rises to £26,000, receivables rise to £15,000 and payables rise to £11,000. Operating working capital becomes £30,000. The £7,000 increase absorbs cash in a simplified cash-flow bridge, holding other items constant. Sales growth may be encouraging while still requiring funding for stock and customer credit.
What each balance tells you
- Inventory is stock held for sale or use. More stock can support demand but also creates storage and obsolescence risk.
- Receivables are amounts owed by customers. A higher balance may reflect growth, slower payment or collection problems.
- Payables are amounts owed to suppliers. Later payment may preserve cash temporarily while affecting supplier relationships and terms.
Test the forecast rather than guessing
Ask whether balances are seasonal, whether old invoices are collectable and whether supplier terms will continue. Compare balances with trading activity over the same period. A year-end snapshot alone can hide a peak funding requirement in the middle of the year.
In a simplified model, reducing next month's inventory by £3,000 lowers the increase in operating working capital from £7,000 to £4,000. That releases £3,000 relative to the original forecast, but stockouts could reduce sales. It is a scenario, not a guaranteed improvement.
Connect it to valuation
A cash-flow forecast should account for investment in operating working capital alongside operating earnings, taxes and capital spending. Avoid subtracting the whole working-capital balance every year: it is usually the change that matters in the cash-flow bridge. Keep signs and definitions consistent.
Continue with profit versus cash flow, discounted cash flow or the Company Builder simulation.
Accounting reference: IFRS Foundation: IAS 7 cash-flow classification. Explore all finance guides →