Working Capital: the cash tied up in growth

Why growth can consume cash

Profit tells you whether income exceeds the costs attributed to a period. Working capital explains why that profit may not yet be available as cash. When work is delivered on credit, the sales value can appear in revenue while the cash is held in receivables. When a product business buys stock ahead of sales, cash is spent before the stock cost reaches the profit and loss account. Those timing gaps grow as activity grows.

The British Business Bank describes working capital as current assets less current liabilities and highlights that a profitable, high-growth company can run out of cash as receivables and inventory increase. The exact level a business needs depends on its cash cycle: how long costs are funded before customer cash arrives. A service firm paid deposits may need relatively little; a retailer buying stock and giving customers terms may need much more.

The objective is not to drive every balance to zero. A business needs enough stock to serve customers, fair supplier relationships and an appropriate buffer. The objective is to understand which balances are absorbing cash, which are temporary, and which are a repeatable operating choice that must be priced and forecast.

The three operating levers

First, reduce debtor days: invoice at the right time, make payment details clear, track due dates and follow a consistent chase process. The aim is not to surprise good customers; it is to stop the business providing indefinite free credit. A shorter collection cycle generally releases cash without requiring more sales.

Second, manage creditor days responsibly. Supplier terms can provide short-term room, but deliberately paying outside agreed terms can damage trust and create a wider problem. Negotiate terms before the purchase where possible, record payment dates in the forecast and communicate early if a dispute or delay arises.

Third, manage inventory and work in progress. Buy to the actual demand and lead time rather than to a hopeful sales target. Stock that cannot be sold or used quickly represents cash that may be unavailable for payroll, tax or a profitable order. For service firms, work in progress and unbilled milestones can play the same role as stock.

Use this page as the cluster gateway

This guide explains why trading can absorb cash and how to choose the next measurement. It is not a replacement for the specialist pages: use Cash Conversion Cycle for the day-based relationship between stock, debtor and creditor timing; Debtor Days and Late Payments for collection performance; Inventory and Cash Flow for stock decisions; and Rolling Cash-Flow Forecast for dated receipts, commitments and the lowest bank balance.

If the business needs to test a delayed customer, weaker sales or an unexpected cost, use Cash-Flow Scenario Planning. If the forecast shows that ordinary operating changes cannot protect payroll, tax or supplier obligations, read the Financial Distress Warning Signs guide and obtain qualified help promptly. This distinction prevents a broad working-capital ratio from becoming false reassurance when the real issue is a dated cash shortfall.

• Need a cycle measure: calculate and interpret cash conversion days.
• Need a collection action: review debtor ageing, due dates and late-payment process.
• Need a stock decision: connect inventory levels, demand and cash release.
• Need a future bank balance: build or update the rolling cash forecast and test scenarios.
• Need urgent support: assess distress indicators before considering new borrowing.

Use a cash-cycle view alongside the balance sheet

A simple current ratio—current assets divided by current liabilities—can be a useful prompt, but it is not a substitute for timing. Receivables that are 90 days overdue or stock that will not sell next month do not meet payroll today. The forecast must show dates: realistic customer-payment dates, supplier due dates, tax dates, payroll and planned purchases.

Each month, make a short bridge from profit to cash. Start with reported profit, then identify changes in receivables, stock or work in progress, supplier balances and non-operating cash movements such as asset purchases or loan repayments. The bridge turns an unexplained bank movement into a set of operating questions.

If the forecast shows that ordinary operating fixes cannot close the gap, diagnose the cause before considering finance. A defined, temporary order-funded gap is different from unprofitable work, overdue tax or a chronic late-payment problem. New borrowing does not make a persistent pricing or collection problem disappear.

What to do, in order

1. 1

   List the balances tied to trading

   Pull aged receivables, stock/work-in-progress and supplier balances, then identify the largest movements since the prior month.

2. 2

   Calculate realistic payment timing

   Use actual customer payment behaviour rather than invoice terms, and put expected receipts in the week they are likely to clear.

3. 3

   Agree one operating action per lever

   Choose a collection action, a supplier-term action and a purchasing or milestone-billing action with an owner and date.

4. 4

   Update the rolling cash forecast

   Show the cash low point after payroll, tax and committed payments; test what changes if a key receipt slips.

5. 5

   Escalate a structural shortfall early

   Seek qualified support if the business cannot meet obligations as they fall due or the gap is not explainable by a short, funded operating cycle.