Working Capital Management

The mechanics rest on timing. Inventory is purchased, held, sold and eventually collected in cash, while suppliers are paid somewhere in between. Days of inventory on hand equals inventory divided by cost of goods sold per day; days of sales outstanding equals receivables divided by revenue per day; days of payables equals payables divided by purchases (or cost of goods sold) per day. The operating cycle is inventory days plus receivable days. Subtracting payable days gives the cash conversion cycle, or net operating cycle: the number of days the firm's own cash is committed before customer receipts arrive.

A long cycle means the firm finances its own operations, and growth consumes cash. A short or negative cycle means suppliers and customers fund the business. Every day removed from the cycle releases capital permanently, which is why the metric is monitored as closely as margin.

Liquidity is not a single number. Primary sources include operating cash flow, trade credit, bank lines and short-term borrowing; secondary sources such as asset sales, renegotiated debt or refinancing usually signal distress because they alter the firm's operating structure. Analysts read the current ratio, quick ratio and cash ratio alongside turnover ratios, since a high current ratio can simply mean stale inventory and slow-paying customers.

Drags on liquidity delay cash inflows: uncollected receivables, obsolete stock, tight credit limits. Pulls accelerate outflows: suppliers shortening terms, early repayment of debt, reduced credit availability. Managing working capital means attacking both sides at once while accepting that overly aggressive collection or minimal inventory can cost sales and supplier goodwill.

Trade credit is the most common and often the most expensive short-term financing. Terms such as a discount for early payment followed by a longer net period embed an implicit interest rate: the cost equals one plus the discount divided by one minus the discount, raised to the power of 365 divided by the number of days payment is stretched beyond the discount date, minus one. Annualised, forgone discounts frequently exceed bank borrowing rates by a wide margin, which is why treasurers compare the two directly.

On the funding side, investment-grade issuers roll commercial paper, backed by committed revolving credit facilities; weaker credits rely on secured bank lines, factoring or asset-based lending. In published statements, working capital shows up in the changes in operating assets and liabilities within cash flow from operations: a widening cycle quietly converts reported profit into inventory and receivables rather than cash.

Expect to compute turnover and days ratios from a balance sheet and income statement, build the cash conversion cycle, and interpret whether a change signals improving efficiency or a deteriorating collection and inventory position. Expect to annualise the cost of forgone trade discounts and rank short-term funding alternatives on an effective-cost basis, including fees on committed lines and compensating balance requirements.

Qualitative judgement matters equally. Candidates should distinguish conservative, moderate and aggressive working capital policies, recognise that the appropriate level depends on industry, seasonality and supply-chain power, and explain why liquidity ratios must be read against turnover data and peer benchmarks rather than in isolation. Linking a lengthening cycle to weaker operating cash flow is the analytical step examiners reward.