The Cash Conversion Cycle (CCC) estimates the days between paying for inventory and collecting the related customer cash. It combines inventory time and customer collection time, then subtracts the time suppliers allow before payment.

Cash Conversion Cycle = DSO + DIO − DPO

The result is in days. It describes operating cash timing, not profit or the company’s entire cash position. Service businesses without inventory may use only the relevant collection and payment components.

Days Sales Outstanding (DSO)

DSO estimates how long customer balances remain uncollected. A common calculation is average trade receivables ÷ credit revenue for the period × days in the period. State whether total revenue substitutes for credit revenue and whether the balance is an average or a closing snapshot.

A 60-day result is an estimate based on those amounts. It does not establish that every invoice is 60 days old. Use receivables aging to see the actual overdue accounts.

Days Inventory Outstanding (DIO)

DIO estimates how long inventory is held before sale. A common calculation is average inventory ÷ cost of goods sold for the period × days in the period. Review obsolete stock and seasonal buying separately; a summary ratio can hide both.

Days Payable Outstanding (DPO)

DPO estimates the time taken to pay suppliers. A common calculation is average trade payables ÷ credit purchases for the period × days in the period. Cost of goods sold may be used as a declared approximation when suitable purchases data is unavailable. It is not identical to purchases when inventory or the cost mix changes.

These are three separate measures within the cycle. The ACCA working-capital explanation provides the underlying relationship and ratio conventions.

Read the convention used in the model

A planning model may use year-end balances divided by annual revenue or cost of goods, multiplied by 365. That closing-balance approximation differs from an average-balance operating measure. Name the convention, period and included balances before comparing results or targets.

Use a consistent period and basis when comparing results. Missing balances or a zero denominator do not establish a zero-day cycle. A negative cycle can be real when customers pay before suppliers; it still needs source support.

Improve cash timing without counting the benefit twice

For a hypothetical steady business with $3.65 million in annual credit revenue, a ten-day reduction in receivables would release about $100,000, all else equal. This is a balance reduction, not $100,000 of additional recurring annual profit. Growth or seasonality can change the amount.

Quicker collections, appropriate inventory and agreed supplier terms can reduce funding needs. Paying suppliers late or cutting inventory below delivery needs can damage the business. A sale’s working-capital adjustment depends on its agreed definitions and target; a shorter cycle does not guarantee a larger sale payment.

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