Definition
The cash conversion cycle equals days inventory outstanding plus days sales outstanding minus days payable outstanding. It measures the gap between paying suppliers and collecting from customers. A shorter cycle means less cash is locked in working capital. A negative cycle means customers pay before suppliers do, which is common in some retail and subscription models.
Why it matters in an audit or review
The cycle combines three accounts that each carry audit risk: receivables, inventory and payables. A lengthening cycle can reflect slow collections, build-up of stock or stretching of suppliers, and that last one can point to unrecorded liabilities or liquidity pressure. A sudden shortening can reflect cutoff errors that pull cash or payables across the year-end.
Example
Illustrative: days inventory outstanding of 91, days sales outstanding of 45 and days payable outstanding of 38 give a cycle of 91 + 45 - 38 = 98 days. If payables days fall to 28 because suppliers tightened terms, the cycle lengthens to 108 days and more financing is needed.
Common mistakes
- Computing each component on a different base, such as sales for payables instead of cost of goods sold or purchases.
- Mixing year-end and average balances across the three components.
Sources
- AICPA, AU-C Section 520, Analytical Procedures
- AICPA, AU-C Section 315, Understanding the Entity and Its Environment (including analysis of financial performance)
Definitions paraphrase AICPA and FASB guidance; read the standard itself before relying on a requirement. Example figures are illustrative. This page is guidance, not professional advice. Report an error