Cash Conversion Cycle
The cash conversion cycle estimates the time between paying for inventory and collecting cash from its sale, using inventory, receivables and payables days.
What is Cash Conversion Cycle?
The cycle connects stock duration with collection and supplier-payment timing. Inventory can remain unsold for weeks, customers or processors can take time to pay, and supplier credit can postpone the store’s own cash payment.
The result is a time measure, not a currency amount. It helps describe how the trading cycle is financed but does not calculate the entire cash buffer the business needs.
Cash conversion cycle = Inventory days + Receivables days − Payables days
Use a common reporting period and consistent average balances. Receivables days normally relate to the relevant credit sales; payables days relate to corresponding purchases. A COGS proxy for purchases should be disclosed.
Supplier terms offset part of the stock cycle
A store has 50 inventory days, 4 receivables days and 30 payables days. Its estimated cash conversion cycle is 24 days. Supplier credit finances part of the combined 54-day inventory-and-collection interval, leaving a modeled 24-day funding gap.
How to interpret it
A shorter cycle can reduce the time operating funds are tied up. Faster stock movement, quicker collection or longer agreed supplier terms can change it, but each has commercial constraints. Extending payments beyond agreed terms is not the same as obtaining better credit terms.
A negative cycle is possible when cash is collected before suppliers are paid. That can support liquidity, but the business still has obligations and may face seasonal or inventory risks. A negative figure does not eliminate the need for cash management.
Online payment capture and bank availability are not always simultaneous. Processor receivables and settlement timing may matter even when customers pay at checkout. The relevant balance should reflect the actual collection mechanism.
The ratio uses averages and can miss the timing of a large deposit or a concentrated purchasing season. It also excludes many cash needs outside the trading cycle, such as equipment, debt principal and fixed-cost reserves.
Common mistakes
Adding payables days
Supplier credit delays the business’s payment, so it shortens the modeled gap and is subtracted.
Using the cycle as a complete cash forecast
A single average duration cannot show which bill falls due on a specific date. Use a dated forecast for that question.
Definition reference: ACCA: working capital and the cash operating cycle.