Cash conversion cycle: inventory to collected cash

The cash conversion cycle describes the time between paying for inventory and collecting from customers, using inventory days plus receivables days minus payables days. It is most meaningful for businesses with comparable inventory, sales and supplier flows. A consultancy with little inventory may need a different operational measure. Define the period and use consistent balances and denominators; changing these between reports can create an apparent improvement that is only a measurement change.

Imagine inventory days of 45, receivables days of 30 and payables days of 20. The modeled cycle is 55 days. If inventory days fall to 35 while the others stay unchanged, the cycle becomes 45 days. This does not mean every customer payment arrives on that schedule. The measure summarizes flows; seasonal purchases, large individual invoices and disputed balances can still produce cash pressure. Review aging reports alongside the aggregate figure.

Inventory improvements might come from reducing slow-moving stock or purchasing closer to confirmed demand. Receivables improvements might come from accurate invoices, clearer acceptance conditions and earlier dispute resolution. Payables should reflect agreed supplier terms rather than simply paying late. Stretching suppliers without agreement can damage reliability or lose discounts. Assign an owner to the specific process causing delay so a finance metric produces an operational change.

Build a weekly calendar of collections, stock purchases and supplier payments before choosing financing. A shorter average cycle can coexist with a large seasonal purchase next week. Test the loss of one major customer’s timely payment and the effect of minimum order quantities. Use the cycle to identify questions, then use dated cash flows to estimate the actual gap. Keep credit facilities, fees and repayment schedules explicit. Neither the ratio nor this example establishes loan eligibility or a recommended borrowing amount.

Bring inventory aging, receivables aging and agreed supplier payment dates. Identify balances that behave differently from the average, including disputed invoices and stock that may not sell. Translate the largest items into next week’s cash plan and assign an action, such as confirming customer acceptance or correcting an invoice. Compare changes in the cycle with changes in sales volume; growth itself can absorb cash. Keep the same calculation method between periods, and explain any change in the basis beside the reported number.