The Cash Conversion Cycle

The three components

The cash conversion cycle adds the days stock sits before sale to the days customers take to pay, then subtracts the days the business takes to pay its own suppliers. In plain terms it answers one question: from the moment a client lays out cash for inputs, how many days pass before that cash comes back as a customer payment?

A shorter cycle means the business funds itself; a longer one means it must borrow to bridge the gap. The cycle is powerful for advisers because it combines three separate ledgers into a single number the owner can track over time, and because each component points to a different, concrete action.

Calculating it from the accounts

You can build the cycle from figures you already pull for a client. Days inventory is average stock divided by daily cost of sales; days receivable is average debtors divided by daily sales; days payable is average creditors divided by daily purchases. Add the first two, subtract the third.

The receivables component is the one most amenable to advice, and the easiest to model. The Merion calculator suite converts debtor days into a cash and interest cost, so you can show a client exactly what shaving a week off collection is worth. Tracking the cycle quarterly turns a static ratio into a trend the owner can manage.

A lengthening cycle is a warning

The direction of travel matters more than the absolute number. A cycle that is creeping up — even while sales look healthy — usually means stock is moving slower, customers are paying later, or both. Left unaddressed, the business will need progressively more funding just to stand still.

This is exactly the kind of signal advisers are well placed to catch, because owners rarely notice it themselves until the overdraft is stretched. Pair the cycle with an aged receivables review to see whether the receivables component is the culprit; if days receivable is doing the lengthening, the conversation is about collection, not stock or suppliers. A cycle that has lengthened by a fortnight over two quarters is worth raising with the client even if the bank account still looks comfortable, because the funding gap it implies will surface eventually.

Choosing which lever to pull

Because the cycle is built from three parts, it tells you where to focus. If days receivable is the outlier, the fix is collection discipline, tighter terms or deposits — not heavier discounting or rushed stock orders. If it is days inventory, the conversation is about purchasing and demand, not debtors.

Where the receivables component is inflated by genuinely overdue accounts, recovering them is the fastest way to compress the cycle. A client can refer an aged debt without upfront cost at refer a debt, releasing cash that the cycle shows is stuck. This is general professional information only.