The cash conversion cycle explained

2 min read

CCC = DIO + DSO − DPOThe formula, in days

Days of cashWhat it measures

Lower is betterShorter cycle frees cash

What the cash conversion cycle is

The cash conversion cycle (CCC) is the number of days between paying cash out for stock or materials and getting cash back in from customers. It is the operating engine of your working capital: the longer the cycle, the more cash is locked up just to keep trading at the same level. It combines three sub-measures — how long stock sits before it sells, how long customers take to pay, and how long you take to pay suppliers.

The three components

The CCC is built from three figures, each measured in days:

DIO — days inventory outstanding. How long stock sits before it is sold. Calculated as (average inventory ÷ cost of goods sold) × 365.
DSO — days sales outstanding. How long customers take to pay. (Average receivables ÷ credit sales) × 365.
DPO — days payable outstanding. How long you take to pay suppliers. (Average payables ÷ cost of goods sold) × 365.

The formula is CCC = DIO + DSO − DPO. You add the time cash is tied up in stock and unpaid invoices, then subtract the time your suppliers effectively fund you by waiting for payment.

A worked example

Take a wholesaler. Stock turns over in 50 days (DIO = 50). Customers pay on roughly 45-day terms (DSO = 45). Suppliers are paid in 30 days (DPO = 30). The cycle is 50 + 45 − 30 = 65 days. That means cash is tied up for over two months on every cycle of trade. If the business does £1m of cost of goods a year, each extra day of cycle ties up roughly £2,700 of cash — so shaving 10 days off frees about £27,000 without borrowing a penny. Equally, winning a big order that scales all three figures up can open a cash gap the business cannot fund from its own resources.

Shortening the cycle, or bridging it

There are two levers. Shorten the cycle by selling stock faster, invoicing promptly and tightening collections to cut DSO (see how to forecast cash flow), or by negotiating longer supplier terms to raise DPO. Or bridge the gap with finance when the cycle is structurally long or growth has stretched it. A revolving facility or working capital finance is sized to exactly this gap — drawn while cash is tied up, repaid as customers pay. Model your own cycle with the cash conversion cycle calculator. This guide is educational, not financial advice.

Frequently asked questions

Can the cash conversion cycle be negative?

Yes — and it is a strong position. A negative CCC means you collect from customers before you have to pay suppliers, so they effectively fund your trading. Some large retailers and subscription businesses run this way. For most SMEs the cycle is positive, which is why working-capital finance exists.

How is the CCC different from working capital?

Working capital is a pounds figure — current assets minus current liabilities. The cash conversion cycle expresses the same tension in days, showing how long cash is locked up in the operating cycle. The CCC tells you why your working capital is tied up; the working-capital figure tells you how much.

Which part of the cycle is easiest to improve?

Usually DSO, because tightening invoicing and credit control is within your control and needs no supplier negotiation. Cutting DIO depends on demand and supply chains; raising DPO depends on supplier goodwill. Shortening DSO is the fastest route to freeing cash.