The cash conversion cycle (CCC) equals days inventory outstanding (DIO) plus days sales outstanding (DSO) minus days payables outstanding (DPO). It measures how many days cash is tied up between paying for inventory and collecting from customers. The numbers below are illustrative. They are not a real company. The formula is an accounting identity, so no statistical release is cited.
The CCC formula
CCC = DIO + DSO − DPO.
A shorter cycle means less cash is sitting in inventory and unpaid invoices, after you give yourself credit for the time suppliers give you. The turnover ratio is a different formula. It is not restated here. Use accounts receivable turnover for that ratio, and this page for the three-part cycle.
The three parts
Days inventory outstanding
DIO = (average inventory ÷ cost of goods sold) × days in the period. It is how long inventory sits before it is sold.
Days sales outstanding
DSO = (average accounts receivable ÷ net credit sales) × days in the period. It is how long customers take to pay. The definition and the naming are on days sales outstanding. The same day count, under the collection-period name, is on the average collection period page.
Days payables outstanding
DPO = (average accounts payable ÷ cost of goods sold, or purchases) × days in the period. Use the same cost base your own worksheet already uses, and do not mix two bases in one cycle. It is how long the business waits before paying suppliers.
Worked example
These three day counts are made up so the subtraction is easy to see. They are not a filing.
| Part | Days |
|---|---|
| DIO | 30 |
| DSO | 40 |
| DPO | 25 |
| CCC | 30 + 40 − 25 = 45 days |
In a spreadsheet, with DIO in B1, DSO in B2, and DPO in B3, the cycle is =B1+B2-B3.
What is a good CCC, and can it be negative?
There is no universal good number. A lower cycle generally means less cash is tied up. Context still matters: a very low cycle can mean inventories are too thin or suppliers are being pushed past the terms you agreed.
The cycle can be negative. That happens when DPO is larger than DIO plus DSO, so the business collects from customers before it pays suppliers. A negative result is a description of the arithmetic, not a claim that any named company has one. This page does not cite a 10-K.
CCC, operating cycle, and working capital cycle
| Name | What it adds |
|---|---|
| Operating cycle | DIO + DSO. It stops at collection. It does not subtract payables. |
| Cash conversion cycle | DIO + DSO − DPO. It subtracts the time suppliers finance you. |
| Working capital cycle | A looser name for the same cash loop. When someone uses it, ask whether they subtracted DPO. |
How to shorten the cycle
- Inventory: buy and make closer to the sale, so DIO falls.
- Collections: invoice sooner and resolve disputes, so DSO falls. The credit steps are credit control. A collections-side note on DSO is DSO reduction.
- Payables: take the terms suppliers offered. Stretching past those terms is a different decision from using the terms you have.
Using the same illustration, change only DPO from 25 to 80. The cycle becomes 30 + 40 − 80 = −10 days. That second line is still illustrative. It shows the arithmetic of a negative cycle: suppliers are financing the business longer than inventory and receivables tie cash up. It is not a claim about a named firm.
DIO falls when inventory moves faster, and it rises when goods sit. DSO falls when customers pay sooner, and it rises when invoices wait. DPO rises when you take the full supplier term, and it falls when you pay early. The cycle is the sum of those choices. Shortening it is three separate jobs, not one slogan.
Do not mix this page with the turnover page. Turnover counts how many times receivables turned. The cycle counts days across inventory, receivables, and payables. A fast turnover can sit inside a long cycle if inventory is slow. A short cycle can sit next to a weak turnover if payables are doing the work. Read the page that matches the question.
A spreadsheet for the cycle needs three day counts you computed yourself, not three day counts copied from this illustration. Label the column. If DIO, DSO, and DPO use different period lengths, the total is not a cash conversion cycle. Match the days first.
What the cycle tells you is the gap between paying and collecting, measured in days. It does not tell you whether a customer will pay, whether inventory is obsolete, or whether a supplier will extend the same terms next year. Those questions need the aging report, the inventory records, and the supplier contract. Use the cycle as the summary, then open the part that moved.
Excel is the same addition as the formula. Put DIO, DSO, and DPO in three cells and subtract. Do not paste the illustrative 30, 40, and 25 into a live workbook and call it your cycle.
A service business with no inventory can still track a shorter loop: collection days minus payable days. That is not the full cash conversion cycle in the formula above, because DIO is missing. Say so when you report it. Do not label a two-part result as the three-part cycle.
Negative, low, and high are descriptions of the arithmetic. They are not grades. A negative cycle can be a strong cash position or a sign that suppliers are being stretched. Look at the contract terms before you praise the number. If you cite a public company, cite its filing and the period of that filing. This page does not name one.
Inventory days, collection days, and payable days are the whole formula. Dropping one of them, or borrowing a day count from a different year, is a different metric. Label it as that other metric. The illustrative 45-day result and the illustrative negative result use the same inventory and collection days on purpose, so you can see that only the payable days changed.
Industry data for this kind of metric is grouped under industry, data, and technology.
FAQ
What is the cash conversion cycle formula?
Days inventory outstanding plus days sales outstanding minus days payables outstanding.Can the cash conversion cycle be negative?
Yes. It is negative when days payables are larger than inventory days plus collection days, so customers pay you before you pay suppliers.Is a lower cash conversion cycle better?
It generally means less cash is tied up. A very low cycle can also mean inventory is thin or supplier terms are being missed. Read it in context.What is the difference between the CCC and the operating cycle?
The operating cycle is inventory days plus collection days. The cash conversion cycle subtracts days payables.How can I shorten the cash conversion cycle?
Turn inventory faster, collect sooner, and use the supplier terms you already have.Sources
The formula on this page is an accounting identity. No statute or statistical release is cited, because none is used. The example day counts are illustrative. Accessed October 26, 2026, as the date of this page.