Cash conversion cycle
The cash conversion cycle (CCC) is the number of days it takes for cash spent on inventory to come back as cash from customers, calculated as days inventory outstanding plus days sales outstanding minus days payables outstanding. Ecommerce operators use it to measure how long cash is locked up in each sales cycle and how much growth must be financed.
| Term | What it covers |
|---|---|
| Days inventory outstanding (DIO) | Average days stock sits on the shelf before it sells. |
| Days sales outstanding (DSO) | Average days between the sale and cash actually landing - card, marketplace, BNPL or wholesale terms. |
| Days payables outstanding (DPO) | Average days you take to pay your suppliers. |
| Cash conversion cycle | DIO + DSO − DPO. Lower is better; negative means customers pay you before you pay suppliers. |
DIO and DPO are measured on cost of goods; DSO is measured on revenue. Mixing the bases is the most common way the number comes out wrong.
Worked example
Example numbers. Cash is tied up 40 days per cycle; doubling supplier terms to net-60 cuts that to 10 without touching a single sale.
What is a good cash conversion cycle?
Lower is better and negative is excellent, but there is no universal target - the "right" number is set by your model, not a benchmark. A marketplace seller paid within days who runs net-60 with suppliers can post a negative cycle, funding growth on other people's cash. A brand holding seasonal or slow-moving stock will always carry a long DIO and a longer cycle, and that is not a failure, it is the category. The useful comparison is against your own trend and your growth rate: is the cycle short enough that expansion self-funds, or does every extra dollar of sales pull more cash out than it puts in? Judge it on whether the cash comes back fast enough to grow without external financing, not on the raw day count.
Cash conversion cycle vs related metrics
| Metric | What it measures | How it differs from the cash conversion cycle |
|---|---|---|
| Working capital | The dollars tied up in operations right now. | The same idea in money; the cash conversion cycle expresses it in days. |
| Inventory turnover | How many times stock sells per year. | Drives DIO directly - faster turnover shortens the inventory leg of the cycle. |
| Days of cover | How long current stock will last at recent demand. | The forward-looking cousin of DIO, planning stock rather than measuring how long it sat. |
| CAC payback | Time to recover a customer's acquisition cost. | Both are "time to get your cash back" metrics - one on inventory, the other on marketing spend. |
Common mistakes
- Mixing the bases. Using revenue for one leg and cost of goods for another distorts the result; DIO and DPO run on COGS, DSO on revenue.
- Assuming cards settle instantly. Ignoring DSO on stores where marketplaces and BNPL lag the sale hides real cash that is stuck in transit.
- Averaging across unlike SKUs. A single blended cycle can bury a long-tail product that is quietly a cash trap inside a healthy-looking number.
- Stretching suppliers too far. Chasing a shorter cycle by delaying payment can cost you terms, pricing or the relationship - a false economy.
- Treating a negative cycle as free money. It is a financing structure built on supplier and customer timing, and it can reverse the moment either changes.
Cash conversion cycle FAQ
Related
Blufire S11 Planning & Forecasting projects how the cash conversion cycle stretches as you scale, built on the inventory, receivable and payable balances reconciled to the dollar on The Math.
Updated July 2026