A business can be profitable on paper and still run out of cash. The gap between those two facts almost always comes down to the cash conversion cycle — how long money is tied up between paying for inventory and actually collecting cash from a sale.
The Formula
The cash conversion cycle (CCC) is calculated as CCC = DIO + DSO — DPO. Each piece measures a different stage of the cycle: Days Inventory Outstanding (DIO) is how long inventory sits before it sells, calculated as average inventory divided by cost of goods sold, times 365. Days Sales Outstanding (DSO) is how long it takes to collect cash after a sale, calculated as average accounts receivable divided by revenue, times 365. Days Payable Outstanding (DPO) is how long you take to pay your own suppliers, calculated as average accounts payable divided by cost of goods sold, times 365.
Why It Matters More Than the P&L
A shorter CCC means less of your own cash is tied up funding the gap between paying suppliers and getting paid by customers, which directly reduces how much you need to borrow and how much cash cushion you need to hold. A longer CCC means you’re effectively financing your customers and your inventory out of pocket, even on sales that show up as profitable on the income statement.
Typical Benchmarks
Most direct-to-consumer e-commerce brands run a CCC of 60 to 120 days, Amazon marketplace sellers typically run 30 to 90 days, general retail averages 60 to 90 days, and tech/service businesses with little inventory average 35 to 55 days. If your CCC is meaningfully longer than your industry’s typical range, that’s usually the real reason a growing, profitable business still feels cash-starved.
How to Actually Shorten It
Three levers, each mapping to one part of the formula: sell through inventory faster (lower DIO) by trimming slow-moving SKUs and improving demand forecasting, collect from customers faster (lower DSO) by tightening invoice terms and following up sooner on late payments, and negotiate longer payment terms with your own suppliers (raise DPO) without damaging the relationship. This is the same underlying tension covered in negotiating payment terms as a freelancer, just measured at the level of a whole inventory-based business rather than a single invoice.
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