Days payable outstanding (DPO) is the average time for a company to pay its bills. By contrast, days sales outstanding (DSO) is the average length of time for sales to be paid back to the company. When a DSO is high, it indicates that the company is waiting extended periods to collect money for products that it sold on credit. By contrast, a high DPO could be interpreted multiple ways, either indicating that the company is utilizing its cash on hand to create more working capital, or indicating poor management of free cash flow.