DSO DPO stands for Days Sales Outstanding (DSO) and Days Payable Outstanding (DPO). DSO is a measure of how quickly a company collects on its accounts receivable, while DPO measures the speed at which a company pays its suppliers. In essence, these two metrics provide an indication of a company’s ability to manage its cash flow, as well as the strength of its relationships with customers and suppliers. Together, they can help business owners make informed decisions about their operational efficiency and financial health.