Days sales outstanding (DSO)

Days sales outstanding (DSO) is a financial metric that measures the average number of days a company takes to collect payment after making a credit sale. It indicates how efficiently accounts receivable is managed and how quickly revenue is converted into cash. A lower DSO generally reflects faster collection, while a higher DSO may indicate delayed payments, weak collection practices or unfavorable credit terms. 

The days sales outstanding formula is: 

DSO = (Average accounts receivable ÷ Net credit sales) × Number of days in the period 

For example, if average receivables are $1 million and net credit sales total $6 million over 90 days, the DSO calculation is 15 days. Organizations may calculate DSO monthly, quarterly or annually, depending on reporting requirements and transaction volumes. 

DSO should be interpreted in context because payment terms, customer mix, seasonality and business models can significantly affect results. Comparing DSO across unrelated industries may therefore provide limited insight. Organizations should evaluate performance against historical trends, contractual terms and relevant peer benchmarks. Monitoring DSO can help finance leaders identify collection issues, improve cash flow forecasting and strengthen working capital performance. Improvements may involve clearer invoicing, faster dispute resolution, customer segmentation and greater coordination across sales, finance and customer service.