What is DSO?
Days sales outstanding is the average number of days customers take to pay. It is what you are owed divided by your credit sales, times the days in the period.

Upload monthly figures or an invoice history to see the trend, or type two numbers for a quick answer.
Days sales outstanding month by month, how much you collect, and the cash held up by slow payers. You need what you are owed and your credit sales. Drop it in and the answer appears in your browser with no account, no setup and nothing uploaded. Download the result as a PDF report or an Excel workbook to send on.
Upload monthly sales and amounts owed, or an invoice history with paid dates, to see how many days customers take to pay and how that is changing. You can also type two numbers for a quick answer.