Financial Glossary
Days Sales Outstanding (DSO)
Days Sales Outstanding (DSO) measures the average number of days a company takes to collect cash after recognizing revenue from a sale. It is calculated as Accounts Receivable divided by Average Daily Revenue (where Average Daily Revenue equals total revenue divided by the number of days in the period). DSO is a key working-capital efficiency metric: lower DSO means faster cash conversion, while rising DSO can signal collection problems, deteriorating customer creditworthiness, or billing process failures. It is most meaningful in businesses that invoice customers on net terms rather than collecting payment at the point of sale.
Problem & Application
A SaaS company invoicing enterprise clients on net-30 terms reports $900K in accounts receivable on $6M in annual revenue. Average daily revenue is $6M divided by 365, or about $16,440. DSO equals $900K divided by $16,440, or roughly 55 days. That is 25 days beyond the stated net-30 terms, meaning customers are paying late on average. To calculate the cash impact: if DSO were brought down from 55 to 35 days, the company would free approximately $330K in working capital (20 days times $16,440 per day). Practical levers include automating invoice reminders, offering a small early-payment discount, requiring credit card payment for accounts under a revenue threshold, or escalating past-due accounts sooner. For subscription businesses that collect monthly in advance, DSO is near zero; the metric matters most for professional services, B2B software with annual invoicing, or any operator extending credit terms to other businesses.
In Short
Lowering DSO improves cash flow and financial stability. Businesses should streamline collections and enforce payment terms.