Days Sales Outstanding (DSO) Explained for Small Business
DSO is the single best one-number measure of how quickly your invoices turn into cash. Tracking it monthly turns 'we feel like collections is getting worse' into a concrete trend you can act on. It is also the metric most affected by every other tactic in this hub — every Faster Payment improvement shows up as a lower DSO.
How to calculate DSO. DSO = (Accounts Receivable ÷ Total Credit Sales) × Number of Days in the Period.
What is a good DSO?. DSO benchmarks vary by industry, but for small service businesses:
How to lower DSO. Every tactic in the Faster Payment cluster directly reduces DSO. The largest single move is usually shortening default terms (Net 30 → Net 15), followed by adding online payment links and automating reminders. Tracking DSO month over month tells you which changes are actually working.
Frequently asked questions
Is a lower DSO always better?
Almost always — but a DSO of zero is unrealistic and usually means you only take cash up front, which can cost you sales. The goal is the lowest DSO that does not lose you customers.
Does DSO include cash sales?
No — DSO is calculated on credit sales (invoiced sales) only. Cash sales are already collected and do not affect DSO.
