Why days sales outstanding (DSO) matters to a first-time founder
Days sales outstanding, or DSO, estimates how long a business takes to collect credit sales. Rising DSO can warn that customers are paying later, invoices are disputed, or collection has weakened. Lower is not automatically better if generous terms win good customers. Compare the figure with promised terms, overdue balances, seasonality, customer mix, and cash needs.
Examples of days sales outstanding (DSO)
A consultancy has average trade receivables of ₹7.5 million and ₹60 million of annual credit sales. DSO is ₹7.5 million divided by ₹60 million, multiplied by 365, which is about 46 days. If contracts require payment within 30 days, the result warrants an invoice-by-invoice review. One ₹4 million disputed bill may explain more than the company-wide average.
Common misunderstanding
DSO is an average, not the age of every invoice and not the same as payment terms. The usual formula is average trade receivables divided by credit sales, multiplied by days in the period. Using total sales when many customers pay immediately can distort the result. Exclude tax and non-trade balances consistently, and state whether the calculation uses 365 days.
When to use it
Track DSO when credit sales are material or cash collection is slowing. Calculate it consistently each month, then pair it with an aged receivables report and reasons for disputes. Improve invoicing accuracy and follow-up before tightening terms blindly. If there are only a few invoices, manage each due date directly; the average can move sharply without revealing a repeatable trend.