Days' sales in accounts receivable, also called the average collection period, indicates on average how many days of credit sales have not yet been collected, converting the accounts receivable turnover ratio into an intuitive day-count figure. If a company's credit terms are net 30 days, this measure is expected to run at least around 30 days, and a figure meaningfully higher than that signals customers are, on average, taking longer to pay than the terms the company actually offers.
How the measure is calculated
The most common calculation divides 365 by the accounts receivable turnover ratio, or equivalently divides average accounts receivable by net credit sales and multiplies the result by 365, producing a figure expressed in days rather than as a turnover multiple. A company with an accounts receivable turnover of 10 has days' sales in accounts receivable of 36.5 days, meaning its receivables, on average, take roughly 36.5 days to convert into cash.
Comparing the measure against stated credit terms
The most direct use of this figure is comparing it against the company's own stated credit terms: a company offering net 30 terms but showing days' sales in accounts receivable of 55 days has customers paying, on average, nearly double the agreed period, which is a clear sign of collection problems, overly lenient enforcement of terms, or a customer base under financial stress. A figure close to or below the stated terms, by contrast, suggests the company's credit and collections processes are working as intended.
Why the trend matters more than any single figure
Days' sales in accounts receivable is most useful tracked over multiple periods and compared against close industry peers, since a steadily rising figure, even if still reasonably close to stated terms, often signals gradually loosening credit standards or a slowly weakening customer base well before any individual account actually becomes uncollectible. Analysts and lenders watching a company's financial trend treat a sustained increase in this measure as an early warning sign worth investigating, often well before it shows up as a jump in bad debts expense or a deterioration in the company's reported cash flow.
Limitations to keep in mind
This measure uses an average accounts receivable balance and average daily sales, both of which can be distorted by seasonal sales patterns or by a few very large, atypical transactions near the measurement date, so analysts examining a business with significant seasonality often calculate the figure using data from a comparable prior-year period rather than relying purely on a single recent snapshot to avoid drawing a misleading conclusion from a temporary seasonal swing.
A simple worked example
A company with $2 million of average accounts receivable and $20 million of annual net credit sales has days’ sales in accounts receivable of about 36.5 days, found by dividing average receivables by sales and multiplying by 365. If the company offers net 30 terms, that 36.5-day average suggests customers are, overall, paying modestly later than the stated terms, a gap worth monitoring even if it is not yet severe enough to raise serious concern on its own.