Average Collection Period

Updated October 30, 2026. Written by Salman Shawaf, Co-founder, Yonovo.

The average collection period is the average number of days accounts receivable stay unpaid. The formula is (average accounts receivable / net credit sales) x days in the period. When the inputs match, it is the same number as days sales outstanding.

Average collection period formula

(Average accounts receivable / Net credit sales) x Days

The second form uses turnover:

Days in the period / Receivable turnover ratio

Average receivables are the beginning balance plus the ending balance, divided by two. Net credit sales exclude cash sales, because cash sales never become a receivable. Use 365, 90, or 30 to match the period of the sales figure. Days sales outstanding is the name most finance teams use for this day count. Receivable turnover is the rate form of the same math.

Average collection period calculator

The starting numbers match the example. Change them to your ledger.

Average accounts receivable

Beginning balance plus ending balance, divided by two.Net credit sales

Credit sales for the same period. Leave cash sales out.Period

days

365 for a year, 90 for a quarter, 30 for a month.

Average collection period

54.75days

Same inputs, same result as DSO.

Receivable turnover6.67x

Daily credit sales$3,288

Worked example

Illustration only. Average receivables are $180,000. Net credit sales for the year are $1,200,000.

Turnover = 1,200,000 / 180,000 = 6.67 times. The unrounded ratio is 6.666...
Average collection period = 365 / (1,200,000 / 180,000) = 54.75 days. Do not divide 365 by the rounded 6.67. That is 54.7, not 54.75.
The direct form gives the same answer: (180,000 / 1,200,000) x 365 = 54.75 days.

On Net 30 terms, 54.75 days means payment is landing about 25 days late. That is the same worked example as the DSO page, on purpose. If your two reports disagree, the inputs differ. They are not two metrics.

How finance teams use it

Track the period monthly, next to your stated terms. A rising period with flat sales means the book is getting slower. A rising period with a spike in sales can be the new invoices, not a collections failure. Read the aging report before you treat the average as a problem.

The external comparison to use is a DSO benchmark, because the numbers match. The Credit Research Foundation median was 40.12 days in the first quarter of 2026. APQC puts top performers at 30 days or less and bottom performers at 46 days or longer. Shorten the period the same way you shorten DSO: bill on time, remind before the due date, and run the sequence from accounts receivable collections software instead of a spreadsheet. The longer guide is how to reduce DSO.

Frequently asked questions

The average collection period is the average number of days accounts receivable remain outstanding. It tells a finance team how long credit sales take to turn into cash. It is the day count version of the receivable turnover ratio.

Average collection period = (average accounts receivable / net credit sales) x days in the period. The equivalent form is days in the period divided by the receivable turnover ratio. Both return the same number when the inputs match.

Take average receivables, divide by net credit sales for the period, and multiply by the days in the period. With $180,000 of average receivables and $1,200,000 of annual credit sales, the period is (180,000 / 1,200,000) x 365 = 54.75 days.

Yes, when both use the same receivables balance and the same period. Days sales outstanding is the name most controllers use. Average collection period is the name most textbooks use. Do not track them as two different targets.

Shorter than your stated terms is the first test. A Net 30 book with a 55 day collection period is collecting about 25 days late. For an external comparison, the Credit Research Foundation median DSO was 40.12 days in the first quarter of 2026. That median is a DSO figure. It is the right comparison because the two metrics match when the inputs match.