Average Collection Period Calculator

Find the average number of days it takes to collect payment on credit sales from your average accounts receivable, net credit sales, and the length of the period.

Quick Facts

Formula
ACP = (Average AR / Net Credit Sales) x Days in Period
Equal to Days in Period divided by the receivables turnover ratio. A lower period means faster cash collection.

Your Results

Calculated
Average collection period
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Avg days to collect receivables
Receivables turnover
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Times AR is collected per period
Average daily credit sales
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Net credit sales / days in period
Versus credit terms
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Collection period vs your net terms

Ready

Enter average receivables, net credit sales, and the period length, then press Calculate.

What this calculator does

The average collection period (also called days sales outstanding, or DSO) measures how long, on average, a business waits to collect cash after making a sale on credit. This tool applies the standard accounting formula: it divides your average accounts receivable by net credit sales for the period, then multiplies by the number of days in that period. The result is a number of days, and lower generally means you are turning credit sales into cash faster.

The formula

The calculation is:

  • Average collection period = (Average accounts receivable / Net credit sales) × Days in the period.
  • Because receivables turnover = Net credit sales / Average accounts receivable, the period is equivalently Days in the period / Receivables turnover. Both give the same answer.
  • Average daily credit sales = Net credit sales / Days in the period, so the period can also be read as Average accounts receivable / Average daily credit sales.

Use figures from the same window: if net credit sales cover a full year, use 365 days and the average receivables balance over that year. For a quarter use roughly 90 days, and for a month use about 30. Net credit sales should exclude cash sales, returns, and allowances, since only credit sales create receivables to collect.

A worked example

Suppose average accounts receivable is $50,000 and net credit sales for the year are $600,000. Receivables turnover is 600,000 / 50,000 = 12 times per year, so the average collection period is 365 / 12 ≈ 30.4 days. If the business sells on Net 30 terms, collecting in about 30 days means customers are paying close to schedule.

Interpreting the output

Compare the period to your credit terms. A collection period at or below your net terms suggests customers pay on time and cash flow is healthy. A period running well above your terms points to slow-paying customers, looser enforcement, or accounts that may need follow-up. A very low period is usually good, but if it reflects unusually strict terms it can also signal that tight credit policy is holding back sales. Track the trend over several periods rather than reading a single number in isolation.

Frequently Asked Questions

What is the average collection period formula?
Average collection period = (average accounts receivable / net credit sales) × days in the period. It is mathematically identical to dividing the days in the period by the receivables turnover ratio, since receivables turnover equals net credit sales divided by average accounts receivable. The result is the average number of days a business waits to collect payment on its credit sales.
What is a good average collection period?
A good average collection period is at or below your stated credit terms. If you sell on Net 30, a collection period near 30 days means customers pay on schedule. A period well above your terms signals slow-paying customers and tighter cash flow, while a very short period may mean strict terms that could be limiting sales.
How is average accounts receivable calculated?
Average accounts receivable is usually the beginning balance plus the ending balance divided by two, measured over the same period as net credit sales. For a quick snapshot you can use a single period-end receivables balance, but the two-point average smooths out seasonal swings in the balance.

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