Average Collection Period Calculator
Calculate how many days on average it takes your business to collect payment after a credit sale, a key measure of accounts receivable efficiency.
How to use this tool
- Enter average accounts receivable, net credit sales (annual) and period (days) in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your average collection period and the full breakdown beneath it.
⚠ This tool provides general estimates for education only and is not financial, tax or legal advice. Figures may not reflect your situation — verify with a qualified professional.
Formula
Average Collection Period = (Accounts Receivable / Net Credit Sales) × Days
AR Turnover = Net Credit Sales / Accounts Receivable
How it works
The Average Collection Period (ACP), also known as Days Sales Outstanding (DSO), measures the average number of days a business takes to collect payment after a credit sale. A lower number indicates faster collections and better liquidity.
It is calculated by dividing average accounts receivable by annual net credit sales and multiplying by the number of days in the period. The accounts receivable turnover ratio is the inverse, showing how many times receivables are collected per year.
Worked example
Collection Period for a Wholesale Distributor
- Average accounts receivable balance: $50,000. Annual net credit sales: $365,000.
- ACP = ($50,000 / $365,000) × 365 = 0.13699 × 365 = 50.00 days.
- AR Turnover = $365,000 / $50,000 = 7.30 times per year.
The average collection period is 50.00 days; accounts receivable turns over 7.30 times per year.
Common mistakes to avoid
- Using total sales (cash + credit) instead of net credit sales only, which artificially lowers the calculated collection period.
- Selecting an inconsistent number of days (e.g., 360 for one period and 365 for another) when making year-over-year comparisons.
- Ignoring write-offs: if bad debt is excluded from receivables but not from sales, DSO appears artificially short.
Key terms
- Average Collection Period (ACP)
- The mean number of days a business takes to collect payment from credit customers after a sale, also called Days Sales Outstanding (DSO).
- Accounts Receivable
- Money owed to a business by its customers for goods or services already delivered on credit.
- Net Credit Sales
- Total sales made on credit during the period, minus any returns and allowances; cash sales are excluded.
- AR Turnover Ratio
- The number of times accounts receivable are collected and replaced during a period; a higher ratio indicates faster collections.
Frequently asked questions
- How does average collection period differ from DSO?
- They are the same metric — average collection period and days sales outstanding (DSO) are two names for the same formula: AR divided by average daily credit sales.
- What does a rising average collection period indicate?
- Customers are taking longer to pay. This can signal lenient credit terms, collection problems, or customers under financial stress — all of which increase bad-debt risk.
- Should I compare my collection period to my stated payment terms?
- Yes. If your terms are net-30 and your collection period is 55 days, a significant portion of receivables are past due. Tighter follow-up or stricter credit policies may be warranted.