The formula is Net Credit Sales divided by Average Accounts Receivable. A business with $1.2M in annual credit sales and an average AR balance of $150,000 has an AR turnover of 8, meaning it collects its AR 8 times a year. Dividing 365 by the turnover ratio gives the average collection period: 365 / 8 = 45.6 days. This is equivalent to DSO and tells you on average how long invoices take to be paid.

AR turnover is most useful as a trend metric. A ratio that was 10 last year and is now 7 this year means the business is taking longer to collect (the average collection period grew from 36.5 to 52 days). That deterioration may signal increased customer delinquency, looser credit terms, or less follow-up. Benchmarking against industry norms tells you whether your performance is typical or whether you have a collections problem specific to your business.

Small service businesses often calculate AR turnover informally or not at all. But the underlying question (how quickly is cash coming in relative to sales) is fundamental to cash flow management. A business with strong revenue but low AR turnover may be heading for a working capital crunch: earning on paper, not collecting in practice. Improving AR turnover by 2-3 days through better follow-up directly reduces the cash conversion cycle and reduces reliance on credit facilities.