Accounts receivable turnover ratio is your credit sales for a period divided by your average accounts receivable, and it tells you how many times you collect your debtors in that period. Days sales outstanding (DSO, or "debtor days") turns the same figure into days: DSO = 365 ÷ turnover ratio. A business with $264,000 of credit sales and average receivables of $22,000 has a turnover ratio of 12 and a DSO of about 30 days. A good result is one close to your own payment terms, not an industry average.
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What is the accounts receivable turnover ratio?
The accounts receivable turnover ratio measures how quickly customers pay you. A ratio of 12 over a year means you collected the equivalent of your average receivables balance 12 times, or about once a month. Higher means faster collection; lower means money sits longer in accounts receivable.
It's a scorecard, not a to-do list. It won't tell you which customer to call, but tracked quarter by quarter it shows whether your collections are getting better or worse.
How do you calculate the accounts receivable turnover ratio?
Divide net credit sales by average accounts receivable for the same period. Average receivables is the opening balance plus the closing balance, divided by two.
AR turnover ratio = Net credit sales ÷ Average accounts receivable
Average accounts receivable = (Opening AR + Closing AR) ÷ 2
- Net credit sales are sales you invoiced and let the customer pay later, less credit notes and refunds. Leave out sales paid on the spot by card or cash, because they never sat in receivables.
- Opening and closing AR come straight from your balance sheet or your aged receivables report on the first and last day of the period.
Worked example: a plumbing business over a financial year
A GST-registered plumbing business looks at the 2025–26 financial year (1 July 2025 to 30 June 2026):
- Credit sales invoiced, including GST: $264,000
- Receivables on 1 July 2025: $19,800
- Receivables on 30 June 2026: $24,200
Average receivables = ($19,800 + $24,200) ÷ 2 = $22,000. Turnover ratio = $264,000 ÷ $22,000 = 12.0. DSO = 365 ÷ 12 = 30.4 days.
The business invoices on 14-day terms, so customers are paying about 16 days late on average. That gap, not the ratio itself, is the useful number.
The GST trap: keep both numbers on the same basis
This is the mistake that skews most Australian calculations. Your receivables balance includes GST, because customers owe you the GST-inclusive total. Your profit and loss usually shows sales excluding GST. Mix the two and your ratio is wrong by about 10%.
In the example above, using sales of $240,000 excluding GST against receivables of $22,000 including GST gives a turnover of 10.9 and a DSO of 33.5 days, three days worse than reality. Either use GST-inclusive sales (sales × 1.1 for fully taxable sales) or strip the GST out of receivables (÷ 1.1). If you're not registered for GST, there's nothing to adjust. The GST calculator converts either way.
Accounts receivable turnover and DSO calculator
Enter your credit sales and your receivables at the start and end of the period, on the same GST basis. Change the days if you're measuring a quarter (90, 91 or 92 days) or a month.
What is days sales outstanding (DSO)?
Days sales outstanding is the average number of days it takes to collect payment after a credit sale. It's the turnover ratio expressed in days, and in Australia it's often called debtor days or the average collection period. They all measure the same thing.
DSO = Days in period ÷ AR turnover ratio
DSO (direct method) = (Average accounts receivable ÷ Net credit sales) × Days in period
Both formulas give the same answer. Using the plumbing example: ($22,000 ÷ $264,000) × 365 = 30.4 days, exactly 365 ÷ 12. Many people find DSO easier to act on, because you can put it next to your payment terms and see the gap.
Worked example: a consultant over one quarter
A consultant measures the July–September 2026 quarter, which has 92 days. Credit sales were $49,500 including GST. Receivables were $16,500 on 1 July and $12,100 on 30 September.
- Average receivables = ($16,500 + $12,100) ÷ 2 = $14,300
- Turnover ratio = $49,500 ÷ $14,300 = 3.46 for the quarter
- DSO = 92 ÷ 3.46 = 26.6 days
On 30-day terms, that's inside terms, and the falling closing balance shows the consultant collected some older invoices during the quarter. Don't compare a quarterly turnover of 3.46 with an annual figure of 12. Compare DSO with DSO, because days are comparable across periods and ratios aren't.
What is a good accounts receivable turnover ratio?
A good ratio is one where your DSO is close to your payment terms. There's no single Australian benchmark that applies to every business, and averages across industries hide huge differences in terms, so the most useful comparison is with your own terms and your own past results.
This table shows what your numbers would be if every customer paid exactly on the due date. It's arithmetic, not a target from a survey:
| Your payment terms | DSO if everyone paid on time | Turnover ratio if everyone paid on time |
|---|---|---|
| Net 7 | 7 days | 52.1 |
| Net 14 | 14 days | 26.1 |
| Net 30 | 30 days | 12.2 |
| 30 days EOM | about 45 days (invoices issued evenly through the month wait about 15 days for month-end, plus 30) | about 8.1 |
Read your result against your row. DSO of 30 days is excellent on 30-day EOM terms, fine on Net 30, and a problem on Net 7. If your DSO is more than a week or two beyond your terms, look at your aged receivables report to find out whether it's lots of slightly late payers or one or two very late ones.
If you supply large businesses, their published payment performance is worth checking before you agree to their terms. Under the Payment Times Reporting Scheme, businesses with annual consolidated revenue of $100 million or more report how quickly they pay small business suppliers, and the reports are on the Payment Times Reporting register. A customer that typically pays in 60 days will push your DSO up whatever your invoice says.
How is the turnover ratio different from an aged receivables report?
The turnover ratio and DSO are averages across all your customers for a whole period; the aged receivables report is a list of individual unpaid invoices on one day. You use the first to judge whether collections are improving and the second to decide who to call.
An average can hide a problem. A DSO of 25 days on Net 14 terms might mean every customer is about 11 days late, or it might mean most pay on time and one customer owes $8,000 from four months ago. Only the aged report tells you which. Check DSO monthly or quarterly as the trend line, and run the aged report weekly as the action list.
Why can the turnover ratio be misleading?
The ratio uses only two snapshots of receivables, so anything unusual on those two days distorts it. Treat a sudden change as a reason to look at the detail, not as a verdict.
- Seasonality. A landscaper with a big December invoice run will show high receivables on 31 December and a worse ratio for that quarter, even if everyone pays on time.
- One large invoice. A single $30,000 job invoiced on the last day of the period lifts closing receivables and makes DSO look worse than it is.
- Cash sales included. Counting card payments taken on the spot inflates sales and makes the ratio look better than your invoice collection really is.
- The GST mismatch. Ex-GST sales against GST-inclusive receivables makes it look about 10% worse.
- Written-off debts. Writing off old debts lowers receivables and improves the ratio overnight without a cent being collected.
For a steadier figure, calculate average receivables from month-end balances (add up 13 month-ends and divide by 13) instead of just the opening and closing figures.
How do you improve your accounts receivable turnover ratio?
Shorten the time between finishing the work and money landing in your account. Every day you cut from that gap comes straight off DSO.
- Invoice the same day. A job finished Friday and invoiced the next Thursday has added six days to DSO before the terms even start.
- Use shorter terms. Moving new customers from Net 30 to Net 14 is the biggest single lever. Our guide to payment terms in Australia has wording you can copy.
- Take deposits on bigger jobs. Money collected up front never becomes a receivable. See how to issue a deposit invoice.
- Make paying easy. BSB and account number, PayID, and the invoice number as the reference on every invoice.
- Follow up on a schedule. A reminder the day after the due date and again at 7 and 14 days overdue recovers most late payments.
business.gov.au has more ideas in its guide to improving your cash flow.
What is lowering DSO worth?
Cash tied up in receivables is roughly (DSO ÷ 365) × annual credit sales. For the plumbing business, cutting DSO from 30 days to 20 days releases about (10 ÷ 365) × $264,000 = $7,233 of cash, permanently, without making a single extra sale. That's money that stays in your account to cover BAS, wages and materials instead of sitting in customers' accounts. It feeds directly into your working capital and your cash flow forecast.
This article is general information, not legal, tax or financial advice. For guidance specific to your situation, see business.gov.au and the ATO, or speak to a registered tax agent or BAS agent.
Frequently asked questions
What is the formula for accounts receivable turnover ratio?
Net credit sales divided by average accounts receivable, where average accounts receivable is the opening balance plus the closing balance, divided by two. For example, $264,000 of credit sales and average receivables of $22,000 gives a ratio of 12.
How do you convert the turnover ratio into days sales outstanding?
Divide the number of days in the period by the turnover ratio. Over a year, DSO = 365 ÷ turnover ratio, so a ratio of 12 means a DSO of about 30.4 days.
Is debtor days the same as DSO?
Yes. Debtor days, days sales outstanding and average collection period all measure the average number of days customers take to pay after you invoice them. Debtor days is the term many Australian accountants use.
Should I include GST when calculating DSO?
Use the same basis for both numbers. Receivables include GST, so either use GST-inclusive sales or remove GST from receivables by dividing by 1.1. Mixing them makes DSO about 10% too high.
Is a higher accounts receivable turnover ratio always better?
Mostly, because it means you collect faster. But a very high ratio can mean terms so strict that you're turning away good customers. The aim is a DSO close to your payment terms, not the highest number possible.
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