DSO (Days Sales Outstanding)
DSO indicates the average number of days it takes customers to pay outstanding invoices. This KPI provides insight into your accounts receivable management and directly impacts cash flow and liquidity. By monitoring your DSO, you can more quickly identify where payment delays are occurring and where corrective action is needed.
Learn Credit Risk
Meer learn Credit Risk
What is DSO?
DSO stands for Days Sales Outstanding: the average number of days between sending an invoice and receiving payment.
A low DSO typically means that invoices are paid quickly. A rising or consistently high DSO may indicate late payments, a less effective accounts receivable process, or an increasing credit risk
How do you calculate DSO?
The most commonly used formula is:
DSO = (average trade receivables ÷ credit sales) × number of days
Suppose an organization has an average of €750,000 in trade receivables and generates €4,500,000 in sales on credit over a 365-day period:
(€750,000 ÷ €4,500,000) × 365 = 61 days
The DSO is therefore 61 days. On average, it takes customers 61 days to pay.
Ideally, you should use only sales on credit. If that data is not available, total sales can be used as a rough estimate. However, the result may be less accurate.
What makes a good DSO?
There is no such thing as an ideal DSO that works for every organization. A good DSO depends, among other things, on your industry, your customers, and your agreed-upon payment terms.
For example, a DSO of 55 days may be healthy with a 60-day payment term, but high with a 30-day payment term. Therefore, be sure to compare your DSO with your payment terms, historical results, and relevant benchmarks.
Also look at the trend over several months. A rising DSO often tells us more than a single measurement.
What causes DSO to rise?
A higher DSO can have various causes. Customers may pay late due to financial difficulties, administrative delays, or payment disputes. However, the cause may also lie within your own organization, for example, when invoices are sent too late or overdue payments are not followed up on adequately.
Credit policy also plays a role. If customers’ creditworthiness is not assessed regularly, changes in payment risk may not be detected until it is too late.
How can you lower your DSO?
A lower DSO starts with a thorough understanding of your customers and an efficient accounts receivable process. Screen new customers before extending credit, and tailor payment terms and credit limits to the level of risk.
Continue to monitor existing customers. Changes in creditworthiness or payment behavior can be an early warning sign of payment problems. By responding promptly, you can prevent outstanding balances from rising unnecessarily.
Practical measures can also help, such as issuing invoices more quickly, setting clear payment terms, sending automatic reminders, and consistently following up on overdue payments. Learn which factors influence your DSO and how you can you can reduce DSO on a structural basis.
A credit check helps assess new clients, while credit monitoring provides insight into changes among existing clients.
What are the limitations of DSO?
DSO is a useful KPI, but it doesn’t tell the whole story. Seasonal factors, strong revenue growth, or a single large outstanding invoice can temporarily affect the result. Differences in payment terms among customers also make an average DSO less representative.
Therefore, combine DSO with information about the age of invoices, actual payment behavior, and credit risk. This will give you a more complete picture of your accounts receivable portfolio.
DSO and credit risk management
DSO shows how quickly customers actually pay. Credit information helps identify potential risks earlier and take targeted action.
By evaluating creditworthiness, payment history, and outstanding balances together, you can identify high-risk customers sooner, better tailor credit limits, and minimize late payments. This way, DSO becomes not only a KPI to report on retrospectively, but also a tool to improve your credit risk management.
For larger client portfolios, it helps by D&B Finance Analytics to centrally manage credit assessments, credit limits, and monitoring. This gives you faster insight into changes in your accounts receivable portfolio and allows you to take targeted action.
Is a low DSO always better?
Usually, yes, because cash becomes available more quickly. However, a very low DSO can also be the result of a strict credit policy that limits business opportunitie
What is the difference between DSO and payment terms?
The payment term is the number of days you agree upon with a customer. DSO shows the average number of days it actually takes customers to pay.
How often should you calculate DSO?
A monthly calculation quickly highlights trends and deviations and makes it easier to take timely corrective action.
Summary
DSO indicates the average number of days it takes customers to pay invoices. A rising DSO may indicate changes in payment behavior, credit risk, or the accounts receivable process. Compare your DSO with your payment terms and historical trends, and combine this KPI with creditworthiness and payment behavior for a more complete picture.
DSO is part of Credit Risk Management. Read more about it here on our Credit Risk Management page.
Direct contact with a Credit Risk specialist.
Be sure to check out our other Learn pages for additional insights and in-depth knowledge.
