What is Average Days Delinquent?

Nicole Dwyer
Average Days Delinquent

Average days delinquent (ADD) is the average day’s invoices are past due, the amount of time between invoice due date and the date it is paid. This is a snapshot in time that will help your company evaluate, along with other calculations, the overall performance of your collections department and your ability to convert AR to cash.

Calculating ADD is a multi-step process that begins with knowing your Days Sales Outstanding (DSO).

First, calculate your average DSO:  

DSO = (Average AR / Billed Revenue) x Days

Next, determine your Best Possible DSO

Best Possible DSO = (Current AR / Billed Revenue) x Days

Use these formulas to get to your ADD

ADD= Days Sales Outstanding – Best Possible Days Sales Outstanding

When we use simple data, it looks like this: 

Total accounts receivables: $25,000
Current accounts receivables: $6,000
Credit sales made in a 30 day period: $15,000

DSO = ($25,000/$15,000) x 30
50 DSO

Best DSO = ($6,000/$15,000) x 30
12 Best DSO

ADD = 50 - 12
38 ADD

Why ADD matters

When evaluated with other key metrics, ADD can help you assess the health of your collections process.  Typically, ADD is evaluated in relation to DSO, to see if collections and cash flow are trending in the right direction. These two metrics typically trend in the same direction, letting you know if your collections efforts are improving or becoming less effective.  Occasionally, businesses find the numbers moving in different directions, which suggests that rather than seeing an improvement in collections efficiency, some other change has occurred like changing credit terms or a shortened AR cycle. 

This metric can be applied across a customer base as well as to individual customer accounts to track the health of the account. 


As a standalone metric, ADD doesn’t necessarily tell you a lot about your business. First, it’s a snapshot in time, so you want to capture the data over time and follow the direction it’s trending. Second, ADD can be impacted by factors such as a sudden spike in sales or a paid dispute. While this influx of business, especially if it’s a promotion running where payment is upfront, or a large outstanding dispute is finally paid, can create the illusion that ADD has improved, in fact, it hasn’t shifted at all. 

Nicole Dwyer
About the Author

Nicole Dwyer is Chief Product Officer for YayPay, bringing more than 10 years’ experience in accounts payable and receivable technology to ensure YayPay continues to meet the needs of its customers. Having spent her entire career in commercial payments, Nicole understands high- and low-value payment systems, the complexities of how businesses pay and get paid, and has worked with distributed teams spanning the globe. She is a graduate of Worcester Polytechnic Institute. Residing in New Hampshire with her husband, daughter, and son, they spend their time outdoors and creating new adventures.

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