Days Past Due (DPD) Calculator

Days Past Due (DPD) is the number of calendar days an invoice has remained unpaid beyond its original due date. If the due date has not yet passed, DPD is zero (the invoice is current). DPD is the primary metric used to classify receivables into aging buckets and determine eligibility in asset-backed lending facilities.

DPD = max(0, Report Date - Due Date). The due date is calculated as Invoice Date + Payment Terms (e.g., Net 30, Net 60). If the report date is on or before the due date, DPD is 0 (Current). If the report date is after the due date, DPD equals the number of calendar days between the due date and the report date.

The standard aging buckets in AR securitization are: Current (0 DPD, not yet past due), 1-30 DPD, 31-60 DPD, 61-90 DPD, 91-120 DPD, and 121+ DPD. Receivables in the 91+ or 121+ buckets are typically excluded from the borrowing base entirely. The exact cutoffs and eligibility rules vary by facility agreement.

DPD directly determines whether a receivable is eligible for inclusion in the borrowing base and at what advance rate. Current and lightly aged receivables (0-30 DPD) typically receive the highest advance rates (85-90%). As DPD increases, advance rates decrease or receivables are excluded entirely. DPD is also a key input to cross-aging rules: if a large percentage of an obligor's receivables are significantly past due, all of that obligor's receivables may become ineligible.