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Prompt Payment Interest Calculator

This calculator returns the dollar amount of interest on a late payment based on due date or end date (later of service/goods received or invoice date). If you need help determining the end date or due date, use the Prompt Payment Due Date and Interest Rate Calculator first.

Enter an end date or due date:
Selection Dates

The later of service/goods received or invoice received.

The date that the payment was due. Generally 30 days after the end date.
Enter the distribution date:

The distribution date is the date on the warrant, the transmit date for the direct deposit or the date that the payment was or will be available for distribution. For payments processed through USAS, it is the workday following the USAS payment cycle.

Enter the principal amount (the amount of the late payment):


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