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Prompt Payment Due Date and Interest Rate Calculator

This calculator returns the due date and interest rate applicable to a late payment based on the date the service/goods were received or the invoice date (whichever was later). If you would like to calculate the dollar amount of interest on a late payment, use the Prompt Payment Interest Calculator.

Enter the later of the following dates (or enter both to let the calculator decide which is later):

Service/Goods Date:

The date the services or goods were received.

Invoice Date:

The date the invoice was received.