Monthly Compounding Interest Calculator
The following on-line calculator allows you to automatically determine the amount of monthly compounding interest owed on payments made after the payment due date. To use this calculator you must enter the numbers of days late, the number of months late, the amount of the invoice in which payment was made late, and the Prompt Payment interest rate, which is pre-populated in the box. If your payment is only 30 days late or less, please use the simple daily interest calculator.
Please do not enter commas.