Interest Auditor

Use this calculator to see how much interest you should have been charged on your loan.  Enter the details from a recent loan statement to calculate what your interest charge should have been.

Disclaimer: The method used to calculate interest is based on the daily balance and the number of days in the statement.  The formula was written by The Finance Guy, it should not be considered as an accurate of how your bank calculates interest.  It is an indication only, and small differences can be expected.

This calculator is part of The Finance Guy Mortgage Calculators