Unearned Interest Report Report Formulas Principle + Charges = Balance Unearned + Earned = ChargesUnearned = Interest not yet earned until loan has maturedEarned = Interest earned to this point from current loan agePayoff + Unearned = BalancePayoff = Total due today if loan is paid off today. This will be an amount less some interest not yet earned.Balance = Total due on the loan if the loan matures to its maximum payments and all interest is earned. Detailed Video Explaining the Unearned Interest Report