Want to Calculate Loan Payments Offline? Excel Mortgage Calculator.The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. The early majority amount is of interest while later the amount of principal loan is in the schedule. License: Personal Use (not for distribution or resale). To obtain a commercial use license, purchase the Vertex42 Loan Amortization Schedule. It would be great if you could include options for payment periods such as monthly, annually, and semi-annually in a dropdown list. The value of the principal and the interest payments, however, will be different between each payment period.