The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. You can create an Excel amortization table with changing interest rates.Here's how you can build it. This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance.