The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates.You can create an Excel amortization table with changing interest rates. Here's how you can build it. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments. Use our Custom GPT to Quickly Build an Advanced Mortgage Amortization Schedule in Excel. Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. Estimated interest rate. To calculate the depreciation value, Excel has built-in functions. Credit unions are notforprofit and often offer higher interest rates on deposits, lower rates on loans and personalized service.