The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. This Excel spreadsheet makes it easy to view the amortization of a home loan with optional extra monthly payments.This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. Explore what an amortization schedule in Excel is. Learn how to track payments, handle extra payments, and analyze loan schedules with easy steps and tips.