The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. Fill in the "Period" column.Fill in the column titled "Period" with your payment dates. Loan amortization schedule. 3. 4, Enter values, Loan summary. This Excel spreadsheet makes it easy to view the amortization of a home loan with optional extra monthly payments. Adding extra principal payments in order to pay off the loan earlier than the loan contract calls for. In this tutorial we will add this feature. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments.