The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. This spreadsheet creates an amortization schedule for a fixed-rate loan, with optional extra payments.Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. Use these calculator templates to help you navigate your loans, budgets, net worth, and more. Fill in the column titled "Period" with your payment dates. Input the month and year for the first payment loan within cell A8. There are three fields to fill in: home price, down payment and mortgage interest rate. In the dropdown box, choose your loan term. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments. LendingTree's personal loan payment calculator can help you see how much your loan could cost, including principal and interest.