Fill in the "Period" column. Fill in the column titled "Period" with your payment dates.Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. Step 1: Set up your amortization table. Open a new Excel sheet and create input cells for the known components of your loan. 1. Download the amortization schedule from Microsoft. 2. Open the template in Excel. 3. This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. Have a loan you want to pay off? Try this amortization schedule Excel template to calculate your payments and track your payoff progress.