Fill in the column titled "Period" with your payment dates. Input the month and year for the first payment loan within cell A8.Microsoft Excel can help you manage your finances. Use Excel formulas to calculate interest on loans, savings plans, down payments, and more. This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. This example teaches you how to create a loan amortization schedule in Excel. 1. We use the PMT function to calculate the monthly payment on a loan. In this tutorial, we'll create a fully dynamic amortization schedule based on the number of months entered. In this tutorial we will see how to create an amortization schedule for a fixed-rate loan using Microsoft Excel and other spreadsheets. An Excel amortization schedule for a straight-line loan, with examples of Excel's IPMT.