Loan Amortization Schedule with extra payments every period, variable periods in Excel - Office 365 In this trick we want to see an amortization table with a variable rate.The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. Have a loan you want to pay off? Try this amortization schedule Excel template to calculate your payments and track your payoff progress. Create automatic loan amortization schedule table with PMT, IPMT, PPMT formulas in Microsoft Excel This Microsoft Excel template illustrates how to create a loan amortization schedule, as well as dealing with additional payments and variable interest rates. I'll be showing you how to design an annual amortization scheduled as a loan amortization schedule and a monthly loan amortization schedule. Variable Interest Rate Loan Amortization Schedule in Microsoft Excel. To use our amortization calculator, type in a dollar figure under "Loan amount.