Create automatic loan amortization schedule table with PMT, IPMT, PPMT formulas in Microsoft Excel The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage.This finance video tutorial explains how to create an amortization table in excel. This video steps through the creation of a loan amortization schedule in Microsoft Excel and Google Sheets. 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. Fill in the "Period" column. Fill in the column titled "Period" with your payment dates. Does anyone know how to calculate the principal and interest payments after a one time extra principal payment on a mortgage in excel?