The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. Note: this spreadsheet is for educational purposes only.5, A fixed principal loan results in declining payments over the loan period. Fill in the column titled "Period" with your payment dates. Input the month and year for the first payment loan within cell A8. Loan amortization schedule. 3. Loan Amortization Schedule outlines the interest and principal payments owed on a mortgage, including the outstanding balance. We host an amortization calculator which enables you to create printable amortization tables. Limited to the loan balance specified on Schedule 4.15A less post closing principal payments.