The tutorial shows how to build an amortization schedule in Excel to detail periodic payments on an amortizing loan or mortgage. Here is the link to my spreadsheet where you can calculate a loan over x years to be paid back monthly.It will give you the amortized payment amount. Loan amortization schedule. 3. 4, Enter values, Loan summary. No. Due Date, Due Payment, Extra Payment (Recurring), Extra Payment (Irregular), Interest Paid, Principal Paid, Balance. Loan Amortization Schedule, This spreadsheet creates an amortization schedule for a fixed-rate loan, with optional extra payments. I would like to be able to calculate the remaining amount of loan due after each payment on a loan with irregular payment dates and irregular amounts. Each bidder is required to acknowledge receipt of an addendum issued for a specific project. Instructions for a complete electronic submission are found under Instructions-Electronic Submit.