I'll be showing you how to design an annual amortization scheduled as a loan amortization schedule and a monthly loan amortization schedule. Use the following formulas to show the total payment, interest portion of the payment, and principal portion of the payment.This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments. Use these calculator templates to help you navigate your loans, budgets, net worth, and more. Create a loan summary and payment schedule based on the terms of the initial loan with this loan amortization schedule template. Then, once you have computed the payment, click on the "Create Amortization Schedule" button to create a chart you can print out. Make math easier with these free calculator templates. Sample 20-year Amortization Schedule. This Excel file can be used as a guide for projecting debt service. You can get quotes from up to five lenders in minutes through LendingTree.