Adding extra principal payments in order to pay off the loan earlier than the loan contract calls for. In this tutorial we will add this feature.13, Payment number, Payment date, Beginning balance, Scheduled payment, Extra payment, Total To use our amortization calculator, type in a dollar figure under "Loan amount. This Excel spreadsheet makes it easy to view the amortization of a home loan with optional extra monthly payments. This calculator will help you figure out your regular loan payments and it will also create a detailed schedule of payments. NerdWallet's early mortgage payoff calculator figures out how much more to pay. However, SBA loans require additional paperwork and extra fees. Making additional, principal-only payments can help chip away your principal in the early years of your loan. Use the farm or land loan calculator to determine monthly, quarterly, semiannual or annual loan payments.