Amortization Calculator FAQ

It builds a payment-by-payment schedule showing how each mortgage payment splits between interest and principal, and how your balance falls to zero over the life of the loan.

The Complete Guide

An amortization schedule turns an abstract loan into a concrete timeline. It shows exactly how much interest you pay each year and the precise month your balance crosses key milestones, which is invaluable for planning extra payments or a future sale.

The headline insight is front-loading. On a 30-year loan you can pay tens of thousands in interest before making much dent in the balance. Seeing that on paper is what motivates many borrowers to add principal early or choose a shorter term.

Use the schedule alongside the extra-payment calculator. A single annual extra payment, applied to principal, shifts every later row of the schedule forward and can shave years off the term — the amortization view makes that effect visible.

How the Calculator Works

The calculator computes a fixed monthly payment, then walks the loan forward month by month. Each period it charges interest on the remaining balance, applies the rest of the payment to principal, and reduces the balance — repeating until the loan is paid off.