What Is Mortgage Amortization? (With Examples)
By Colson · Reviewed by Abodemic Editorial Standards · Updated June 1, 2026
Amortization is how a mortgage is paid off through fixed payments: early on, most of each payment is interest and little goes to principal; over time that flips. An amortization schedule shows the split for every month — and reveals why extra principal early saves so much interest.
What is amortization?
Amortization is the process of paying off a loan with fixed, regular payments. Each payment covers the interest due that month first, and whatever is left reduces the principal. Because interest is charged on the remaining balance, early payments are mostly interest and later payments are mostly principal. See it for your loan in the mortgage calculator.
Why are early payments mostly interest?
At the start, the balance — and therefore the interest charged on it — is at its largest, so a big slice of your fixed payment goes to interest. As the balance falls, the interest shrinks and more of each payment attacks the principal, which is why the balance drops slowly at first and faster later.
How an amortization schedule helps
The schedule lists every payment's interest/principal split and the remaining balance. It reveals two things: how little equity you build in the early years, and how much interest you skip by paying extra principal early. The extra payment calculator quantifies that saving.