Mortgage Amortization Calculator

A mortgage amortization calculator does something your lender will never volunteer to show you: it reveals exactly how every payment is divided between principal and interest — month by month, for the entire life of the loan.

In the early years of a standard 30-year mortgage, the overwhelming majority of every payment goes to interest. On a $350,000 mortgage at 6.5%, your first payment of roughly $2,212 sends approximately $1,896 to the bank as interest — and reduces your balance by just $316. The bank collects 86 cents of every dollar before a single cent builds equity.

This is not a hidden fee or a penalty. It is the standard structure of mortgage amortization — a front-loaded interest schedule that is completely legal, completely disclosed in your loan documents, and almost never explained clearly before you sign.

What a mortgage amortization calculator reveals

Use the mortgage amortization calculator below to see your full payment schedule — including the total interest you will pay over the life of the loan, how your balance reduces over time, and exactly how much extra monthly payments save in both interest and years.

For most households, the mortgage is the largest single interest obligation they carry. Understanding the amortization schedule is the first step toward making smarter decisions about extra payments, refinancing, and the true cost of the bank’s longest claim on your paycheck.

Already know your interest burden across all your debts? Start with the Interest vs. Income calculator to see the full picture — or view your personal financial plan if you’ve already run your numbers.