Amortize

Where every dollar of a mortgage payment goes

Amortization schedule with an extra-payment slider

In one paragraph

Type the balance, rate and months remaining from your statement. The schedule shows the payment those figures imply, total interest left, and a year-by-year table. Move the slider to add extra principal each month and the payoff date and interest saved update. Nothing is prefilled and nothing leaves your device.

Last reviewed against the primary sources listed below.

Your loan, from your statement
Extra principal each month none

How to read your result

The result compares your regular schedule with the schedule including the extra principal you entered: payoff date, months saved and interest saved.

What to do next

Check your loan for prepayment terms, then tell your servicer to apply extra money to principal.

Reading the table

Each row is a year: interest paid, principal paid, and balance at year end, with your extra amount included.

Common questions about interest

How do I calculate paying off my mortgage early?

Enter your balance, rate and months left, then add an extra monthly amount. The tool shows the new payoff month and interest saved.

Is this a mortgage calculator with extra principal payment?

Yes. It builds a full schedule from your own loan figures and lets you add a monthly extra principal amount.

Primary sources