Amortization Schedule Calculator

See a month-by-month breakdown of principal, interest, and remaining balance for the entire life of your loan.

How it works

Given your loan, rate, and term we compute the monthly payment with the standard mortgage formula, then walk period-by-period splitting each payment into interest (balance × monthly rate) and principal (payment − interest). Any extra payment applies directly to principal.

Frequently asked questions

What is amortization?

The process of paying off a loan on a fixed schedule. Early payments are mostly interest; over time the balance shifts toward principal.

Why does interest start so high?

Interest is calculated on the outstanding balance. With a full balance at the start, most of your payment goes to interest — that flips as principal drops.

How do extra payments help?

Every extra dollar reduces the principal today, which lowers every future interest charge and shortens the loan.

Can the schedule change?

Yes if you recast, refinance, or hit an adjustment (on an ARM). Fixed-rate loans otherwise follow this schedule exactly.

Is the payment always the same?

P&I is fixed on a fixed-rate mortgage. Escrow (taxes, insurance) can change year to year.

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