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MortgageMath.app

Mortgage Amortization Schedule

Enter your loan details below to generate a complete amortization schedule showing every payment, how much goes to principal, how much to interest, and your remaining balance.

= $80,000

Monthly Payment
$2,129
Loan Amount
$320,000
Total Interest
$446,428
Total Cost
$846,428

Payment Breakdown

Down Payment$80,000 (9.5%)
Principal$320,000 (37.8%)
Total Interest$446,428 (52.7%)

What Is an Amortization Schedule?

An amortization schedule is a complete table of periodic loan payments showing the amount of principal and interest that make up each payment. Early in a mortgage, most of your payment goes toward interest. Over time, as the principal balance decreases, more of each payment goes toward principal.

How to Read Your Amortization Table

  • Payment # — which payment number in the loan term
  • Principal — the portion reducing your loan balance
  • Interest — the cost of borrowing for that period
  • Balance — remaining loan balance after the payment

How Extra Payments Affect Amortization

Making extra principal payments accelerates your amortization — you pay less total interest and pay off your loan sooner. Even one extra payment per year can shave years off a 30-year mortgage and save tens of thousands in interest.