HOME BUYING, EQUITY, AND BORROWING
Build a fixed-rate mortgage amortization estimate and review how principal and interest change over time.
Your result
Enter your values and select Calculate. Your result stays on this device.
Each monthly payment is split between interest on the remaining principal and principal repayment; an optional extra amount is applied to principal in this estimate.
Fixed interest rate, monthly payments, and the same extra payment every month. It excludes escrow costs, lender fees, and prepayment terms.
An amortization schedule shows why more of an early fixed payment is typically interest and more of a later payment is principal. You can also test a consistent extra principal amount.
Use case
Build a fixed-rate mortgage amortization estimate and review how principal and interest change over time. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear mortgage amortization calculator scenario with values you can verify before relying on the result.
Build a reliable scenario
Mortgage Amortization Calculator helps you check a specific home & mortgages question with figures that apply to you. Build a fixed-rate mortgage amortization estimate and review how principal and interest change over time. Build a fixed-rate mortgage amortization estimate and review how principal and interest change over time. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context. Use a clear mortgage amortization calculator scenario with values you can verify before relying on the result. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
Prepare Loan amount, Interest rate, Loan term and Extra monthly principal payment. Enter the current loan amount, rate, and original or remaining fixed term. Optionally add a recurring extra principal amount. Review the first-year schedule and estimated payoff time. Use your servicer statement for the official balance and payoff amount. Keep units, dates, currency, and time periods consistent.
The stated method is: Each monthly payment is split between interest on the remaining principal and principal repayment; an optional extra amount is applied to principal in this estimate. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
Fixed interest rate, monthly payments, and the same extra payment every month. It excludes escrow costs, lender fees, and prepayment terms. Illustrative schedule only. Your lender’s statement controls the actual payoff amount and dates.
Source and update
Last reviewed: 2026-08-08
Consumer Financial Protection Bureau mortgage guidanceIt is the repayment pattern that allocates each payment between interest and principal over the loan term.
They can when credited to principal. Confirm the payment-posting procedure and any prepayment terms with your servicer.
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