Mortgage Amortization Schedule Calculator
Generate a mortgage amortization schedule showing monthly payment breakdown, principal, interest, and remaining balance.
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See every mortgage payment broken down
A mortgage payment is split between interest and principal, and that split changes every month. This calculator generates a full amortization schedule showing each monthly payment’s breakdown into principal and interest, and the falling balance.
Why early payments barely touch the principal
At the start of a mortgage, almost all of each payment goes to interest, because interest is charged on the large outstanding balance. Only a small slice reduces the principal. As the balance falls, the interest portion shrinks and the principal portion grows, so late payments are mostly principal. Seeing this schedule explains why a mortgage builds equity so slowly at first, and why extra early payments, which go straight to principal, have such an outsized effect.
The full picture
This is an estimate for planning from the figures you enter, not financial advice, and real outcomes depend on rates and rules that change. Confirm anything important with the relevant institution or a qualified adviser. The calculation runs entirely in your browser, so your financial figures are never uploaded.
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Frequently Asked Questions
Why is early payment mostly interest?
Because interest is charged on the outstanding balance, which is largest at the start. So early payments are mostly interest and only slowly reduce the principal.
How does the split change over time?
As the balance falls, the interest portion of each payment shrinks and the principal portion grows, so late payments are mostly principal.
What is an amortization schedule?
A table of every payment over the loan, showing how much goes to interest, how much to principal, and the remaining balance after each.
Why do early extra payments help so much?
Because they go straight to principal, reducing the balance that all future interest is charged on, which saves far more than a late extra payment.
Is this financial advice?
No. It is an estimate. Confirm the exact terms with your lender.
Privacy & Security
Calculated locally in your browser. Use as an estimate; lender calculations may differ.
How to Use
Enter loan amount, rate, and term to generate an amortization schedule.
Disclaimer: This tool is provided "as is" without warranty of any kind. Results are for educational and utility purposes.
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