Amortization Calculator
Build a month-by-month loan amortization schedule with extra payments.
Enter your values to see the result.
Results are estimates for planning only. Actual figures depend on your lender or bank, fees, rounding and the exact dates used, so confirm the numbers before you sign anything.
Continue your work
- Mortgage Calculator — Include taxes and insurance.
- EMI Calculator — Get a quick monthly instalment.
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Clear instructions
Find steps, examples and limitations below.
Use online
Open the tool in a supported web browser.
Free to use
No sign-up required. Tool-specific limits may apply.
How to use the Amortization Calculator
Build a month-by-month loan amortization schedule with extra payments.
- 1 Enter the loan amount, rate and term.
- 2 Add an optional extra monthly payment and the first payment date.
- 3 Read the payment, payoff date and the full schedule.
Example and practical tips
Adding 200 a month to a 250,000 30-year loan at 6.5% saves over 90,000 in interest and pays it off years early.
Frequently asked questions
Why is most of the early payment interest?
Interest is charged on the remaining balance, which is highest at the start.
Do extra payments always go to principal?
Usually, but confirm with your lender that extra payments reduce the principal.
Report an issue
Something broken or not quite right? Tell us and we will look into it.