How to use this calculator
Inspect each scheduled payment, principal, interest and remaining balance. Add recurring, annual or multiple one-time principal payments. A selected first payment date labels the schedule; dates do not change the equal-period interest convention.
- Enter loan amount, annual interest rate (%), loan term (years) and review the remaining options.
- Select Calculate or change a value to update the result. Read the result label and units before copying.
- Use Reset to restore the worked starting values.
Formula and method
Constant nominal rate; final payment capped at remaining balance and interest. Fees are paid separately. Non-monthly date labels are approximate; actual lender payment and day-count rules may differ.
Worked example
A 1,200 zero-interest loan over one year pays 100 principal per month.
Questions about amortization schedule calculator
How do extra payments affect the schedule?
Extra monthly principal reduces the balance after each payment, lowering later interest and potentially shortening repayment. The contractual payment stays fixed, and the last payment is capped at the remaining balance plus interest. Lender penalties and fees are not modeled.
Choose the tool for your question
- Loan Payment: Get a compact fixed monthly payment and borrowing-cost summary.
What assumptions should I check?
Constant nominal rate; final payment capped at remaining balance and interest. Fees are paid separately. Non-monthly date labels are approximate; actual lender payment and day-count rules may differ.
Are my inputs saved?
Calculations run in your browser. We store only tool IDs for favorites and recent tools. Sharing inputs in links is disabled for this category.
Financial tools model the assumptions shown above and do not predict actual returns or replace lender disclosures or professional advice. Amounts are currency-neutral: use the same currency for every amount. No exchange rate is applied.