What does the Amortization Calculator show for each payment?

For every month it shows the payment amount, how much of that payment goes toward principal, how much goes toward interest, and the remaining loan balance after the payment.

How does the Amortization Calculator handle an extra monthly payment?

The extra amount is applied directly to principal each period on top of the scheduled payment, which shrinks the balance faster, shortens the payoff time, and reduces total interest.

Can I export the amortization schedule?

Yes. Use the Copy CSV button next to the schedule table to copy every row — month, payment, principal, interest, and balance — as CSV text you can paste into a spreadsheet.

Is the Amortization Calculator accurate for mortgages?

It uses the standard fixed-rate amortization formula that mortgage lenders use, but the results are estimates only, not financial advice — your actual mortgage may include escrow, PMI, or fees not modeled here.

Why does the last row of the amortization table have a slightly different payment?

The final payment is adjusted to pay off exactly what remains, so rounding across earlier months doesn't leave a tiny leftover balance.

Amortization Calculator Online

Build a full loan amortization schedule showing principal and interest for every payment. Estimates only, computed in your browser.

The Amortization Calculator runs entirely in your browser. The loan amount, rate, term, and generated schedule never leave your device. Results are estimates only, not financial advice.

Open the Loan Calculator

About Amortization Calculator

Amortization Calculator builds a full loan amortization schedule showing exactly how much of each payment goes to principal and how much goes to interest, from the first month to payoff. Enter a loan amount, annual interest rate, and term to see the fixed monthly payment, total interest, and total paid, then scroll a month-by-month table of every payment, principal portion, interest portion, and remaining balance. Add an optional extra monthly payment to see how much faster the loan pays off and how much interest it saves. It is useful for comparing mortgage, auto, personal, and student loan offers before you sign. Figures are estimates only, not financial advice, and everything computes locally — your loan numbers stay on your device.

Features

Computes the standard fixed-rate monthly payment for any loan amount, rate, and term
Generates a full amortization schedule with principal, interest, and balance per month
Shows total interest paid and total amount paid over the life of the loan
Optional extra monthly payment models faster payoff and interest savings
Copy a plain-text results summary or export the full schedule as CSV
Scrollable schedule table so long terms like 30-year mortgages stay readable
Clear error messages for invalid amounts, rates, or terms
Runs entirely in your browser — no loan details are uploaded

How to use the Amortization Calculator

Enter the loan amount, annual interest rate, and term in months
Optionally add an extra monthly payment to model early payoff
Review the monthly payment, total interest, and total paid summary
Scroll the schedule table or copy it as CSV for the full payment-by-payment breakdown

Example

Input

$10,000, 6%, 12 months

Output

Payment: $860.66
Total interest: $327.90

Common errors & troubleshooting

Monthly payment looks far too high. — Confirm the term is in months, not years — a 30-year mortgage is 360 months, not 30.
Rate entered as a decimal like 0.06 instead of a percentage. — Enter the annual interest rate as a percentage, e.g. 6 for 6%, not 0.06.
Extra monthly payment doesn't seem to shorten the schedule. — Make sure the extra payment field has a value greater than 0 — an empty field is treated as no extra payment.
Schedule table only shows part of a long-term loan. — The visible table caps at 360 rows for readability; copy the CSV button to get the complete schedule for longer terms.

Frequently asked questions

What does the Amortization Calculator show for each payment?: For every month it shows the payment amount, how much of that payment goes toward principal, how much goes toward interest, and the remaining loan balance after the payment.
How does the Amortization Calculator handle an extra monthly payment?: The extra amount is applied directly to principal each period on top of the scheduled payment, which shrinks the balance faster, shortens the payoff time, and reduces total interest.
Can I export the amortization schedule?: Yes. Use the Copy CSV button next to the schedule table to copy every row — month, payment, principal, interest, and balance — as CSV text you can paste into a spreadsheet.
Is the Amortization Calculator accurate for mortgages?: It uses the standard fixed-rate amortization formula that mortgage lenders use, but the results are estimates only, not financial advice — your actual mortgage may include escrow, PMI, or fees not modeled here.
Does the Amortization Calculator upload my loan details?: No. The Amortization Calculator runs entirely in your browser. The loan amount, rate, term, and schedule never leave your device.
Why does the last row of the amortization table have a slightly different payment?: The final payment is adjusted to pay off exactly what remains, so rounding across earlier months doesn't leave a tiny leftover balance.

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Interest Rate Calculator — Solve for the interest rate of a loan from its amount, payment and term.