Amortization Calculator
Generate complete amortization schedules with payment-by-payment breakdown. See exactly how much of each payment goes to principal vs. interest. Model extra payment scenarios to see how you can pay off your loan faster and save thousands in interest.
Loan Details
Enter the total loan amount or principal
Annual percentage rate (APR) for your loan
Add extra payment to see how it accelerates payoff and reduces interest
Detailed Payment Schedule
View complete month-by-month breakdown with principal, interest, and remaining balance
Export Options
Download amortization schedule as CSV for spreadsheets and record-keeping
Extra Payment Modeling
See how additional payments affect schedule and reduce payoff date and total interest
How to Use Amortization Calculator
Enter Loan Amount
Input the total loan amount or principal. This could be a mortgage, auto loan, personal loan, or any other type of amortizing loan.
Set Interest Rate & Term
Enter your annual interest rate (APR) and select the loan term in years. Common terms are 15, 20, 25, or 30 years for mortgages.
Add Extra Payment (Optional)
Enter any extra monthly payment you plan to make. The calculator will show you how much interest you'll save and how many months earlier you'll pay off the loan.
View Schedule & Export
Review the complete amortization schedule showing payment breakdown by month or year. Export to CSV for your records or tax purposes.
Frequently Asked Questions
What is an amortization schedule?
An amortization schedule is a table showing every loan payment broken down by principal and interest, plus remaining balance. For example: Month 1 of a $200,000 mortgage at 6% shows $1,199 payment: $1,000 interest, $199 principal. Schedule shows how principal increases over time.
Why is most of the early payment interest?
Interest is calculated on remaining balance. Early payments target mostly interest because balance is high. As balance decreases, more goes to principal. Month 1: mostly interest. Month 360 (final): mostly principal. This is normal loan amortization.
How much of my payment is tax-deductible?
Mortgage interest is tax-deductible (not principal). Our amortization schedule shows exactly how much interest you paid annually for tax purposes. Personal loan interest is generally not deductible.
What if I make extra payments?
Extra principal payments reduce remaining balance, cutting future interest. A $200 extra monthly payment on a 30-year mortgage can reduce payoff to 20 years and save $60,000+ in interest. Our calculator models extra payment impact.
Can I see total interest paid?
Yes! Our amortization schedule totals interest paid over the loan term. A $300,000 mortgage at 6% over 30 years pays ~$215,000 total interest. The schedule shows cumulative interest by year.
Can I download the schedule?
Yes! Export complete amortization schedule as CSV to import into Excel. Perfect for financial planning, tax purposes, or lender records.