Amortization Schedule
A complete payment-by-payment breakdown for any loan.
Generate a complete amortization schedule for any loan — every payment broken into principal and interest, with the running balance. Add a start date for calendar dates and download the full table as a CSV.
Add an extra monthly payment to see how the schedule shortens. All calculations are private and run in your browser — nothing is uploaded.
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Formula
Each payment
interest = balance × (annual rate ÷ 12)
The rest of the fixed payment reduces principal; the balance carries to the next month.
How to use the amortization schedule
- 1Enter the loan amount, annual interest rate, and term in years.
- 2Optionally add an extra monthly payment and a start month/year for calendar dates.
- 3Toggle Yearly summary or Monthly detail, and use Download CSV to export the full schedule.
Examples
| Example | Input | Result |
|---|---|---|
| $250k, 6.5%, 30 yr | no extra | 360 payments |
| With extra $200 | $250k, 6.5%, 30 yr | paid off years early |
| Export | any loan | Download CSV |
How to read an amortization schedule
Each row is one payment. The Payment column is constant for a fixed-rate loan; the Principal and Interest columns show how that payment splits, and the Balance column is what remains afterward. Over time, the principal portion grows and the interest portion shrinks as the balance falls. The schedule ends on the month the balance reaches zero.
Why early payments are mostly interest
Interest each month is charged on the outstanding balance, which is largest at the beginning. So early on, most of your payment covers interest and only a little chips away at principal. As the balance declines, less interest accrues and more of each payment goes to principal — which is why extra payments early in the loan are so powerful.
This calculator provides estimates for educational purposes only and is not financial advice. Actual loan terms may include fees or rate changes not modeled here.
Frequently asked questions
What is an amortization schedule?
It's a complete table of every payment on a loan, showing how each payment divides between interest and principal and how the balance declines to zero over the term.
How do I read an amortization table?
Read it row by row: each row is one payment with its principal portion, interest portion, and the remaining balance. Early rows are interest-heavy; later rows are principal-heavy.
Why do early payments have more interest than principal?
Interest is charged on the outstanding balance, which is highest at the start of the loan. As you pay the balance down, the monthly interest shrinks and more of each fixed payment goes to principal.
How do extra payments change the amortization schedule?
Extra payments reduce the principal immediately, so the balance reaches zero sooner. The schedule becomes shorter and the total interest paid drops.
Can I download my amortization schedule?
Yes. The Download CSV button exports the full month-by-month schedule. The file is generated entirely in your browser — none of your numbers are uploaded.
What is the difference between amortization and depreciation?
Amortization spreads the repayment of a loan (or the cost of an intangible asset) over time. Depreciation spreads the cost of a tangible asset, like a vehicle or machine, over its useful life. Both allocate value over time, but apply to different things.
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