Mortgage calculator
Mortgage Amortization Calculator
Preview how principal and interest change over your loan.
Built for U.S. financial rules and mortgage conventions.
September 2026
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Schedule preview
Your first year
| month | payment | principal | interest | balance |
|---|---|---|---|---|
| 1 | $2,781 | $398 | $2,383 | $439,602 |
| 2 | $2,781 | $400 | $2,381 | $439,202 |
| 3 | $2,781 | $402 | $2,379 | $438,800 |
| 4 | $2,781 | $404 | $2,377 | $438,396 |
| 5 | $2,781 | $406 | $2,375 | $437,990 |
| 6 | $2,781 | $409 | $2,372 | $437,581 |
| 7 | $2,781 | $411 | $2,370 | $437,170 |
| 8 | $2,781 | $413 | $2,368 | $436,757 |
| 9 | $2,781 | $415 | $2,366 | $436,342 |
| 10 | $2,781 | $418 | $2,364 | $435,924 |
| 11 | $2,781 | $420 | $2,361 | $435,504 |
| 12 | $2,781 | $422 | $2,359 | $435,082 |
Understand the estimate
What your result means
Each scheduled payment contains interest and principal. Early in a fixed-rate loan, interest is calculated on a larger balance, so it usually makes up a larger share.
As the balance falls, more of the scheduled payment can go toward principal. The remaining balance is what would still be owed before any future interest accrues.
Important considerations
Before you decide
- Confusing total payment with principal paid.
- Assuming the first-year pattern remains unchanged for the full loan term.
How we calculate
A transparent estimate you can inspect.
Formula
Fixed-rate amortization; the table shows the first 12 months.
Privacy
Your values are calculated locally and are not sent to a server by this calculator.
Use with care
Results are for informational purposes, not financial, tax, legal, lending, or investment advice.
Understanding your results
Each row separates the monthly payment between interest and principal.
Assumptions and limitations
- Fixed rate and regular monthly payments.
Common questions
Before you decide
Why do early mortgage payments include more interest?
Interest is calculated on the remaining balance, which is largest at the beginning of the loan.
Does this show the full loan?
It models the fixed-rate loan schedule from the entered balance, rate, and term.