Mortgage Amortization Calculator
See how early mortgage payments split between principal and interest instead of relying on a single payment number.
Calculator
Mortgage Amortization Calculator
Enter the amount financed on the mortgage.
Use the annual mortgage rate before fees.
Thirty years is common, but shorter terms build equity faster.
Example values are loaded.
Result
Your result
A $340,000.00 mortgage would cost about $2,104.51 per month before taxes and insurance.
Monthly payment
$2,104.51
Year 1 principal
$3,946.76
Year 1 interest
$21,307.33
Year-one snapshot
Next steps
Compare before you move on
Most people use one calculator to answer the first question and a related tool to pressure-test the decision.
Borrowing
Mortgage Calculator
Estimate monthly mortgage payments with principal, interest, taxes, insurance, PMI, HOA, and other recurring housing costs included.
Borrowing
Loan Calculator
Estimate monthly loan payments, total interest, and total repayment with a standard amortized loan formula.
Borrowing
Refinance Calculator
Compare current mortgage payments with a refinance scenario and estimate monthly savings, total cost, and break-even based on how closing costs are handled.
What this calculator shows
An amortization view explains why early mortgage payments are often interest-heavy and why equity builds slowly at the start of the loan.
This tool keeps the output lightweight by focusing on the payment, first-year breakdown, and one-year remaining balance instead of a full table.
How to use it
- 1. Enter the mortgage amount, interest rate, and term length.
- 2. Review the monthly payment and the first-year split between interest and principal.
- 3. Use the remaining balance after one year to understand how slowly early amortization works.
Formula and assumptions
The monthly payment uses the standard amortized loan formula based on the loan amount, monthly rate, and total number of payments.
The first-year breakdown is simulated month by month by applying interest to the remaining balance, then subtracting principal from the payment.
Notes
Taxes, insurance, HOA dues, and extra payments are not included in this version of the amortization estimate.
Worked example
A long-term mortgage shows how much of the early payment stream is still going toward interest rather than principal reduction.
This example uses the default sample inputs loaded on reset. It does not update with the live calculator entries above.
Monthly payment
$2,104.51
Year 1 principal
$3,946.76
Year 1 interest
$21,307.33
Feedback
Found a problem on this page?
Report confusing fields, broken math, or missing assumptions with the exact inputs you used so the issue can be reproduced.
FAQ
FAQ
Why is so little principal paid during the first year?
Because interest is calculated on the full remaining balance early in the loan, a larger share of each payment goes to interest at the start.
FAQ
Is this the same as a full amortization schedule?
It uses the same payment math, but the output is condensed to the most useful early-loan milestones instead of a full month-by-month table.