How Extra Payments Shorten Your Mortgage
Every dollar you pay extra on your principal is a dollar you don't have to pay interest on for the rest of the loan. This can save you tens of thousands of dollars over 30 years.
Extra Mortgage Payment Calculator: Pay Off Early
Written by Calcida Team
Reviewed for accuracy and clarity
Last updated: April 2026
Calculate how much you can save by making extra principal payments on your mortgage. See how much faster you can be debt-free.
This calculator is useful for homeowners exploring how extra payments affect payoff time and interest. You will typically enter Loan amount, Interest rate, Loan term, Extra monthly payment.
The result represents new payoff date and total interest savings. If you are browsing similar tools, start with Mortgage Calculators or view the full calculators directory.
Also useful: Mortgage Payment Calculator with Taxes and Insurance, Mortgage Amortization Calculator & Schedule.
Loan Details
Extra Payments
Early extra payments reduce interest the most.
Applied at end of each year
Interest Saved
$105,429
Time Saved
6y 7m
New Payoff Date
2049
Balance Payoff Comparison
Key Insights
- By paying extra, you will save $105,429 in total interest.
- Your loan term will be shortened by 6 years and 7 months.
- New Total Interest Cost: $302,714 (Original: $408,142)
What should you do next?
After calculating your mortgage, explore these related tools:
How This Calculator Works
Making extra payments on your mortgage principal reduces the amount you owe, which in turn reduces the amount of interest you're charged in every future period.
Formula
New balance uses the same amortization update, with payment = M + Extra
Where:
- M = regular monthly payment
- Extra = additional principal paid each month
Extra payments go to principal and reduce future interest because interest is calculated on the remaining balance.
Example Calculation
Loan amount$300,000
Interest rate6.00%
Term30 years
Extra payment$200/month
Typical outcome
Pay off years earlier and save thousands in interest
Frequently Asked Questions
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