How it works
The scheduled amortized payment is calculated first, then the extra amount is applied directly to principal each month.
Example
Adding $200 monthly to the default loan shortens repayment by several years and reduces interest.
This tool is for estimation and education, not financial, tax, or legal advice.
Frequently asked questions
Are the results exact lender quotes?
No. Results are estimates from the values entered and exclude terms or charges not shown.
Does the calculator send my numbers anywhere?
No. The calculation runs locally in your browser.
How should I use the result?
Compare scenarios, then verify important figures against a lender disclosure or account statement.
Related loan tools
All loan calculators · Loan Payoff Calculator · Refinance Break-Even Calculator