Loan Payoff Calculator

See how making extra payments toward your loan principal can save you money in interest and help you become debt-free sooner. Reviewed for clarity and functionality. This tool has not been reviewed by a licensed financial professional.

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Loan Details

Remaining principal
Your current required monthly payment
Additional amount toward principal

Your Payoff Analysis

Without Extra Payments
With Extra Payments
Time Saved
Interest Saved
Payoff breakdown
Total Interest (Normal Payoff)
Total Interest (With Extra Payments)
Total Paid (Normal)
Total Paid (With Extra)
Disclaimer: This calculator provides estimates for informational purposes only. Check your loan agreement for prepayment penalties. Not financial advice. Last updated: August 2026. Formula: Monthly amortization simulation with user-specified payments. Source: Standard amortization methodology (CFPB).
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How Extra Payments Work

When you pay extra toward your loan principal, you reduce the balance on which future interest is calculated. Each extra dollar goes 100% toward principal, accelerating your payoff and reducing total interest. Even small additional payments compound over time.

Worked Example

A $25,000 loan at 7.5% with a $500/month payment takes 61 months (5 years, 1 month) to pay off, with total interest of approximately $5,069. Adding $100 extra per month shortens payoff to 49 months (4 years, 1 month), saving approximately $1,018 in interest and 12 months of payments.