See how various extra payment strategies impact your loan payoff and total interest
How the Calculations Work
Monthly Payment Formula
Your monthly car loan payment is calculated using a standard amortization formula:
M = P × [r(1 + r)^n] / [(1 + r)^n − 1]Where:
- P = loan amount
- r = monthly interest rate
- n = total number of payments
Payment Breakdown
Each payment is divided into interest and principal:
- Interest = Remaining balance × monthly interest rate
- Principal = Payment − Interest
- New Balance = Previous balance − Principal
Effect of Extra Payments
Any extra amount you pay is applied directly to the principal, which helps:
- Reduce loan term
- Lower total interest paid
- Speed up full repayment
Payment Frequency Options
All schedules are converted into monthly equivalents:
- Monthly: 1 payment per month
- Bi-weekly: ~2.17 payments per month
- Annual: 1 payment per year
Calculation Standards
This tool follows widely accepted financial methods including:
- Standard amortization formulas
- Consumer Financial Protection Bureau (CFPB) guidelines
- Federal Reserve lending principles
Disclaimer
All results are estimates only and may vary based on lender policies, fees, and individual loan terms.