Car Payment Calculator

How to Calculate Car Payments

Car loan payments are calculated using the standard amortization formula. The monthly payment depends on three main factors: loan amount (vehicle price minus down payment and trade-in), interest rate (APR), and loan term (number of months). Understanding these factors helps you make informed decisions and negotiate better deals.

The Car Payment Formula

The monthly payment formula is:

• M = P × [r(1+r)^n] / [(1+r)^n - 1]
• M = Monthly payment
• P = Principal (loan amount)
• r = Monthly interest rate (APR / 12 / 100)
• n = Number of months

Understanding Auto Loan Terms

Common auto loan terms and their characteristics:

• 36 months (3 years): Highest monthly payment, least interest paid. Best for those who can afford higher payments.
• 60 months (5 years): Most popular term. Good balance between monthly payment and total interest.
• 72 months (6 years): Lower monthly payment but more interest. Common for expensive vehicles.
• 84 months (7 years): Lowest monthly payment but highest total interest. Risk of being upside down.

Tips for Getting the Best Auto Loan

To secure the best auto loan deal:

• Check your credit score: Higher scores get better rates
• Get pre-approved: Know your rate before visiting dealers
• Compare multiple lenders: Banks, credit unions, and online lenders
• Make a larger down payment: At least 20% to avoid being upside down
• Choose shorter terms: Pay less interest over the life of the loan
• Negotiate the price: Focus on vehicle price, not monthly payment
• Watch for fees: Ask about all fees before signing

Understanding Total Cost

When comparing auto loans, look at the total cost, not just the monthly payment. A longer loan term may have a lower monthly payment but cost thousands more in interest. For example, a $30,000 loan at 6% APR costs about $3,200 more in interest over 72 months compared to 60 months. Always calculate the total cost before deciding on a loan term.