Auto Loan Calculator

Auto loan interest rates are determined by a combination of factors including your credit score, the loan term, whether the vehicle is new or used, and the lender you choose. Dealership financing is convenient but often includes a rate markup of 1-3% above what the lender actually approved. Getting pre-approved through your bank, credit union, or an online lender before visiting the dealership gives you a baseline rate to negotiate against and protects you from inflated dealer financing offers. Credit unions consistently offer some of the lowest auto loan rates available, often 1-2% below national bank averages.

Negotiation Tips for a Better Deal

Always negotiate the total purchase price of the vehicle separately from the financing terms. Dealers often use the "four-square" technique to bundle price, trade-in value, down payment, and monthly payment together, making it difficult to track where you are actually overpaying. Focus on the out-the-door price first, finalize trade-in value second, and discuss financing last. Never reveal your monthly payment target, as dealers can manipulate loan terms to hit that number while increasing the total cost. Research the vehicle's fair market value using tools like Kelley Blue Book or Edmunds before stepping onto the lot.

The 20/4/10 Rule for Responsible Car Buying

Financial advisors recommend the 20/4/10 rule as a guideline for affordable auto financing: put at least 20% down to avoid being underwater on the loan, choose a loan term of 4 years or less to minimize interest and maintain equity, and keep total transportation costs (including payment, insurance, gas, and maintenance) under 10% of your gross monthly income. Following this rule prevents car payments from crowding out savings and other financial goals. A car that fits the 20/4/10 rule may not be the most exciting option, but it keeps your finances healthy long-term.