Annual Interest Rate: Many factors play a role in the interest rates you’re offered for car loans, but your credit score is the most influential. Average auto loan interest rates vary significantly based on credit score. Generally, a higher credit score will result in a lower interest rate, making loans more affordable. For example, individuals with excellent credit (750+) can expect rates around 3-4%, while those with poor credit (600-649) might face rates of 9-12%.