Cars are the second-largest purchase most Americans make, and the financing terms dramatically affect total cost. Our auto loan calculator shows your monthly payment, total interest paid, and true cost of the vehicle—helping you evaluate dealer financing vs bank loans vs credit union rates before you negotiate.
Average auto loan rates in 2024 range from about 5%–8% for new cars with good credit (720+) to 10%–15% for used cars or borrowers with fair credit. Credit unions typically offer rates 1–2% below banks. Always get pre-approved before visiting the dealer.
Shorter terms (36–48 months) have higher monthly payments but lower total interest. Longer terms (60–84 months) reduce monthly payments but cost much more in interest and risk leaving you underwater if the car depreciates faster than you pay it off. Experts recommend maximum 60 months.
Getting pre-approved by your bank or credit union first gives you a baseline rate and negotiating power. Dealer financing can sometimes be competitive—dealers earn a commission on financing—but pre-approval protects you from inflated rates and allows you to separate the car price negotiation from financing.
Guaranteed Asset Protection (GAP) insurance covers the difference between your loan balance and the car's actual cash value if it is totaled or stolen. It is most valuable when you make a small down payment, have a long loan term, or buy a vehicle that depreciates quickly.
Financial advisors typically recommend 20% down on a new car and 10% on a used car to avoid being underwater immediately (cars depreciate 15–25% in the first year). Even a modest down payment reduces monthly payments and total interest significantly.
The 20/4/10 rule suggests: 20% down payment, loan term of no more than 4 years, and total monthly vehicle costs (payment + insurance) no more than 10% of gross monthly income. This keeps auto expenses at a manageable level relative to income.