How to Use
Enter the vehicle price, including any dealer fees, minus your down payment or trade-in value.
Input the annual interest rate - use your pre-approved rate or the dealer's quoted rate.
Choose your loan term in months (36, 48, 60, or 72 months are most common).
Instantly view your monthly payment and total interest paid over the life of the loan.
Compare scenarios: run the same loan amount at a credit union rate vs. dealer rate to see the dollar difference.
Factor in insurance, registration, and maintenance on top of the payment to get your true monthly transportation cost.
What Is This Tool?
A car loan calculator helps you estimate your monthly auto loan payment and the true total cost of vehicle financing. Cars depreciate rapidly - many lose 20% of their value within the first year - so understanding how your loan balance compares to the vehicle's declining market value is critical. Dealer financing can seem convenient, but dealers often mark up the interest rate as a profit center. Credit unions and online lenders frequently offer rates 1–3% lower on the same loan. The calculator lets you compare scenarios: a credit union rate vs. dealer financing, or a shorter loan term vs. a longer one. GAP insurance is worth factoring in too - it covers the difference between what you owe and what the car is worth if it is totaled or stolen before you pay it off.
Why It Matters
Auto loan rates and terms significantly affect the total cost of a vehicle. A $30,000 car financed at 4% over 48 months costs about $2,500 in interest. The same loan at 10% over 72 months costs over $10,000 in interest - and the car may be worth less than you owe for much of that period. Long loan terms (72–84 months) are increasingly common but carry real risk: you remain underwater - owing more than the market value - for years, making it difficult to sell or trade without rolling negative equity into your next loan.