The Guide to Car Loans & Buying a Car

Financing a car is the same arithmetic as a mortgage, just shorter. Four numbers set your payment: the price you finance (after down payment and trade-in), your APR, and the loan term in months. Each payment covers interest plus a slice of principal — that's amortization.

Sales tax and fees usually get rolled into the amount financed too, which quietly raises the balance. A larger down payment or trade-in shrinks it. Model your real numbers in the car loan calculator.

The price on the windshield isn't the real cost — insurance, fuel, maintenance and depreciation all ride along. A practical guideline is to keep total car costs under 15–20% of take-home pay, with the loan payment alone near 10%.

Buying well under the maximum a dealer will approve leaves room for the rest of life and protects you if money gets tight. Read how to finance a car without overpaying for the full method.

A longer loan feels friendlier because the payment drops — but you pay for that comfort in interest, and you spend years owing more than the car is worth ("underwater"). Here's the same $30,000 financed at 7% across terms:

If you can only afford the car at 72 or 84 months, that's usually the math telling you to buy less car — not to stretch the loan. The early payoff calculator shows what extra payments save.

When an automaker offers either a cash rebate or 0% financing, run both — the winner depends on the amounts and the term. A big rebate shrinks the loan; 0% shrinks the rate. A large rebate often wins on a shorter loan, while 0% can win on a longer one.

Don't guess — the rebate vs. low-interest calculator settles it for your exact numbers in seconds.

Leasing means a lower monthly payment but you own nothing at the end; buying costs more monthly but builds equity. Over a single term leasing looks cheaper; over the long run, buying and keeping the car past the loan almost always wins, because you eventually drive payment-free.

Leasing fits drivers who want a new car every few years and stay within mileage limits. See the full comparison in lease vs buy a car and the lease vs buy calculator.

The dealership is convenient, but convenience has a price. Get pre-approved at your bank or credit union first, then let the dealer try to beat it — credit unions often carry lower auto rates. Settle the car price before discussing financing, so a low rate isn't hidden inside a higher price.

Already have a car loan at a high rate? Refinancing can cut it, especially if your credit has improved since you bought. Check the savings with the auto refinance calculator.