Americans borrow tens of thousands of dollars for a new car and pay off the loan over many years. After a home, a car is the biggest purchase most people make. Yet buyers sometimes spend more time choosing the color of the car than learning the ins and outs of buying and financing it. As a result, they overpay by several thousand, or even more than ten thousand, dollars.
A real-life example
Ms. Bożena bought a new car for $22,000. But because the dealer talked her into a 5-year loan and into buying credit insurance, she will pay a total of $37,000.
Many of us believe that once we have carefully chosen a car model and haggled a good price, comparing offers online at Edmunds.com or KBB.com, our job is done. It is only the beginning. If we want to buy a car on credit, negotiating the right terms is extremely important. Dealers will often lower the price to make the customer happy, but they will make up for it on the loan terms. Not everyone knows that dealers make the most money not on the commission from the car, but precisely on financing it.
Here are the biggest traps waiting for an unsuspecting buyer.
Don’t let yourself be talked into taking out a loan
If you plan to buy a car on credit, that’s your business. But if you want to buy a new or used car for cash, don’t let anyone convince you that a loan is better for you.
Car salespeople go out of their way to talk customers into a loan or a lease, because that is where they make the most money. A salesperson who closes too many cash deals gets reprimanded and may even be fired. That is why salespeople bend over backwards to steer customers away from paying cash. They often use very crude methods, for example calculating how much interest the customer’s money would earn if left in the bank or invested. They leave out the fact that the loan will cost much more. Others say the cost of the loan can be deducted from taxes, even though interest on consumer loans has not been tax-deductible since 1991.
The exception is a new, temporary deduction: for 2025–2028, you can deduct up to $10,000 a year of interest on a loan taken out to buy a new car for personal use that underwent final assembly in the US. The deduction phases out for income (MAGI) above $100,000 ($200,000 for married couples filing jointly). Details are provided by the IRS: www.irs.gov.
Don’t believe in super deals
Car companies often advertise loans at 4.9%, at 2.9%, or even at zero interest. It is hard to beat such an offer, but before we jump at it enthusiastically, let’s check the restrictions. The price of the car is often higher, the offer applies to selected models, which on top of that have to be chosen from what the dealer has on the lot. The lowest-rate loans may be offered only for a short term and may require a large down payment.
Example: A dealer advertises a loan at 3.9%, which is less than the 4.9% at the bank. If you take out an $18,000 loan at 3.9% for 48 months, you will pay $405 a month. But if you take the rebate (say $2,000) and get a loan from the bank at 4.9%, you will pay $367 a month, which will save you about $1,818 in total.
The federal Consumer Financial Protection Bureau (CFPB) offers advice on how to compare auto loan offers before you sign a contract: www.consumerfinance.gov/consumer-tools/auto-loans.
Another trap is that the low rates advertised by the dealer (and by banks as well) are available to customers with the highest credit scores. It may turn out that you qualify for a loan, but a much less favorable one. By the time you find out, the deal will be wrapped up, the papers prepared, your wife impatient, and you will feel awkward backing out. All too often a clever salesperson will push an uninformed customer into a loan at a rate in the teens!
Find out about other sources of credit
The dealer is not the only source of auto loans. Truth be told, the dealer is often just a middleman, because the loan is provided by a finance company and the dealer earns a commission.
Auto loan rates change along with the general level of interest rates and depend on the customer’s credit history, the down payment, the loan term, the age of the car and other factors that affect the risk of default.
Find the best auto loan before you go to the dealer. People with the best FICO scores pay the lowest rates, and with each lower score range the loan becomes noticeably more expensive. Buyers with very low scores may not get a loan at all.
Conclusion: If you have a poor credit history, the advertised cheap loans are not for you.
Negotiate each part of the deal separately
Negotiate the price of the car, the method of payment and any trade-in, that is, the price of the old car you are selling to the dealer, separately. Negotiating everything together blurs the full picture and gives free rein to a clever salesperson, who will lose a little on one part of the deal in order to more than make up for it on the whole. For example, the dealer may generously offer five hundred dollars for a clunker that isn’t worth a plugged nickel, and then make up for it with an inflated interest rate on the loan.
Don’t tell the dealer what monthly payment you can afford
Many customers say: I really like the car, but I can’t pay more than, for example, $300 a month. If you put it that way, you will get neither a good price nor a good loan. The dealer will lower the payment not by cutting the price, but by stretching out the loan, even to seven years. He will also talk you into making a larger down payment.
Don’t take out the longest loan
Six- or even seven-year loans can be tempting, because we can pay them off in low installments. Nevertheless, they should be avoided, so as not to pay too much interest and so as not to owe more than the car is worth after a few years. Also avoid the minimum down payment and put down at least 20–30% of the price of the car.
Note: Never let a dealer talk you into a longer loan than you planned. Remember that dealers make their money above all on financing the cars they sell. Bigger and longer loans are in their interest, but not in yours.
Don’t buy credit insurance
Dealers often urge customers to buy credit insurance. Credit life insurance will pay off the loan if you die, and credit disability insurance will do so if you become unable to work. Unfortunately, this insurance is expensive and not at all worth its price.
Whatever the dealer may say, credit insurance is not mandatory! You have the right not to buy it. Check the contract carefully before signing it, because dealers often add credit insurance without the customer’s knowledge, which raises the payments by a dozen or so dollars a month.
Advice: The family breadwinner should buy enough term life insurance. It is inexpensive, and in the event of the breadwinner’s death it will not only pay off the car loan but also properly protect the family.
Payments aren’t everything
Future car owners often forget that the loan payments are only part of the costs they will have to cover. The cost of insurance is considerable, especially for a new, expensive vehicle and for a novice driver – and the higher the population density and crime rate in the area, the higher it is. Insurance can cost as much as several thousand dollars a year! And you have to be insured, because state law requires it. For a new car, minimum coverage is not enough, because we need to protect our pride and joy from theft and fender benders.
Conclusion
It pays to buy a car you can afford. Want to save? Consider a used car a few years old and pay cash. Prefer a new one you don’t have the money for? Choose a modest model and the best loan.
Updated October 2026.
