Most people negotiate hard on the price of a car and then sign the financing paperwork without asking a single question about it. That is backwards. The loan is where a large share of the dealership’s profit lives, and it is the part of the transaction with the most moving pieces that a buyer can influence.
Between the moment you say yes to a car and the moment you start making payments, several things happen that never get explained to you.
Two different ways to borrow
There are two paths to a car loan, and they work differently.
Direct lending means you go to a bank, credit union, or online lender yourself, get approved, and arrive at the dealership with financing already arranged. The lender pays the dealer, you repay the lender, and the dealership’s only role is selling you the car.
Indirect lending is what happens in the finance office. The dealer takes your credit application and submits it to a group of lenders it works with. Those lenders send back approvals. The dealer then presents you with a rate and a payment. The Consumer Financial Protection Bureau describes both routes in its guide to auto loan shopping, and the distinction matters because of what happens in the middle of the indirect version.
Captive lenders sit inside the indirect world but deserve their own mention. These are the financing arms owned by the automakers, such as Ford Credit or Toyota Financial Services. They finance new and certified preowned vehicles from their own brand’s franchise dealers, and they are the source of the subsidized promotional offers you see advertised, the 1.9 percent for 48 months type of deal. Those rates are real, but they usually require top-tier credit and often come as an alternative to a cash rebate rather than in addition to it.
The buy rate and the markup on top of it
When a lender approves your application through a dealer, it quotes what the industry calls a buy rate. That is the rate the lender will accept based on your credit profile, the loan amount, the term, and the vehicle. It is the wholesale price of the money.
The dealer is generally permitted to present you with a higher rate than the buy rate and keep a share of the difference. This compensation is known as dealer reserve or dealer participation. The markup is commonly one to two percentage points, and lender agreements often cap it around two or three.
The cost adds up quietly because it is buried in a monthly payment. On a $40,000 loan over 60 months, a one point markup adds roughly $1,000 in interest over the life of the loan. Two points roughly doubles that. Nothing about your car changed. You simply paid more for the borrowing.
This is legal and disclosed in the sense that the rate you sign is the rate you agreed to. What is not disclosed is the buy rate underneath it. You cannot see the wholesale number, which is why the practical defense is to get your own approval from a credit union or bank before you shop. Once you have a competing offer in hand, you can ask the dealer to beat it. If the dealer can beat it, you win. If it cannot, you already have financing.
What determines your rate
Credit score does most of the work. NerdWallet’s tracking of average car loan rates by credit tier shows the spread between the best and worst tiers running well over ten percentage points on used vehicles, which is a bigger swing than most people expect.
Loan type matters almost as much. Edmunds put the average rate on a new car loan at about 7 percent APR in July 2026 and the average used car rate at 10.6 percent. Used vehicles cost more to finance because they depreciate unpredictably and are harder for a lender to recover value from in a default.
Term length, down payment, and the age and mileage of the vehicle round out the picture. Longer terms usually carry higher rates, and lenders often cap the term based on the model year.
Why the 84-month loan became normal
A record 22.9 percent of financed new-car purchases in the first quarter of 2026 involved loans of at least 84 months, up from 21.2 percent a year earlier, according to Edmunds data reported by CNBC. Seven-year car loans used to be a fringe product. They are now close to one in four new car transactions.
The math explains the appeal and the problem at the same time. A $43,899 loan at 6.9 percent over 84 months produces a monthly payment of about $660 and costs roughly $11,575 in interest across the full term. The same loan over 60 months would have a payment several hundred dollars higher and cost thousands less in total. Buyers are choosing the payment they can fit into a monthly budget, and the lender is happy to sell them more months to get there.
The catch is that the car depreciates faster than the loan balance falls. Loan amortization is front-loaded toward interest, so in the early years you are paying down principal slowly while the vehicle loses value quickly. Stretch the term and that gap stays open longer.
Negative equity and the loan that follows you
When you owe more on a car than it is worth, you have negative equity, sometimes called being underwater or upside down. This is not a rare condition anymore. Edmunds reported that roughly 31 percent of trade-ins in early 2026 carried negative equity, with an average shortfall around $7,183.
What happens next is where it gets expensive. If you trade in an underwater car, the dealer typically rolls the shortfall into the new loan. You are now borrowing the price of the new car plus the leftover balance on a car you no longer own. About 40.7 percent of new-vehicle purchases involving negative equity get financed with 84-month loans, which is how a person ends up seven years into payments with a five-year-old car and a balance that never quite makes sense.
Negative equity also complicates insurance. If the car is totaled, standard auto coverage pays the actual cash value of the vehicle, not your loan balance, and you owe the difference. Gap coverage exists for this reason, and it is usually cheaper through your own insurer than through the dealership.
The broader stress in the market
Auto lending is under real strain in 2026. Subprime borrowers hit their highest 60-day delinquency rate in more than three decades earlier this year, with the rate reaching roughly 6.8 percent. That reflects the combination of high vehicle prices, elevated rates, and long terms that leave borrowers with little cushion.
For an individual borrower, the takeaway is not to panic about the market. It is that lenders are tightening, which makes preapproval more valuable and makes the size of your down payment matter more than it did a few years ago.
What to do with all of this
Get a preapproval from a credit union or bank before you walk into a dealership, so you know your real rate. Negotiate the price of the car and the financing as separate conversations, not as a single monthly payment. Put down enough that you are not underwater from day one, which usually means somewhere around 20 percent on a new vehicle. Keep the term as short as the payment allows, because the extra months are not free even when they feel like it.
The finance office is the last room in the building, when you are tired and ready to be done. That is not an accident. Knowing what a buy rate is before you sit down changes the conversation.