Sep 18, 2025

How Auto Loans Work

Buying a car is a major purchase, and for most people, that means taking out a loan. Auto loans let car buyers purchase a vehicle without needing to pay the full price upfront. Instead, the lender covers most of the cost and the borrower repays it over time, with interest. 

But getting a car loan isn’t as simple as asking a lender for cash. Knowing what to expect – and what to watch out for – can help borrowers find the right auto loan without risking their finances. 

The nuts and bolts of auto loans 

Auto loans have two main financial components: the principal, or the amount the car buyer borrowed, and the interest, or the cost of borrowing money. Borrowers repay the principal, plus interest, in monthly payments. Loan lengths, known as the loan term, typically range from 36 to 72 months. 

Interest starts as a percentage of the principal. This is called the annual percentage rate (APR), and it’s influenced by several factors, such as: 

  • The borrower’s credit score: Higher credit scores usually qualify for lower interest rates. 
  • The loan term: Longer repayment periods often come with higher interest rates. 
  • The down payment: A larger down payment reduces the lender’s risk and may result in a lower rate. 
  • Current market conditions: Inflation, the economic outlook, and Federal Reserve policies all play a role in the interest rates lenders offer. 

Most auto loans use simple interest, which accrues daily based on the outstanding loan balance and APR. As the borrower pays down the principal, less interest accrues each day, meaning more of each monthly payment goes toward reducing the loan itself. 

How loan terms affect the total cost 

While monthly payments are an important factor in determining affordability, they don’t reflect the full cost of an auto loan. The loan term, interest rate, and amount borrowed all influence how much the borrower pays in the end. 

For example, longer terms typically have lower monthly payments but increase the total interest paid over time. That’s why borrowers need to weigh what fits their monthly budget against the benefit of paying less overall. 

Where to get an auto loan 

Banks, credit unions, dealerships, and online lenders all offer auto loans. Each option has its advantages. 

Working directly with a lender like a bank or credit union, known as direct financing, gives borrowers the chance to compare loan offers. Direct loans usually come with competitive rates, and borrowers can get preapproved. This may strengthen their position during price negotiations. 

With indirect financing, the dealer acts as an intermediary between the borrower and the lender. Indirect financing may be a good option for car buyers with lower credit scores because dealers often work with lenders that specialize in subprime financing. However, dealer-arranged loans usually come with higher interest rates and fewer opportunities to shop around. 

Online lenders may offer direct or indirect financing. Rates can be competitive, partly because many online lenders operate without brick-and-mortar locations and may pass the savings on to borrowers. 

Pro tip: Buying a car from a private party requires direct financing. Some lenders may offer auto loans designed for private party sales, while others might offer a personal loan instead. 

Risks to be aware of 

Borrowing money comes with a certain level of risk. For an auto loan, some of the biggest concerns for borrowers include: 

  • Overbuying. Easy financing can make a vehicle seem more affordable than it actually is.  
  • Depreciation. A new car loses value quickly, which could lead to owing more than the car is worth. If the vehicle is totaled or stolen before the loan is paid off, the borrower may still owe the balance. 
  • Required insurance. Most lenders require collision and comprehensive coverage, in addition to the liability insurance mandated by most states. This extra expense isn’t included in the auto loan itself, but it does increase the cost of financing a car. 
  • Default. Missing payments could lead to vehicle repossession, while also hurting the borrower’s credit. 

Knowing the potential downsides helps car buyers avoid costly mistakes. 

Final thoughts on auto loans 

The right loan makes car ownership possible, but borrowers must approach financing with a solid understanding of how auto loans work. That way, they can choose a loan that fits their needs without putting their financial well-being at risk. 

Sources 

https://www.investopedia.com/articles/personal-finance/061615/how-interest-rates-work-car-loans.asp  

https://www.consumerfinance.gov/ask-cfpb/what-is-the-difference-between-dealer-arranged-and-bank-financing-en-759/ 

https://www.experian.com/blogs/ask-experian/is-it-better-to-finance-a-car-through-a-bank-or-dealership/  

https://www.experian.com/blogs/ask-experian/should-you-get-online-auto-loan/ 

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