Cars may be necessary to get around, but they can be expensive.

At some point, many of us will need to finance a car. Coming up with enough cash to buy a car outright – even a used car – can be difficult. Enter the auto loan.

Financing a car isn’t all bad, especially if you follow a few best practices that can help keep your car loan in good shape. Avoiding the dreaded upside down car loan – owing more on your car than it’s worth – is the name of the game when it comes to a good automobile loan.

Why do car loans go upside down?

Being upside down on your car loan is surprisingly common. It happens to many of us, and the root cause is depreciation. Depreciation is the decline in value of a good or product over time. Many physical goods depreciate – furniture, electronics, clothing, and cars.

There is a saying that a car begins depreciating as soon as you drive it off the lot. Unlike a good such as fine art or precious stones that you would expect to appreciate over time, a car usually will lose its value over time.

For example, say you buy a new car for $25,000. After three months your car depreciates by $3,000, so it’s now worth $22,000. If your down payment was less than $3,000 or you didn’t use a down payment at all, you are now upside down – owing more money on your car than it’s actually worth.

Some cars, however, hold their value better than others. Luxury cars have a slower depreciation rate than an inexpensive compact car. The popularity of a vehicle can also affect depreciation rates.

What happens when you’re upside down on a car loan?

Being upside down on your car loan may actually not mean much unless you’re involved in a loss and your car gets totaled. Assuming you have proper auto insurance, your policy should pay out the actual cash value of your totaled vehicle, which may not be enough to pay off the remaining balance of your auto loan. Then you’re stuck paying the balance on a loan for a car that you don’t have anymore. That is why it’s essential to avoid being upside down in your car loan.

Strategies to keep your car loan healthy

Keeping your car loan right side up starts with putting a healthy down payment on your car. Typically, a 20 percent down payment may give you enough equity right off the bat to keep your car loan from going upside down when the vehicle begins depreciating. So, if you’re purchasing a $25,000 car, aim to put at least $6,000 down.

Another way to avoid being upside down on your car loan is to select the shortest repayment term possible. If you can afford it, consider a 36-month repayment plan. Your monthly payments may be a bit higher, but the chances of your loan going upside down may be less.

Choose carefully

Keeping your car loan from going upside down is important. Make sure you have a healthy down payment, shop for vehicles within your budget, and stick to the shortest repayment term you can afford. Simple strategies can help make sure your car loan stays in the black.