How to Know If You Can Afford a Car Loan

Teens 13–17 · How-to · Updated October 1, 2026 · LearnLife Editorial

What Do You Need Before Starting to Decide If You Can Afford a Car Loan?

Before you start thinking about buying a car with a loan, it’s important to gather a few key pieces of information. First, know exactly how much money you make or receive regularly—this could be from a part-time job, allowance, or help from family. Make a list of your current monthly expenses such as phone bills, entertainment, food, and any other costs you regularly pay. Knowing this helps you understand how much money you have left each month.

Next, research the extra costs that come with owning a car besides the loan payment. These include gas, insurance, repairs, maintenance like oil changes and tire rotations, and registration fees. These expenses can add up quickly, so it’s important to have a clear idea of what they might be.

Also, if you can, find out your credit score. This number affects whether lenders will approve you for a loan and what interest rate you’ll get. Teens often don’t have extensive credit history, so you might need a co-signer like a parent or guardian to help you qualify.

Finally, think about how long you plan to keep the car. A longer loan term means smaller monthly payments but usually ends up costing more in interest. Having all this information will give you a clearer picture of what you can afford and help you avoid surprises later.

How Do You Calculate the Monthly Payment You Can Afford?

Once you know your income and expenses, it’s time to figure out how much you can afford to pay each month for a car loan and all related costs. A simple guideline is to spend no more than 15% of your monthly income on all car expenses combined. For example, if your monthly income is $400, try to keep your total car spending around $60.

To calculate this, start by listing your monthly income. Then subtract your regular expenses to find your “disposable income,” the money left for extras like a car. Next, estimate monthly car costs:

• Loan payment (based on the price of the car, interest rate, and loan length)
• Insurance premiums (you can ask insurance companies for quotes)
• Gas costs (estimate how much you’ll drive; multiply miles by your car’s miles per gallon and local gas prices)
• Maintenance and repairs (set aside a monthly amount for oil changes, tire replacement, and unexpected repairs)
• Registration and taxes (divide the annual fees by 12 to get a monthly amount)

Using an online car loan calculator, plug in different car prices, loan terms (like 36 or 48 months), and interest rates to see what your monthly payments might be. Pick amounts that, when added to the other car expenses, fit within your budget.

What Are the Step-by-Step Actions to Know If You Can Afford a Car Loan?

1. Write down your total monthly income. This includes paychecks, allowance, or any money you regularly get.
2. Make a list of your current monthly expenses. Include everything from phone bills to snacks.
3. Calculate your disposable income. Subtract your expenses from your income to find how much free money you have.
4. Research all car-related costs. Contact insurance companies for quotes, check gas prices, and estimate maintenance costs.
5. Decide on a maximum monthly car budget. Use around 15% of your income as a rough limit for all car expenses.
6. Use a car loan calculator online. Enter different car prices, loan lengths, and interest rates to see estimated payments.
7. Check your credit score. Ask a parent or guardian to help if you don’t know how.
8. Discuss loan options with lenders or banks. Ask for pre-approval to learn what loan amounts and interest rates you qualify for.
9. Compare the loan payments plus other car costs to your budget. Make sure it fits comfortably without sacrificing essentials.
10. Ask yourself if you can still afford your other needs. Food, fun, saving money, and emergencies should not be pushed aside.

Each step helps prevent borrowing more than you can pay back and keeps you on track to enjoy your car without stress.

How Will You Know It Worked?

You’ll know your plan worked if after adding the car loan and costs into your budget, you still have enough money for all your other expenses and some savings. Paying the car loan on time every month without skipping payments or struggling is a good sign. Also, if you can afford gas and keep your insurance current without cutting back on essentials like food or school supplies, that means you’ve chosen a loan you can handle.

If you get pre-approved for a loan with payments within your budget, that’s a strong indicator you can afford the loan. Conversely, if you find yourself worrying about money or having to borrow from others frequently, those are warning signs.

By reviewing your budget regularly and adjusting if needed, you can keep your finances in good shape. If you find it hard to keep up, it’s time to rethink your expenses or loan choice.

What Should You Do When It Goes Wrong?

Even with careful planning, sometimes things don’t go as expected. If you miss a car loan payment, don’t ignore it. Contact your lender right away and explain your situation. Many lenders have programs to help if you’re having trouble, such as temporarily lowering payments or extending your loan term.

If your car expenses are higher than expected or you lose income, look for ways to cut costs. For example, driving less can save on gas, and shopping around for cheaper insurance can reduce premiums. You might also want to delay some maintenance if it’s not urgent, but don’t skip safety-related repairs.

If the loan really becomes unmanageable, talk to your parents, a trusted adult, or a financial counselor. They can help you understand your options, which may include selling the car or trading it for a less expensive one.

The key is to act quickly rather than letting money problems build up, which can hurt your credit score and cause stress.

How Can Teens Adapt This Process to Their Situation?

As a teen, you might have less steady income and limited credit history, so it’s important to be extra honest about what you can afford. If you have a part-time job, count only the money you know you’ll keep getting regularly. If family members help with expenses, include that support in your budget but don’t rely on it entirely.

Since lenders often require borrowers to be 18 or older with good credit, you may need a co-signer. This is usually a parent or guardian who agrees to pay if you can’t. Make sure both you and your co-signer understand the loan terms and responsibilities before signing anything.

Start by looking for used cars that cost less and have lower monthly payments. This helps you build credit and learn about car ownership without a big financial risk.

Talking with your parents or a trusted adult throughout the process can help you make safe and informed choices. Use this experience to build good money habits that will help you in the future.

What Other Costs Should You Include When Budgeting for a Car Loan?

It’s easy to focus only on the loan payment, but full car ownership comes with many additional expenses. Insurance is often the largest extra cost, especially for young drivers. Insurance companies calculate premiums based on your age, driving history, and the type of car, so ask for quotes from several companies to find the best price.

Gas prices fluctuate, so estimate your monthly fuel expenses based on how far you plan to drive and your car’s fuel efficiency. For example, if your car gets 25 miles per gallon and you drive 300 miles a month, you’ll need about 12 gallons. Multiply that by current gas prices to get your monthly fuel cost.

Maintenance and repairs are also important. Budget for routine services like oil changes, tire rotations, and brake checks, plus unexpected repairs. A safe estimate is setting aside $50 to $100 monthly, depending on the car’s age and condition.

Registration fees and taxes are annual but should be divided by 12 and included as monthly costs. This prevents surprises when these bills come due.

By considering all these costs, you’ll have a realistic picture of how much owning a car will really cost and avoid financial strain.

How Does Your Credit Affect Your Ability to Get and Afford a Car Loan?

A credit score tells lenders how responsible you’ve been with borrowing money in the past. If your score is high, lenders see you as less risky and may offer loans with lower interest rates, which means lower monthly payments.

Since many teens don’t have much credit history, you might find it harder to get a loan on your own or get one with a high interest rate. This makes the loan more expensive. To improve your credit, consider using a secured credit card responsibly or paying bills on time if you have any.

If you need a co-signer, remember that their credit score and income will be part of the loan approval process. This can help you get better loan terms, but it also means your co-signer is responsible if you don’t pay.

Knowing your credit situation before applying helps you choose realistic loan options and avoid payments you can’t afford.

Frequently asked questions

Can I get a car loan if I’m under 18?

Most lenders require borrowers to be at least 18 years old to sign a loan contract. If you’re younger, you usually need a parent or guardian to co-sign the loan. This means they agree to pay if you can’t, which helps lenders approve your loan.

What happens if I miss a car loan payment?

Missing a payment can lead to late fees, hurt your credit score, and if repeated, the lender may repossess the car. If you’re struggling to pay, contact your lender quickly to ask about options like payment deferral or a revised plan.

Should I buy a new or used car with a loan?

Used cars typically cost less and have lower monthly payments, making them easier to afford. New cars may come with warranties but are more expensive. Consider your budget and loan affordability before deciding.

How much should I put down as a down payment for a car?

Putting down 10-20% of the car’s price upfront reduces the loan amount and monthly payments. A larger down payment also lowers the total interest paid over the life of the loan.

Can I pay off my car loan early?

Many loans allow early payoff without penalties, which can save you money on interest. Check your loan agreement to be sure. Making extra payments or paying off the loan early shortens the loan term.