Finding yourself with a bit of extra cash is a great feeling. Maybe you landed a raise or a promotion at work, put in a few extra hours on a side hustle, or spent a weekend helping a friend or family member move. When that unexpected money hits your account, it’s good to pay down debt when and where you can, and your vehicle is a good place to start.
Even a modest amount of extra money, like something in the $500 neighborhood, can impact your car loan in ways you might not expect. Putting that money toward the principal reduces the total interest you pay and accelerates your payoff date. While it’s always a good idea to pay down all types of debt, the quicker the timeline for paying off your car loan, the better.
To better understand how even a smaller amount like $500 is so effective, let’s look at the mechanics of the loan itself.
How your car loan actually works
Most auto loans today are structured as simple interest loans. This means the interest is calculated daily based on the remaining balance (the principal) you owe. Longer terms, like 72 or 84 months, offer lower payments, but they also allow interest to accumulate for longer. The risk of negative equity with these longer terms is higher, where the remaining balance of the loan is more than what the vehicle is worth.
The reason a principal-only payment is a good way to hammer down debt is that it bypasses the interest calculation entirely for that portion of the loan. Let’s look at a common scenario. Suppose you have a $30,000 loan at a 7% interest rate (near the current national average) with a 60-month term.
Your monthly payment is roughly $594. Over the full five years, you would pay a total of $5,642 in interest. If you take that $500 you earned from your side hustle and apply it directly to the principal in the first year:
- You save roughly $150 in interest: That $500 is no longer part of the balance, so the bank can never charge you interest on it again.
- You shorten the loan: You effectively “delete” about one month of payments from the end of your term.
You can also use your tax refund towards your car, which, when applied to your loan, can have a surprising effect. According to the latest IRS data, the average refund for the 2026 filing season has been around $3,500. Let’s use the same hypothetical loan as before, but applying the average U.S. tax refund to the principal of $3,500:
- Total Interest Saved: Roughly $1,050 in total interest charges over the life of the loan.
- Time Saved: You will cut about seven months off your repayment schedule.
When you apply extra money to your car loan, make sure to specify to your lender that the money should be applied to the principal, not just the next month’s scheduled payment.
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What to look for with a new vehicle loan
Leasing can be the better option for some
If you are currently in the market for a new car, the loan structure is just as important as the sticker price. Here are a few things to keep in mind:
- Check for Prepayment Penalties: Before you sign, make sure your loan allows you to pay it off early without fees. You want the freedom to throw extra cash at the principal whenever you have it.
- Watch the Term Length: As noted a moment ago, a term of 72 or 84 months will give you a lower payment, but be careful. Any and all longer loans have risks, including the risk of negative equity if you are a high-mileage driver.
- Know When to Lease: Sometimes, buying isn’t the right move. If you like having a new car every few years and don’t want to worry about long-term debt or maintenance, leasing a vehicle might make more sense for your specific situation.
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The Baseus Prime Trip VD1 Pro dash cam system features a 4K front camera and an HD rear camera. Thanks to a solar panel and battery, it’s able to monitor your parked vehicle without hardwiring.
Get caught up with routine maintenance or buy a new accessory
If your vehicle is already paid off, use that extra $500 to keep it running. Instead of cosmetic upgrades, use it for routine service work. Consider replacing the fluids in the major systems, such as the transmission, brakes, or coolant. Replacing the original (or aging) fluid in these systems can help prevent costly repairs later.
If your tires are past their usable life (4/32 tread depth), put any extra money earned toward a new set. Likewise, if your brake pads are worn down past their usable life (three to four millimeters), putting any extra money you earn toward a new set is a great investment.
And finally, if you want to treat yourself to a fun gadget, there are a few upgrades that can make your daily commute more enjoyable. If you’re still plugging in your phone, a wireless CarPlay or Android Auto dongle can make your morning drive more convenient. Consider a 4K dash cam, many of which are quick DIY installs that will protect you from hit-and-run drivers.
Whether you choose to get ahead on your loan, replace your tires or brakes, or get a dash cam for your windshield, you can ensure your car remains a reliable asset for your daily commute rather than a financial burden. By making intentional choices with even small amounts of extra money, you may be able to gain a little more breathing room in your monthly budget.
Stephan is the sports journalist for the Maple Grove Report.
