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How to Calculate Interest Rate on a Car Loan

Man Sitting at Desk Doing Calculations

If you opt to take a loan out on your next vehicle, keep in mind that you are also going to be charged interest on your monthly payments. Because of this, you may be wondering how your interest rate impacts your monthly payments and total amount owed on your vehicle. The finance experts at Suntrup Volkswagen are here to show you how to calculate interest rate on a car loan so you can better plan your budget before you shop.


What is an Interest Rate?

When learning how to calculate interest rate on a car, it is important to understand loan interest and the factors that impact it. If you purchase a car on credit, the lender owns your vehicle until you make all of the payments. The interest rate is actually like a fee you pay the lender for using their money to purchase your vehicle. Several factors could affect the amount you will have to pay in interest over time.

  • Principal Amount: The principal amount is the dollar amount you want to borrow from the lender of your choice.
  • Loan Term: Loan term is the length of time you plan to pay back the loan. If you choose shorter terms, you will have a higher monthly payment, but end up paying less in interest over time. A longer term loan has the benefit of lower monthly payments, however, you will pay more in interest over the course of the loan.
  • Repayment Schedule: Most St Peters drivers make a car payment monthly, but you may be able to make a payment more often. This reduces the amount you will pay in interest. Thanks to compounding, when you make more payments you pay less interest.
  • Repayment Amount: With every car loan payment you make, a part of that money goes to cover interest and the rest helps to repay your principal.

How to Calculate Auto Loan Interest for First Payment

Are you wondering how to calculate auto loan interest for the initial payment? This simple calculation can assist you:

  1. Divide your interest rate by the number of monthly payments you will be making for the year.
  2. Multiply it by the balance of your loan. Since it is the first payment, the balance of the loan is the entire principal amount.

How to Figure Interest on a Car Loan Going Forward

As you work to pay down your initial principal, it is necessary to calculate your new balance to determine how much you will pay in interest going forward. Here is how you can calculate the amount:

  1. Subtract the interest you just calculated from the payment you just made and this will leave you with the amount that you have paid off the loan principal.
  2. Deduct this total from your original principal to get your new loan balance.

While it may not be an entirely accurate calculation every time, knowing how to calculate the interest rate on a car loan in this way can give you a good estimate of your interest payments.

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Auto Financing is Stress-Free at Suntrup Volkswagen

While the auto financing process may seem a bit overwhelming for some Webster drivers, it doesn’t have to be when you work with the team at Suntrup Volkswagen. Our experts will guide you through the entire process and answer any questions you may have along the way. Contact us today for more information.


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