Car Loan Interest Calculator

When financing a car, the sticker price is just the starting point — the Car Loan Interest Calculator shows you exactly how much interest and fees add to what you actually pay. Enter your vehicle price, down payment, interest rate, and loan term to get your monthly payment and total interest cost. You can also add trade-in value, sales tax rate, and title and registration fees to see your full total loan amount and total cost.

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Frequently Asked Questions

How is car loan interest calculated?

Car loan interest is calculated on the remaining loan balance each month. Early payments go mostly toward interest, while later payments pay more principal. The total interest depends on your loan amount, interest rate, and term length.

What factors affect my car loan interest rate?

Your credit score, loan term, down payment amount, and whether you're buying new or used all affect your interest rate. Higher credit scores and larger down payments typically result in lower rates.

Should I include taxes and fees in my loan?

Including taxes and fees in your loan means higher monthly payments and more total interest paid. However, it requires less cash upfront. Consider your available cash and long-term financial goals when deciding.

How does loan term length affect total interest?

Longer loan terms mean lower monthly payments but significantly more total interest paid over the life of the loan. A 72-month loan typically costs thousands more in interest than a 48-month loan for the same amount.

What's the benefit of making a larger down payment?

A larger down payment reduces your loan amount, monthly payment, and total interest paid. It also helps you avoid being upside down on your loan and may qualify you for better interest rates.

How does a trade-in affect my car loan calculation?

Your trade-in value reduces the amount you need to finance, but any remaining balance owed on your trade-in gets added to your new loan. The net trade-in value (value minus what you owe) is what actually helps reduce your loan.

Can I pay off my car loan early to save on interest?

Yes, making extra payments toward principal or paying off early can save thousands in interest. Most auto loans don't have prepayment penalties, but check your loan terms to be sure.