Auto Loan Calculator
Calculate your monthly car payment including sales tax, down payment, trade-in value, and fees. Compare total price vs monthly payment scenarios.
Monthly Payment
$0.00
Total Loan Amount
$0.00
Sales Tax
$0.00
Upfront Payment
$0.00
Total of Payments
$0.00
Total Loan Interest
$0.00
Total Cost
$0.00
| Month | Interest | Principal | Ending Balance |
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How to Use the Auto Loan Calculator
Welcome to the Auto Loan Calculator — the complete tool for understanding the true cost of financing a vehicle. Unlike basic loan calculators, this tool factors in sales tax, down payment, trade-in value, rebates, and fees to give you the most accurate picture of your monthly payment and total loan cost. Step 1: Choose your calculation mode. "Total Price" mode calculates your monthly payment based on the car price you enter. "Monthly Payment" mode works in reverse — enter your target monthly payment, and the tool calculates the maximum car price you can afford. Step 2: Enter the vehicle and loan details. Input the auto price (negotiated price of the car), the loan term in months (12 to 84 months), and the annual interest rate. Example: For a $35,000 car with a 60-month term at 6.5% interest, enter Auto Price = 35000, Loan Term = 60, Interest Rate = 6.5. Step 3: Include additional financial factors. Enter any cash incentives or rebates from the manufacturer. Input your down payment amount. If you have a trade-in vehicle, enter its value and any amount you still owe on it. Select your state for automatic sales tax rate estimation, or enter a custom tax rate manually. Add title, registration, and other fees. Optionally check "Include taxes and fees in loan" to roll these costs into the financed amount. Step 4: Click "Calculate" to see the complete breakdown. The tool displays your monthly payment, total loan amount (including rolled-in taxes and fees), sales tax amount, upfront payment due, total payments over the loan term, total interest paid, and the total cost of the vehicle. The amortization schedule shows month-by-month details, and a donut chart visualizes principal versus interest. Pro tip: Use "Monthly Payment" mode to work backward from your budget. If you can afford $500 per month, the tool tells you the maximum car price you can shop for, helping you stay within your budget. Because this utility operates 100% client-side via JavaScript, your data is processed entirely inside your browser and is never transmitted to our servers.
What Is Auto Loan Financing?
Auto loan financing is the process of borrowing money from a lender — such as a bank, credit union, or car dealership — to purchase a vehicle. The loan is secured by the vehicle itself, meaning the lender can repossess the car if you fail to make payments. The total cost of an auto loan goes far beyond the vehicle's sticker price. Key components include the principal (the amount borrowed), the interest rate (the cost of borrowing expressed as an annual percentage), the loan term (the duration of the loan, typically 36 to 84 months), sales tax (which varies by state and may be reduced by trade-in value), down payment (money paid upfront to reduce the loan amount), trade-in value (the value of your current vehicle applied to the new purchase), and fees (title, registration, documentation fees). Understanding how these factors interact is essential for making an informed car purchase. A longer loan term reduces monthly payments but increases total interest paid. A larger down payment reduces both monthly payments and total interest. Some states allow trade-in value to reduce the taxable amount, while others do not — this tool accounts for these variations.
Common Applications
1. New car purchase: A buyer negotiating a $32,000 car with a $5,000 trade-in, $2,000 down payment, and 6% interest over 60 months uses the tool to find a monthly payment of $468 and total interest of $3,253.
2. Dealership offer comparison: A shopper receives two financing offers — one with a lower price but higher rate, another with rebates but no rate discount. The tool compares total cost to identify the better deal.
3. Budget planning: A buyer knows they can afford $450 per month. Using Monthly Payment mode, they discover they can finance up to $28,500 at current rates, which helps them narrow their car search.
4. Refinancing evaluation: A car owner with an existing 7% loan considers refinancing at 5%. By entering the remaining balance and new rate, the tool shows the potential monthly savings and total interest reduction.
5. Trade-in decision: A buyer evaluates whether to sell their old car privately (for a higher price) or trade it in (for tax savings). The tool helps compare the net financial impact of each option.
Related Utilities
Frequently Asked Questions - FAQ
Is my data safe using this tool?
Yes. All calculations are performed locally in your browser. No data is transmitted.
How is sales tax calculated?
Sales tax is calculated on the taxable amount, which may be reduced by the trade-in value depending on your state. The tax rate is either entered manually or estimated based on the selected state.
What is the difference between Total Price and Monthly Payment modes?
Total Price mode calculates your monthly payment based on the car price. Monthly Payment mode works in reverse, calculating the maximum car price you can afford based on a desired monthly payment.
Should I include taxes and fees in the loan or pay them upfront?
Including taxes and fees in the loan reduces your upfront payment but increases the loan amount, resulting in higher total interest. Paying them upfront saves on interest but requires more cash at signing. The tool shows both scenarios so you can decide.
How does trade-in value affect the deal?
Trade-in value reduces the amount you need to finance. In some states, trade-in value also reduces the taxable amount, saving you on sales tax. The tool accounts for both the equity position and the tax treatment based on your state.
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