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Auto Loan Calculator

Estimate your monthly auto loan payment.

Enter the vehicle price, down payment, trade-in, interest rate, loan term, sales tax and fees to estimate your monthly payment, amount financed and total borrowing cost.

Enter your vehicle financing details

Adjust the assumptions below to compare different vehicle and loan scenarios.

Vehicle Purchase
Used to calculate positive or negative trade equity.
Taxes & Fees
Enter the applicable sales tax percentage.
Tax treatment varies by state and transaction.
Fees entered here are assumed financed.
Loan Terms
Annual percentage rate used for this estimate.
Estimated monthly payment
$0.00
Estimated principal and interest payment based on the amount financed.
Amount financed $0
Total interest $0
Total loan payments $0
Trade equity $0
Estimated sales tax $0
Financed fees $0
Cash down payment $0
Vehicle cost before loan interest $0
Loan Cost Snapshot

Look beyond the monthly payment

Loan term and interest rate can substantially affect how much you ultimately pay.

Vehicle price $0 Purchase price before taxes, fees and financing.
Estimated amount financed $0 Estimated balance placed into the auto loan.
Estimated loan interest $0 Estimated interest over the full selected loan term.
Loan Schedule

See how your auto loan balance declines

This annual summary shows estimated principal and interest throughout the loan.

Year Beginning Balance Payments Principal Paid Interest Paid Ending Balance
Understanding Auto Financing

How an auto loan payment is calculated

A fixed-rate auto loan payment is generally based on the amount financed, annual interest rate and number of monthly payments.

Vehicle price is only one part of the calculation. Taxes, dealer fees, registration costs, trade-in equity, rebates and your down payment can all affect the amount you ultimately finance.

Down payment

A larger down payment generally reduces the amount borrowed and therefore reduces both the required monthly payment and the amount of interest that can accrue over the loan term.

Trade-in equity

Positive trade equity occurs when the trade-in value exceeds the amount still owed on that vehicle. Negative equity occurs when the outstanding loan balance is greater than the trade value.

Negative equity rolled into a new auto loan can increase the amount financed beyond the price of the replacement vehicle.

Loan term

A longer loan term can lower the monthly payment because repayment is spread over more months. However, it can also increase total interest and may leave the loan balance high relative to the vehicle's value for a longer period.

Sales tax treatment varies

Some states reduce the taxable vehicle price by qualifying trade-in value while others may treat the transaction differently. Use the tax-treatment option in the calculator based on the rules applicable to your purchase.

What this calculator considers

Amount financed ≈ vehicle price + tax + financed fees + negative trade balance − down payment − positive trade equity − rebate
✓ Vehicle purchase price
✓ Cash down payment
✓ Trade-in value and existing trade loan balance
✓ Cash rebates or incentives
✓ Estimated sales tax
✓ Dealer, registration and other financed fees
✓ Interest rate and loan term
✓ Total estimated interest and annual loan schedule

State tax rules, dealer fees, rebates and trade-in treatment vary. Use actual purchase-contract or lender figures when available.

Auto Loan Calculator FAQ

Frequently asked questions

How is an auto loan payment calculated?

A fixed-rate auto loan payment is generally calculated from the amount financed, monthly interest rate and number of monthly payments.

Does a larger down payment lower the monthly car payment?

Generally, yes. A larger down payment reduces the amount financed, which can reduce both the monthly payment and estimated total interest.

How does a trade-in affect the auto loan?

If the trade-in is worth more than the amount owed, the positive equity can reduce the amount financed. If more is owed than the trade-in is worth, the negative equity may be added to the new loan.

Does a longer auto loan term reduce the payment?

A longer term usually lowers the required monthly payment by spreading repayment over more months. However, it can increase total interest paid.

Why does the calculator ask about trade-in tax treatment?

Sales-tax rules differ by jurisdiction. In some places, qualifying trade-in value reduces the taxable vehicle price; in others, the calculation may differ.

Are dealer and registration fees included?

Yes. Enter estimated dealer, documentation, registration or similar fees in the fees field. This calculator assumes those entered fees are financed.

Why might the dealer's payment be different?

Actual payment quotes can differ because of lender-specific APRs, fees, tax rules, add-on products, rebates, trade-in calculations, payment dates and other contract details.

LoanMathWorks provides calculators and educational information for general informational purposes only. Results are estimates and should not be considered financial, lending, tax or legal advice. LoanMathWorks is not a lender or automobile dealer. Actual loan rates, taxes, fees, rebates, trade-in treatment and financing terms may vary.