Auto Loan Payment Estimator
The Auto Loan Calculator shows the real monthly payment on a car purchase, not just the sticker price divided by months. Enter the vehicle price, down payment, trade-in value, sales tax, fees, interest rate, and loan term to see your loan amount, monthly payment, total interest, and the true out-the-door cost of the vehicle.
Auto Loan Payment Estimator
Sales tax and fees vary by location — check your local rate for an accurate estimate. Leave optional fields at 0 if not applicable.
| Vehicle Price * | Down Payment |
| Trade-In Value | Sales Tax Rate (%) |
| Title, Registration & Doc Fees | Interest Rate / APR (%) * |
| Loan Term (months) * | |
Sales Tax
Sales Tax = Taxable Amount × Tax Rate
Many jurisdictions only tax the vehicle price after subtracting the trade-in value, since the trade-in is treated as a credit rather than income — but rules vary by location, so confirm your local treatment.
Amount Financed
Monthly Payment
Where P is the amount financed, r is the monthly interest rate (APR ÷ 12), and n is the loan term in months.
Out-the-Door Price
This is the total price before financing is applied — what you’d pay in full if buying with cash, before any trade-in credit or down payment.
Common Uses for This Calculator
- Budgeting before a purchase: Know your monthly payment before you’re at the dealership
- Comparing loan offers: Test different rates or terms from different lenders side by side
- Trade-in decisions: See how much a trade-in actually reduces your financed amount
- Term length trade-offs: Compare a shorter term’s higher payment against a longer term’s extra interest
- Negotiating leverage: Know your target out-the-door price before negotiating with a dealer
Worked Example: Same Car, Two Loan Terms
Say you’re buying a 32,000 vehicle, putting 3,000 down and trading in a car worth 5,000, in an area with 7% sales tax and 500 in title/doc fees, financed at 6.5% APR.
Sales tax = 27,000 × 7% = 1,890
Out-the-door price = 32,000 + 1,890 + 500 = 34,390
Loan amount = 34,390 − 3,000 − 5,000 = 26,390
Over a 60-month term, that loan amount comes to roughly 516/month, with about 4,570 in total interest. Stretched to 72 months instead, the payment drops to around 449/month — but total interest rises to about 5,930, meaning the “cheaper” monthly payment actually costs an extra 1,360 over the life of the loan. Running both terms through this calculator side by side makes that trade-off concrete before you sign anything.
Frequently Asked Questions
Does trade-in value reduce sales tax?
In many places, yes — sales tax is calculated on the vehicle price minus the trade-in value, effectively treating the trade-in as a tax-free credit. Some jurisdictions don’t allow this, so check local rules.
Should I include fees in the amount financed?
You can choose either way in practice: rolling fees into the loan means financing them (and paying interest on them), while paying them upfront at signing keeps your loan amount — and total interest — lower.
Why does a longer loan term cost more even with a lower payment?
A longer term spreads the same principal over more months, which lowers each payment, but you pay interest for a longer period overall — so total interest paid over the life of the loan increases.
What’s a typical auto loan interest rate?
Rates vary widely based on credit score, loan term, new vs. used vehicle, and lender — shop multiple lenders and use your actual quoted APR for the most accurate estimate.
Does this include GAP insurance or extended warranties?
No. If you plan to finance add-ons like GAP insurance or an extended warranty, add their cost to the vehicle price field to include them in the amount financed.
Tips
- Use your actual local sales tax rate: it varies significantly by location
- Confirm your real APR: advertised rates often require excellent credit
- Compare total interest, not just payment: a lower monthly payment can mean a higher total cost
Understanding Auto Loan Payments
An auto loan payment depends on more than just the sticker price and the interest rate — sales tax, fees, your down payment, and any trade-in value all shift the actual amount financed before the loan math even begins. Two buyers looking at the identical vehicle price can end up with very different loan amounts and payments depending on these factors alone.
Loan term is the other major lever: stretching payments over more months lowers the monthly amount but increases total interest paid, since the balance accrues interest for longer. Comparing a few different term lengths side by side — rather than fixating on the lowest monthly payment — is usually the clearest way to see the true cost trade-off before signing a loan.
Who Uses This Calculator
Car buyers budgeting before a purchase, anyone comparing financing offers from different lenders or dealers, and buyers weighing a trade-in against selling privately can use this tool to see the full cost picture. It is for estimation and planning; always confirm your exact rate, tax treatment, and fees with the dealer or lender before signing.
About This Calculator
This auto loan estimator calculates your amount financed, monthly payment, total interest, and out-the-door price from the vehicle price, down payment, trade-in, sales tax, fees, rate, and term. It is intended for car buyers budgeting or comparing financing offers. Figures are estimates for planning purposes only — always confirm your exact rate, tax rate, and fees with your dealer or lender before signing a loan agreement.