Auto Loan Calculator
Calculate your monthly car payment including taxes and trade-in
Loan Details
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Enter loan details to see results
What is the Auto Loan Calculator?
An auto loan calculator tells you what your monthly car payment will be before you walk into the dealership. That matters because dealers are famous for negotiating in monthly payments rather than total price, which makes it easy to lose track of what the car actually costs. CalciHub's calculator takes the vehicle price, down payment, trade-in value, loan term, and interest rate to give you the monthly payment, total interest, and total cost of the vehicle. Know your number before you negotiate.
How Does It Work?
Auto loans use the same amortization formula as personal loans. Interest is front-loaded, meaning your early payments are mostly interest, with principal paydown accelerating toward the end of the term.
Formula: M = P × [r(1+r)^n] ÷ [(1+r)^n − 1]
M = monthly payment
P = loan amount (vehicle price minus down payment and trade-in)
r = monthly interest rate (annual rate ÷ 12)
n = number of months in the loan term
How to Use CalciHub's Auto Loan Calculator
1. Enter the vehicle price.
2. Enter your down payment amount.
3. Enter any trade-in value (the calculator subtracts it from the price automatically).
4. Enter the loan term in months (36, 48, 60, or 72 months are common).
5. Enter the annual interest rate from your lender or dealer.
6. Click Calculate to see your monthly payment and full loan cost breakdown.
Tip: Get a rate from your bank or credit union before visiting the dealership — dealer financing often carries higher rates, and having a competing offer gives you real negotiating leverage.
A Quick Example
Sarah is buying a used car listed at $24,500. She puts down $4,500 and has no trade-in. Her credit union approved a 60-month loan at 6.4%.
Vehicle price: $24,500
Down payment: $4,500
Loan amount: $20,000
Interest rate: 6.4%
Term: 60 months
Monthly payment: $389.96
Total interest paid: $3,397.60
Total cost of vehicle: $27,897.60
If Sarah stretched to a 72-month term to lower the monthly payment, it drops to $335, but she'd pay nearly $4,100 in interest and own a depreciating asset for six full years. The 60-month term is the smarter call.
Frequently Asked Questions
Most lenders offer their best rates to borrowers with scores above 720. Between 660 and 719, rates are still reasonable. Below 620, you're in subprime territory — lenders will still offer loans, but at significantly higher rates that can add thousands to the total cost. Checking and improving your score before applying is worth the effort.
Your bank or credit union first, always. Get pre-approved before you go to the dealership. Dealers can sometimes match or beat that rate, which is fine — but having a competing offer prevents them from inflating the rate without you noticing. Dealer financing is convenient, but convenience has a price.
Rarely. A 72-month car loan on a vehicle that starts depreciating the moment you drive it off the lot means you'll be underwater — owing more than the car is worth — for most of the loan. If the only way to afford a car is with a 72-month term, the car is probably too expensive for your current budget.
Most auto loans don't have prepayment penalties, so paying off early saves you on interest. Even adding $50–$100 extra to your monthly payment can shave months off the term and noticeably reduce total interest paid. Check your loan agreement first to confirm there's no penalty.
Yes, completely free. Run as many scenarios as you need – different terms, different rates, different down payments – before you step foot in a dealership.
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