Auto Loan Calculator
Estimate your monthly car payment, APR, taxes, trade-in impact, down payment, and extra payments — a free, U.S.-friendly car loan calculator built for global users.
Enter vehicle price → find your monthly payment
Loan Details
See your monthly payment, total interest, payoff timeline, and the true vehicle cost.
What is an Auto Loan?
An auto loan is a secured installment loan that lets you finance a vehicle purchase over time. You borrow the purchase price (minus your down payment and trade-in), then repay it in fixed monthly installments over a set term — typically 24 to 84 months — at a fixed annual interest rate. Unlike a general-purpose personal loan, an auto loan is tied to the vehicle, which keeps APR lower for most borrowers.
The vehicle itself serves as collateral. This keeps rates lower than unsecured personal loans, but it also means the lender can repossess the car if you miss payments. Understanding the full cost — principal, interest, taxes, and fees — before you sign is the most important step in car buying. If you also need to model the home-equity side of your finances, our mortgage calculator covers the same fundamentals for residential lending.
How Car Loans Work
You pick a car & price
The sticker price minus any cash incentives or trade-in equity is your starting vehicle cost.
Down payment & trade-in reduce loan
Whatever you pay upfront — cash down plus net trade-in value — is subtracted from what you need to finance.
Tax & fees may add to the loan
Sales tax, title, and registration can be paid at signing or rolled into the loan (at extra interest cost).
You repay in monthly installments
Using the standard amortization formula, each payment covers that month's interest first, then chips away at the principal.
How We Calculate Your Car Payment
This calculator uses the standard loan-amortization formula every U.S. bank, credit union, and captive auto lender applies to fixed-rate installment loans. It is the same equation that underpins our general loan calculator and mortgage calculator:
M
Monthly Car Payment
P
Loan Amount (after down payment + trade-in)
r
APR ÷ 12 (decimal)
n
Number of Months
How the inputs flow into the result
- 1.Loan Amount (P) = Vehicle Price − Cash Incentives − Down Payment − Net Trade-In Equity. If you elect to roll taxes and fees into the loan, sales tax and title/registration are added to P.
- 2.Periodic Rate (r) = APR ÷ 12. So a 6.5% APR becomes 0.005417 per month. Every U.S. auto lender quotes APR as a yearly figure; the math runs monthly.
- 3.Term (n) = loan term in months. Common U.S. terms are 36, 48, 60, 72, and 84. Longer terms lower M but raise total interest paid significantly.
- 4.Extra Monthly Payment is added on top of M in each period and applied 100% to principal in our simulation — the same way most U.S. lenders treat principal-curtailment payments.
- 5.Sales tax is computed on the vehicle price (post-trade-in in most states, pre-trade-in in a handful). Title and registration fees are flat add-ons.
Worked example
For a long-horizon view of how interest compounds against you on any loan, see our compound interest calculator.
Rate ranges reviewed against the Federal Reserve G.19 consumer-credit release and current Edmunds average-APR reports. Methodology reviewed by an Accredited Financial Counselor (AFC®). See our methodology and editorial policy for full sourcing.
How to Lower Your Monthly Car Payment
✓ Increase your down payment
Every extra dollar down reduces the principal. On a 7% loan, putting down $2,000 more saves you nearly $400 in interest over 60 months.
✓ Shorten the loan term
Shorter terms mean higher monthly payments but much less total interest. A 48-month loan vs 72-month can save thousands on the same car.
✓ Improve your credit score
Even moving from 'fair' to 'good' credit can drop your APR by 2–4%. That's hundreds of dollars over the life of the loan.
✓ Shop multiple lenders
Banks, credit unions, and online lenders often beat dealer financing. Getting pre-approved gives you negotiating power.
✓ Negotiate the vehicle price first
Always agree on the vehicle price before discussing financing. Dealers can manipulate monthly-payment math to hide a bad rate.
✓ Make extra payments
Any extra payment goes straight to principal. Use the Extra Payment field in the calculator above to see exactly how much time and interest you'd save.
Should You Take a Long-Term Loan?
Long-term loans (72–84 months) are tempting because of the lower monthly payment, but they come with serious hidden costs. You pay significantly more interest overall, and you risk being "upside down" — owing more than the car is worth — for the first 2–3 years as the vehicle depreciates faster than you pay down the principal.
✓ Short term (36–48 months)
- • Less total interest paid
- • Build equity faster
- • Better for used cars (shorter useful life)
⚠ Long term (72–84 months)
- • Much higher total interest cost
- • Negative equity risk for years
- • Tied to a depreciating asset longer
Common Mistakes to Avoid
Focusing only on the monthly payment
A lower payment over more months almost always means paying more overall. Always check the total cost column in the comparison table.
Rolling taxes & fees into the loan
While it preserves cash upfront, you pay interest on those fees for years. If you can afford it, pay them at signing.
Forgetting about negative equity on trade-in
If you owe more on your trade-in than it's worth, that gap gets added to your new loan — starting you underwater on day one.
Accepting the dealer's financing without shopping
Dealer financing can be convenient but often carries a markup. A pre-approved offer from a credit union gives you a real baseline.
Frequently Asked Questions
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