Calculator
Auto Loan Calculator
This calculator turns a vehicle price, down payment, trade-in, sales tax, rate, and term into a monthly car payment. It also totals the interest and the full cost so you can judge an offer before you sign.
The lowest rates are only available to the most qualified applicants.
Advertising disclosure: AutoLoanable may receive a referral fee if you apply through the link above. That fee does not change the rate you are offered, and it does not change our content. We are not a lender. Read the full disclosure.
Enter your numbers and press Calculate. Nothing you type leaves your browser.
How this calculator works
A car loan payment is built from the amount you finance, not the sticker price. The taxable amount is the price minus the trade-in, sales tax is charged on that amount, and the amount financed is the price plus tax minus the down payment and the trade-in.
The monthly payment comes from the standard amortization relationship:
Payment = P × i ÷ (1 − (1 + i)^-n)
- P — the amount financed
- i — the monthly rate, the annual rate divided by 1,200
- n — the number of monthly payments
Multiply the payment by n and subtract P to get the total interest. Total cost adds the down payment and trade-in back to every payment. A 0% loan is simply P split across n months. Enter the rate and sales tax from your own quote; this site is not a lender and does not publish rates.
What changes your result
Only a few inputs move the number materially. In rough order of impact:
| Input | Effect on the payment | Effect on total cost |
|---|---|---|
| Amount financed | Directly proportional | Directly proportional |
| Interest rate / APR | Directly proportional | Directly proportional |
| Term (months) | Lower payment when longer | Higher total interest when longer |
| Down payment | Lowers the payment | Lowers total interest |
| Trade-in equity | Lowers the amount financed | Lowers total interest |
| Sales tax and fees | Raises the amount financed | Raises total cost |
Enter the rate you were actually offered. This site is not a lender and does not publish rates — a quoted rate is only meaningful next to the term and the amount financed.