Auto Loan Calculator
Calculate your car loan payment. Enter vehicle price, down payment, trade-in value, loan term (24-84 months), interest rate, and sales tax. See loan amount, monthly payment, total interest, and total cost. 100% browser-based, no signup.
| Month | Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 1 | $450.02 | $124.58 | $325.44 | $22,674.56 |
| 2 | $450.02 | $122.82 | $327.20 | $22,347.36 |
| 3 | $450.02 | $121.05 | $328.97 | $22,018.39 |
Early payments are mostly interest; later payments are mostly principal. Over the 60-month term, total of payments = $27,001.28.
Trade-In & Tax
Account for trade-in value and state sales tax. Most states tax on (price − trade-in), so reducing your taxable basis with a trade-in can lower your up-front cash needed.
Monthly Payment
Standard amortization formula M = P × r(1+r)^n / ((1+r)^n − 1) computes the exact monthly payment for any auto-loan term from 24 to 84 months.
Total Interest
See exactly how much interest you will pay over the life of the loan — useful for comparing 36 vs 60 vs 72 month terms or different APR offers.
Amortization Sample
A 3-month preview shows how each payment splits between interest and principal, plus your declining loan balance in the first months.
How is the loan amount calculated?
Loan amount = vehicle price − down payment − trade-in value. Sales tax is computed separately and assumed to be paid up-front (not financed in the loan). Most US states tax on (price − trade-in), which the calculator follows.
How is the monthly payment calculated?
Using the standard fixed-rate amortization formula: M = P × r(1+r)^n / ((1+r)^n − 1), where P is the loan amount, r is the monthly interest rate (annual rate ÷ 12), and n is the loan term in months.
What does "Total Cost" include?
Total Cost = vehicle price + total interest − down payment. It represents the all-in cost of the car over the life of the loan, excluding sales tax (which you pay up-front). Use it to compare the true cost of longer vs shorter terms.
Should I take a 60 or 72 month loan?
Shorter terms have higher monthly payments but much lower total interest. Use the calculator to compare: a 60-month vs 72-month loan at the same rate shows you exactly how much extra interest the longer term costs.
Is my financial information private?
Yes. All calculations run entirely in your browser using JavaScript. Your vehicle price, down payment, and trade-in value never leave your device — no signup, no server, no tracking.
Ready to use the Auto Loan Calculator?
Free, no signup, no watermark. 100% browser-based. Your data never leaves your device.
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