Auto Loan Calculator

Estimate your monthly car payment with sales tax, trade-in, down payment and interest.

Reviewed by the WorldCalcs team · Methodology · Last reviewed: June 2026

Vehicle priceDown paymentTrade-in valueSales tax (%)Annual interest rate (%)Loan term (months)

Monthly payment

605.95

Amount financed

30 240.00

Sales tax

2 240.00

Total interest

6 116.85

Total of payments

36 356.85

Sales tax is applied to (vehicle price − trade-in); adjust if your region taxes differently.

What is an auto loan calculator?

An auto loan calculator estimates the monthly payment on a car loan, taking into account the vehicle price, your down payment, any trade-in value and sales tax.

How it's calculated

Sales tax = (vehicle price − trade-in) × tax rate. Amount financed = vehicle price + sales tax − down payment − trade-in. Monthly payment = financed × i × (1 + i)^n ÷ ((1 + i)^n − 1), where i is the monthly rate (annual rate ÷ 12 ÷ 100) and n is the term in months.

Example

A 35 000 car with 5 000 down, an 8 000 trade-in and 7% sales tax, financed at 5% over 60 months: sales tax is 1 890, the amount financed is 23 890, and the monthly payment is about 450.83, with 3 160.03 total interest.

All calculations happen in your browser. Nothing is sent, stored, or tracked.

Results are estimates and may contain errors — for general information only, not professional advice. Always verify before relying on them. Disclaimer

How to use

Enter the vehicle price, your down payment, any trade-in value, your local sales tax rate, the interest rate and the loan term in months. Results update as you type.

Amount financed = vehicle price + sales tax − down payment − trade-in. The monthly payment uses the standard amortizing formula.

Leave trade-in or sales tax at 0 if they don't apply to you.

Frequently asked questions

How is the car payment calculated?+

From the amount financed (price plus tax, minus down payment and trade-in) using the standard amortization formula.

How does a trade-in reduce my loan?+

Its value is subtracted from the amount you finance, and in many regions it also lowers the taxable amount.

Is sales tax applied before or after the trade-in?+

This tool applies tax to the price minus the trade-in; rules vary by region, so adjust if yours differs.

Should I choose a longer loan term?+

A longer term lowers the monthly payment but raises total interest and the risk of owing more than the car is worth.

Does this include registration or dealer fees?+

No — add those separately when budgeting.

Does it work for any currency?+

Yes — figures are in whatever currency you enter.