Trade-in equity
Positive equity reduces the amount financed. Negative equity is added to the new loan.
Free Auto Loan Calculator
Car Payment Calculator
Estimate the monthly car payment, amount financed, sales tax, total interest, loan cost, trade-in equity, and payoff timeline before visiting a dealer or lender.
Step 1 · Enter vehicle and loan details
Estimate the complete car payment
Include the vehicle price, down payment, trade-in balance, taxes, fees, rebate, interest rate, and term for a more realistic estimate.
What the calculator includes
See the cost behind the advertised payment.
A dealer quote can change when taxes, fees, trade-in payoff, rebates, term length, and interest are added.
Tax and fees
Estimate sales tax and decide whether it is financed or paid up front.
Long-term loan cost
Compare monthly payment, total interest, total loan cost, and payoff timing.
Method and privacy: Calculations run in the browser using a standard fixed-rate amortization formula. Entries are not sent to MegaTools.tools or saved to an account. Tax rules, fees, and lender calculations vary.
How to compare car loans
Do not judge the deal by payment alone.
Compare out-the-door price
Review the full purchase cost before focusing on monthly payment.
Test several terms
Longer terms reduce the payment but often increase total interest.
Separate the trade-in
Review trade value and payoff independently so negative equity stays visible.
Related automotive tools
Continue the vehicle cost calculation.
Common questions
Car payment calculator questions.
Does the calculator include sales tax and dealer fees?+
Yes. Enter the tax rate and combined dealer, registration, title, documentation, and other fees. Tax can be financed or paid in cash.
How is a trade-in with an existing loan handled?+
The amount owed is subtracted from trade value. Positive equity reduces the loan; negative equity is added.
Why can a dealer payment be different?+
Actual payments can differ because of APR, fees, add-ons, rebates, credit qualifications, trade payoff, payment timing, and state tax rules.
Is a 72- or 84-month loan a good idea?+
A longer term lowers the required payment but often raises total interest and can keep the balance above the vehicle value longer.
Does an extra payment reduce interest?+
When applied to principal and allowed by the lender, extra payments can reduce interest and shorten payoff time.
Does this calculator save my information?+
No account or server-side saving is built into this page. Calculations run in the browser during the current session.
Important: Results are estimates for educational, comparison, and planning purposes. Actual prices, taxes, fees, APRs, trade values, approvals, and payments vary. Review the complete financing agreement before accepting a loan.