Car Payment Calculator

The payment on the sticker is not the payment on the note

A $35,000 car is not a $35,000 loan. Down payment, trade-in, and sales tax move the amount financed before interest even starts. This car payment calculator is built for that OTD stack, which is why it is a different page from the generic loan calculator.

Dealers sell term. A 72-month quote looks cheaper than 48 months on the same car. The interest line on this page is how you catch that. If total interest jumps more than you like, shorten the term or raise cash down—not the other way around.

How the numbers are built

Taxable amount is price minus trade-in, then times your sales-tax rate. Amount financed is price − down − trade-in + tax. Payment uses the same amortization formula as the loan page. Total repaid is payment times months. Interest is that total minus amount financed.

Gap, rustproofing, and an extended warranty belong in the price field if they will sit on the note. If you pay them in cash, leave them out. The tool does not amortize a balloon or a lease residual.

How to use it at the dealership

Start with the out-the-door price you were quoted, not the TV payment. Enter the cash you will actually bring and the trade allowance on the buyer’s order. Use the rate on the financing contract, not APR with prepaid fees mixed in. Pick 36, 48, 60, or 72 months with the chips.

Then look at take-home pay for the state you work in. A car payment that is fine on gross income can crowd rent after tax. Sales-tax rate can be copied from the sales tax calculator for your state if you do not have the dealer’s tax line yet.

Worked example

A $35,000 vehicle, $3,000 down, no trade-in, 6.5% tax, 7% for 60 months finances about $34,275 (tax is about $2,275). The payment is about $679. Over five years you repay about $40,700, of which about $6,450 is interest.

The same car at 72 months drops the payment and adds interest. If that extra interest is more than a cheaper car’s price gap, you are financing the wrong vehicle.

What this will not do

It will not price a lease, a balloon, or a 0% manufacturer offer with a hidden price hike. It will not include title, documentation, or dealer fees unless you fold them into price. It is not a credit-union underwriting decision.

For a mortgage, use the mortgage calculator. For a personal or already-funded note, use the loan calculator. Keep the three searches on three URLs so the answer matches the question.

Typical examples

Frequently asked questions

How is a car payment calculated?

Amount financed is price minus down payment minus trade-in, plus sales tax (this page taxes price minus trade-in). The monthly payment is standard amortization: M = P × r(1+r)^n / ((1+r)^n − 1), with r as the monthly rate and n as months.

What is the monthly payment on a $35,000 car?

With $3,000 down, 6.5% tax rolled into the loan, 7% for 60 months, this page shows about $679 a month and about $6,450 of interest. A longer term lowers the payment and raises interest. Always compare the interest line, not only the payment.

Should I use this or the loan calculator?

Use this page when you have a sticker price, down payment, trade-in, and sales tax. Use the loan payment calculator when you already know the amount financed—a personal loan, a note with tax paid in cash, or a refinance of an existing auto balance.

Is sales tax always financed?

Often at a dealership, yes. You can set tax to 0 and raise the down payment if you will pay tax in cash. Some states tax the full price even with a trade-in; others tax the difference. Check your state, or use the sales tax calculator for the rate.

Does a 72-month loan save money?

It saves cash this month and usually costs more interest. If the car’s value falls faster than the balance, you are underwater. Run 48, 60, and 72 on the same price and read total interest before you sign.