Monthly car payment with trade-in, sales tax, fees and APR, plus the full payoff schedule
Estimates only, not financial advice. What you type stays on your device. Updated on 24 Oct 2026.Enter the price, down payment, trade-in, sales tax rate, fees, APR and term. A $35,000 car with 7% tax, $800 of fees and $5,000 down finances $33,250; at 6.9% APR for 60 months the payment is $656.82 and the interest about $6,159, with the full schedule below.
Enter the Vehicle price, Cash down payment and APR from the lender's offer.
Set the Term in months, or pick one of the Common terms: 36, 48, 60 or 72 mo.
Add any Trade-in value, what is Still owed on the trade-in, the Sales tax rate and the Title, registration and dealer fees.
Turn on Pay tax and fees at signing if you will not finance them.
Read the Monthly payment, Amount financed and Total interest, and open Amortization schedule; Share result copies a link.
The monthly payment on a car loan depends only on the amount financed, the APR and the term. Working out the amount financed is where most of the confusion lives, so this calculator builds it step by step from the figures on a dealer's buyer's order.
Amount financed. Start from the agreed price. Take off the cash down payment and the trade-in equity, which is the trade-in value less any loan still owed on it. When more is owed than the car is worth, that negative equity is added to the new loan, and the page shows it. Sales tax and fees (title, registration, documentation) are added too, unless you switch on paying them at signing.
Sales tax and the trade-in. In many states sales tax is charged on the price minus the trade-in value, which makes a trade-in worth more than its sticker figure. Some states tax the full price instead. Rules differ and change, so this is a switch: check your state's department of revenue or motor vehicle agency, and enter the combined state and local rate yourself.
The payment. The monthly payment uses the standard amortization formula, P × r × (1 + r)^n ÷ ((1 + r)^n − 1), with r the APR divided by 12; it is the same formula as this site's EMI Calculator. Early payments are mostly interest: on $33,250 at 6.9% for 60 months, the first $656.82 payment carries $191.19 of interest. Stretching the same loan to 72 months lowers the payment to about $565 but lifts the total interest from about $6,159 to over $7,400. The schedule rounds each month's interest to the cent and lets the last payment absorb the difference, so the balance ends at exactly zero. A lender's contract can differ by a few cents, and loans that charge interest daily differ a little more.
What it does not do. It does not know your credit score, a dealer's rate markup, rebates, add-ons such as gap insurance or extended warranties, or how your state taxes fees and rebates; add those to the price or fees if they apply. The currency choice changes only the symbol, so it also works for a loan in rupees, but India's car loans are usually quoted as an EMI on the EMI Calculator. For leasing instead of buying, use the Auto Lease Calculator.
Lenders use the amortization formula: payment = P × r × (1 + r)^n ÷ ((1 + r)^n − 1), where P is the amount financed, r the APR divided by 12 and n the number of months. Financing $33,250 at 6.9% for 60 months gives $656.82 a month. At 0% APR the payment is simply the amount divided by the months.
In many US states, yes: sales tax is charged on the price minus the trade-in value, so an $8,000 trade-in at a 6% rate saves $480 of tax. Some states tax the full price whatever you trade in. Rules differ, so the calculator has a switch for it; check your state's revenue department for the current rule.
The difference, called negative equity, is added to the new loan. Trading in a car worth $6,000 with $9,000 still owed adds $3,000 to what you borrow, so you pay interest on a car you no longer own. The calculator shows the trade-in equity as a negative figure and includes it in the amount financed.
A longer loan lowers the payment but raises the total interest. On $33,250 at 6.9%, 60 months costs $656.82 a month and about $6,159 of interest; 72 months costs about $565 a month and about $7,450 of interest. Longer loans also leave you owing more than the car is worth for longer.
Paying tax and fees at signing means borrowing less, so the payment and the interest both fall. Rolling them into the loan keeps more cash in hand but charges interest on them for the whole term. Switch between the two in the calculator to see the difference for your figures before you sign.
Lenders round differently, and some charge interest daily on the actual days between payments instead of one-twelfth of the APR each month. A first payment due more than a month after signing also adds interest. This calculator rounds each month's interest to the cent and lets the last payment absorb the difference, so small gaps are normal.
Formula only: no rates or limits are read from an official source.
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Also works as: Car Loan Calculator · Car Payment Calculator · Auto Payment Calculator · Car Down Payment Calculator.
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