Auto Loan Calculator

This auto loan calculator gives you the monthly payment on a car, plus the sales tax, the cash due at signing, the total interest, and a month-by-month amortization schedule. The Total Price tab starts from a vehicle price. The Monthly Payment tab runs it in reverse: give it the payment you can afford and it returns the price that fits. Down payment takes either a percentage or a dollar amount, and the state selector fills in an average sales tax rate for you. The figures are built around U.S. car buying, so buyers elsewhere should adjust the tax and fee inputs.

How auto loans work

An auto loan is a secured loan: the car itself is the collateral. Terms in the U.S. cluster at 36, 60, 72, and 84 months, and each monthly payment covers interest first and principal second. Because the loan is secured, missing payments has a specific consequence that an unsecured loan does not carry. The lender can repossess the vehicle, and you can still owe the difference if it sells for less than the balance.

The term you pick changes the payment far more than it changes the cost. On a $32,000 loan at 6%, 36 months costs $973 a month and $3,048 in interest; 72 months drops the payment to $530 but pushes interest to $6,178. The longer term buys breathing room in the monthly budget and charges you about $3,100 for it.

Dealer financing against direct lending

Two routes lead to the same car. Direct lending means you arrange the loan yourself with a bank, credit union, or online lender, get approved before you shop, and hand the dealer a financing commitment. Dealer financing means the dealership originates the paperwork, usually through a captive lender tied to the manufacturer, then often sells the contract on to a bank that services it.

Direct lending gives you the stronger position. A pre-approval sets a rate the dealer has to beat, it does not tie you to one showroom, and walking out costs you nothing. Dealer financing wins on convenience, and it is the practical option for buyers who cannot get approved directly or do not want to spend a weekend rate shopping.

One caveat cuts the other way: manufacturers subsidise financing to move cars, and those promotional rates run through dealers. Offers of 0%, 0.9%, 1.9%, or 2.9% appear regularly on specific models, and no bank will match a subsidised rate. Check what the manufacturer is offering before you assume your credit union has the best number, and compare using the APR Calculator so fees are counted on both sides.

Rebates and how they are taxed

A cash rebate cuts what you pay for the car, but in most states it does not cut what you pay in sales tax. Buy a $50,000 vehicle with a $2,000 rebate and the tax is usually assessed on the full $50,000, not the $48,000 you actually hand over. At an 8% rate that costs you $160 more than you might expect.

Twenty-one states leave rebates out of the taxable amount: Alaska, Arizona, Delaware, Iowa, Kansas, Kentucky, Louisiana, Massachusetts, Minnesota, Missouri, Montana, Nebraska, New Hampshire, Oklahoma, Oregon, Pennsylvania, Rhode Island, Texas, Utah, Vermont, and Wyoming. Rebates are also largely a new-car tool. Used-car dealers rarely offer them, since pricing a used vehicle is already a negotiation rather than a sticker.

The fees on top of the sticker price

The advertised price is not the amount financed. These charges are added at the desk, and most can be rolled into the loan or paid upfront; buyers with weak credit are sometimes required to pay them upfront.

• Sales tax. Most states charge it on vehicle purchases and most let you finance it. Alaska, Delaware, Montana, New Hampshire, and Oregon charge none.
• Documentation fee. The dealer's charge for processing title and registration paperwork. Some states cap it; others do not.
• Title and registration. Paid to the state to put the car in your name and on the road.
• Advertising fee. The regional dealer group's marketing cost, passed along at a few hundred dollars. If it is not itemised, it is already inside the price.
• Destination charge. Shipping from the factory to the lot, typically $900 to $1,500. It is set by the manufacturer and is not negotiable.
• Insurance. Coverage is required to drive legally and is usually needed before the dealer will release the car. Financed vehicles almost always require full coverage, which can run well over $1,000 a year.

If you plan to finance the taxes and fees, tick "Include taxes and fees in loan" above; leave it clear if you are paying them at signing, and the calculator moves them into the upfront figure instead. If a line item appears that nobody can explain, ask what it buys before you sign.

Trade-ins and the tax break they carry

Trading in is selling your current car to the dealer for credit against the new one. Expect less than a private sale would bring, since the dealer has to recondition and resell it. Selling privately usually nets more money, and the gap is often several thousand dollars.

The trade-in has a second effect that partly offsets that gap. In most states that tax car purchases, sales tax applies to the price after the trade-in is deducted. On a $50,000 car with a $10,000 trade-in at 8%, the tax is ($50,000 − $10,000) × 8% = $3,200 rather than $4,000, so the trade-in is worth an extra $800 in tax alone.

Eight jurisdictions give no such credit and tax the full price: California, the District of Columbia, Hawaii, Kentucky, Maryland, Michigan, Montana, and Virginia. In those places the arithmetic favours a private sale even more, since trading in buys you nothing on tax. The calculator applies the right method automatically once you pick your state.

Getting a better deal

Prepare before you walk in. Decide what you can afford, then which car, then what that car actually sells for in your area. Buyers who arrive with a pre-approval and a target price negotiate from a different position than buyers who arrive with a monthly budget. Quotes from two or three lenders take an afternoon and routinely save more than a day of haggling.

Fix your credit first if you can. Credit score drives approval and pricing more than anything else on the application. The spread between excellent and subprime credit on a 60-month loan is commonly 8 to 12 percentage points, which on $32,000 is thousands of dollars. If you are a few months from a better score, waiting can be worth more than any discount you negotiate.

Weigh cash back against a low rate. Manufacturers often make you choose: take the rebate or take the subsidised financing, not both. A rebate cuts the price now; a 1.9% rate cuts interest over years. Which wins depends on the loan size and how long you finance, so run both through the calculator and compare total cost rather than monthly payment.

Pay it off early where the contract allows. Extra principal shortens the loan and removes the interest that balance would have earned. Check the contract first, since some lenders charge a prepayment penalty or apply extra payments to the next installment instead of the principal. Our Loan Calculator shows what a given extra payment saves.

Consider not buying new. A new car loses value the moment it leaves the lot, sometimes more than 10% immediately and roughly 20% in the first year. A two- or three-year-old version of the same model has already taken that hit for you. If you want a new car mainly for the experience of driving one, a lease costs less upfront, and the Auto Lease Calculator prices it. And in some situations the honest answer is no car at all, if transit, cycling, or a carpool covers the trips you actually make.

What interest rate to expect

Auto loan rates are priced off your credit score first and the car's age second. Borrowers in the top tier, roughly 780 and above, typically see rates in the mid single digits on a new car, while scores under 600 are often quoted in the high teens or worse. Used-car loans usually run 1 to 3 percentage points above new-car loans on the same credit profile, because a used vehicle is harder collateral to value and to resell.

The gap is worth real money. On $32,000 over 60 months, 6% costs $5,119 in interest and 14% costs $12,653, a difference of $7,534 for the same car. That is why a delay of a few months to clear a collection or pay down card balances often beats anything you can negotiate on price. If you take a high rate now because you need the car, you are not stuck with it: once your score recovers, refinancing into a lower rate is straightforward on a car loan, and the Refinance Calculator shows what the switch would save.

Negative equity and how to avoid it

A car loan goes underwater when the balance exceeds what the vehicle is worth. It happens because depreciation is front-loaded and amortization is not: the car can lose 20% in year one while the loan has repaid only a fraction of the principal. Long terms make it worse, which is why an 84-month loan on a small down payment can leave a buyer underwater for three or four years.

Being underwater only matters when you have to act. Sell or trade early and you must cover the shortfall in cash. Total the car and the insurer pays what it was worth, not what you owe, leaving you paying for a vehicle you no longer have. Gap insurance covers exactly that difference and is worth pricing on any loan with a small down payment or a term past 60 months. The reliable prevention is simpler: put more down, keep the term shorter, and avoid rolling the balance of an old loan into a new one, which starts the next car underwater on day one.

Paying cash instead of financing

Most U.S. cars are bought with a loan, but paying outright has real advantages:

• No payment and no interest. Borrowing $32,000 for five years at 6% costs $618.65 a month and $5,118.98 in interest. Paying cash keeps that $5,118.98.
• Full ownership from day one. No lienholder means you can sell whenever you like, drop to liability-only coverage if the car's value justifies it, and modify it freely.
• A natural spending limit. Cash caps you at what you actually have. Financing invites the opposite: another $40 a month sounds harmless, and it quietly moves you up a trim level or two.
• Some rebates are cash-only. Where a manufacturer makes you pick between a rebate and cheap financing, paying cash takes the rebate off the table.
• No chance of going underwater. A financed car can be worth less than the balance owed, which becomes a problem the moment you want to sell or the car is totalled. Paying in full removes that risk entirely.

Cash is not automatically right. If a manufacturer offers 0.9% and your savings earn more than that, financing and keeping the money invested comes out ahead. A borrower building credit may also want the loan on their file, since a car loan paid on time for years does useful work on a thin credit report. To see how a new payment fits the rest of your obligations, check the Debt-to-Income Ratio Calculator.

How this calculator works

In Total Price mode it starts from the vehicle price, subtracts your down payment, trade-in value, and any cash incentive, adds back what you still owe on the trade-in, and applies your state's sales tax to the price less the trade-in. Depending on the checkbox, taxes and fees either join the amount financed or land in the upfront figure. The payment comes from the standard amortization formula on that balance, and the schedule below the chart splits every month into interest and principal.

Monthly Payment mode reverses it. From your budget, rate, and term it solves for the largest loan those payments support, then adds back your down payment, trade-in, and incentives to arrive at a target price. When the down payment is entered as a percentage, it scales with the price being solved for, so the calculator accounts for that rather than treating it as a fixed amount. Use the result as a shopping ceiling, then switch to Total Price mode with a real quote to price the deal exactly. For a general loan of any type, the Payment Calculator covers the same math without the vehicle-specific taxes and fees.