Auto Loan Calculator

The loan is not the sticker price. It is the price minus what you put down — cash plus any trade-in equity — and that difference is the only figure interest is charged on. One detail catches people out at the dealership. Sales tax, title, registration and dealer fees are frequently rolled into the loan rather than paid up front, which quietly raises the amount financed above the negotiated price of the car. If you are comparing this calculator's output to a dealer's quote and the numbers differ, that is usually the reason. A trade-in cuts both ways too. If you still owe more on the old car than it is worth, that negative equity does not vanish: it is typically added to the new loan, so you begin the new contract already borrowing against a car you no longer own.

Once the amount financed is fixed, the payment comes from the standard amortization formula: payment = L × i ÷ (1 − (1 + i)^-n), where L is the amount financed, i is the monthly rate (the APR divided by 12) and n is the number of months. With the calculator's defaults — a $30,000 car, $3,000 down, 7% APR over 60 months — the $27,000 financed produces a payment of roughly $535 a month. Each payment splits into interest on the outstanding balance and principal that reduces it. Early payments are interest-heavy for the same reason they are on a mortgage: the balance is at its maximum on day one. The total-of-payments figure is what the car actually costs you in cash, and the gap between it and the price is the cost of borrowing.

Stretching a car loan from 60 months to 72 or 84 lowers the monthly payment, and that is exactly why it is offered. It also does two things that are less visible. It raises total interest, because the balance stays high for longer and interest is charged on the balance. Compare the total-of-payments row across terms rather than the monthly figure alone; the spread is often large enough to change what car you would choose. It also lengthens the period of negative equity. Vehicles lose value fastest in their early years, while a long loan pays principal down slowly at the start. The two curves cross late, so for much of a long contract you owe more than the car would sell for. That is not a problem until you need to sell, trade, or the car is totaled — and then it is, because insurance generally pays what the vehicle was worth, not what you owe.

The rate is not a property of the car. It is priced off your credit profile, the loan term, the age of the vehicle and who is doing the lending, so two buyers signing for the same model on the same day can get materially different APRs. Dealer-arranged financing is worth understanding as a structure. The dealer typically submits your application to lenders and presents you with an offer, and in many arrangements the rate you are shown may include a markup above what the lender approved. That is legal and disclosed, but it is negotiable, and the way to find out is to arrive with a preapproval from a bank or credit union in hand and treat it as the number to beat. One more caution on promotions: a very low advertised APR is often tied to a specific credit tier, a shorter term, or is offered instead of a cash rebate. Run both scenarios through the calculator before assuming the low rate is the cheaper path. Rates, fees and eligibility vary by lender — the binding terms are the ones on the contract you sign.

This calculator returns principal and interest. That is one line in the real cost of owning a car. Insurance is the big one, and it is not uniform: premiums vary by vehicle, driver, location and coverage, and a lender will require comprehensive and collision coverage for as long as it holds the title. Then registration and renewals, fuel or charging, tires, scheduled maintenance, and repairs once any warranty lapses. Separately, dealers commonly offer add-ons at signing — extended warranties, gap coverage, protection packages. These have real uses, but they are usually financed alongside the car, which means you pay interest on them for the whole term. Ask for the price of each one separately rather than as a change to the monthly payment, since a small monthly difference across many months is a large number. Before committing, it is worth checking the payment against your whole budget rather than against what a lender is willing to approve. Those are different questions.