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A car payment depends on four things: what you pay for the car, how much you put down, the interest rate and how long you stretch the loan. Of those, the term is where most buyers get into trouble, because a longer loan is the easiest way to make an unaffordable car look affordable.

Stretching from sixty to eighty-four months lowers the monthly figure noticeably, but you pay interest for two more years and you spend much longer owing more than the car is worth. A new car typically loses a large slice of its value in the first year, so a long loan commonly leaves buyers in a position where the settlement figure exceeds the resale value — sometimes called being underwater or upside down. If you need to sell or the car is written off, that gap comes out of your pocket.

Sales tax is easy to overlook because it is usually rolled into the financed amount rather than paid upfront. In most places it is charged on the price minus any trade-in, which is one genuine advantage of trading a car in rather than selling it privately. Fees for title, registration and documentation get added in the same way, and they quietly increase both the balance and the interest charged on it.

Two habits pay off. First, get pre-approved by a bank or credit union before you go to the dealer; having a rate in hand turns dealer financing into a comparable offer rather than the only option. Second, keep the term as short as the monthly budget genuinely allows — thirty-six to sixty months is a sensible range for most buyers — and put down enough that you are never owing more than the car is worth.

Short term, used cars often make more financial sense than new ones, because someone else has already absorbed the steepest depreciation. Whichever you choose, budget for insurance, fuel, maintenance and tyres on top of the payment. This calculator gives an estimate; your lender's truth-in-lending disclosure is the binding figure.

This calculator returns estimates for general information only. It is not financial, investment, tax or legal advice, and it cannot replace guidance from a qualified professional who knows your circumstances. Figures such as loan payments, investment growth and retirement projections are simplified models based on the inputs and assumptions you provide, not guarantees of future results.