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Four numbers set the payment: the amount financed, the interest rate, the term, and anything rolled in from a trade-in. The amount financed is not the sticker price — it is the negotiated price plus tax, title, registration and dealer fees, minus your down payment and trade-in equity.

That is why a payment quote can move by $60 a month between two dealers advertising the same car at the same price. Negotiate the out-the-door price, not the monthly payment: a dealer asked for a specific monthly figure will simply lengthen the term until they hit it.

Seventy-two and eighty-four month car loans exist because they make expensive cars look affordable. They do so by extending the period during which you owe more than the car is worth. A new car typically loses 20% of its value in the first year and around 50% in five, while a long loan repays principal slowly.

The practical consequence is negative equity. If the car is written off or you need to sell in year three, the insurance payout or sale price may not clear the loan — and the shortfall gets rolled into your next car loan, where the cycle repeats. A useful rule: if you cannot afford the car on a 60-month term, you cannot afford the car.

Used-car loans almost always carry a higher rate than new-car loans, because the collateral is older and depreciation is harder to predict. Manufacturer-subsidised finance can undercut the market substantially on new cars — sometimes at 0% — but it is usually offered as an alternative to a cash rebate, not alongside it.

When a dealer offers 0% or a $2,500 rebate, calculate both: take the rebate, finance the smaller amount through a credit union at the market rate, and compare the total paid against the 0% deal on the full price. On cheaper cars and shorter terms the rebate often wins.

Walk into the dealership with a pre-approval from a bank or credit union and two things change. You know your real rate, so you can tell instantly whether the finance office is marking it up — dealer reserve of one to two percentage points is standard practice. And you can negotiate as a cash buyer, which removes the monthly-payment conversation entirely.

Rate shopping does not wreck your credit. Multiple auto-loan enquiries inside a short window are treated as a single enquiry by the major scoring models precisely so that borrowers can compare.

Insurance, fuel, tyres, servicing, registration renewal and depreciation are all real costs of owning the car, and none of them appear in the loan payment. Full-coverage insurance is mandatory while there is a lien on the vehicle, and on a new car it can add $150 or more a month for a young driver.

Budget the total cost of ownership before signing. A cheaper car with a larger insurance premium can cost more per month than a more expensive one, and a car you can only afford with zero maintenance budget will eventually force the repair onto a credit card.