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Buying a Car: What to Actually Think About

The math and traps that matter more than the sticker price.

New vs. used

A new car typically loses around 20% of its value in the first year alone. A 2–3 year old used car often gets you roughly 80% of the car for 60% of the price — letting someone else eat the steepest part of the depreciation curve.

How much car you can actually afford

A common guideline: keep total cost of ownership — payment, insurance, gas, and maintenance combined — under about 10–15% of your take-home pay. Keep the loan term itself short (36–60 months); a longer term lowers the payment but increases total interest and the risk of owing more than the car is worth.

Financing traps

Dealer financing can be worse than a pre-approval from your own bank or credit union — get pre-approved before you're in the finance office so you have a real number to compare against. A longer loan term trades a lower monthly payment for more total interest and a longer stretch of being 'upside down' on the loan.

'0% financing' offers are sometimes genuinely free money, and sometimes a trade-off against a cash rebate you'd get by paying differently — run the math both ways before assuming the 0% option is actually cheaper.

Buy vs. lease

Leasing means a lower monthly payment and always driving something newer, but you own nothing at the end, and going over the mileage limit gets expensive fast. Buying — especially a car you keep well past the loan being paid off — is usually the cheaper choice over the long run for most people.