Negative equity: upside-down on a car loan

Negative equity — being "upside-down" or "underwater" — means you owe more on your car loan than the car is worth. Owe $22,000 on a car worth $17,000, and you have $5,000 of negative equity. It's one of the most common and least understood traps in car buying.

How people get here

• Long loan terms — 72–84 month loans pay principal slower than cars depreciate (the 72 vs 84 math)
• Little or no down payment — you start underwater the moment you drive off
• Rolling over previous negative equity — the compounding version of the problem
• Fast-depreciating models — some cars lose 50%+ of value in three years

What rolling it over really costs

Trade in that $17,000 car owing $22,000, and the $5,000 gap gets added to the new loan. Now you're financing a $30,000 car for $35,000 — underwater on day one, paying interest on $5,000 of car you no longer own. Do it twice and the hole compounds. Dealers make this feel painless ("we'll pay off your trade no matter what you owe!"); the payoff isn't forgiveness, it's a transfer — onto your new loan, with interest.

Ways out

• Keep the car and keep paying — equity returns as the loan amortizes; extra principal payments accelerate it dramatically
• Pay the gap in cash at trade-in time rather than financing it
• Gap insurance — doesn't fix negative equity, but protects you if the car is totaled while underwater

The calculator handles this directly: enter your trade-in value and the amount you still owe, and it adds the shortfall to the new amount financed — so you see the true cost before the finance office shows you the "easy" version.

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