Nearly 3 in 10 car trade-ins are underwater. Don't roll it forward.

You owe $22,000 on the car. The dealer values it at $16,000. You are $6,000 underwater, also called negative equity. Sell it today, hand over the keys, and you still owe six grand on a car sitting in somebody else's driveway.

It happens the same way every time: small down payment, long loan term, and a car that loses value faster than you pay down principal. Edmunds found the average underwater trade-in was four years old. Jessica Caldwell, their head of insights, put the cause plainly: buyers who financed at 2022's peak prices are coming back to trade in, and they're bringing thousands of dollars of old debt with them.

Edmunds tracked what happens to people who do it anyway. The average monthly payment on a new-car loan with negative equity rolled in hit $944 in Q2, a record, versus $777 for the average new-car loan. That's $167 a month extra, forever, for a car you already gave back.

The interest is the uglier half. Those loans are projected to cost $16,270 in total interest over their life, against $9,811 for the typical new-vehicle loan. Call it $6,459 in pure extra cost. With Bankrate putting the 60-month new-car rate near 6.97% as of July 31, 2026, that old $6,884 isn't just tagging along. It's earning the lender money the entire time.

Edmunds' Q1 2026 data found 43% of loans carrying negative equity were written at 84 months. Seven years. A car loses value fastest in its first two or three years, and a seven-year term pays down principal so slowly that depreciation wins for most of the loan. You're underwater by design, not by accident.

Look at which vehicles top the list and it's the safe, popular stuff: Toyota Tundra owners averaged $8,929 in negative equity, GMC Sierra $8,568, Chevy Silverado $8,516, Ford F-150 $8,417, Ram 1500 $8,347. Ivan Drury at Edmunds made the point that when historically strong resale bets show up underwater, it's a financing problem, not a bad-car problem. The term did that, not the truck.

One rule handles most of it: cap the loan at 60 months and put real money down. If the payment only works at 72 or 84 months, that's not a financing puzzle, that's the car telling you it costs more than you can afford. The rule matters even more used, where Experian pegged the average rate at 11.43% in Q1 2026 against 6.39% for new.

If you're already upside down, the cheapest move is deeply boring: keep the car and keep paying. Every extra dollar you throw at principal pulls you back toward even faster. Wait until the loan is dead, or at least until the car is worth more than you owe, and then go shopping. A dealer will happily solve your negative equity today by selling you more of it.