Trading vehicles is supposed to mean moving into something newer, nicer or better suited to your needs. For some buyers, however, it also means bringing debt from the old vehicle along for the ride. Unfortunately, that passenger doesn’t chip in for gas.
According to Edmunds, 29.1% of trade-ins with outstanding loans toward new-vehicle purchases carried negative equity in the third quarter of 2026. That was up from 28.1% a year earlier, although below the 30.9% recorded at the beginning of this year. Owners of those underwater vehicles owed an average of $7,107 more than their vehicles were worth.
That distinction matters: These figures describe financed trade-ins involved in new-vehicle purchases, not all vehicles on the road. Negative equity simply means the loan payoff exceeds the vehicle’s value. It becomes a particularly important number when you want or need to replace that vehicle, because the difference must be accounted for in the transaction.
Edmunds found that buyers rolling negative equity into another loan financed an average of $57,235, compared with $39,732 in the third quarter of 2019, a 44.1% increase. Their average monthly payment climbed from $646 to $952, up 47.4%. At an average annual percentage rate of 8.1%, those borrowers faced an estimated $16,610 in lifetime interest, nearly 83% more than in 2019. And 91.2% financed for 72 months or longer.
Think about what that means for a household budget. The payment is one obligation, but the length of that obligation deserves equal attention. Before signing, ask yourself whether you expect to keep the vehicle through the entire repayment period. If you already anticipate wanting something different well before the last payment, that should be part of the buying decision today.
Compared with the average new-vehicle buyer, Edmunds said borrowers carrying over negative equity financed roughly $12,600 more, paid an additional $165 monthly and faced nearly $6,700 more in total interest. Edmunds attributes today’s problem partly to buyers purchasing at pandemic-era peak prices, followed by declining used-vehicle values.
Here is a simple illustration. Suppose your vehicle is worth $20,000, but your payoff is $27,000. That leaves a $7,000 shortfall. If you finance that entire difference along with a $35,000 replacement vehicle, you are starting at $42,000 before taxes, fees or other purchases, assuming no down payment. The replacement costs $35,000, but the financing includes debt from two vehicles.
This is why I encourage buyers to understand their trade situation before shopping. Get the payoff from your lender, obtain realistic appraisals and compare the numbers. Finding out you are underwater after you have picked a vehicle and mentally parked it in your driveway makes an already difficult decision more emotional.
Also, ask for the purchase price, trade allowance, payoff, amount financed, interest rate and term to be explained clearly. Give the total obligation as much attention as the monthly payment. A dealership can walk you through the transaction, but you need to understand exactly how much existing debt you are carrying forward.
My advice is to pause long enough to distinguish a transportation need from the desire for something different. If replacement is necessary, work from a realistic budget that includes the old balance. If it is optional, consider whether the next vehicle is worth taking that debt with you. The excitement of trading should survive a careful look at the numbers.