Negative Equity Car Trade Calculator
Compare your lender payoff with the trade value, then see what happens if the shortfall is added to the next loan instead of paid separately.
Separate the old loan from the new car.
Negative equity = current loan payoff − actual trade value, when payoff is higher. If payoff is $22,000 and the dealer offers $17,000, the vehicle is $5,000 underwater.
What happens when negative equity is rolled into a new loan
If you do not pay the $5,000 shortfall in cash, the dealer/lender may add it to the amount financed on the replacement vehicle, subject to lender approval. The Consumer Financial Protection Bureau warns that rolling negative equity into a new auto loan makes the new loan more expensive.
CFPB guidance on trading a car that is not paid off
Why the monthly payment can hide the problem
A salesperson can stretch the term to keep the monthly payment close to your target even though the new amount financed is much higher. Compare principal financed, APR, term and total interest—not only the payment.
Example: $5,000 rollover
If the replacement deal would otherwise require $32,000 of financing, rolling $5,000 of old debt creates roughly $37,000 of principal before any other financing adjustments. At the same APR and term, both the payment and total interest rise because you are financing debt from two vehicles inside one loan.
Tax treatment and equity are separate
A state may use the gross qualifying trade allowance for tax even when the vehicle has negative equity. Do not subtract payoff from the trade allowance unless the state tax rule actually says to do so. Tax base and amount financed answer different questions.
Alternatives to compare before rolling debt
- Keep the current vehicle longer and pay down principal
- Bring cash to cover part or all of the shortfall
- Seek a stronger trade offer
- Sell privately if the lien can be safely satisfied
- Choose a less expensive replacement vehicle
- Compare outside lender/preapproval terms
Check the final paperwork
Confirm the old loan payoff, trade allowance, negative-equity amount, new OTD price and amount financed all reconcile. “We will pay off your trade” does not mean the old debt is forgiven; the FTC also cautions buyers to understand how negative equity is handled.