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Buying & FinancingTrade-In Equity Calculator — Positive or Negative?
Find out whether your car is worth more than you still owe. Enter your loan payoff amount and the trade-in value you’ve been offered.
Subtract your loan payoff from the trade-in offer. A $16,000 offer on a car with a $13,500 payoff is $2,500 of positive equity toward your next car; a car worth $32,800 with $35,600 still owed has $2,800 of negative equity — debt that follows you unless you pay it off.
How this calculator works
Equity is simply your trade-in value minus what you still owe (the payoff). Positive equity is money toward your next car; negative equity (being “underwater”) is debt that typically gets rolled into the next loan — which is how people end up financing more than their new car is worth.
What changes the number
- Get your exact payoff from the lender, not just the balance — it can include a few days of interest.
- A private-party sale usually beats a dealer trade-in offer, turning more of your car’s value into equity.
- Rolling negative equity into a new loan stacks old debt on a new car — a fast way to stay underwater for years.
Positive or negative equity at a glance
| Trade-in offer | Loan payoff | Equity | What happens to it |
|---|---|---|---|
| $16,000 | $13,500 | +$2,500 | Applied to the next car like cash down |
| $20,000 | $20,000 | $0 | Trade clears the loan; nothing carries over |
| $32,800 | $35,600 | −$2,800 | Paid off, or rolled into the next loan |
What rolling negative equity into a new loan costs (7% APR)
On top of the payment for the new car itself. A longer term shrinks the monthly hit but raises the interest — and keeps you underwater longer.
| Negative equity rolled in | Extra per month (60 mo) | Extra interest (60 mo) | Extra per month (72 mo) | Extra interest (72 mo) |
|---|---|---|---|---|
| $2,000 | $39.60 | $376 | $34.10 | $455 |
| $4,000 | $79.20 | $752 | $68.20 | $910 |
| $6,000 | $118.81 | $1,128 | $102.29 | $1,365 |
| $8,000 | $158.41 | $1,505 | $136.39 | $1,820 |
Frequently asked questions
What is negative equity?
It means you owe more on the car than it’s worth — you’re “underwater.” Selling or trading it doesn’t clear the loan; the shortfall has to be paid or rolled into a new loan.
How do I get my exact payoff?
Ask your lender for a “10-day payoff” figure. It’s the balance plus interest accrued to the payoff date, and it’s the number that matters for a trade.
Should I roll negative equity into a new loan?
Avoid it if you can — it inflates the new loan and keeps you underwater. Better to wait, pay down the gap, or sell privately for more than a trade offer.
How do I calculate negative equity on a car?
Subtract the loan payoff from what the car is worth, or from what a dealer offers for it. If the result is below zero, that’s your negative equity: a car worth $32,800 with $35,600 still owed has $35,600 − $32,800 = $2,800. Use the lender’s payoff figure, not the balance on your statement.
How much does rolling negative equity add to my payment?
About $19.80 a month for every $1,000 rolled into a 60-month loan at 7% APR — so $4,000 of negative equity adds roughly $79 a month and about $750 in interest, on top of the new car’s own payment. The table above shows other amounts and a 72-month term.
How do I get out of negative equity?
Keep the car and pay extra toward principal until the balance drops below its value; refinancing to a shorter term helps if you can get a better rate. If you have to sell, a private sale usually brings more than a trade-in offer, and paying the gap in cash avoids financing it. Gap insurance covers the shortfall only if the car is totaled or stolen — it does nothing at trade-in.
Does positive equity count as a down payment?
Yes. The dealer applies positive trade-in equity to the new deal just like cash down, lowering the amount you finance. In most states the trade-in also reduces your sales tax, because tax is charged on the price minus the trade-in value.