Negative Equity Car Loan Calculator

When the payoff on your current car is more than the trade-in allowance, the difference is usually rolled into the new loan. Enter the payoff, the allowance, the new price, the rate, the term and an annual depreciation rate, and this returns the payment with and without the rollover, the extra interest it costs, and the month the balance finally falls below the value of the car. A second tab does the same for a loan you already have, including what an extra payment each month would take off. Depreciation is a single rate you supply, so the crossover month is only as good as that figure.

Calculator Type

What the old balance costs when it goes into the new loan, and which month the new loan finally drops below the value of the new car.

The payoff quote from the lender, which includes interest to the settlement date and is usually a little more than the balance on the last statement.
What the dealer is giving you, or what a private sale would fetch. The difference between this and the payoff is the negative equity.
Book value rather than sticker. A new car is usually worth less than the price the moment it is driven away, and entering that difference is what makes the first months honest.
Charged here on the price less the trade-in allowance, which is how most states with a sales tax treat a trade.
A single annual rate applied smoothly. Real depreciation is steepest in the first year and flattens after, and it turns on the model and the mileage, so use a figure you have a reason to trust rather than the default.
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For the loan you already have, with no new purchase. Enter the balance, what the car is worth and the terms, and this finds the month the balance drops below the value.

A book value, a trade-in quote or a realistic private sale price. Not the price you paid.
Anything above the scheduled payment, applied to principal. This is the one lever that works on a loan already running.
A single annual rate applied smoothly. Real depreciation is steepest in the first year and flattens after, and it turns on the model and the mileage, so use a figure you have a reason to trust rather than the default.
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