How to Use This Calculator
Enter your current vehicle's outstanding loan balance and its trade-in or market value. The calculator immediately shows whether you have positive or negative equity. Then enter the new vehicle price, your down payment, the APR, and your desired loan term. You'll see exactly how much negative equity gets rolled into the new loan and how it affects your monthly payment and total interest.
What Is Negative Equity?
Negative equity — also called being "upside-down" or "underwater" — means you owe more on your auto loan than your vehicle is currently worth. For example, if your payoff balance is $18,000 but the car is only worth $14,000 at trade-in, you have $4,000 in negative equity. That $4,000 doesn't disappear; dealers typically roll it into the financing on your next vehicle, increasing your new loan balance and your total interest costs.
Common Causes of Negative Equity
Little or No Down Payment
A new vehicle can lose 10–20% of its value the moment it leaves the lot. If you financed 100% of the purchase price, you start underwater immediately. A down payment of 15–20% provides a cushion that keeps you ahead of early depreciation.
Long Loan Terms
72- and 84-month loans keep monthly payments low, but the loan balance falls slowly while the vehicle depreciates quickly. For most of the first three years you owe more than the car is worth. Shorter terms — 48 to 60 months — track depreciation more closely and reduce the negative-equity window.
Trading In Too Early
Trading in a vehicle before the loan is paid off — especially in the first one to two years — almost guarantees negative equity on a typical new car. The depreciation curve is steepest early in ownership, so the gap between what you owe and what the car is worth is widest then.
High Interest Rates
A high APR means more of each early payment goes to interest rather than reducing the principal. This slows how quickly your balance falls, extending the period during which you're upside-down. Refinancing to a lower rate can help close the gap faster — use our Auto Refinance Calculator to see the impact.
Options When You Have Negative Equity
Keep the Car and Pay It Down
The simplest path: stay with your current vehicle and make extra principal payments to close the equity gap. Even small additional monthly payments dramatically accelerate how quickly you get right-side-up. Use the amortization schedule below to see how extra payments would affect the payoff timeline.
Roll the Negative Equity Into a New Loan
Rolling over negative equity is convenient but costly. Your new loan principal is larger than the car's actual price, which means you pay interest on both the new vehicle and your old debt. This calculator shows you that total cost so you can decide whether the trade is worth it.
Pay the Difference in Cash
If you have savings, paying the negative equity balance out of pocket instead of rolling it in is almost always cheaper. You avoid paying interest on that amount for the entire new loan term. On $4,000 rolled into a 60-month loan at 7.5%, you'd pay roughly $850 in extra interest — money you'd keep if you paid cash.
Refinance Your Current Loan
If your credit has improved since the original loan, refinancing at a lower rate reduces monthly payments and lets you direct more money to principal. This is often the best first step before trading in — close the gap first, then trade.
Frequently Asked Questions
What does "upside down" on a car loan mean?
Being upside down (or underwater) on a car loan means your outstanding loan balance is higher than the vehicle's current market value. For example, if you owe $22,000 on a car worth $18,000, you have $4,000 in negative equity. You're "upside down" because selling or trading in the car wouldn't generate enough money to pay off the loan.
How do I get out of negative equity on my car?
The three main strategies are: (1) Keep the vehicle and make extra principal payments until the loan balance drops below the car's value — usually 12–24 months of patience. (2) Pay the negative equity balance in cash when trading in, rather than rolling it into a new loan. (3) Refinance to a lower rate so more of each payment goes to principal, closing the gap faster. Avoid rolling negative equity into a new loan unless you have no other option.
Can I trade in a car with negative equity?
Yes — dealers will accept a trade-in with negative equity, but they roll the difference into your new loan. This increases your new loan balance beyond the vehicle's actual price. On a $30,000 car with $5,000 in rolled-over negative equity, you'd start with a $35,000 loan — meaning you're immediately underwater on the new vehicle too. Use this calculator to see exactly what that costs you before agreeing to a rollover.
How long does it take to get out of negative equity?
On a typical 60-month loan with a 10% down payment, most borrowers reach positive equity somewhere between months 18 and 30, depending on the vehicle's depreciation rate and their APR. Vehicles with stronger resale values (trucks, popular SUVs) reach positive equity faster. Making one extra principal payment per year can cut the timeline by 3–6 months.
Related Calculators
- Auto Loan Calculator — Calculate monthly payments and total interest for your new vehicle loan.
- Auto Refinance Calculator — See if refinancing your current loan at a lower rate can close the equity gap faster.
- Lease vs. Buy Calculator — Considering your next vehicle? Compare the true cost of leasing vs. buying.
- Auto Lease Calculator — Estimate monthly lease payments if you decide to lease your next vehicle.