Negative Equity Roll-Over Calculator
See the real cost of rolling negative equity (the amount you owe above your car’s value) into a new auto loan. This common dealer trick traps buyers in a multi-year cycle of always being upside-down.
Negative Equity Calculator
See how upside-down your loan is and how fast extra payments dig you out.
How It Works
When you trade in a car with $5 000 of negative equity, the dealer adds it to your new car loan. You now finance the new car PLUS the leftover debt PLUS interest on both. Three years later you're upside-down again, and the cycle repeats.
How to Use This Calculator
- Enter your current loan balance and current car value to find negative equity.
- Enter the new car price, sales tax, and fees.
- Pick a loan term and APR.
- The calculator shows how much extra interest you pay on the negative equity alone.
Worked Example
Reference Table
Total cost of rolled negative equity by loan term and APR. The extra interest can double the original underwater amount on long-term, high-APR loans.
| Negative equity | 72-mo cost @ 7% APR | 84-mo cost @ 8% APR |
|---|---|---|
| $2 000 | $2 449 | $2 658 |
| $5 000 | $6 121 | $6 645 |
| $8 000 | $9 794 | $10 631 |
| $10 000 | $12 242 | $13 289 |
| $15 000 | $18 363 | $19 933 |
Frequently Asked Questions
What should I do instead of rolling negative equity?
Three better options: (1) Pay extra principal until you're even, then trade. (2) Keep driving the current car — depreciation slows after year 3. (3) Pay the negative equity out of pocket at trade-in time (writing a check for $3 000 hurts less than financing it for 72 months).
Will any dealer roll any amount of negative equity?
No. Most lenders cap total LTV at 130–135%. If your negative equity plus the new car price exceeds that ratio, the loan won't fund. The deeper underwater you are, the harder this gets.
Does my credit score drop when I have negative equity?
The negative equity itself doesn't show on your credit report, but the higher loan balance and longer term may slightly hurt your score. The bigger risk is being unable to sell the car if life changes.
Can I sell privately if I have negative equity?
Yes, but you must pay the difference at sale. If you owe $20 000 and sell for $17 000, you write a $3 000 check to the lender at closing. Some buyers walk away when they realize this — set realistic expectations.
Is leasing a way out of negative equity?
No. Most leases don't roll in negative equity, and the ones that do trap you worse — the residual is fixed regardless of your initial position. Pay down the negative equity first, then lease if you want.
