Cost of new vehicle
- Trade in value of current vehicle
+ Payoff on current loan
+ Any taxes, dealer fees, ... that will be added to loan
= Amount of loan for new vehicle
$25,000 = cost of new vehicle
$4,000 = value of current vehicle
$2,000 = current loan payoff
$2450 = taxes & fees
25000 - 4000 + 2000 + 2450 = 25,450 = amount of new loan.
Better yet, pay off the current loan and save your money until you can afford to buy your new ride without needing a new loan.
Keep in mind that free advice can frequently be worth less than you pay for it.