How to Trade In a Car (Even If You Still Owe on It)
Trading in your car is the fastest way to turn the vehicle you have into money toward the one you want. It works the same whether you own your car outright or still have a loan on it. Here's how it works in Utah, what to bring, and how to get a fair number.
Step 1: Know your numbers before you go
- Your trade-in value. Start with an online estimate. Our Value Your Trade tool gives you a number in a couple of minutes based on your car's year, miles, options and condition.
- Your loan payoff. If you still owe money, call your lender or check its app for a "10-day payoff." That's the exact amount needed to close the loan, and it's usually a little different from the balance on your statement.
- Your equity. Trade-in value minus payoff. If the result is positive, that's money toward your next vehicle. If it's negative, see Step 4.
Step 2: Gather what to bring
- Your title, if you own the car outright (if there's a loan, the lender has it)
- Lender name and loan account number, if you still owe on it
- Current registration and your driver's license
- Every key and fob you have (a missing fob can lower the offer)
- Service records, if you have them
Step 3: Get it ready
A clean car appraises better. Clean it inside and out, take your personal items out, and handle cheap fixes like burned-out bulbs or wiper blades. Skip big repairs: you rarely get back what you spend on them.
Step 4: Trading in a car you still owe on
You don't need to pay off your loan first. When you trade in a financed car, the dealership pays your lender directly and the title comes to us. What happens next depends on your equity:
- Positive equity (the car is worth more than you owe): the difference goes toward your next vehicle like a down payment.
- Negative equity (you owe more than it's worth): you can pay the difference, roll it into your next loan, or wait until you owe less. Rolling it in is convenient, but it makes the new loan bigger, so look at the total cost, not just the monthly payment. Our finance team can walk you through the options.
Step 5: Get the appraisal and compare
An in-person appraisal checks things an online tool can't: tire and brake wear, warning lights, body damage and how the car drives. Ask what drove the number. If you have an offer from somewhere else, bring it.
Trading in vs. selling it yourself
A private sale can bring a higher price, but you handle the listing, the calls, the test drives, the payment and the loan payoff yourself. A trade-in takes one visit. In Utah it also saves on sales tax: you pay sales tax on the price of your next vehicle after your trade-in value is subtracted. On a $35,000 truck with a $15,000 trade-in, you're taxed on $20,000 instead of $35,000.
Frequently asked questions
Can I trade in a car that isn't paid off?
Yes. We pay off the loan as part of the deal. You just need your lender's name and account number.
Can I sell you my car without buying one?
Yes. National Auto Plaza buys cars, trucks and SUVs outright. Start with Value Your Trade.
Does Utah charge sales tax on my trade-in?
No. Utah taxes the purchase price after the trade-in value is subtracted, which is one of the biggest advantages of trading in instead of selling privately.
What lowers a trade-in offer the most?
Warning lights, accident history, worn tires, missing keys and heavy interior wear. High miles matter too, but condition and history often matter more.
Ready to see what yours is worth?
Get your number with Value Your Trade, browse our used inventory for your next vehicle, or apply for financing online. National Auto Plaza is at 10790 S State St in Sandy (get directions). More guides are on our Truck & Car Buying Guides page.