NJ Lemon Law Buyback: How Your Refund Is Calculated
Winning a New Jersey lemon law case and getting your money back are two different things. Once a car qualifies as a lemon, the next question is simple. How much does the buyback actually pay?
The answer isn’t a guess or a round number. New Jersey uses a written formula for the NJ lemon law refund, and it uses two very different formulas depending on whether the car was bought new or used. This post puts those formulas side by side and runs real numbers through them so you can see how the math works.
If you’re new to the topic, the complete guide to the New Jersey lemon law covers the whole process, and our breakdown of what qualifies as a lemon for new cars in NJ covers the tests a car has to meet first. This article picks up where those leave off, at the money.
Two Laws, Two Refund Formulas
New Jersey has a New Car Lemon Law and a separate Used Car Lemon Law. They don’t share a refund formula. They don’t even make the same party pay. A new car buyback comes from the manufacturer, while a used car refund comes from the dealer that sold you the car.
Here’s the quick version before we break each one down.
| New Car Buyback | Used Car Refund | |
|---|---|---|
| Who pays | The manufacturer | The selling dealer |
| Starting point | Full purchase price, including trade-in credit | Purchase price |
| Sales tax and registration fees | Added back in | Left out |
| Finance charges, towing, rentals | Added back in | Not part of the formula |
| Main deduction | Miles at first repair visit times price, divided by 100,000 | IRS business mileage rate times every mile you drove |
| Extra deduction | None | Excessive wear and tear, if any |
| Replacement car option | Yes, but you can say no | No, the remedy is a repurchase |
How the New Car Lemon Law Buyback Is Calculated in New Jersey
The new car refund rule lives in N.J.S.A. 56:12-32. When a defect can’t be fixed within a reasonable time, the manufacturer has to take the car back and give a full refund of the purchase price. The state’s regulation, N.J.A.C. 13:45A-26.11, spells out the same pieces line by line.
What Gets Added In (the Collateral Charges)
People often search for “collateral charges” and “incidental damages.” New Jersey’s statute doesn’t use those labels. It simply lists what goes into the refund.
- The full purchase price, including any credit you got for a trade-in
- Options or add-ons the manufacturer or dealer installed within 30 days of delivery
- Sales tax, license fees, and registration fees
- Finance charges
- Towing costs
- Actual rental car costs while the car was out of service for the defect
The regulation also lists the Division filing fee and reasonable attorney’s fees, expert fees, and costs as items in the refund computation. One catch applies to trade-ins. If a trade-in credit grossly exceeds the real value of the old car, it can be excluded, and the manufacturer carries the burden of proving that.
The NJ Lemon Law Mileage Offset
Then comes the deduction. Some people call it a mileage offset or a personal use deduction. The statute calls it a “reasonable allowance for vehicle use,” and N.J.S.A. 56:12-30 defines it with a fixed formula.
New car use allowance = miles on the car at the first repair visit for the defect × purchase price (or lease price) ÷ 100,000
Notice what the formula counts. It’s not the miles on the car when you hand back the keys. It’s the odometer reading the first time you brought the car in for that defect. Every mile driven after that first visit doesn’t increase the deduction at all.
How the NJ Used Car Lemon Law Refund Is Calculated
Used cars run on a different rule. Under N.J.S.A. 56:8-71, a dealer that can’t fix a covered defect has to repurchase the car and refund the purchase price. The math is set out in N.J.A.C. 13:45A-26F.14.
The refund starts with the total purchase price. Then four things come out of it.
- All sales taxes
- Title and registration fees, or similar government charges
- A reasonable allowance for excessive wear and tear, if there is any
- A deduction for personal use
The personal use deduction is defined in N.J.A.C. 13:45A-26F.2. It uses the IRS business mileage rate in effect on the date the dealer repurchases the car, multiplied by every mile you drove from the day you bought it until the repurchase.
Used car personal use deduction = IRS business mileage rate on the repurchase date × total miles you drove
That rate moves. According to the IRS standard mileage rates page, the 2026 business rate was 72.5 cents per mile from January through June, then rose to 76 cents per mile starting July 1, 2026. So the same miles can cost a little more or less depending on when the buyback closes.
Watch the difference: The new car formula freezes the deduction at your first repair visit. The used car formula keeps counting every mile until the repurchase. On a used car, time spent driving while a dispute drags on shows up in the math.
Worked Example 1: A New SUV in Springfield
Say Tamara buys a new Chevy Equinox from a dealer on Route 22 in Springfield. The price is $36,000, and that includes a $6,000 trade-in credit for her old sedan. The dealer installs remote start and floor liners for $650 at delivery. She pays $2,385 in sales tax and $300 in title and registration fees, and she finances the rest.
At 1,800 miles, the engine starts losing coolant and overheating. She brings it in. It goes back several more times over the next few months, and she rents a car for 12 days at $45 a day. One overheat on Route 78 costs her a $150 tow. By the time the manufacturer buys the car back, she has paid $1,150 in finance charges.
Adding It Up
- Purchase price, including the trade-in credit: $36,000
- Dealer-installed options: $650
- Sales tax: $2,385
- Title and registration: $300
- Finance charges paid: $1,150
- Towing: $150
- Rental car (12 days at $45): $540
That totals $41,175. Now the use allowance. Using the $36,000 vehicle price, the math is 1,800 × $36,000 ÷ 100,000, which comes to $648.
Tamara’s estimated buyback: $41,175 minus $648 = $40,527. Part of that goes to her lender to pay off the loan, since New Jersey law sends refunds to the consumer and any lienholder based on their interests.
Worked Example 2: Same Car, Later First Repair
Now say Derek in Mount Laurel buys the exact same Equinox on the exact same terms. The difference is timing. His overheating problem doesn’t show up until 14,500 miles, still inside New Jersey’s coverage window of two years or 24,000 miles.
His use allowance is 14,500 × $36,000 ÷ 100,000, which comes to $5,220. Assuming every other number matches Tamara’s, his estimated buyback is $41,175 minus $5,220, or $35,955.
Same car, same price, a difference of $4,572. The only thing that changed was the odometer reading on the first repair order. That’s why the date and mileage on that first visit matter so much in a new car buyback calculation.
Worked Example 3: A Used Sedan in Jersey City
Say Luz buys a 2020 Nissan Altima with 47,000 miles from a used car dealer in Jersey City. She pays $17,500, plus $1,159 in sales tax and $250 in title and registration fees. Because the car had between 24,000 and 60,000 miles at sale, the dealer’s required warranty runs 60 days or 2,000 miles, whichever comes first.
The engine starts misfiring in the first month. Three repair attempts later it’s still misfiring, and the dealer repurchases the car in October 2026. By then Luz has driven it 1,600 miles. She also cracked the front bumper cover on a parking garage pillar, and the dealer values that at $300 as excessive wear and tear.
- Purchase price: $17,500
- Sales tax and title fees: not included in the refund
- Personal use deduction: 1,600 miles × $0.76 = $1,216
- Excessive wear and tear: $300
Luz’s estimated refund: $17,500 minus $1,216 minus $300 = $15,984.
If the same repurchase had closed in May 2026, the rate would have been 72.5 cents, and the deduction would have been $1,160 instead. Small difference, but it shows how the date plugs into the formula.
Compare Luz’s result to Tamara’s. Tamara got her sales tax, fees, and finance charges back. Luz’s refund formula leaves taxes and government fees out entirely. That’s one of the biggest practical gaps between the two New Jersey laws. The used car lemon law eligibility rules explain which cars fall under that second law in the first place.
How Leased Vehicles Are Refunded in New Jersey
Leases follow a split approach under N.J.S.A. 56:12-32. The lessee gets back what was actually paid under the lease, minus a use allowance based on the lease price instead of a purchase price. The leasing company is paid separately, and no early termination penalty can be charged. Our post on the New Jersey lemon law for leased cars runs a full worked example of that split.
Lemon Law Replacement Vehicle vs. Refund
Under the New Car Lemon Law, a manufacturer may offer to replace the car instead of buying it back. The consumer doesn’t have to accept. The statute lets the consumer reject the replacement offer and demand a refund instead.
If a replacement is accepted, the manufacturer has to make sure any loan on the old car transfers to the new one. Say Tamara took a replacement Equinox instead of the $40,527 refund. The lien on her Equinox would transfer to the replacement car.
Either way, the returned car doesn’t vanish. New Jersey brands its title before it can be resold, as our post on what a lemon title in NJ means explains.
The Used Car Lemon Law works differently. N.J.S.A. 56:8-71 talks about the dealer repurchasing the car and refunding the price. It doesn’t set up a replacement option the way the new car law does.
How New Jersey Compares to Federal Warranty Law
The federal Magnuson-Moss Warranty Act also talks about refunds. Under a “full” warranty, a product that can’t be fixed after a reasonable number of tries must be refunded or replaced at the consumer’s choice. Most new car warranties are labeled “limited” rather than “full,” though, so that federal refund rule often doesn’t apply to a car warranty directly.
What federal law doesn’t give you is New Jersey’s built-in math. The state statute names the exact items in the refund and the exact deduction formula. Neighboring states like New York and Connecticut write their own formulas too, so a buyback number from one state doesn’t carry over to another.
Formula vs. Settlement Amount
A lot of buybacks never reach a final decision. They settle. New car disputes can go through the New Jersey Lemon Law Unit, which sends contested cases to a hearing before an administrative law judge, and many end in an agreement before the hearing date. Our guide to the NJ lemon law hearing process walks through those steps.
The statutory formula still matters in a settlement. It gives both sides the same reference point. A proposed settlement amount can be checked against what the formula would produce, line by line.
Common Questions About NJ Lemon Law Refunds
Do you get your down payment back under the NJ lemon law?
For a new car, the refund is built on the full purchase price, so money put down is part of what’s being refunded. A trade-in credit counts too. The use allowance is then subtracted from the total.
Does the NJ lemon law cover rental car reimbursement?
For new cars, yes. The statute includes actual rental expenses, but only for the time the car was out of service because of the defect. Those are the same days tracked under the NJ lemon law 20 day rule. Receipts are what prove those costs, and the regulation lists rental receipts among the documents that go with a Lemon Law Unit application.
Is the mileage offset based on current miles?
Not for new cars. The new car allowance uses the mileage at the first repair visit for the defect. For used cars, the deduction uses every mile driven from purchase until the dealer repurchases the car.
Can you trade in a lemon car instead?
People do trade in problem cars, but a trade-in is a private deal with a dealer, not a lemon law remedy. The trade-in value is whatever the dealer offers. A lemon law buyback follows the statutory formula covered above.
Who pays attorney fees in a New Jersey lemon law case?
For new car cases decided through the state program, N.J.A.C. 13:45A-26.11 lists reasonable attorney’s fees, expert witness fees, and costs among the items in the refund computation. In other words, those costs are built into what the manufacturer pays rather than coming out of the consumer’s refund.
The Bottom Line on NJ Lemon Law Refund Calculations
A New Jersey new car buyback adds back taxes, fees, finance charges, towing, and rentals, then subtracts a use allowance frozen at the first repair visit. A used car refund leaves taxes and fees out and subtracts the IRS mileage rate for every mile driven, plus any excessive wear. Same state, very different numbers.
This article is for educational purposes only and is not legal advice. Reading it does not create an attorney-client relationship. For advice on your specific situation, consult a licensed attorney in your state.