New Jersey DWI / DUI Defense
Charged with DWI in New Jersey? Don't plead until you talk to us.
A DWI conviction follows you for life. It can never be expunged. But DWI cases are also among the most technical charges in municipal court, and technical cases can be beaten. We challenge the stop, the field tests and the Alcotest itself.
What You're Facing
A traffic offense with criminal-level consequences
In New Jersey, driving while intoxicated (N.J.S.A. 39:4-50) is a motor vehicle offense, not a crime, and DWI and DUI mean the same thing here. Your case will be decided by a municipal court judge, with no jury. What's on the line is anything but minor: possible jail, an ignition interlock device, license forfeiture at higher tiers, mandatory program time and years of insurance surcharges.
New Jersey rewrote its DWI penalty structure effective December 1, 2019. The old system of automatic license suspensions for first offenders was largely replaced with ignition interlock requirements, a device wired into your car that requires an alcohol-free breath sample before the engine starts. For many first offenders that means you keep driving. But you pay for the device, you install it on the vehicle you principally operate, and your BAC reading decides how long you live with it. The rules changed again in February 2024 — shorter suspensions, pre-conviction installation credit, and more — and our interlock guide covers the current version tier by tier.
You can also be charged with DWI with no alcohol involved at all, since impairment by prescription medication, over-the-counter drugs or marijuana counts too. And if you declined the breath test, you are likely facing a second charge, refusal, with its own penalties. All of it is defensible, and the defense starts with the details of your stop and arrest.
First Offense
First-offense DWI penalties by BAC tier
Since December 1, 2019, a first alcohol DWI is tiered by blood alcohol concentration. Every tier also carries fines, court costs, a $1,000-per-year insurance surcharge for three years, Intoxicated Driver Resource Center (IDRC) time and the possibility of up to 30 days in jail.
| BAC at arrest | License suspension | Ignition interlock | Fine range |
|---|---|---|---|
| 0.08% to under 0.10% | None once the interlock is installed | 3 months | $250–$400 |
| 0.10% to under 0.15% | None once the interlock is installed | 7–12 months | $300–$500 |
| 0.15% or higher | 3 months following interlock installation | During the forfeiture plus 12–15 months after restoration | $300–$500 |
The interlock goes on the vehicle you principally operate, at your expense. Driving without it, or asking someone else to blow into it, creates new legal problems. The difference between a 0.14% and a 0.15% reading is the difference between no fixed forfeiture and a 3-month forfeiture with a year-plus of interlock afterward, which is one more reason the accuracy of the breath reading matters so much. Installing the interlock before conviction can earn day-for-two-days credit against the forfeiture and a waiver of the fine.
Second & Third Offense
Repeat offenses: where jail becomes mandatory
Prior convictions change everything. Jail stops being a possibility and becomes a requirement, and license loss returns in force.
Second offense
Mandatory jail of 48 hours up to 90 days, license suspension of 1 to 2 years, an ignition interlock during the suspension and for 2 to 4 years after restoration, a $500–$1,000 fine, 30 days of community service and 48 hours at the IDRC. A key defense issue is whether an old prior actually counts. Out-of-state convictions and decade-old cases raise real "step-down" arguments that can drop a second offense to first-offense treatment.
Third or subsequent offense
Mandatory 180 days in jail (a portion may be served in an approved inpatient treatment program), an 8-year license suspension, an interlock during suspension and for years after, a $1,000 fine and heightened surcharges. At this level a DWI case has to be treated like the serious litigation it is, with every element of the State's proof tested.
DWI Questions
What people ask us the night after the arrest
Is a DWI going to give me a criminal record?
No. DWI (N.J.S.A. 39:4-50) is a motor vehicle offense in New Jersey, not a crime (and DUI and DWI mean the same thing here). It is heard in municipal court by a judge alone; there is no jury. That does not make it minor: a conviction can still mean jail, license loss, an ignition interlock, thousands in fines and surcharges, and a permanent mark on your driving record.
Am I going to lose my license on a first offense?
For most first offenses since December 2019, no long suspension applies. Drivers in the two lower BAC tiers keep driving once an ignition interlock device is installed, for 3 months (BAC under 0.10%) or 7 to 12 months (0.10% to under 0.15%). Even at 0.15% or higher, the old 4-to-6-month suspension is gone: since February 2024 the forfeiture is 3 months following interlock installation, with the interlock staying on for 12 to 15 months after restoration.
Can I ever get a DWI off my record?
No. Expungement under N.J.S.A. 2C:52 applies to criminal records, and a New Jersey DWI is a traffic offense, not a crime, so nothing in the expungement statute reaches it. A DWI conviction stays on your driver history permanently. The only reliable way to keep it off your record is to fight the charge before conviction.
I refused the breath test. How much trouble am I in?
Refusal is a separate charge under N.J.S.A. 39:4-50.4a with its own interlock and license penalties, and it is usually filed alongside the DWI itself. New Jersey’s implied consent law means you agreed to breath testing when you accepted your license. Refusal cases turn on technical issues, like the statutory warning read to you and whether your response amounted to a refusal, and they can be fought.
Can my lawyer just plea bargain this down?
For decades the answer was no; New Jersey court policy barred plea agreements in DWI cases. That changed in early 2024: the law now authorizes plea agreements in DWI and refusal matters on the prosecutor's recommendation. What can be negotiated depends on the facts and the court, and the rules are still developing, which is exactly why you want a lawyer who handles these cases every week.
What is the IDRC everyone keeps mentioning?
The Intoxicated Driver Resource Center is a mandatory education and screening program for everyone convicted of DWI or refusal in New Jersey, typically 12 to 48 hours for a first offense, with program fees on top of your fines. The IDRC can also refer you for further treatment, and failing to complete it can lead to further license action or jail.
Refusal & Drug DWI
Refused the test? Charged after using drugs?
Breath test refusal — N.J.S.A. 39:4-50.4a
New Jersey's implied consent law means every licensed driver has already agreed to breath testing. Refusing is a separate offense charged alongside the DWI, carrying its own ignition interlock and license consequences that escalate sharply for repeat refusals, up to an 8-year suspension for a third. Refusal cases are technical. The officer must read the statutory warning correctly, and what counts as a "refusal" (silence, ambiguity, a claimed inability to blow) is genuinely litigable. Refusing also doesn't stop a DWI prosecution; the State can still try to prove impairment through the officer's observations, which cuts both ways at trial.
Drug-based DWI
Driving while impaired by any drug, whether illegal, prescribed or over-the-counter, is charged under the same statute. There is no breath machine for drugs, so the State leans on officer observations, drug recognition evaluations and blood or urine results, all of which are more subjective and more open to attack than an Alcotest number. Marijuana cases raise added problems for the prosecution, because THC can appear in testing long after any impairment has passed. A first drug DWI carries a license suspension of 7 to 12 months; the interlock-instead-of-suspension option is built around alcohol readings. See our marijuana DUI page for the full picture, and our drug charges overview if you were also charged with possession.
How We Fight DWI Cases
The State's case has to be perfect. It rarely is.
A DWI conviction requires a lawful stop, a properly conducted arrest and scientifically reliable evidence. We pull the discovery, meaning the video, calibration records and officer reports, and test every link in that chain.
The stop itself
Police need reasonable suspicion to pull you over. If the stop was bad, the evidence that followed it can be suppressed, and without evidence there is no case.
Field sobriety tests
Roadside balance-and-walk tests are graded subjectively, often at night, on uneven shoulders, by officers looking for failure. Age, weight, injuries and footwear all undermine them.
The Alcotest foundation
Under State v. Chun, the State must produce foundational documents, including calibration, certification and maintenance records, before a breath reading comes into evidence. Missing or flawed paperwork can sink the reading.
The 20-minute observation
Before a breath test, police must continuously observe you for 20 minutes to rule out anything that could distort the result. Interruptions, even brief ones, can render the reading inadmissible.
What Else You Should Know
The fine print clients don't hear about until it's too late
Every DWI and refusal conviction includes the Intoxicated Driver Resource Center, typically 12 to 48 hours of education and screening for a first offense, with fees and possible referral to treatment. Skipping it invites further license action or jail. And a DWI can never come off your record afterward: New Jersey's expungement law covers criminal records, and because DWI is a traffic offense rather than a crime, it falls outside the statute entirely. The conviction stays on your driving abstract for life, so the time to protect your record is before conviction, not after.
On plea agreements, the rules changed. For decades New Jersey flatly barred DWI plea bargaining. That ended in early 2024: the Legislature authorized plea agreements in DWI and refusal cases on the prosecutor's recommendation (P.L.2023, c.191), and the Supreme Court withdrew its long-standing guideline that had prohibited them. How much room a prosecutor has still varies case to case and court to court, which makes current, in-the-trenches municipal court experience worth more than ever.
A DWI stop also frequently produces companion tickets: reckless driving, lane violations, open container. We defend the whole event, not just the headline charge. See our traffic violations page for how those companion charges work.
A DWI never comes off your record.
A phone call is free.
Tell us about the stop. We'll tell you honestly whether your case can be fought, and exactly what you're facing if it isn't.
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Legal information on this page reviewed July 2026 against current New Jersey statutes. Laws change; nothing here is legal advice for your specific case.