A drunk driving charge in New Jersey is a traffic offense, not a crime, but the penalties can be harsher than many low-level criminal convictions. A single DWI can mean thousands of dollars in fines and surcharges, an ignition interlock device on your car, a stay at an Intoxicated Driver Resource Center, and possible jail time. Prior convictions make every one of those penalties steeper.
This guide sets out the current NJ DWI penalties under N.J.S.A. 39:4-50 and the breath-test refusal statute, N.J.S.A. 39:4-50.4a. It reflects the ignition interlock reforms that took effect in December 2019, which the Legislature extended through January 1, 2029. If you were charged in Freehold, Middletown, Howell, Asbury Park or any other Monmouth County town, call Keith Oliver Criminal Law at (732) 858-6959 to discuss your case.
NJ DWI Penalties at a Glance
New Jersey sets DWI penalties by two things: how many prior DWI convictions you have, and, for a first offense, your blood alcohol concentration (BAC). The table below summarizes the range a municipal court judge can impose.
| Offense | Fine | Jail | License forfeiture | Ignition interlock |
|---|---|---|---|---|
| 1st offense, BAC .08%–.099% | $250–$400 | Up to 30 days | Until interlock is installed | 3 months |
| 1st offense, BAC .10%–.149% | $300–$500 | Up to 30 days | Until interlock is installed | 7 months–1 year |
| 1st offense, BAC .15% or higher | $300–$500 | Up to 30 days | 4–6 months | During forfeiture + 9–15 months |
| 1st offense, drug DWI | $300–$500 | Up to 30 days | 7 months–1 year | Not applicable |
| 2nd offense | $500–$1,000 | 48 hours–90 days + 30 days community service | 1–2 years | During forfeiture + 2–4 years |
| 3rd or later offense | $1,000 | 180 days | 8 years | During forfeiture + 2–4 years |
On top of the court penalties, the New Jersey Motor Vehicle Commission (MVC) adds an insurance surcharge of $1,000 per year for three years. Court costs and statutory fees also apply, including a $100 Drunk Driving Enforcement Fund fee and a $100 Alcohol Education, Rehabilitation and Enforcement Fund fee.
First Offense DWI Penalties by BAC
For a first offense, the most important number is your BAC reading on the Alcotest. New Jersey divides first offenders into three tiers.
BAC of .08% to under .10%
This is the lowest tier. The fine is $250 to $400, and the judge may impose up to 30 days in jail, although jail is rare for a first offense. You must complete 12 to 48 hours at the Intoxicated Driver Resource Center (IDRC). Instead of a traditional suspension, your license is forfeited only until you install an ignition interlock device, which stays on your car for three months.
BAC of .10% to under .15%
The fine rises to $300 to $500, with the same possible 30 days in jail and IDRC requirement. Your license is forfeited until an interlock is installed, and the device stays on for seven months to one year.
BAC of .15% or higher
At this level the penalties jump. You face a $300 to $500 fine and the same IDRC requirement, plus a license forfeiture of four to six months. The interlock must be installed during the forfeiture and kept on for another nine to fifteen months after your license is restored.
Drug DWI
A DWI based on drugs, including marijuana, carries a fine of $300 to $500 and a license forfeiture of seven months to one year. An interlock does not detect drugs, so drivers charged with drug DWI are not eligible for the interlock credit that can shorten a suspension.
Second Offense DWI Penalties
A second DWI conviction brings mandatory jail time. The judge must impose at least 48 consecutive hours in jail and can impose up to 90 days. You also face:
- A fine of $500 to $1,000
- 30 days of community service
- A license forfeiture of one to two years
- An ignition interlock during the forfeiture and for two to four years after your license is restored
- IDRC detainment of 48 hours and any treatment the IDRC recommends
- An MVC surcharge of $1,000 per year for three years
Third Offense DWI Penalties
A third or subsequent DWI is the most serious level. The law requires 180 days in the county jail. The judge may reduce up to 90 of those days for time spent in an approved inpatient rehabilitation program. The fine is $1,000, the license forfeiture is eight years, and an interlock is required during the forfeiture and for two to four years afterward. If the third offense comes within three years of the prior one, the MVC surcharge rises to $1,500 per year for three years.
The 10-Year Step-Down Rule
New Jersey gives some relief to drivers whose prior DWI is old. If your second offense happens more than 10 years after your first, the court sentences you as a first offender. If your third offense happens more than 10 years after your second, you are sentenced as a second offender. The older conviction still stays on your driving record, so it is important to review your full abstract before your first court date.
Breath Test Refusal Penalties
Refusing to provide breath samples is a separate violation under N.J.S.A. 39:4-50.4a. You can be convicted of refusal even if the State cannot prove you were intoxicated, and a refusal conviction can run alongside a DWI conviction.
| Refusal | Fine | License forfeiture | Ignition interlock |
|---|---|---|---|
| 1st refusal | $300–$500 | Until interlock is installed | 9–15 months after restoration |
| 2nd refusal | $500–$1,000 | 1–2 years | During forfeiture + 2–4 years |
| 3rd or later refusal | $1,000 | 8 years | During forfeiture + 2–4 years |
Refusal also carries the same $1,000-per-year MVC surcharge for three years and requires completion of the IDRC program.
How the Ignition Interlock Credit Works
Recent amendments let many drivers install an ignition interlock device after arrest, before the case is resolved. Drivers who do so can earn a credit of one day against the license forfeiture for every two days the device is installed. For a driver facing a long forfeiture, early installation can mean getting back on the road much sooner.
The credit is not available if the DWI caused serious bodily injury to another person, if the charge is a drug-based DWI, or if the driver was operating a commercial vehicle under the influence of a controlled substance. Whether early installation makes sense depends on the strength of the State’s case, so speak with a lawyer before you install a device.
Penalties That Can Make a DWI Worse
Certain facts expose you to additional charges that run on top of the standard DWI penalties:
- DWI with a child under 17 in the car, which is a separate disorderly persons offense with its own license suspension
- Assault by auto or other criminal charges if someone was injured in a crash
- Driving while suspended for a DWI, which can carry mandatory jail
- A commercial driver’s license (CDL) disqualification, which applies even when you were driving your personal car
Hidden Costs of a DWI Conviction
The fine is often the smallest part of the bill. When you add the three-year surcharge, IDRC fees, the cost of leasing and monitoring an interlock device, and higher car insurance premiums, a first-offense DWI can cost $10,000 or more over three years. A DWI also stays on your driving record permanently and cannot be expunged, because it is a traffic offense rather than a criminal conviction. It can affect employment that involves driving, professional licenses and travel to Canada.
Can a DWI Charge Be Fought in Monmouth County?
Yes. New Jersey strictly limits plea bargaining in DWI cases, which makes a strong defense even more important. Common defenses include:
- Challenging the reason for the traffic stop
- Attacking the Alcotest results, including the 20-minute observation period, calibration records and operator certification
- Questioning field sobriety test instructions and police video
- Contesting whether you were actually operating the vehicle
- Raising medical conditions that can affect breath readings
Monmouth County DWI cases are heard in the municipal court of the town where the arrest occurred, such as Freehold Borough, Freehold Township, Middletown, Howell, Wall or Long Branch. An experienced Freehold criminal defense lawyer can request discovery, review the body camera and Alcotest data, and identify problems in the State’s case.
Frequently Asked Questions About NJ DWI Penalties
Is a first DWI a crime in New Jersey?
No. A DWI in New Jersey is a motor vehicle offense heard in municipal court, so it does not create a criminal record. However, it stays on your driving record permanently and carries fines, surcharges, IDRC classes and an ignition interlock requirement.
Will I go to jail for a first DWI in NJ?
A judge can impose up to 30 days in jail for a first offense, but jail is uncommon. Every first offender must complete 12 to 48 hours at the Intoxicated Driver Resource Center (IDRC).
How long is the ignition interlock for a first DWI in NJ?
It depends on your BAC. With a BAC of .08% to under .10%, the interlock stays on for three months. With a BAC of .10% to under .15%, it is seven months to one year. With a BAC of .15% or higher, it is required during a four-to-six-month forfeiture and for nine to fifteen months afterward.
What happens if I refuse a breathalyzer in New Jersey?
Refusal is a separate violation. A first refusal carries a $300 to $500 fine, license forfeiture until an interlock is installed, an interlock for nine to fifteen months after restoration, IDRC classes and a $1,000-per-year MVC surcharge for three years.
Can a DWI be expunged in New Jersey?
No. Because a DWI is a traffic offense rather than a criminal conviction, it cannot be expunged and remains on your New Jersey driving record permanently.
Does an old DWI count against me?
If more than 10 years pass between offenses, the court sentences you one level lower. For example, a second offense more than 10 years after the first is sentenced as a first offense.
Talk to a Monmouth County DWI Lawyer
The penalty ranges in this guide are what the law allows, not what must happen in your case. The facts of your stop, the reliability of the evidence and your prior record all matter. Keith Oliver Criminal Law defends drivers charged with DWI and refusal throughout Monmouth County. Call (732) 858-6959 or contact us online to schedule a consultation.
This guide provides general information about New Jersey DWI law as of 2026 and is not legal advice. Penalties can change; the 2019 interlock reforms are currently set to expire on January 1, 2029 unless extended.
