
What Is an OUI and What Are the Consequences in Massachusetts?
In Massachusetts, the offense commonly called drunk driving or drugged driving is legally known as Operating Under the Influence, or OUI. People often use the terms DUI or DWI when searching for information, but Massachusetts law uses OUI.
An OUI charge can have consequences beyond the criminal case. Depending on the circumstances, it may affect your driver’s license, insurance, employment, professional responsibilities, and ability to drive to work or care for your family. The consequences also change significantly depending on whether the case is treated as a first or subsequent offense.
Understanding what the Commonwealth must prove, what penalties may apply, and how license consequences differ from the criminal case can help you make informed decisions after an arrest.
What Is an OUI in Massachusetts?
Operating Under the Influence is governed primarily by Massachusetts General Laws Chapter 90, Section 24.
Under the statute, a person can be charged with OUI for operating a motor vehicle on a public way or in another place covered by the law while:
- Under the influence of intoxicating liquor;
- Under the influence of marijuana;
- Under the influence of certain narcotic drugs, depressants, or stimulant substances;
- Under the influence of certain toxic vapors; or
- Operating with a blood alcohol concentration of 0.08% or greater.
An OUI case does not always involve a breath-test result. The Commonwealth may attempt to prove impairment through driving behavior, officer observations, field sobriety tests, statements, video, witness testimony, blood evidence, or other circumstances.
What Is the Difference Between OUI, DUI, and DWI?
For a Massachusetts criminal case, the primary difference is terminology.
OUI means Operating Under the Influence and is the term used in Massachusetts law. DUI generally means Driving Under the Influence, while DWI generally means Driving While Intoxicated or Impaired. Those terms are commonly used in other states and by the public.
If you were arrested in Massachusetts, your charge and defense will be governed by Massachusetts OUI law regardless of whether you searched online for OUI, DUI, or DWI.
What Must the Commonwealth Prove in an OUI Case?
The Commonwealth has the burden of proving the charged offense beyond a reasonable doubt.
In a typical impairment-based OUI case, the prosecution must establish that:
- You operated a motor vehicle;
- You operated on a public way or another place covered by Massachusetts law; and
- You were under the influence of alcohol, drugs, marijuana, or another substance covered by the statute while operating.
In an alcohol case, the Commonwealth may instead or additionally pursue a theory based on admissible evidence that your blood alcohol concentration was 0.08% or greater.
An arrest by itself does not establish any of these elements. Each element must be supported by admissible evidence.
What Happens After an OUI Arrest in Massachusetts?
The exact process depends on the circumstances, but an OUI arrest may involve:
- Booking and processing at the police station;
- Breath testing or chemical-test-refusal paperwork;
- Immediate license consequences;
- Bail or release from police custody;
- An arraignment in District Court;
- Pretrial conferences and discovery;
- Motions concerning evidence or statements; and
- A negotiated disposition or trial.
At arraignment, a plea is entered and the court may address bail or other release conditions. Additional court dates are then scheduled.
One reason to review an OUI case promptly is that the criminal case and the driver’s-license issue do not always follow the same timetable. Some license-related deadlines arise very soon after the arrest.
What Evidence May Be Used in an OUI Case?
The prosecution may rely on a combination of direct and circumstantial evidence, including:
- The reason police stopped or approached the vehicle;
- Driving behavior or a reported crash;
- Odor of alcohol or another substance;
- Speech, balance, coordination, or appearance;
- Statements about drinking or drug use;
- Field sobriety tests;
- Breath-test or blood-test evidence;
- Body-camera, cruiser, or booking video;
- Witness statements; and
- Police testimony.
Those observations do not necessarily establish impairment. Injuries, medical conditions, fatigue, anxiety, poor road conditions, footwear, weather, lighting, or other circumstances may provide alternative explanations for what an officer observed.
For a closer look at how police and prosecutors use field sobriety tests, breath evidence, observations, video, and other evidence, see How Is an OUI Proven in Massachusetts? Evidence, Field Sobriety Tests & Defenses.
What Are the Penalties for a First OUI in Massachusetts?
Under Massachusetts General Laws Chapter 90, Section 24, the basic statutory penalty for an OUI conviction includes a fine of $500 to $5,000, imprisonment for up to 2 1/2 years, or both.
That does not mean every first-offense OUI case results in jail. Massachusetts law also provides a separate first-offender disposition under Section 24D for qualifying cases.
In addition to criminal penalties, an OUI conviction can result in a driver’s-license suspension. The Massachusetts RMV currently lists the standard suspension periods following an OUI conviction as:
- First offense: 1 year;
- Second offense: 2 years;
- Third offense: 8 years;
- Fourth offense: 10 years; and
- Fifth offense: lifetime.
These are conviction-related suspension periods. Chemical-test refusal, breath-test failure, hardship licensing, and other RMV issues can involve different rules.
For a more detailed discussion of those issues, see OUI License Suspension in Massachusetts.
What Is a Section 24D First-Offender Disposition?
Massachusetts General Laws Chapter 90, Section 24D provides an alternative disposition for qualifying OUI cases.
Under Section 24D, a qualifying defendant who consents may be placed on probation for up to two years and assigned to a Driver Alcohol Education Program. The court may also require treatment or rehabilitation when appropriate.
For a qualifying person who was age 21 or older at the time of the offense, Section 24D provides for a license suspension of not less than 45 days and not more than 90 days. Different rules apply to drivers who were under 21.
A person entering a qualifying Section 24D program may also apply to the RMV for consideration of a hardship license. Approval is discretionary and may be affected by other suspensions or license restrictions.
A 24D disposition is not automatic, and whether it is available or appropriate depends on the person’s history and circumstances of the case.
What If You Have One Older OUI on Your Record?
Massachusetts law contains an important provision for some defendants who have one prior similar OUI disposition that occurred at least 10 years before the new offense.
Section 24D states that, once in a person’s lifetime, the statute may also apply when there is a single prior qualifying OUI conviction or program assignment from 10 or more years before the new offense.
This is sometimes referred to as a Cahill disposition, based on the Massachusetts case interpreting this provision.
Eligibility does not mean the judge is required to impose a Section 24D disposition. The defendant’s record, timing of the prior case, current charge, and other circumstances still matter.
What Happens if You Refuse a Chemical Test?
Refusing a chemical test after an OUI arrest is different from being convicted of OUI, but the refusal can trigger an immediate administrative license suspension.
The length of a chemical-test-refusal suspension depends on factors such as age and prior qualifying OUI history. Massachusetts law also provides a short deadline to seek an RMV hearing to challenge a refusal suspension.
Because refusal cases have their own procedures and deadlines, they should not be confused with the criminal OUI prosecution or a suspension resulting from a failed breath test.
The Massachusetts RMV provides current information about alcohol- and drug-related license suspensions.
Could an Ignition Interlock Device Be Required?
Possibly. Ignition interlock requirements depend on the driver’s record and the type of license being sought.
The Massachusetts RMV requires ignition interlock devices for certain multiple OUI offenders. In addition, certain first offenders seeking a hardship license may be subject to an ignition-interlock requirement when the breath-test result associated with the offense was 0.15% or greater.
You can review current requirements through the RMV’s Ignition Interlock Device Program.
For more information about repeat-offender and ignition-interlock requirements, see Melanie’s Law and Massachusetts OUI Charges.
What Are Common Defense Issues in an OUI Case?
An OUI charge is not the same as a conviction. The appropriate defense depends on the evidence in the individual case.
Issues an attorney may review include:
- The traffic stop: Did police have a lawful basis to stop or seize the vehicle?
- Operation: Can the Commonwealth prove that the defendant operated the vehicle?
- Public way: Did the alleged operation occur in a place covered by the statute?
- Impairment: Does the evidence actually establish diminished ability to operate safely?
- Field sobriety testing: Were the tests administered and interpreted appropriately?
- Medical or physical conditions: Could another condition explain balance, speech, appearance, or test performance?
- Breath or blood evidence: Is the test result admissible and supported by the required procedures?
- Video and witness evidence: Does independent evidence match the police report?
- Statements: Were statements obtained lawfully and are they being accurately characterized?
The strength of an OUI case should be evaluated from the actual evidence rather than from the fact that an arrest occurred.
What Should You Do if You Are Charged With OUI?
Keep the paperwork provided by the police, RMV, bail commissioner, and court. Pay attention to both your court date and any license-related deadlines.
You should also avoid driving if your license or right to operate has been suspended. Operating while suspended can create a separate criminal charge. For information about that offense, see Operating on a Suspended License in Massachusetts.
An attorney reviewing an OUI case may examine the police report, video, chemical-test evidence, field sobriety tests, driving record, license paperwork, witness statements, and the circumstances surrounding the stop and arrest.
Talk With a Massachusetts OUI Defense Attorney
The consequences of an OUI charge depend on the evidence, prior record, license status, and eventual court disposition. The Law Offices of Elliot Savitz & Scott Bradley represent people facing OUI, DUI, and DWI charges throughout Massachusetts.
If you have been charged with OUI in Massachusetts, contact us today to discuss the charge, potential license consequences, and the defense issues that may apply to your case.
This article provides general information about Massachusetts law and is not legal advice. Reading it does not create an attorney-client relationship. OUI penalties, license consequences, and available defenses depend on the specific facts, prior record, and disposition of each case.



