Arizona DUI Laws Explained: First Offense vs. Aggravated DUI
Arizona has some of the toughest DUI laws in the United States. While many people think all DUI cases are treated the same, Arizona law distinguishes between a standard (misdemeanor) DUI and an aggravated DUI (felony DUI). The difference can mean the difference between serving days in jail versus facing years in prison and becoming a convicted felon.
Understanding how Arizona classifies DUI offenses is critical if you have been arrested or are under investigation.
At Millar Law, we defend clients throughout Arizona who are charged with DUI offenses ranging from first-time misdemeanor DUIs to complex felony aggravated DUI cases. This guide explains the key differences between a first-offense DUI and an aggravated DUI, the penalties involved, and the defenses that may be available.
Quick Answer
A first-offense DUI is typically a misdemeanor unless certain circumstances exist.
An aggravated DUI is a felony and may be charged when, among other situations:
You commit DUI while your driver's license is suspended, revoked, canceled, or refused.
You commit a third DUI within 84 months (7 years).
You commit DUI with a child under 15 years old in the vehicle.
You are required to drive only with a certified ignition interlock device (IID) installed, and you drive a vehicle not equipped with one while committing DUI.
You commit a DUI while driving on the wrong side of the highway.
Felony DUI convictions carry substantially more severe penalties, including mandatory prison in many cases.
Arizona's Basic DUI Laws
Arizona prohibits operating or being in actual physical control of a vehicle:
While impaired to the slightest degree by alcohol or drugs (A.R.S. § 28-1381(A)(1)); or
With a blood alcohol concentration (BAC) of 0.08% or higher within two hours of driving, subject to statutory requirements (A.R.S. § 28-1381(A)(2)).
Arizona also has separate provisions for:
Extreme DUI (BAC of 0.15% to less than 0.20%)
Super Extreme DUI (BAC of 0.20% or more)
These offenses remain misdemeanors unless circumstances elevate the case to an aggravated DUI.
What Is a First-Offense DUI in Arizona?
A DUI arrest does not automatically mean a first-offense DUI for sentencing purposes. Prior DUI convictions and other circumstances matter. However, if you have no qualifying prior DUI convictions and no aggravating factors, your case will generally be prosecuted as a misdemeanor.
Depending on the facts, prosecutors may charge:
DUI while impaired to the slightest degree
DUI with a BAC of 0.08% or more
Extreme DUI
Super Extreme DUI
Penalties for a First-Offense DUI
Penalties vary depending on the charge, BAC level, and case facts.
For a standard first-offense misdemeanor DUI, potential consequences include:
Mandatory jail time (with the possibility of reduced actual jail time in some cases if statutory conditions are met)
Fines, fees, and assessments
Driver's license consequences imposed through the Arizona Motor Vehicle Division (MVD)
Alcohol screening, education, or treatment
Community restitution
Installation of an ignition interlock device (IID), depending on the offense and applicable law
Higher BAC levels generally result in more severe mandatory minimum penalties.
Because Arizona's DUI statutes are detailed and penalties change periodically through legislative action, it is important to consult current law and experienced legal counsel regarding the specific penalties applicable to your case.
What Is an Aggravated DUI?
An aggravated DUI is a felony under A.R.S. § 28-1383.
The DUI becomes aggravated because of certain legally defined circumstances—not necessarily because the driver was more impaired.
Common Reasons a DUI Becomes an Aggravated DUI
1. DUI While Your License Is Suspended, Revoked, Canceled, or Refused
One of the most common aggravated DUI charges occurs when a person drives under the influence while their driving privilege has been suspended, revoked, canceled, or refused.
This often surprises people who were unaware their license had been suspended or who were driving despite an unresolved MVD issue.
Whether the State can prove the required elements depends on the facts of the case.
2. Third DUI Within 84 Months
Arizona law allows a felony aggravated DUI charge if a person commits a third qualifying DUI offense within 84 months (7 years).
Calculating whether prior convictions qualify can be more complicated than many people realize. Prior convictions, timing, and the applicable statutes all matter.
3. DUI With a Child Under 15 in the Vehicle
Driving under the influence while a child under the age of 15 is in the vehicle can result in an aggravated DUI charge.
This provision reflects Arizona's policy of imposing harsher penalties when children are placed at risk.
4. DUI While Required to Use an Ignition Interlock Device
If a person is required to operate only vehicles equipped with a certified ignition interlock device and commits DUI while driving a vehicle that does not comply with that requirement, prosecutors may pursue an aggravated DUI charge under Arizona law.
5. DUI while Driving on the Wrong Side of the Highway
If a person commits a DUI while driving on the wrong side of a highway, it is an aggravated felony DUI. "Wrong way" means a vehicle’s movement that is in a direction opposing the legal flow of traffic.
NOTE: “highway” does not necessarily mean only an actual “highway,” as most would assume. It can also mean a side street, residential public street, county road, etc.
Is Every Aggravated DUI the Same?
No. Arizona recognizes several different aggravated DUI offenses, and the felony classification may vary depending on the specific subsection and circumstances.
Some aggravated DUI offenses are classified as Class 4 felonies, while others may be charged differently under Arizona law.
The potential sentence depends on:
Your criminal history
The specific aggravated DUI allegation
Whether dangerous or repetitive offender statutes apply
Any aggravating or mitigating circumstances
Does an Aggravated DUI Always Require Prison?
Almost always, yes. Most aggravated DUI convictions carry mandatory prison requirements.
For example, a conviction for a Class 4 aggravated DUI under certain subsections of A.R.S. § 28-1383 generally requires a minimum term of imprisonment before a defendant becomes eligible for probation, unless a specific statutory exception applies.
The exact sentencing consequences depend on the subsection charged and the individual's criminal history.
Because prison exposure can be significant, anyone facing an aggravated DUI should seek legal counsel immediately.
First-Offense DUI vs. Aggravated DUI
First-Offense DUI:
Usually a misdemeanor
Generally prosecuted in municipal or justice court (depending on jurisdiction)
May involve mandatory jail
No felony conviction if convicted of a misdemeanor DUI
Lower fines and collateral consequences
Less severe long-term impact
Aggravated DUI:
Felony
Prosecuted in Superior Court
Often involves mandatory prison exposure
Felony conviction if convicted
Greater financial, licensing, and long-term consequences
Significant impact on employment, professional licensing, firearm rights under certain circumstances, and future sentencing
Can an Aggravated DUI Be Reduced?
Sometimes. Every case is different, but depending on the evidence, the prosecution's proof, and legal issues, the defense may be able to challenge:
The legality of the traffic stop
Whether officers had reasonable suspicion or probable cause
Field sobriety testing
Breath test procedures
Blood test collection and analysis
Chain of custody
Whether the State can prove prior convictions or another aggravating circumstance
Constitutional violations
In some cases, successful legal challenges may result in reduced charges, suppression of evidence, or dismissal.
Common Defenses to Arizona DUI Charges
Potential defenses depend on the facts but may include:
Illegal Traffic Stop
Police generally must have lawful grounds to stop a vehicle.
If the stop violated the Fourth Amendment, evidence obtained afterward may be subject to suppression.
Lack of Actual Physical Control
Arizona law does not require that a vehicle be moving.
However, prosecutors must prove the defendant was driving or in actual physical control of the vehicle. Whether someone was in actual physical control is a fact-intensive question based on the totality of the circumstances.
Unreliable Field Sobriety Tests
Field sobriety tests can be affected by:
Medical conditions
Fatigue
Injuries
Uneven pavement
Weather
Age
Weight
Footwear
Anxiety
Poor performance does not necessarily mean someone was impaired by alcohol or drugs.
Problems With Breath or Blood Testing
Chemical testing can be challenged for numerous reasons, including:
Improper maintenance or calibration of equipment
Testing errors
Improper blood collection procedures
Chain of custody issues
Laboratory mistakes
Contamination
Arizona's Implied Consent Law
Arizona's implied consent law generally provides that anyone driving in Arizona is deemed to have consented to chemical testing if lawfully arrested for DUI.
Refusing a requested chemical test can result in administrative driver's license consequences through the Arizona Motor Vehicle Division, including license suspension. Refusal may also affect how the case is litigated.
However, the legal rules surrounding implied consent, search warrants, and chemical testing are complex. Whether officers lawfully obtained a sample depends on the facts and applicable law.
What Should You Do If You're Arrested for DUI?
If you are arrested:
Remain calm and respectful.
Exercise your right to remain silent.
Do not make admissions about drinking or drug use.
Do not argue with officers.
Contact an experienced Arizona DUI defense attorney as soon as possible.
Early legal representation can help preserve evidence, identify defenses, and protect your rights.
Frequently Asked Questions
Is a first DUI a felony in Arizona?
Usually no. A first DUI is generally charged as a misdemeanor unless circumstances make it an aggravated DUI under Arizona law.
What makes a DUI aggravated in Arizona?
Common reasons include driving under the influence while your license is suspended, revoked, canceled, or refused; committing a third qualifying DUI within 84 months; driving under the influence with a child under 15 in the vehicle; committing a DUI while required to have an ignition interlock device installed in a non-compliant vehicle; or committing a DUI while driving the wrong way on a highway.
Does aggravated DUI mean prison?
Many aggravated DUI convictions carry mandatory prison exposure, but the exact sentence depends on the statutory subsection, criminal history, and other factors.
Can an aggravated DUI be dismissed?
It depends on the facts. If the prosecution cannot prove every element of the offense or constitutional violations occurred, the defense may seek suppression of evidence, reduction of charges, or dismissal.
Contact an Experienced Arizona DUI Defense Attorney
A DUI conviction can have lasting consequences for your freedom, driving privileges, employment, and future. If you have been arrested for DUI, whether it is your first offense or you are facing an aggravated DUI charge, you should seek experienced legal representation as early as possible.
At Millar Law, we defend clients throughout Arizona against misdemeanor and felony DUI charges. We carefully examine every aspect of the State's case, challenge unlawful police conduct, and fight to achieve the best possible outcome for our clients.
Contact Millar Law today to schedule a confidential consultation with an experienced Arizona DUI defense attorney: (602) 900-0545.
