Arizona DUI laws set the standard BAC limit at 0.08% for drivers over 21. Commercial drivers face a 0.04% limit, and drivers under 21 face a zero tolerance rule. A first offense standard DUI brings a mandatory 10 day jail minimum, with up to 9 days suspended, plus fines often exceeding $1,250. This guide covers penalty tiers and license rules, citing Section 28-1381 and the Arizona Department of Transportation.
Key Terms Defined
Arizona DUI law uses terms that confuse many readers. Actual physical control means a person can face charges without the vehicle moving, as long as they could operate it, such as sitting in the driver’s seat with keys within reach. Implied consent means holding a license already includes agreement to chemical testing if lawfully arrested. An admin per se suspension is the automatic MVD action, separate from any criminal case.
An ignition interlock device, often called an IID, is a breath testing unit installed in a vehicle that prevents the engine from starting if it detects alcohol. Arizona law also uses charge classifications such as Class 1 misdemeanor, which applies to standard, extreme, and super extreme DUI, and Class 4 felony, which applies to most aggravated DUI. A lookback period is the 84 month window used for prior convictions.
What the Law Says
Arizona Revised Statutes Section 28-1381 makes it unlawful to drive or be in actual physical control of a vehicle while impaired to the slightest degree by alcohol, drugs, or a combination. This standard reaches beyond a simple numeric BAC test. A driver can face charges even with a BAC below 0.08% if an officer and later a court determine that alcohol or drugs affected the driver’s ability to operate safely.
The standard BAC threshold for drivers 21 and older is 0.08%. Commercial vehicle drivers face a lower threshold of 0.04%, reflecting the added responsibility of operating large vehicles. Drivers under 21 face a zero tolerance rule, meaning any detectable alcohol while driving can result in criminal charges regardless of impairment level. Arizona’s implied consent statute requires drivers to submit to chemical testing when lawfully arrested on suspicion of DUI.
Who It Applies To
Arizona DUI law applies broadly to anyone driving or in actual physical control of a vehicle in the state, whether the driver holds an Arizona license or an out of state license. Standard passenger vehicle drivers face the 0.08% threshold described above. Commercial driver license holders face a stricter 0.04% threshold, since a DUI conviction can trigger a separate federal disqualification period stacked on top of standard state penalties.
Drivers under the age of 21 are treated differently under Arizona’s zero tolerance approach. Because these drivers are not legally permitted to consume alcohol at all, any measurable amount in their system while driving can support a charge, even far below the 0.08% threshold that applies to adult drivers. This creates a meaningfully lower enforcement bar for underage drivers compared with drivers over 21.
Standard DUI Penalties
A standard DUI charge under Arizona Revised Statutes Section 28-1381 generally applies when a BAC measures at or above 0.08% but below 0.15%, or impairment is shown through other evidence. This is a Class 1 misdemeanor, the most serious misdemeanor category in Arizona. A first offense conviction generally carries a mandatory minimum of 10 days in jail, though courts may suspend up to 9 days after screening is completed.
Fines and court assessments for a first standard DUI typically total more than $1,250 once base fines and mandatory surcharges combine, and total cost including fees can run substantially higher. A first conviction generally triggers a 90 day license suspension and a 12 month ignition interlock requirement. Penalties increase for a second standard DUI within the 84 month lookback period, including longer mandatory jail time and higher fines overall.
Extreme and Super Extreme DUI
Extreme DUI applies under Arizona Revised Statutes Section 28-1382 when a BAC measures 0.15% or higher but below 0.20% within two hours of driving or actual physical control. This remains a Class 1 misdemeanor, but the mandatory minimum jail term for a first offense is longer than standard DUI, generally starting at 30 consecutive days, with only a portion eligible for suspension after screening and treatment requirements are met.
Super Extreme DUI applies at a BAC of 0.20% or higher and carries the harshest misdemeanor penalties in Arizona. A first offense generally requires a longer mandatory jail term than extreme DUI, along with higher fines and a longer ignition interlock requirement, generally 18 months. Both extreme and super extreme DUI require a 90 day license suspension and mandatory screening before reinstatement eligibility begins for the convicted driver.
Aggravated DUI as a Felony
Aggravated DUI under Arizona Revised Statutes Section 28-1383 elevates a DUI charge from a misdemeanor to a felony when specific circumstances exist. These generally include driving while the license is suspended, canceled, revoked, or restricted, a third or subsequent DUI within the 84 month lookback period, driving with a person under 15 years of age in the vehicle, and driving while required to have an ignition interlock installed.
Most aggravated DUI circumstances are a Class 4 felony, but the circumstance involving a passenger under 15 years of age is classified differently as a Class 6 felony under Arizona law. A conviction generally carries a mandatory minimum prison term, license revocation of at least 3 years, and an extended ignition interlock requirement upon reinstatement. Because these consequences involve prison rather than jail, consulting a licensed attorney matters greatly here.
License Suspension: Administrative Track
Arizona runs two separate license consequence processes after a DUI arrest, and the difference matters because they follow different timelines. The administrative track is handled entirely by the Arizona Department of Transportation Motor Vehicle Division and begins independently of any court outcome. If a driver takes a chemical test and the result meets or exceeds the legal threshold, MVD generally imposes a 90 day suspension under its own authority.
According to the Arizona driving under the influence penalties and license suspension guide from the Arizona Department of Transportation, a driver generally has 30 days from the date on the suspension notice to request a hearing challenging that action. Some other sources describe a 15 day window, so drivers should rely on their official notice and confirm the applicable deadline directly with MVD given the stakes involved.
License Suspension: Criminal Track
The criminal track runs separately through the court system and depends on the outcome of the DUI charge itself. If a driver is convicted, the court can impose its own license suspension or revocation as part of sentencing, on top of whatever action MVD already took administratively. A single DUI arrest can therefore lead to two distinct suspension periods running through two different government processes at once.
The legal basis for the administrative process appears in the Arizona Revised Statutes Section 28-1385 administrative suspension statute, which outlines how MVD issues suspension notices and what hearing rights a driver holds. A driver who refuses chemical testing faces a separate consequence under Arizona’s implied consent framework, generally resulting in a 12 month suspension for a first refusal and a longer suspension for a second refusal.
Ignition Interlock Requirements
Arizona law requires a certified ignition interlock device for nearly every DUI conviction, including first time standard DUI offenses. The requirement generally runs 12 months for standard or extreme DUI, though some standard DUI cases may qualify for a reduced period. Super extreme DUI generally carries an 18 month requirement for a first offense, and aggravated DUI convictions generally carry a longer requirement extending to 24 months in some cases.
The ADOT ignition interlock device FAQ explains that a person generally has 30 days from a conviction date to install the device and have installation electronically verified with MVD. Failing to meet this deadline can result in an immediate suspension of driving privileges and may extend the original interlock requirement, so timely installation matters as much as the case outcome itself.
Exceptions and Limitations
Not every DUI stop results in identical consequences, and Arizona law includes narrower distinctions worth understanding. A driver whose BAC measures at or below 0.05% generally benefits from a presumption that they were not under the influence, though this presumption can be outweighed by other evidence of impairment such as erratic driving or field sobriety indicators. This presumption does not apply to drivers under 21 subject to zero tolerance.
Drug related DUI charges can apply even when the substance involved is a legally prescribed medication, if that medication impairs a driver’s ability to operate a vehicle safely. Arizona courts generally do not require proof that a driver knowingly broke the law for many DUI elements, meaning charges can apply even when impairment was unintentional. These distinctions show why BAC numbers alone do not capture the full scope of enforcement.
Recent Law Updates
Arizona’s DUI sentencing framework has continued to evolve. A sentencing guideline update effective September 26, 2025 expanded the pathways available for reinstating driving privileges under Arizona Revised Statutes Section 28-1381 subsection I paragraph 6, allowing evidence based psychotherapy to count as an approved pathway alongside the screening, education, and treatment programs that previously qualified on their own under that provision before the update took effect.
Arizona courts have also clarified certain aggravated DUI provisions through recent appellate decisions. One ruling addressed how the wrong way driving aggravator under Arizona Revised Statutes Section 28-1383 subsection A paragraph 5 applies, treating that circumstance as one the state does not need to prove the driver knowingly committed. Laws and enforcement may change, so readers should check official state sources for the latest rules before relying on figures here.
Common Misconceptions
Many drivers assume DUI charges only apply while a vehicle is actively moving, but Arizona’s actual physical control standard means a parked driver with keys accessible can still face charges. Another common misconception is that a single license suspension covers the entire process, when the administrative MVD suspension and any criminal court suspension operate separately and can overlap or extend beyond each other depending on the specific case and conviction.
Some drivers also believe that refusing a chemical test avoids DUI consequences entirely. In Arizona, refusal instead triggers its own independent suspension under the implied consent law, generally lasting 12 months for a first refusal, and prosecutors may still pursue DUI charges using other available evidence. Readers can review the Disclaimer page for more on how Lawwalls handles informational legal content and its limits.
Disclaimer
This article is for general informational purposes only. It is not legal advice. Lawwalls publishes informational content only and does not provide legal services or legal advice.
For legal advice about your specific situation contact a licensed attorney in your state. Laws change and vary by jurisdiction. Verify current rules with official government sources or a qualified lawyer.