What Makes a DUI a Felony in Arizona?

Standard DUI vs. Aggravated DUI in Arizona

Arizona distinguishes between misdemeanor and felony DUI charges based on the circumstances surrounding the arrest. A standard DUI — driving with a blood alcohol concentration of 0.08% or higher — is typically charged as a misdemeanor. However, when aggravating factors are present, the charge escalates to aggravated DUI under A.R.S. 28-1383, a Class 4 felony. The difference between a misdemeanor and felony DUI is not merely academic — it determines whether you face county jail or state prison.

Circumstances That Trigger Felony DUI

Arizona law specifies four primary circumstances that elevate a DUI to felony status. First, driving under the influence while your license is suspended, revoked, or canceled. Second, committing a third DUI offense within a seven-year lookback period. Third, operating a vehicle under the influence with a passenger under 15 years of age. Fourth, refusing to submit to a blood or breath test while an ignition interlock device is required on your vehicle. Any one of these circumstances alone is sufficient to trigger aggravated DUI charges.

Penalties for Felony DUI in Arizona

An aggravated DUI conviction carries mandatory prison time in the Arizona Department of Corrections — not county jail. For a first aggravated DUI offense, the minimum sentence is 4 months in prison, with a presumptive term of 2.5 years and a maximum of 3.75 years. Second aggravated DUI offenses carry harsher penalties, and the court has limited discretion to deviate from mandatory minimums. Additional consequences include felony record, extended license revocation, substantial fines, mandatory alcohol treatment, and ignition interlock device installation upon license reinstatement.

Defenses Against Felony DUI Charges

Despite the severity of aggravated DUI charges, defenses exist. An attorney may challenge whether the initial traffic stop was lawful, whether field sobriety tests were administered correctly, whether chemical testing equipment was properly calibrated and maintained, or whether your prior convictions actually fall within the seven-year lookback window. Procedural errors by law enforcement can result in evidence suppression or charge reduction. Given the mandatory prison time at stake, aggressive defense representation is not optional — it is essential.