--- title: "Aggravated DUI Felony Class Structure in Illinois" description: "Every aggravated DUI in Illinois is a felony. The question is which one. Class 4. Class 2. Class 1. Class X. The letter attached to the charge is the difference between probation eligibility and..." url: https://chicagoduilawyer.net/aggravated-dui-penalties-illinois-classes/ date: 2026-07-02 modified: 2026-07-02 author: "Chicago DUI Lawyer" image: https://chicagoduilawyer.net/wp-content/uploads/2026/06/featured-288476-1.jpg categories: ["Uncategorized"] type: post lang: en --- # Aggravated DUI Felony Class Structure in Illinois Every aggravated DUI in Illinois is a felony. The question is which one. Class 4. Class 2. Class 1. Class X. The letter attached to the charge is the difference between probation eligibility and mandatory time in the Illinois Department of Corrections. Between a $25,000 fine ceiling and a $250,000 fine ceiling. Between the possibility of returning to work in ninety days and the certainty of losing a career. **Aggravated DUI penalties Illinois classes** are codified inside 625 ILCS 5/11-501(d)(2). Chicago DUI Lawyer starts every aggravated DUI intake by pinning the class first, then working backward to which aggravating factor in 11-501(d)(1) actually pushed the case into that grade. Understanding the class ceiling controls every downstream decision. ## The Four Felony Grades Under 625 ILCS 5/11-501(d)(2) Section 11-501(d)(2) assigns a felony class to each aggravator listed in 11-501(d)(1). The grades in ascending severity: - **Class 4 felony**, 1 to 3 years in the Illinois Department of Corrections, probation possible, up to $25,000 fine - **Class 2 felony**, 3 to 7 years IDOC, probation possible in some subsections, up to $25,000 fine - **Class 1 felony**, 4 to 15 years IDOC, probation restricted, up to $25,000 fine - **Class X felony**, 6 to 30 years IDOC, no probation, no supervision, up to $25,000 fine, day-for-day credit limited Every one of those ranges assumes a standard-range sentence with no extended-term enhancement. Prior Class 2 or greater convictions inside ten years, hate crime findings, or other statutory enhancers can push each range higher. ## Class 4 Aggravated DUI: The Entry Point Class 4 is the entry felony grade for aggravated DUI. It attaches when the base 11-501 offense is combined with an aggravator that carries no bodily harm, no death, and no third-or-subsequent count. The most common Class 4 pathways under 11-501(d)(2)(A): - DUI while driving without a valid license or permit - DUI while driving without vehicle liability insurance - DUI when a prior reckless homicide DUI conviction exists on the record - Second DUI committed while transporting a passenger under sixteen (the child aggravator at second offense elevates from misdemeanor to Class 4) Class 4 exposure means IDOC is technically on the table but probation is available in most cases. Sentencing negotiations move around treatment placement, community service hours, and the client's fitness for a probation-heavy resolution. ## Class 2 Aggravated DUI: The Middle Tier Class 2 is where the majority of contested Chicago aggravated DUI cases live. Under 11-501(d)(2)(B) through (d)(2)(F), Class 2 attaches to: - A **third or subsequent DUI**, automatic aggravated DUI regardless of any other factor - DUI committed while the driver's license was suspended or revoked for a prior DUI, reckless homicide, or leaving the scene - DUI in a **school zone** during restricted hours involving an accident with bodily harm - DUI proximately causing **great bodily harm, permanent disability, or disfigurement** to another person - DUI while operating a **school bus** transporting one or more minors Class 2 probation is available in most of these subsections, but not all. The great bodily harm subsection under (d)(2)(F) carries a mandatory minimum sentence of probation with 480 hours community service or 10 days imprisonment, and can be pushed to IDOC when the state builds a strong sentencing record. ## Class 1 Aggravated DUI: The Fatality Range Class 1 grade is where the state treats the case as a serious felony from the first appearance. Under 11-501(d)(2)(G): - A DUI proximately causing the **death of another person**, one victim, is a Class 1 felony - Sentence range 3 to 14 years IDOC, extendable to 25 years where aggravating factors are proved - Probation available *only* upon a specific finding by the court that extraordinary circumstances exist and that probation would not deprecate the seriousness of the offense - The **fifth DUI conviction** is codified as Class 1 aggravated DUI, no probation available at that grade Class 1 fatality DUI files carry a felony murder framing in the prosecutor's charging memo even when the actual charge is aggravated DUI. Sentencing exposure grows quickly when the victim's family is involved and a victim impact statement is offered. ## Class X Aggravated DUI: The Ceiling Class X is the highest classification available under 11-501(d)(2). It applies in a narrow set of the most serious aggravated DUI files: - DUI proximately causing **death of two or more persons** under 11-501(d)(2)(H) - Certain sixth or subsequent DUI convictions under the enhanced repeat-offender provisions Class X exposure is 6 to 30 years IDOC. No probation. No supervision. Truth-in-sentencing rules govern the actual time served, and depending on the victim count, the range can be extended further. Class X aggravated DUI cases are prosecuted by senior felony trial units in Cook County and rarely resolve through standard plea negotiation. ## Reading the Class off the Charging Instrument The complaint or indictment names the subsection of 11-501(d)(1) charged. That subsection maps directly to a class under 11-501(d)(2). The first job of defense counsel is to confirm the class before analyzing anything else about the file, because the class controls: - Whether pretrial detention is on the table under the Pretrial Fairness Act - Whether probation is statutorily available - Whether court supervision is even a theoretical outcome (it is not, on any aggravated DUI) - Which sentencing statute governs (extended term, truth-in-sentencing, MSR term) - Whether the case is triable in a suburban courthouse or lifted into a downtown felony trial call ## Working Backward: Which Factors Produce Which Class Once the class is fixed, the aggravator is next. Chicago DUI Lawyer maps the class-to-factor pathway on every aggravated DUI intake. Sample mapping: - Class 4 usually means license or insurance defect at time of stop, no injury - Class 2 usually means third-or-subsequent DUI history, or great bodily harm - Class 1 usually means single-fatality DUI or a fifth conviction - Class X usually means multi-fatality DUI Knowing which factor the state must prove to hold the class shows where the defense pressure points are. Beat the aggravating factor and the class collapses. A Class 2 great-bodily-harm charge that loses the causation element on the harm falls back to a misdemeanor DUI. A Class 4 no-insurance case where the defense produces a valid SR-22 issued the week of the arrest collapses the aggravator entirely. ## Sentence Ranges Beyond the Base Numbers The statutory ranges are only part of the picture. Extended-term sentencing under 730 ILCS 5/5-8-2 can double the maximum where the record shows a prior Class 2 or greater felony inside ten years. Consecutive sentencing under 730 ILCS 5/5-8-4 attaches automatically to certain great-bodily-harm and fatality convictions. Truth-in-sentencing rules under 730 ILCS 5/3-6-3 restrict good-conduct credit on the most serious aggravated DUI counts. Mandatory Supervised Release (MSR) terms follow every IDOC sentence and run one to three years depending on class. Class X convictions in particular carry an MSR term of three years and truth-in-sentencing service of at least 85 percent where the underlying fatality resulted in the death of two or more persons. ## Fines, Assessments, and Collateral Financial Exposure The $25,000 statutory fine ceiling applies across most aggravated DUI classes, but the actual out-of-pocket exposure exceeds the ceiling once statutory assessments, DUI-specific fees, court costs, ignition interlock program fees, alcohol evaluation costs, and the collateral cost of license reinstatement are added. A Class 2 aggravated DUI resolution that avoids IDOC still routinely produces total financial exposure north of $15,000 before defense fees. ## License Revocation Follows the Class Aggravated DUI convictions trigger revocation of driving privileges through the Illinois Secretary of State, not the court. Class 4 aggravated DUI revocation runs a minimum of one year with extension based on prior record. Class 2 and Class 1 revocations extend to five, ten, or lifetime revocation depending on subsection. A fifth DUI conviction, which is Class 1 aggravated, produces lifetime revocation with no reinstatement pathway. ## Free Consultation on Your Aggravated DUI Class The felony class attached to the charge determines every strategic option in the case. Chicago DUI Lawyer reads the class off the charging instrument on the first call and works backward from there. ## Related Pages - (https://chicagoduilawyer.net/chicago-aggravated-dui-lawyer/) - (https://chicagoduilawyer.net/multiple-dui-charges/) - (https://chicagoduilawyer.net/dui-with-injury/) - (https://chicagoduilawyer.net/dui-accidents/) - (https://chicagoduilawyer.net/illinois-dui-license-suspension/) - (https://chicagoduilawyer.net/dui-penalties/)