While most DUI cases are misdemeanors in Illinois, aggravated DUI are considered a felony offense. The offenses which result in a felony charge range from Class 4 to Class 2 felonies. Class 4 felony is punishable by a prison sentence between one and three years, along with a fine of up to $25,000. A Class 3 felony is punishable by a prison sentence between two to five years and a fine of up to $25,000. A Class 2 felony is punishable by a three and seven-year prison sentence and a fine of up to $25,000. Any mandatory prison term or community service is not subject to suspension or reduction.
