A first-offense Illinois DUI is a Class A misdemeanor under 625 ILCS 5/11-501(c)(1), carrying a maximum fine of $2,500. Typical fines imposed in Cook County range from $500 to $1,500 depending on BAC, driving record, and whether the case resolves as court supervision or conviction. Court costs and mandatory assessments add several hundred more, including the DUI Equipment Fund, the Trauma Fund, and the Roadside Memorial Fund. The high-BAC enhancement at 0.16 or above adds a mandatory minimum $500 fine on top of any base fine. Child-passenger DUI adds a mandatory $1,000 fine. Total out-of-pocket cost for a first offense including fines and court costs typically lands between $1,500 and $3,000.
