A first DUI in Illinois is generally classified as a Class A misdemeanor.
Jail: none – 1 year; mandatory min none (0.16+: 100 hrs community service; child <16 in car: 6 months)
Fine: $0–$2,500 (plus substantial court costs/assessments; $500 minimum if 0.16+)
License suspension: statutory summary suspension: 6 months (test failure) BEFORE conviction; conviction: minimum 1-year revocation – 1 year revocation; hardship: MDDP (Monitoring Device Driving Permit) with BAIID allows driving during the summary suspension for first offenders
Ignition interlock: Not required at this level — BAIID required for the MDDP permit during summary suspension.
Alternative disposition: Court supervision (once per lifetime for DUI): no conviction entered, no revocation — the most important IL first-offense fact. Typically unavailable at 0.16+ or with a minor in the vehicle; still counts as a prior forever.
Two separate license tracks: automatic statutory summary suspension (civil, starts day 46 after notice) AND post-conviction revocation.
Lookback period: lifetime. NO washout period — a 20-year-old prior counts for enhancement, and completed COURT SUPERVISION counts as a prior for felony enhancement (People v. Sheehan). Third violation ever = aggravated DUI felony.
Some links on this site are paid advertising and we may be compensated when you use them. Advertising never affects which statutes or penalties we report — how this site makes money.