Illinois DUI Laws & Penalties (2026)
Illinois uses a lifetime lookback period. DUI cannot be expunged or sealed. The state offers MDDP (Monitoring Device Driving Permit) with IID during suspension.
Illinois DUI Penalties
1st Offense
2nd Offense
BAC Limits in Illinois
💰 Estimated Total Cost
A first DUI in Illinois typically costs $10,000-$25,000+ including fines, attorney, classes, IID, and insurance increases.
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Illinois DUI Deep Dives
🚨 First Offense Penalties
Complete guide to what happens on your first DUI in Illinois.
🍺 BAC Limit
Legal BAC limits for standard, commercial, and under-21 drivers.
💰 DUI Cost
Full cost breakdown: fines, attorney, classes, insurance, and more.
🔧 Ignition Interlock Cost
IID installation, monthly fees, and provider comparison.
🚫 License Suspension
Suspension length, restricted license options, and reinstatement steps.
🧮 Cost Calculator
Estimate your total DUI cost with our interactive tool.
Official Sources & References
- 📋 625 ILCS 5/11-501 — Illinois DUI statute
- 🚗 Illinois DMV — License suspension, reinstatement, IID requirements
- 📊 NHTSA Impaired Driving Data
- 🛡️ MADD — Mothers Against Drunk Driving
DUIFinders.com is not a law firm and does not provide legal advice. Information is for general purposes only. Consult a licensed attorney in Illinois for advice specific to your situation.
Illinois DUI FAQ
What is the BAC limit in Illinois?
The legal BAC limit in Illinois is 0.08% for regular drivers, 0.04% for commercial drivers, and 0.00% for drivers under 21.
What are the penalties for a first DUI in Illinois?
A first DUI in Illinois is a Misdemeanor. Penalties include Up to 1 year jail, Up to $2,500 in fines, and 6-month suspension (1 year if test refused) license suspension.
Is an ignition interlock device required in Illinois?
Required for MDDP (driving permit during suspension)
Can a DUI be expunged in Illinois?
No, Illinois does not allow DUI expungement.
What is the lookback period for DUI in Illinois?
Illinois uses a Lifetime lookback period to determine if an offense counts as a repeat offense.