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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.

DUI attorneys available now in Illinois
0.08%
BAC Limit
DUI
Term Used
Lifetime
Lookback
Yes
Implied Consent
No
Expungement

Illinois DUI Penalties

1st Offense

ClassificationMisdemeanor
Jail TimeUp to 1 year
FinesUp to $2,500
License6-month suspension (1 year if test refused)
Mandatory JailNo

2nd Offense

ClassificationMisdemeanor
Jail TimeUp to 1 year (5 days mandatory or 240 hours community service)
FinesUp to $2,500
License1-year suspension (3 years if refused)
Felony Threshold3rd offense (aggravated DUI)

BAC Limits in Illinois

0.08%
Standard Driver
0.04%
Commercial Driver
0.00%
Under 21

🔧 Ignition Interlock

Required for MDDP (driving permit during suspension)

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🛡️ Insurance Requirements

SR-22 required for 3 years

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📜 Expungement

Illinois does not allow DUI expungement.

Expungement Guide →

💰 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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DUI Lawyers by City in Illinois

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Connect with experienced DUI lawyers in Chicago, Aurora, Naperville, and across Illinois.

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Official Sources & References

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.

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