What is the penalty for a first DUI in Illinois?

A first DUI in Illinois is a Class A Misdemeanor with up to 364 days in jail, up to $2,500 in fines, and a minimum 1-year license revocation. Court supervision may be available for first offenders, which avoids a conviction on your record.

When does a DUI become a felony in Illinois?

A DUI becomes a felony (Aggravated DUI) in Illinois on the third offense (Class 4 Felony), fourth offense (Class 2 Felony), or any offense involving bodily injury, death, a child passenger, or driving on a revoked license.

How long is your license suspended after a DUI in Illinois?

Illinois imposes a Statutory Summary Suspension beginning 46 days after arrest: 6 months for a failed test (first offender) or 12 months for refusal (first offender). Separate court-ordered revocation runs 1 year for a first offense, 5 years for a second, and 10 years for a third.

Can I get court supervision for a DUI in Illinois?

Court supervision is available for first-time DUI offenders in Illinois. If you successfully complete supervision, the DUI does not result in a conviction on your record. However, you can only receive court supervision for DUI once in your lifetime.

What is the Statutory Summary Suspension in Illinois?

The Statutory Summary Suspension (SSS) is an automatic license suspension that begins 46 days after a DUI arrest in Illinois. First offenders face a 6-month suspension for a failed breath test or 12 months for refusing the test. Repeat offenders face 1 year (failed) or 3 years (refused).

How much does a DUI cost in Illinois?

The total cost of an Illinois DUI typically ranges from $10,000 to $25,000 or more when accounting for fines (up to $2,500), court costs, attorney fees ($2,500–$10,000), alcohol education programs, license reinstatement fees, and increased insurance premiums.

Illinois DUI Consequence Calculator — 2026 Penalties & License Impact

Know Your Exposure Before You Walk Into Court

Illinois DUI penalties range from a misdemeanor with no jail time to a Class 2 Felony with mandatory prison. Your BAC, prior record, and circumstances determine everything. This calculator maps your situation to current Illinois law.

~27,000

IL DUI arrests/year

1 in 3

result in felony charges

$10,000+

avg. total cost

Illinois DUI Law: What You Need to Know

Illinois DUI law (625 ILCS 5/11-501) prohibits operating a motor vehicle while under the influence of alcohol, drugs, or any intoxicating compound. The legal BAC limit is 0.08% for standard drivers, 0.04% for CDL holders, and 0.00% for drivers under 21.

A first-offense DUI in Illinois is a Class A Misdemeanor — but it carries serious consequences including a minimum 1-year license revocation, mandatory DUI evaluation and treatment, and a Statutory Summary Suspension that begins 46 days after arrest. First offenders may be eligible for court supervision, which avoids a conviction on your record if successfully completed.

The third DUI offense becomes an Aggravated DUI — a Class 4 Felony with 1–3 years in the Illinois Department of Corrections. A fourth offense is a Class 2 Felony with 3–7 years. DUI causing death is a non-probationable Class 2 Felony with 3–14 years per victim.

Illinois also imposes a Statutory Summary Suspension (SSS) — an administrative license suspension separate from any criminal penalties. For a first offender who fails a breath test, the SSS is 6 months. Refusal triggers a 12-month suspension. These run concurrently with any court-ordered revocation.

Aggravated DUI Triggers in Illinois

Third or subsequent DUI conviction
DUI causing bodily injury to another person
DUI causing death (reckless homicide)
DUI with a passenger under age 16
DUI in a school zone
DUI while driving a school bus
DUI on a revoked or suspended license
DUI without valid insurance