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DUI • License Suspension • Chemical Testing

Illinois DUI Defense FAQ

A DUI arrest can create two separate problems at once: the criminal case and a driver’s-license suspension process. The deadlines, test results and facts of the stop matter.

Last updated: September 17, 2026
General legal information only — not legal advice. Laws, court rules, procedures, amounts and deadlines can change and may apply differently to your facts. Do not rely on this page to calculate a deadline or decide what action to take. Contact a qualified attorney promptly to confirm current law and any deadlines that may apply. Viewing this page or contacting the firm does not by itself create an attorney-client relationship. Learn more about Attorney Wendi J. Wade.  •  Last updated September 20, 2026.

Two Tracks: Criminal Case + Driver’s License

An Illinois DUI arrest can create two separate proceedings: the criminal DUI case and the statutory-summary-suspension process affecting driving privileges. A result in one does not automatically decide the other.

What Is the Illinois DUI BAC Limit?

Illinois prohibits driving or being in actual physical control of a vehicle with an alcohol concentration of 0.08 or more. DUI can also be charged based on impairment even without a 0.08-or-higher test.

What Is a Statutory Summary Suspension?

It is an administrative driver’s-license suspension tied to a DUI arrest and chemical testing or refusal. It is separate from the criminal charge.

A statutory summary suspension can take effect on a timetable set by Illinois law after the suspension notice. The timing for the suspension and for any challenge can be important, and the applicable dates depend on the notice and current law.

What Happens if the Driver Fails Chemical Testing?

A test at or above the statutory threshold can trigger a summary suspension. For alcohol, the per-se threshold is 0.08. The suspension period depends on the driver’s statutory history.

What Happens if the Driver Refuses Testing?

Refusal can trigger a longer suspension than a failed test, and refusal evidence may be admissible in the criminal DUI case. The exact consequences depend on the driver’s history and the circumstances of the request.

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Can the Suspension Be Challenged?

Yes. Illinois provides a judicial hearing to challenge a statutory summary suspension. The available issues and timing are specific and depend on the notice, testing history and current law.

Can Police Obtain Blood After a Refusal?

Sometimes. A warrant or another lawful basis may authorize a blood draw. Illinois also has special chemical-testing provisions when an allegedly impaired driver causes death or qualifying personal injury.

What About Field Sobriety Tests?

Field sobriety exercises and chemical tests are different evidence. Their significance depends on how the officer administered, observed, documented and interpreted them.

Does a BAC of 0.16 or More Matter?

Yes. Illinois DUI law includes additional sentencing requirements when the alcohol concentration is 0.16 or more. The exact test result can therefore affect potential consequences.

Can a First DUI Receive Court Supervision?

Some defendants may be eligible for court supervision, but eligibility depends on prior DUI history and other statutory factors. Supervision is not automatic and is not available in every case.

What Evidence Does a DUI Attorney Review?

The defense may review the reason for the stop, officer observations, body-camera or squad video, field sobriety testing, breath or blood procedures, laboratory evidence, warrants, warnings, statements and statutory-summary-suspension paperwork.

The legal significance of those facts depends on the actual record—not simply the BAC number.

What Issues Commonly Need Attention After a DUI Arrest?

  • The tickets, suspension notice and testing paperwork.
  • The dates shown on the suspension notice and court documents.
  • Current driving privileges and any license restrictions.
  • Information about the stop, testing, video and possible witnesses.
  • Statements, social-media activity or communications that may become evidence.
  • The separate criminal-case and driver’s-license consequences.

Illinois DUI Defense in Belvidere and Northern Illinois

The Law Offices of Wendi J. Wade offers free DUI consultations and represents clients facing Illinois DUI and related traffic matters from its Belvidere office.

Read the full guide: What Happens After a First DUI Arrest in Illinois? →

For broader criminal-process questions, see Illinois Criminal Defense FAQ.

Illinois legal references:
625 ILCS 5/11-501 — Driving Under the Influence
625 ILCS 5/11-501.1 — Statutory Summary Suspension / Implied Consent
625 ILCS 5/11-501.2 — Chemical Tests
Illinois Secretary of State — Statutory Summary Suspension

Quick Answers

Illinois DUI Questions

General information about DUI charges, chemical testing and driver’s-license consequences.

What is the legal BAC limit for DUI in Illinois?

Illinois prohibits driving or being in actual physical control of a vehicle with an alcohol concentration of 0.08 or more. A person can also be charged with DUI based on impairment even when a chemical test is below 0.08.

Is a first DUI a criminal case?

Yes. DUI is a criminal offense. The classification and possible penalties depend on the facts, prior history, injuries, passengers, license status and other statutory factors.

When does the statutory summary suspension begin?

A statutory summary suspension can take effect on a timetable set by Illinois law after the suspension notice. The timing for the suspension and for any challenge can be important, and the applicable dates depend on the notice and current law.

What happens if a driver fails chemical testing?

A test at or above the applicable statutory threshold can trigger a statutory summary suspension. For alcohol, the per-se threshold is 0.08. The suspension period depends on the driver's statutory history.

What happens if a driver refuses chemical testing?

Refusal can trigger a longer statutory summary suspension than a failed test. The exact period depends on the driver's statutory history, and refusal evidence may also be admissible in the DUI case.

Can the driver challenge the statutory summary suspension?

Yes. Illinois law allows a judicial hearing to challenge the statutory summary suspension. The issues and deadlines are specific and depend on the notice, testing history and current law.

Can police obtain blood after a refusal?

In some circumstances. Illinois law permits chemical testing under specified conditions, and a warrant or other lawful authority may support a blood draw. Cases involving death or qualifying personal injury have additional statutory provisions.

Are field sobriety tests the same as chemical tests?

No. Field sobriety exercises and chemical tests are different forms of evidence. The significance of either depends on how the test was requested, performed, documented and used in the case.

Can a first-time DUI result in court supervision?

Illinois law can permit court supervision for some DUI defendants, but eligibility depends on the person's record and the facts of the case. Supervision is not available in every DUI.

Does a BAC of 0.16 or more matter?

Yes. Illinois DUI law includes additional sentencing requirements when the alcohol concentration is 0.16 or more, so the exact test result can affect potential consequences.

What issues commonly need attention after a DUI arrest?

Common issues include the tickets and suspension paperwork, the date shown on the suspension notice, current driving privileges, information about the stop and testing, and the separate criminal-case and driver’s-license consequences.

The exact consequences depend on the charge, test result, driving history, injuries, passengers, license status and other facts.

These longer guides provide additional general information. They are educational only, not individualized legal advice.

Browse all Legal Resources →

Official Resources for Further Reading

Primary-source links can be useful when checking current statutes, court information, and agency guidance. Laws and procedures can change, and these resources do not replace legal advice about a specific matter.

Arrested for DUI in Illinois?

Attorney Wendi J. Wade can review the stop, testing, license paperwork and criminal charge and explain the issues that matter in your case.

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