How To Become a Licensed Private Investigator in Illinois

Private Investigator License
Download and complete the necessary forms from the state licensing website.

Illinois Licensing Requirements

Licensing Authority

Private investigator licensing in the state of Illinois is handled by the Illinois Department of Financial and Professional Regulation, Division of Professional Regulation. The department issues licenses for private detective professions:

  • Licensed Private Detective
  • Licensed Private Detective Agency
  • Licensed Private Detective Agency Branch Office
  • Approved Training Course School
  • Firearm Control Card (FCC)
  • Permanent Employee Registration Card (PERC)
  • Firearm Instructor
  • Approved 20-Hour Basic Training Program
  • Approved Basic 40-Hour Firearm Training Course

Contact Information

100 West Randolph, 9th Floor | Chicago, IL 60601
320 West Washington, 3rd Floor | Springfield, IL 62786
Phone: 1 (888) 473-4858


General Requirements

The following is general licensing information. Please visit the website listed above for specific licensing information, application forms, insurance requirements, fees and any special licensing requirements.

You must also be able to meet the following minimum requirements to be eligible for private investigator jobs in Illinois:

  • Be at least 21 years old
  • Have either no felony convictions or at least 10 years has passed since your sentence was completed
  • May not be a registered sex offender
  • Must be of good moral character
  • Must be psychologically and physically fit for the duties of a private detective
  • Must Have no narcotic or alcohol addictions

Please visit the website listed above for a complete list of requirements and to learn the steps involved in the application process. Via the website, you can find out how to get licensed, lookup an existing licensee, and learn about the laws and rules that govern private eyes in the state of Illinois.

Special Requirements

Other special licensing requirements such as education requirements, experience requirements, examinations, and insurance may be required. Please check the state licensing website for more information.

If you need more help, Buy the P.I. Licensing eBook at Amazon today for just $2.99.

Private Investigator Associations

Associated Detectives & Security Agencies of Illinois – The ADSAI, formerly known as ADI is a state chartered, not for profit organization founded in 1933, incorporated in 1937 and organized for the betterment of the Detective and Security Professions.

Hire a Private Detective

Hire a Private Investigator Agency in Illinois – To hire a private eye, please visit our worldwide directory of investigation agencies. Our directory may also help you find an agency to sponsor your training and certification efforts, and help you comply with state licensing requirements.

Additional Information

Training Resources – Improve your chances of getting licensed by completing a professional degree program, training course, or home study course. Learn what options are available to get the investigative knowledge necessary to get licensed and begin your career.


  1. Like to know what I need to do to get a P/I licenses in State of Illinois. I’m a retired Army Veteran looking to do some free lance work.


Please enter your comment!
Please enter your name here