What qualifications do I need to become a licensed private investigator in Illinois?

You need to be at least 21 years old and have three years of qualifying investigative experience within the last five years, or less if you have a related degree.

How do I prove my investigative experience?

Document your experience through work records, references, or affidavits that outline your roles and responsibilities in previous investigative positions.

Is there an examination required for licensing?

Yes, you must pass the Illinois private detective examination, which assesses your knowledge and skills relevant to the profession.

Do I need insurance to operate as a private investigator in Illinois?

Yes, you need to obtain a general liability insurance policy with a minimum coverage of $1,000,000 if you are operating an agency.

Can I operate my private investigator business as soon as I submit my application?

No, you must wait until you receive your Illinois Private Detective License from the IDFPR to legally operate your business.

Private Investigator License Requirements in Illinois (2026 Guide)

Licensing Requirements

Private Investigator License Requirements in Illinois — Full checklist of Illinois requirements, fees, and steps.
Private Investigator License in Indiana
Private Investigator License in Iowa
Private Investigator License in Kansas
Private Investigator Licensing — All States — State-by-state private investigator licensing overview.

Related Licensing Guides

Private Investigator License Requirements in Tennessee (2026 Guide) — A complete guide to private investigator licensing in Tennessee: the Tennessee Private Investigator License, Tennessee Department of Commerc
Private Investigator License Requirements in Delaware (2026 Guide) — A complete guide to private investigator licensing in Delaware: the Delaware Private Investigative Agency License, Delaware State Police - P
Private Investigator License Requirements in Washington (2026 Guide) — A complete guide to private investigator licensing in Washington: the Washington Private Investigator License (Individual / Agency), Washing
Private Investigator License Requirements in Virginia (2026 Guide) — A complete guide to private investigator licensing in Virginia: the Virginia Private Investigator Registration (DCJS 04), Virginia Departmen