- The exam is 75 questions in 90 minutes; you need a scaled score of 70+, not 70 raw correct answers.
- Detective Practices is 40 of 75 questions - nearly the entire exam pivots on this domain.
- Exam fee is $298; the separate license application fee is $500, plus $1 million liability insurance before issuance.
- Apply through IDFPR CORE first, then register with Continental Testing Services using your approval ID.
Exam Snapshot: Format, Timing, Sections
The Illinois Private Detective License Exam (IL-PD) is the standalone Private Detective examination administered by Continental Testing Services (CTS) on behalf of the Illinois Department of Financial and Professional Regulation, Division of Professional Regulation, under profession code 115. Candidates who intend to hold both a detective license and a security-contractor license sit a different, combined 115-question, 120-minute exam with its own separate application and fee - that is not the exam this cheat sheet covers.
For the standalone Private Detective exam, memorize these numbers cold:
- 75 questions, single-best-answer multiple choice
- 90-minute time limit
- Passing score: 70 or higher on the published scale (not 70 raw correct answers)
- Three official top-level sections: Federal & State Law, Licensing & Practice Requirements, Detective Practices
If any of this feels unfamiliar, back up and read the full IL-PD Study Guide 2026: How to Pass on Your First Attempt before diving into this quick-reference sheet - the cheat sheet works best as a final review, not a first introduction.
The Three Content Domains
Every question on the IL-PD exam is drawn from one of three official domains, and the point allocation is published rather than estimated - so practice tests should mirror it exactly.
Domain 1: Federal & State Law - 23 questions
Statutory and regulatory knowledge governing how licensed detectives may lawfully operate in Illinois, including limits on authority, privacy, and evidence handling.
- Nearly one-third of the exam; under-preparing here is a common cause of a near-miss score
Domain 2: Licensing & Practice Requirements - 12 questions
The administrative rules that govern who can hold a license, how it's maintained, and what practice standards apply to licensees and agencies.
- Smallest domain by question count, but still worth focused review passes since it's concentrated and memorizable
Domain 3: Detective Practices - 40 questions
The largest domain by far, covering the actual conduct of investigative work. It breaks into three subareas that are not separate top-level sections but still deserve individual study blocks:
- Gathering Information - 16 questions
- Case Management - 12 questions
- Analysis, Reporting & Presentation - 12 questions
Because Detective Practices alone accounts for more than half the exam, most of your review hours belong there. For a deeper breakdown of what each subarea actually tests, see IL-PD Exam Domains 2026: Complete Guide to All 3 Content Areas.
Key Takeaway
Build practice tests using the real allocation - 23/12/40 across the three sections, with the 40-question domain split 16/12/12 internally. A generic 33/33/33 practice set will misrepresent the real exam.
Registration & Fees Cheat Sheet
Registration is a two-step process, and skipping the order causes delays: apply through IDFPR CORE first, get Department approval, and only then register with CTS using your authority-to-sit/examination approval ID.
| Item | Amount / Detail |
|---|---|
| Exam fee (CTS) | $298 |
| Individual license application fee | $500 (separate from exam fee) |
| Liability insurance requirement | $1 million general liability, in applicant's name, required before license issuance |
| Additional costs not included above | Fingerprinting, exam prep, any agency licensing fees |
| License renewal cycle | Every three years, due May 31 |
| Renewal fee calculation | $150 per year of the renewal cycle |
For a complete line-item walkthrough of every fee and how they stack together across the application and renewal lifecycle, read IL-PD Certification Cost 2026: Complete Pricing Breakdown.
Eligibility Snapshot
Before you can register for the exam, IDFPR needs to approve your qualifications. The core requirements:
- Minimum age 21
- Three of the preceding five years of qualifying full-time investigative employment, ordinarily documented
- Approved bachelor's degree can credit two years of the experience requirement
- An appropriate associate degree can credit one year
- Qualifying military law-enforcement training may support a separate credit route
- Submission of the applicable experience-verification forms and background documentation
Education credit doesn't replace documentation - you still submit verification forms and background paperwork alongside any degree or military-training credit claim. The qualifications packet was revised February 2026, so cross-check your forms against that current version rather than an older download. For the full eligibility walkthrough, including how the three credit routes interact, see IL-PD Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Passing Score Math
One of the most misunderstood facts about this exam: the published passing score of 70 is a scaled score, not a raw count of correct answers out of 75. Candidates sometimes assume they need 70 out of 75 correct (roughly 93%), which is a much higher bar than what's actually required. Don't build your study plan around that misreading.
Because the exam uses single-best-answer multiple choice throughout, elimination strategy matters as much as raw recall - especially on Federal & State Law questions where two answer choices are often both technically true but only one is the "best" answer under the specific statute being tested. A full explanation of how the scaled score works and what margin you should study for is in IL-PD Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Treat the passing score as a scaled 70, not a percentage of 75 raw correct answers - studying for 93% accuracy when you don't need to wastes preparation time better spent on Detective Practices depth.
Key Dates for the 2026 Cycle
Illinois exam scheduling runs on a published CTS calendar rather than continuous testing, so deadlines matter more than they would for on-demand exams.
- October 28, 2026 - currently listed CTS sitting, Hillside location
- October 7, 2026 - CTS registration deadline for that sitting
- Department (IDFPR CORE) approval must be completed before CTS registration opens for you
- The linked examination guide currently carries a 2017 copyright date; the qualifications packet was revised February 2026 - always verify you're studying the current version of each document
Because the CORE approval step has no fixed turnaround guarantee, start that application well ahead of the CTS deadline rather than counting backward from October 7. For the fuller scheduling picture, including how retesting interacts with qualification status, see IL-PD Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
After You Pass: License, Insurance, Renewal
Passing the exam is not the finish line. Before IDFPR issues the individual license, you must show proof of $1 million in general liability coverage held in your own name. Agency licensing and employee PERC registration are handled as separate processes from your individual detective license - don't assume one covers the other.
Once licensed, renewal falls on a fixed May 31 date every three years, with fees calculated at $150 per year of the cycle. Licensees must also complete eight hours of annual training, starting with the calendar year following issuance, and keep the required training records on file - this is an ongoing compliance obligation, not a one-time exam requirement.
Who actually hires people who complete this credential? Licensed private detectives in Illinois work for investigation agencies, insurance companies handling claims investigation, corporate security and asset-protection departments, and self-employed practitioners who hold their own agency license. If you're weighing whether the licensing investment fits your career goals, Is the IL-PD Certification Worth It? Complete ROI Analysis 2026 and IL-PD Salary Guide 2026: Complete Earnings Analysis cover the employment and earnings side in more depth, and IL-PD Jobs looks at where licensed detectives actually find work.
One-Week-Per-Domain Study Sprint
If you're inside your final month before the Hillside sitting (or whichever date you've registered for), allocate study time proportionally to the exam's actual weighting rather than splitting it evenly across three domains.
Federal & State Law (23 questions)
- Drill statutory limits on detective authority, privacy law, and evidence-handling rules
- Flag any "best answer" style questions where two choices seem correct - practice picking the narrowest legally accurate option
Licensing & Practice Requirements (12 questions)
- Memorize administrative rules on licensure, renewal cadence, and practice standards since this domain is small and highly memorizable
- Cross-check against the February 2026 qualifications packet, not older cached versions
Detective Practices (40 questions)
- Split time across the three subareas: Gathering Information (16), Case Management (12), Analysis/Reporting/Presentation (12)
- Run full-length 75-question, 90-minute timed simulations to build pacing since this section carries more than half the exam
This weighting-first approach is the same principle behind a full study plan - if you want the complete week-by-week build-out with topic checklists, the IL-PD Study Guide 2026: How to Pass on Your First Attempt expands each week above into daily tasks. And if you're still deciding how much runway you need, How Hard Is the IL-PD Exam? Complete Difficulty Guide 2026 and IL-PD Pass Rate 2026: What the Data Shows put the difficulty question in context.
Whichever week you're in, running timed practice sets on our practice test platform against the real 23/12/40 breakdown is the fastest way to see which domain is actually costing you points versus which one just feels hard.
FAQ
No. The published passing score is a scaled score of 70 or higher, not 70 raw correct answers out of 75 questions. Don't over-study for a 93% accuracy target you don't actually need.
Federal & State Law has 23 questions, Licensing & Practice Requirements has 12, and Detective Practices has 40, split into Gathering Information (16), Case Management (12), and Analysis, Reporting & Presentation (12).
The CTS exam fee is $298 and the separate individual license application fee is $500. Fingerprinting, exam preparation, insurance, and any agency licensing costs are additional and not included in those two figures.
Apply to IDFPR CORE first. Department approval must precede CTS registration, and you'll use your authority-to-sit/examination approval ID to register with Continental Testing Services once approved.
Individual licenses renew every three years on May 31, with renewal fees calculated at $150 per year of the cycle. Licensees must also complete eight hours of annual training starting the calendar year after issuance and retain training records.