- 175 scored questions out of 200 total; 25 are unscored pretest items; four hours allowed.
- Passing score is 500 on a 200-800 scale, administered by PSI on behalf of IDFPR.
- Analysis and Reporting (38%) and Building Science (34%) together make up 72% of the exam.
- Exam fee is $125 per attempt; retakes require at least 30 days between sittings.
Exam Snapshot: The Numbers You Must Memorize
Before you open a single practice question, lock in the mechanics of the Illinois Home Inspector License Examination (IL-HI). These are the numbers that examiners, proctors, and the IDFPR-linked PSI handbook (updated December 10, 2024) confirm, and they should be second nature by test day.
- Administered by: PSI Services, on behalf of the Illinois Department of Financial and Professional Regulation (IDFPR), Division of Real Estate.
- Total questions: 200 multiple-choice items, four options each, one best answer.
- Scored questions: 175 - the remaining 25 are unscored pretest items you cannot identify during the test.
- Time allowed: Four hours, with a separate tutorial period that doesn't count against your testing time.
- Scoring scale: 200-800, with 500 as the passing point.
- Format: Closed-book, computer-based testing at a PSI test center.
If any of these figures feel unfamiliar, pause here and review the full mechanics in the IL-HI Study Guide 2026 before moving on - this cheat sheet assumes you already understand the exam's shape and is meant for rapid recall, not first-time learning.
Domain Breakdown at a Glance
The IL-HI written exam is built from four Illinois-specific content categories. Memorize these weights - they should directly shape how many hours you spend reviewing each area.
| Domain | Weight | Study Priority |
|---|---|---|
| Analysis and Reporting | 38% | Highest - largest single category |
| Building Science | 34% | Second highest - nearly tied with Analysis and Reporting |
| Business Operations | 20% | Moderate |
| Illinois Law and Rules | 8% | Smallest, but non-negotiable for compliance questions |
Domain 1: Building Science (34%)
Covers the physical systems a licensed home inspector must evaluate: structural components, roofing, electrical, plumbing, HVAC, insulation, and moisture/ventilation interactions.
- Understand how systems interact (e.g., moisture and structural components)
- Know common defect indicators inspectors are expected to recognize
Domain 2: Analysis and Reporting (38%)
The largest domain tests your ability to interpret findings and communicate them correctly in a written inspection report - the core deliverable of the job.
- Practice translating observations into clear, defensible report language
- Understand what belongs in a report versus what falls outside scope
Domain 3: Business Operations (20%)
Covers the practical and ethical side of running an inspection business in Illinois, including client communication and professional conduct.
- Know standard business practice expectations tied to licensure
Domain 4: Illinois Law and Rules (8%)
The smallest domain, but it tests specific statutory and regulatory knowledge unique to Illinois licensure.
- Review IDFPR rules governing licensure, supervision, and conduct
For a full walkthrough of subtopics inside each domain, cross-reference the IL-HI Exam Domains 2026 guide, which breaks down all four content areas in depth.
Registration, Fees, and Retake Rules
Cost and scheduling mistakes are avoidable if you memorize these rules ahead of time.
- Exam fee: $125 per attempt.
- Initial license application fee: $250, separate from the exam fee.
- Retake waiting period: At least 30 days must pass between attempts.
- Attempt limit: Unlimited attempts are permitted within your two-year eligibility period.
- Registration expiration: Paid exam registrations expire after one year if unused.
- Cancel/reschedule window: At least two days before your scheduled appointment.
Key Takeaway
Because registrations expire after one year and retakes need a 30-day gap, schedule your first attempt only once your prelicensing and field course documentation is fully ready - don't let the clock start prematurely.
A full cost breakdown, including how the $125 exam fee and $250 application fee stack against course tuition, is available in IL-HI Certification Cost 2026. If you're weighing timing around specific windows or holidays, check IL-HI Exam Dates 2026.
Test Day Mechanics
PSI test centers run a closed-book, computer-based format. Know these logistics cold so nothing surprises you at check-in.
- Identification: Valid photo/signature ID matching your registration name exactly.
- Calculators: Silent, nonprogrammable, battery-operated calculators are allowed - no alphabetic keys, no printing function.
- Scratch paper: Supplied at the center; you do not bring your own.
- Tutorial: A separate orientation period before the timed exam begins - it does not eat into your four hours.
- Answer review: You may go back and review answers as long as testing time remains.
If you're still deciding how much runway to give yourself before test day, How Hard Is the IL-HI Exam? breaks down difficulty factors candidates report, and IL-HI Pass Rate 2026 covers what publicly available data shows.
Eligibility and Field Course Cheat Points
You cannot sit for the written exam without clearing these prerequisites first - memorize them so you can verify your own readiness.
- Minimum age: 18 years old.
- Education: High-school diploma or equivalent.
- Prelicensing coursework: 60 approved hours.
- Field course: At least 15 hours, including five inspection events plus a final field examination.
- Inspection event length: Each event lasts at least two hours.
- Supervising inspector requirements: Must hold at least five years of licensure, be active or inactive no more than two years, and supervise no more than five trainees at once.
- Final field exam: Follows all five events, includes a draft/mock inspection report, and requires a 70% score - separate from the written exam's scaled 500 passing point.
- Liability coverage: Applicants must attest to at least $100,000 in general liability coverage.
Key Takeaway
The 70% field-exam threshold and the 500 scaled written-exam score are two completely separate checkpoints - passing one does not substitute for the other.
For the full step-by-step eligibility path, including documentation you'll submit alongside your exam application, see IL-HI Requirements 2026.
CE and Renewal Cheat Points for 2026
Passing the exam is only the start; renewal rules matter immediately for planning purposes.
- Regular renewal date: November 30 of even years.
- Licensed on or before August 31, 2026: Need 12 approved CE hours for the 2026 renewal cycle, including 8 mandatory hours and applicable sexual-harassment-prevention training (an approved harassment-prevention course may count toward elective CE).
- Licensed on or after September 1, 2026: No CE obligation for the 2026 cycle; license expires November 30, 2028.
A One-Week Review Sprint
If you've already completed a full study plan and just need a final structured pass before test day, allocate your remaining time by domain weight rather than evenly across topics.
Analysis and Reporting (38%)
- Drill report-writing scenarios and defect-interpretation questions
- Review what belongs in a written inspection report versus what's out of scope
Building Science (34%)
- Review structural, electrical, plumbing, HVAC, and moisture interaction concepts
- Focus on defect-recognition patterns across systems
Business Operations (20%)
- Review professional conduct and client-communication scenarios
Illinois Law and Rules (8%) + Full Review
- Review IDFPR statutory and licensure rules
- Run a full-length timed practice session on the main practice test platform to simulate the four-hour format
This kind of weighted final sprint works because it mirrors actual exam weighting rather than treating all four domains equally. For a longer-horizon plan built the same way, revisit IL-HI Study Guide 2026.
FAQ
Of the 200 total multiple-choice questions, 175 are scored. The remaining 25 are unscored pretest items mixed in throughout the exam, and you cannot tell which is which during testing.
You need a scaled score of 500 on the 200-800 scale. This is separate from the 70% threshold required on the final field examination during your prelicensing field course.
You must wait at least 30 days between attempts. The handbook allows unlimited attempts within your two-year eligibility period, but each attempt costs $125.
Analysis and Reporting (38%) and Building Science (34%) together account for 72% of the exam, making them the two highest-priority domains for study time.
It depends on your licensing date. Those licensed on or before August 31, 2026 need 12 CE hours (including 8 mandatory hours) for the 2026 renewal. Those licensed on or after September 1, 2026 have no 2026 CE obligation and renew by November 30, 2028.
Keep this cheat sheet nearby as a quick-reference check throughout your prep, but pair it with deeper review using the full domain guide and timed practice sessions on the practice test site so the numbers above translate into actual exam-day performance.