How to Pass the National Home Inspector Exam

The National Home Inspector Exam (NHIE) is the last big hurdle between you and a home inspection license in most states. It's four hours, 200 questions, and it covers everything from grounding electrodes to pre-inspection agreements. It's also very passable if you know what's on it and study the right material.

This guide covers how the exam works, what it tests, a study plan you can follow, and the best free and low-cost resources out there.

What is the NHIE?

The NHIE is developed by the Examination Board of Professional Home Inspectors (EBPHI), an independent nonprofit founded in 1999. Many states use it as their licensing exam, and some professional associations use it for membership.

The questions come from a role delineation study: experienced inspectors from around the country define what a competent inspector needs to know, and that becomes the exam blueprint. In other words, the test reflects real field work, not textbook trivia.

One thing to check first: most candidates register through PSI, but a handful of states (and Canada) use a different testing provider. Before you register, check your state licensing board's website to see who administers the exam where you live, what it costs, and what else you need for your license. Our state-by-state home inspector licensing guide is a good place to start.

The exam at a glance

Two things are worth knowing about scoring. First, you won't know which 25 questions are unscored, so treat every one as if it counts. Second, the score is scaled, so there's no fixed "get X% right" target. Questions are weighted by difficulty and importance to safe practice.

What the NHIE costs

According to EBPHI, the exam fee is $225 per attempt in most states and in Canada. States that use their own contracted test administrator may charge a different amount, so confirm the price when you register.

Here's what to budget for:

A few fee rules that catch people off guard:

• Fees aren't refundable or transferable. Once you pay, that money is tied to your registration.
• Cancel at least 2 days ahead. If you cancel later than that, don't show up, arrive late, or forget a valid ID, you lose the fee.
• Retakes cost the full fee. There's no discount for a second attempt, which is one more reason to prepare well the first time.
• Veterans may get reimbursed. If you pass and are eligible for GI Bill education benefits, you can submit VA Form 22-0803 with your receipt and score report to request reimbursement.

What's on the exam

EBPHI's current content outline (updated December 2024) splits the exam into three domains.

Domain 1: Property and Building Inspection/Site Review (70%)

This is the bulk of the test. It's broken into 13 tasks:

Notice the newer topics: EV charging equipment, alternative energy systems and smart home technology. Older study guides may not cover them.

Domain 2: Analysis of Findings and Reporting (20%)

This covers how you communicate what you found: describing systems by type and location, stating limitations (what you didn't inspect and why), describing defects and their implications, and recommending the right professional for further evaluation. It also includes life-threatening conditions that need immediate action, like gas leaks or exposed energized wires.

Domain 3: Professional Responsibilities (10%)

Pre-inspection agreements, conflicts of interest, client privacy, insurance (general liability, E&O), and basic legal concepts like negligence and contractual responsibility.

A study plan that works

Most candidates study for six to eight weeks alongside, or right after, their pre-licensing course. Here's a simple way to structure it.

Week 1: Get a baseline. Download the content outline from EBPHI and take a practice test, like EBPHI's practice quizzes or InterNACHI's free online exam, before you study anything. Your weak spots will show up fast, and you'll stop wasting time on what you already know.

Weeks 2–5: Work through the systems. Go system by system, starting with the heaviest-weighted areas: electrical, then roofing, structure, plumbing, fireplaces and life safety. For each one, learn the common types and materials, typical defects, and the safety issues. The outline lists example defects for every task, so use it as a checklist.

Week 6: Reporting and professional practice. Together these make up 30% of the exam, and people tend to skim them. Practice spotting the answer that stays within an inspector's role. One of EBPHI's own sample questions asks about a report that tells a client replacing pitted gutters with copper ones would be "more prudent." The correct answer is that the inspector overstepped their role.

Weeks 7–8: Timed practice. Take full-length or section practice tests under time pressure. Four hours for 200 questions works out to about 72 seconds each. Review every wrong answer and note why the correct one is the best choice, not just a correct one.

A few habits that help:

• Read every option before answering. Many questions have more than one partly correct answer. You want the best one.
• Think in terms of safety and scope. When in doubt, the answer that protects people and stays within a visual, non-invasive inspection is usually right.
• Get into real houses. Ride-alongs with a licensed inspector make the material click faster than any book. Ask your local association chapter about mentoring.

Resources to help you pass

EBPHI (the people who write the exam)

• NHIE Candidate Handbook and Content Outline: The official blueprint, sample questions and test-day rules. Start here.
• Official NHIE Practice Quizzes: Paid quizzes ($15–$25 each) written in the same style as the real exam. Good for checking readiness near the end of your studies.
• NHIE Home Inspection Manual: EBPHI's own reference book, listed in the candidate handbook as a study reference.

InterNACHI

• Free NHIE Prep Webinar Series: A free 2026 series organized by exam topic: Site & Exterior, Roof & Structure, Electrical & Plumbing, HVAC & Fireplaces, Insulation & Ventilation, Interior & Appliances (Nov. 11), and Ethics & Professional Responsibilities (Dec. 9). Past sessions are worth catching on replay.
• Free Online Inspector Exam: 120 questions in 60 minutes, free with a guest login, and you can retake it as often as you like. It isn't the NHIE (it's based on InterNACHI's Standards of Practice), but it's a quick, no-cost way to test your knowledge.
• InterNACHI Online Courses: A large library of system-by-system courses, free for members.
• InterNACHI Standards of Practice: Useful for understanding what's in and out of scope during an inspection.

ASHI (American Society of Home Inspectors)

• ASHI Standard of Practice and Code of Ethics: One of the industry's most widely referenced standards. Reading it is one of the best ways to prepare for the reporting and professional responsibility questions.
• The ASHI School: Pre-licensing courses offered in classroom and online formats, approved in a number of states. Check your state board's approved provider list.
• ASHI local chapters: Monthly meetings, education sessions and a good place to find a mentor or ride-along.

Codes and technical references

• International Residential Code (IRC) 2021: The ICC lets you read the IRC free online. EBPHI lists it as a reference. You don't need to memorize code sections, but knowing common requirements (stair dimensions, guard heights, egress) helps a lot.
• NFPA 70 (National Electrical Code) and NFPA 101 (Life Safety Code): Also listed as references by EBPHI. NFPA offers free read-only access to its codes with an account.

Your state licensing board

Your board is the final word on eligibility, required training hours, fees, field inspection requirements and how to submit your passing score. EBPHI links to every state's regulator from homeinspectionexam.org.

Test day tips

• Arrive at least 30 minutes early. Late arrivals can be turned away and lose the fee.
• Bring one valid, unexpired government-issued photo ID with a signature that matches the name you registered under.
• Leave your phone, smartwatch and bag in the provided storage. Scratch paper and a pencil are provided, and only basic non-programmable calculators are allowed.
• Use the 15-minute tutorial. It doesn't count against your four hours.
• You can go back and change answers before time runs out, so don't get stuck. Mark tough questions and come back.

After you pass

You'll see your result on screen right away. From there, follow your state's process to submit your score and complete your license application, then line up insurance and start building your business.

FAQ

How many questions are on the National Home Inspector Exam? 200 multiple-choice questions. 175 are scored and 25 are unscored pretest questions.

What score do you need to pass the NHIE? The exam is scaled from 200 to 800, and 500 is passing. Because questions are weighted, there's no fixed percentage you need to hit.

How long is the NHIE? Four hours, plus an optional 15-minute tutorial before the clock starts.

What happens if I fail? You'll get a diagnostic report showing your performance by domain. You can retake the exam after 30 days, as many times as you need, paying the fee each time.

Is InterNACHI's online exam the same as the NHIE? No. InterNACHI's free exam is based on its own Standards of Practice. It's good practice, but it isn't the licensing exam.

How much does the NHIE cost? EBPHI lists the fee as $225 per attempt in most states and in Canada. Some states that use their own testing provider charge a different amount, and retakes cost the full fee, so confirm the price with your state board or when you register.