CPI

InterNACHI® Certified Professional Inspector (CPI)® Online Inspector Exam

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About this exam

The Certified Professional Inspector (CPI)® is a United States federally registered certification mark for the building inspector professional credential, registered on the Principal Register at the USPTO. Per the USPTO description quoted by the certifier, the mark certifies that inspections of residential and commercial buildings were performed by an inspector who has met the online examination requirements established by the certifier. To use the CPI® certification and logo, an individual must be certified by InterNACHI®, which includes passing the Online Inspector Exam. InterNACHI® School, accredited as a nonprofit post-secondary educational institution (college) by ACCET, provides the training, certification, and Certified Professional Inspector® credential.

The credential is aimed at practicing and aspiring home inspectors who want a recognized designation, and the exam is built on the Home Inspector Job Task Analysis, which lists the tasks a CPI® may perform plus the knowledge, skills, and abilities (KSA) required to perform them competently. That job task analysis is the foundation of a valid credentialing program and identifies core knowledge areas, critical work functions, and skills found across current practitioners. To prepare, start with the CPI requirements page, then work through the free online training and continuing education available to members, which is self-paced and includes certification at no additional charge once you are ready. This page is independent study material and is not affiliated with or endorsed by InterNACHI®.

What you'll study

Common questions

About CPI preparation

What exactly is the CPI® credential?

It is a United States federally registered certification mark for the building inspector professional credential, registered on the Principal Register at the USPTO. The mark certifies that inspections of residential and commercial buildings were performed by an inspector who met the certifier's online examination requirements. InterNACHI® owns the mark and issues the credential through InterNACHI® School.

What is the exam format?

The source describes it as the Online Inspector Exam, taken online at the exam page referenced on the certification page. Passing it is one requirement for using the CPI® certification and logo. The source does not publish question counts, time limits, or passing scores, so confirm those details on the official exam page before you sit it.

What content does the exam cover?

The credential is grounded in the Home Inspector Job Task Analysis, which lists the tasks a CPI® may perform and the knowledge, skills, and abilities required to perform them competently. It identifies core knowledge areas, critical work functions, and skills typical across current practitioners. Use that task list as your study outline rather than guessing at topics.

How should I order my studying?

Start with the CPI requirements page to confirm eligibility, then read the Home Inspector Job Task Analysis and map each task and KSA to a study block. Work through the free online courses and continuing education at your own pace, then take the exam when you consistently understand the task list. Members get unlimited access to training and CE.

How long does preparation take?

The source gives no fixed timeline; training is self-paced, and certification is available at no additional charge when you are ready. Members have unlimited access to free online training and continuing education, and InterNACHI® offers over 1,000 hours of free online education. Plan around your own schedule and prior inspection experience.

Can I retake the exam if I fail?

The source does not state a retake policy, number of attempts, or waiting period, so treat this as unconfirmed and check the official exam page. Do not assume unlimited immediate retakes. Before retesting, review the job task analysis and the specific knowledge areas where you were weakest.

Why do candidates fail, and how do I avoid it?

The most common cause is studying generic inspection trivia instead of the published job task analysis, which defines the tasks and KSAs the credential is built on. Another is skipping the free course material before attempting the exam. Map each task and KSA to a study block and review weak areas before testing.

What do I get after passing?

You become certified by InterNACHI® and may use the Certified Professional Inspector (CPI)® certification and logo, often abbreviated CPI or C.P.I. Members also gain access to more than 60 additional inspector certifications and credentials, plus marketing support such as logos, decals, apparel, and patches.

Can anyone use the CPI® designation?

No. The mark is a certification mark used by inspectors who qualify for the credential designation. InterNACHI® states that unqualified use of Certified Professional Inspector®, CPI, or C.P.I. in marketing infringes and dilutes its marks, and it demands that such use cease and desist, including removal from websites and printed materials.

Is this page official?

No. This is independent study material written for candidates researching the exam. It is not affiliated with, endorsed by, or sponsored by InterNACHI®. Always verify requirements, exam logistics, and credential rules on the official InterNACHI® pages before relying on them.