CETI Passing Score 2026: Exactly What You Need to Pass

The Number: 75% and What It Means

The Council-certified Environmental Thermography Investigator (CETI) credential is issued by the American Council for Accredited Certification (ACAC), and the passing threshold is at least 75%. That figure is verified in the current Official CETI Application. If you are searching for the exact score to hit, that is the answer: 75% or higher.

Two caveats are worth stating up front, because many candidates assume more than the published materials support:

• The 75% threshold is a minimum, not a target. Aim above it. A candidate who scores right at the line has no margin for a misread question.
• ACAC has not published how the score is reported. The sources checked do not specify whether results arrive as a percentage, a scaled number, or a simple pass/fail notice, nor do they spell out a question count. Plan around the percentage threshold and confirm reporting details with ACAC when you apply.

What Is Actually Being Scored

The CETI is a credential for people who investigate buildings with infrared thermography. Unlike credentials that test pure recall, this one is built around whether you can interpret thermal evidence correctly. ACAC's listed application competencies are organized under four headings, and the same source also describes thermal and infrared physics along with infrared-camera selection, calibration and operation.

That combination tells you what the score reflects:

• Scientific foundations: how infrared energy behaves, what a thermal image does and does not show, and how conditions affect readings.
• Equipment competence: choosing, calibrating and operating an infrared camera properly.
• Applied investigation skill: using thermography to evaluate roofs, building exteriors, building interiors and plumbing systems.

The four supplied headings are unweighted in the published material. ACAC does not state that each domain carries equal weight, and it does not provide a percentage breakdown, so do not assume any area is "lighter" than another. The full domain walkthrough is in CETI Exam Domains 2026: Complete Guide to All 4 Content Areas.

Exam Format and Delivery

ACAC's general examination policy describes the testing experience:

• Closed-book: no reference materials during the exam.
• Computer-delivered: you answer on a screen, not on paper.
• Multiple choice: each question offers at least four answer choices.
• Two delivery options: test centers or secure online video proctoring. The testing provider is Kryterion.

Because the exam is closed-book multiple choice, your preparation should emphasize recognition and judgment: looking at a described thermal scenario and choosing the most defensible interpretation among several plausible-sounding options. Questions with four or more choices reward candidates who can eliminate distractors using first principles, not just memorized definitions.

The Application Steps That Come Before the Exam

For the CETI, the exam is one stage of a larger process. You have to qualify before you sit for it, and your score only matters once that groundwork is complete. The published requirements include:

1. Eligibility: two combined years of relevant science-related postsecondary education and field experience. ACAC's eligibility FAQ requires at least one actual year of field experience, so education alone cannot cover the whole requirement.
2. Documentation: transcripts when you claim education credit, plus verifiable investigation reports or contracts for relevant investigations, consulting or report writing.
3. Four separate project sheets: submitted along with the online application and email verifications.
4. No mandatory training course: you are not required to complete a specific class before applying.
5. Six-month window: complete the entire application process, including the examination, within six months.

That six-month window is the practical deadline that shapes your study calendar. Do not start the application and then let preparation drift. For a full breakdown of eligibility, read CETI Requirements 2026: Eligibility, Prerequisites & How to Qualify, and for scheduling logistics see CETI Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Fees, Retakes and Renewal Costs

Knowing the passing score also means knowing what a miss costs you. The fee structure published by ACAC is straightforward:

The retake fee is the number that matters most for your strategy. A $100 retake is modest compared with the $500 initial total, but it still costs you time inside a six-month completion window. A first-attempt pass saves money and avoids schedule pressure. See CETI Certification Cost 2026: Complete Pricing Breakdown for the full picture, and Is the CETI Certification Worth It? Complete ROI Analysis 2026 if you are weighing the investment.

The Four Competency Areas to Master

To clear a 75% threshold, you need working command of all four areas ACAC lists. Here is what each one demands in practice, framed around the thermography concepts that tie them together.

Underneath all four sits the same foundation: infrared physics and the selection, calibration and operation of the camera. Questions in any domain can lean on those fundamentals, so do not treat them as a separate topic to cram at the end. For topic-by-topic prep, see the CETI Study Guide 2026: How to Pass on Your First Attempt and the condensed CETI Cheat Sheet 2026: One-Page Review of Must-Know Facts.

What ACAC Has Not Published

An honest answer to "what do I need to pass" includes what is still unknown. As of the sources checked, several details you might want are not available:

• No full exam blueprint. The four headings reproduce the issuer's listed application competencies. They are not presented as an exhaustive blueprint or an official total domain count.
• No domain weights. The headings are unweighted, so any claim that one area is worth a specific percentage is not supported.
• No syllabus in the handbook. The linked candidate handbook page contains no syllabus text.
• No published pass rate. ACAC's December 31, 2025 activity report lists 3 current CETI certifications. That is a count of current holders, not exam volume, so it cannot be turned into a pass rate. Our overview at CETI Pass Rate 2026: What the Data Shows explains why.

Sequencing Your Prep by Domain

Since the content is unweighted and the exam is closed-book, the goal is even coverage with extra time on the foundations that run through every domain. One compact way to sequence it:

Scheduling environmental-condition topics (roofs and exteriors) together makes sense because the same variables, such as sun, wind and ambient temperature, drive both. Interiors and plumbing pair well because both ask you to infer a hidden cause from a thermal clue. Finish with mixed, timed practice on our CETI practice tests so you are comfortable switching between domains the way a real exam forces you to. If you want structured question practice, start at the main practice test site. For training options, see CETI Training, keeping in mind that no specific course is mandatory.

After You Pass: Approval and Renewal

Clearing 75% is necessary but not sufficient. Certification requires unanimous board approval, so a passing exam result feeds into a board decision rather than ending the process. Once certified, the credential is valid for two years.

Renewal planning deserves attention early, because ACAC's published materials are not fully consistent:

• The central renewal procedure requires 40 RCs: 10 for continued field activity and 30 hours of professional development.
• The credential page instead describes 20 professional-development hours annually.

These do not obviously match, so confirm the current requirement with ACAC when you plan your renewal. Renewal costs $400. To understand how the credential fits into a career, explore CETI Jobs and the CETI Salary Guide 2026: Complete Earnings Analysis. If you are new to the credential itself, What Is CETI Certification? and What Does CETI Stand For? cover the basics.

Frequently Asked Questions