CETI Exam Dates 2026: Testing Windows, Deadlines & Scheduling

Why the CETI Has No Fixed Exam Calendar

If you came looking for a neat table of 2026 testing windows with registration cutoffs and result-release dates, here is the honest answer: the sources reviewed for this article do not publish one. The Council-certified Environmental Thermography Investigator (CETI) credential is issued by the American Council for Accredited Certification (ACAC), a CESB-accredited certifying body, and the materials checked (the competency page, the candidate handbook links, the application process page, the official application form, the exam administration page and the fee schedule) describe a process-driven path rather than a set of seasonal exam dates.

That is a meaningful distinction. Many certifications run on a fixed cycle, such as a spring window and a fall window, and candidates plan backward from the cutoff. The CETI is structured differently: you submit an application, it is reviewed, and your examination is scheduled as part of that process. Your timeline is therefore built around your own readiness and ACAC's review, not around a public calendar.

The Six-Month Clock That Actually Sets Your Deadline

The single most important timing rule in the CETI process is this: you must complete the application process, including the examination, within six months. That sentence does more to define your "exam date" than any calendar would. It means you should not open the application until you are close to ready to test.

Think of the six months as a container with several things competing for space inside it:

• Application preparation: gathering transcripts, report samples and project sheets (more on these below).
• Review and verification: email verifications must be completed, and approval requires unanimous board approval, so this step has real elapsed time attached.
• Exam scheduling and sitting: booking the delivery method and actually taking the test.
• A buffer: because a failed attempt and retake still has to fit inside the same window.

The practical consequence is that studying should largely happen before you start the clock, or at least overlap with it only partially. A candidate who submits an application and then begins learning building-envelope thermography from scratch is spending their six months twice.

How Scheduling Works: Application, Approval, Testing

Because there is no published seat-booking calendar, it helps to understand the sequence of events that leads to your exam appointment. Based on ACAC's published process:

1. Confirm eligibility. You need two combined years of relevant science-related postsecondary education and field experience, and ACAC's eligibility FAQ requires at least one actual year of field experience. Our CETI requirements guide walks through how education and experience combine.
2. Complete the online application. This includes four separate project sheets and supporting documentation: transcripts if you are claiming education, and verifiable investigation reports or contracts covering relevant investigations, consulting or report writing.
3. Complete email verifications. ACAC verifies your claims, which depends on third parties responding. Build slack into your plan for this.
4. Board review. Certification requires unanimous board approval.
5. Take the examination. Computer-delivered, closed-book, multiple choice.

Notice that the exam is one step in a chain, and several links in that chain are outside your control. That is why the six-month container matters so much: the parts you cannot accelerate (verifications, review) eat into the time you do control.

No mandatory training course

There is no mandatory training course for the CETI, which removes one common scheduling bottleneck. You are not waiting for a cohort to start or a class seat to open. The trade-off is that you must self-direct your preparation. If you are weighing whether formal coursework is worth adding, see our notes on CETI training.

Test Center or Online Proctoring

ACAC's general examination policy specifies closed-book, computer-delivered multiple-choice testing with at least four answer choices per question. Delivery is available through test centers or secure online video proctoring, and the testing provider is Kryterion.

That gives you two scheduling paths, each with its own considerations:

Neither option changes the content or the passing standard. Whichever you choose, confirm the specific technical and identification requirements with ACAC and Kryterion when you schedule. If you plan to test remotely, do not leave the equipment check until exam morning. Given that the CETI is a thermography credential, you may be comfortable with technology, but proctoring software has its own quirks.

Fees and When You Pay Them

Scheduling and money are linked, because the fee structure shapes when it makes sense to apply. Per the fee sources checked:

Two timing implications stand out. First, the $100 retake fee is modest relative to the initial cost, but a retake still has to occur within your six-month process window, so a failed first attempt compresses your remaining time. Second, the $400 renewal comes around on a two-year cycle, which means budgeting should extend past the initial exam. For a fuller breakdown, see our CETI certification cost guide, and for a return-on-investment view, is the CETI certification worth it.

Building Your Own 2026 Timeline Around the Four Domains

Since you control the pacing, the useful question becomes: how should you sequence your preparation? The competency headings on the ACAC page break the credential into four areas. These are listed as the issuer's application competencies and are unweighted, so do not read them as an exhaustive exam blueprint. The same source also describes thermal/infrared physics and infrared-camera selection, calibration and operation, which underpin all four areas.

For the fuller picture of how these areas fit together, read our CETI exam domains guide. Because the headings are unweighted and no complete blueprint is published (the linked handbook page contains no syllabus text), your safest approach is to prepare evenly rather than guessing which area will dominate.

A sequencing plan tied to CETI content

Since fundamentals feed every domain, a sensible order is to build the physics and camera-operation base first, then move through the four building areas. This is the one place a week-by-week structure earns its keep. Adjust the length to your own situation; the point is the order.

You can pressure-test each block with scenario-style questions on our CETI practice test site, and our CETI study guide expands on how to approach the material. A one-page recap is available in the CETI cheat sheet.

Retakes, Renewal and the Two-Year Cycle

Planning your dates does not end at the exam. Two further timing elements affect your 2026 plan.

If you need a retake

The retake fee is $100. The passing threshold is at least 75%, verified in the current Official CETI Application, so confirm the standard on the form you are using. Because your whole process must finish within six months, a retake is easiest to absorb if you did not use your full window before the first attempt. For context on difficulty and what the threshold means in practice, see how hard the CETI exam is and the CETI passing score. For results data, our CETI pass rate article explains what is and is not publicly known.

Renewal after you pass

Certification is valid for two years. The central recertification procedure requires 40 renewal credits (RCs): 10 for continued field activity and 30 hours of professional development. However, the credential page instead describes 20 professional-development hours annually. These two descriptions do not line up neatly, so confirm the current requirement with ACAC when planning renewal rather than assuming either figure is final.

What to Have Ready Before You Apply

Because the six-month clock governs the process, preparing your documents first protects your timeline. Gather these before you open the application:

• Transcripts if you are claiming postsecondary education toward the eligibility requirement.
• Verifiable investigation reports or contracts showing relevant investigations, consulting or report writing. Verifiability matters, since ACAC performs email verifications.
• Four separate project sheets, each describing a distinct project.
• Contact details for verifiers, with a heads-up to those people that a verification email is coming.
• Payment method and the correct fee total for your location.

Who benefits most from this credential? People doing building-envelope, roof, moisture and plumbing investigations, including inspectors and consultants who write reports. For a sense of the work and employer landscape, see our pages on CETI jobs and the CETI salary guide. If you are still orienting yourself, what is CETI is a good starting point, and our CETI exam dates hub keeps the scheduling picture in one place.

Frequently Asked Questions