CSMI Exam Dates 2026: Testing Windows, Deadlines & Scheduling

Why There Is No Fixed 2026 Exam Calendar

If you searched for "CSMI exam dates 2026" hoping to find a list of quarterly sitting dates, here is the most useful thing to know up front: the Council-certified Structural Mold Investigator (CSMI) credential, governed by the American Council for Accredited Certification (ACAC), is not scheduled like a once-a-season paper exam. The exam is delivered through Kryterion, Inc., at authorized testing centers or through secure online video proctoring, and an instructor-proctored vocational option exists by arrangement. That delivery model means your "date" is largely something you and the testing provider arrange after your application is in good standing.

We are deliberately not publishing a list of invented 2026 testing windows. ACAC's public materials for the CSMI describe the application, eligibility and exam format, but they do not establish a numbered 2026 exam version or a fixed national sitting calendar. Anything that claims otherwise should be treated with caution until you verify it on ACAC's own pages. If you are still orienting yourself to the credential itself, our explainer on what CSMI certification is covers the basics before you start planning dates.

How CSMI Scheduling Actually Works

Think of scheduling as a sequence of gates rather than a single appointment. The pathway published by ACAC for the CSMI runs roughly like this:

1. Attest to current employment in structural mold investigation.
2. Submit the application through ACAC's Microbial Consulting application process.
3. Complete identity verification.
4. Pass the examination (70% required).
5. Receive certification-board approval.

Notice what is absent: there is no minimum number of experience years specified, no compulsory preparatory course, and CSMI applicants are explicitly exempt from project sheets, which other ACAC credentials require. That does not mean the credential has no prerequisites. Current employment in the field is still required, a point we unpack in our guide to CSMI requirements and eligibility.

Where the exam sits in the sequence

Because eligibility hinges on an employment attestation and an application, the practical constraint on your timeline is usually not seat availability but your own readiness and paperwork. Candidates who treat the exam date as the first step often end up with a booking they cannot use. Get your application squared away, then schedule against the timeline you have realistically prepared for.

The Application Window: Six Months or 90 Days?

This is the single most important date-related detail, and it is also where public sources disagree. The current online application gives candidates six months. The handbook, however, retains 90-day and notarized-paper wording. Both appear in ACAC materials, so the safest approach is to follow the instructions shown in the live application you are actually filling out and to confirm the operative deadline with ACAC directly before you commit to a study schedule.

Where and How You Can Sit the Exam

Kryterion offers two main delivery routes, and your choice affects how flexible your date can be.

Authorized testing center

You sit the exam at a physical Kryterion site. This suits candidates who want a controlled environment and do not trust their home setup. Availability depends on the location you choose, so check your nearest center early rather than assuming a convenient slot will be open the week you are ready.

Secure online video proctoring

You test remotely under video proctoring. This generally offers the most scheduling flexibility, but you are responsible for a compliant environment and technical setup. Run any system check the provider offers well before test day.

Instructor-proctored vocational option

For some training contexts, an instructor-proctored vocational option is available by arrangement. Because this is arranged rather than self-scheduled, your date will depend on the instructor or program, not on open booking. Ask the program how and when sittings are offered.

The exam itself is the same regardless of route: 50 multiple-choice questions, two hours, closed book, at least four answer choices per question, and a 70% passing score. Question and answer order is randomized, and you receive results immediately on screen and by email. Note that the two-hour limit is the written examination duration, not course or practical-assessment hours, and ACAC's general examinations page lists a broader 75-120-question range that does not reflect the CSMI-specific 50-question format. For the numbers behind the threshold, see our breakdown of the CSMI passing score.

Fees and Payment Timing

Money and dates interact, because you cannot finalize a booking without the fees in place. All amounts below are in USD and come from ACAC's published structure.

The practical takeaway: a failed attempt costs a retake fee, not a full restart of the $400 initial outlay. That affects how aggressively you schedule. A candidate who books too early and needs a second sitting pays $100 more, plus the time lost. For the full picture including renewal, read our CSMI certification cost breakdown, and confirm current amounts on ACAC's fees and payments page before paying.

Planning Backward From Your Test Date

Rather than hunting for a "2026 window," pick a target sitting and build backward. The exam rewards knowledge of four reference sources, and ACAC is explicit that highlighted sections of the study guide are not a complete boundary on examinable material; the full references are expected. The preparation categories are unweighted, so do not assume one carries more questions than another.

The body of knowledge covers structural mold sources, potential health effects, and methods of locating and identifying microbial contamination. Our guide to the four CSMI content areas explains how each reference maps to those topics.

A sample sequence tied to the references

This is the only study-planning section in this article, and it is anchored to the specific sources rather than generic advice. Adjust the length to your own experience.

If you want a deeper sequence, our CSMI study guide expands this, and the CSMI cheat sheet works well as a final-week skim. To rehearse the format itself, use the CSMI practice tests.

After You Test: Results, Retakes and the Two-Year Clock

Because results are delivered immediately and by email, you will know the outcome as soon as you finish. Passing the exam is necessary but not sufficient: certification still requires certification-board approval, which is part of the application pathway rather than something the exam alone grants. Also note that completing a course or passing an exam solely for state licensing does not confer ACAC certification, and this vocational designation is not CESB-accredited, unlike the separate CMI and CMC credentials.

The two-year validity period

Once certified, your credential is valid for two years. Renewal requires an updated photo and 40 recertification credits: 10 for continued field activity plus 30 professional-development hours, with supporting records retained for audit. Treat renewal as a calendar item from day one, since the work of collecting credits happens across the two years, not in the final month. Our analysis of whether the CSMI is worth it weighs these ongoing costs against career value.

Reading the reported pass statistic carefully

ACAC's 2025 Exam Pass Ratio report, which we could not re-fetch for this update, is reported as showing 29 passes from 32 exam administrations, rounded to 91%. That figure reportedly includes retakes and exams taken solely for state licensing, so it is not a first-attempt rate and not a guarantee for any individual. It is also a different thing from the 70% passing threshold you must meet on the exam itself. Read our CSMI pass rate analysis for the cautious interpretation.

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