CMCI Pass Rate 2026: What the Data Shows

What the Public Data Actually Shows

Candidates searching for the CMCI exam pass rate usually want one number: the percentage of people who pass on the first try. For the Council-certified Moisture Control Investigator credential, that number is not published in the sources reviewed for this article, and any site that quotes one is either guessing or borrowing from a different credential.

The Council-certified Moisture Control Investigator credential is issued and administered by the American Council for Accredited Certification (ACAC). Certification decisions are made by its CMCI Certification Board, and Kryterion, Inc. provides the testing platform. ACAC publishes a document titled the 2025 Exam Pass Ratio, and that document contains no CMCI row. This article, last checked in October 2026, reports exactly that and nothing more.

Pass Rate vs. Passing Score: Two Different Numbers

These two terms get conflated constantly, and the confusion is where most bad "pass rate" claims come from.

The 75% criterion tells you how many of the 100 questions you need to answer correctly, in the sense of the board's standard. It says nothing about how many people meet it. A modified Angoff process asks subject-matter experts to estimate how a minimally competent candidate would perform on each question, and the resulting cut score is anchored to competence rather than to a target percentage of passers. That is why a published passing score can sit alongside an unpublished or unavailable pass rate without contradiction.

For the exact scoring details, our CMCI passing score guide covers what the 75% criterion means in practice.

Why ACAC's 2025 Pass-Ratio Document Has No CMCI Row

The absence of a CMCI line in ACAC's 2025 document can be read several ways, and it is worth being disciplined about which readings the evidence supports.

• What is established: the document has no CMCI row.
• What is not established: why. The issuer has not explained the omission in any source reviewed.
• What would be a mistake: treating the omission as a pass rate of zero, as evidence of an unusually hard or easy exam, or as a reason to import another credential's figures.

There is a second source of confusion worth naming. "CMCI" is also an acronym used by other, unrelated credentials, including construction-management certifications from other bodies. Pass-rate figures that circulate for those programs have no connection to ACAC's Council-certified Moisture Control Investigator exam. If a number comes from a page that does not name ACAC, discard it. Our explainer on what CMCI stands for helps keep the credentials straight.

What Shapes CMCI Difficulty Without a Published Rate

With no pass percentage to lean on, difficulty has to be assessed from the structure of the exam itself.

Format

• 100 multiple-choice questions with at least four answer choices each.
• Three hours, which works out to roughly 1.8 minutes per question if you spend the time evenly.
• Closed book. You cannot consult the EPA guidance or the drying text during the exam.
• Randomized question and answer order, so memorizing positions of answers does not work.
• Immediate results on completion.

Scope

The exam objectives span nine domain lines, from the science of water through structural drying and project documentation. ACAC does not publish percentage weights or question allocations by domain, so you cannot safely skip an area on the theory that it carries few questions. Candidates also need working knowledge of the ACAC Code of Conduct, which the handbook lists among its headings even though the dated chart treats ethics as additional required knowledge rather than a separate domain line.

Style

Investigation work is scenario-driven: a reading, an observation, a limitation of the instrument, and a decision about what to do next. Expect to be asked to reason from evidence, such as when a meter reading justifies a conclusion and when it only justifies further investigation. Memorizing definitions without practicing that reasoning is the most common gap. The nine-domain content guide breaks down what each area expects.

The Eligibility Filter Before Anyone Sits the Exam

Pass-rate conversations often ignore a structural fact: CMCI candidates are screened before they ever see a question. Applicants must qualify through one of two routes.

• Experience route: a high-school diploma or GED plus two years of documented relevant moisture-control field experience.
• Education route: a qualifying two-year postsecondary degree, or the equivalent of 15 qualifying science-related credits, plus at least one year of relevant experience. Relevant fields include engineering, science, architecture, industrial hygiene and related sciences.

The application package involves four project sheets, applicable education transcripts, application verifications, an electronic affidavit with required email verifications, examination, and unanimous certification-board review. The handbook also requests employer affidavits. A prep course is optional.

This matters for interpreting any pass-rate claim, published or not. A population that has already documented years of field work behaves differently from an open-enrollment exam population, so even a hypothetical CMCI figure would not translate to a general audience. Details of the routes are in our CMCI requirements guide.

Nine-Domain Readiness Map

Because no weights are published, treat the nine domain lines as equally likely to matter. The grouping in the handbook differs from the dated chart, and the handbook does not separately label Plumbing or Project documentation, so use the chart's headings as your checklist and the handbook as a cross-check.

The prescribed references are the ACAC Code of Conduct, the EPA's Moisture Control Guidance for Building Design, Construction and Maintenance (December 2013), and Leadership in Restorative Drying by Ken Larsen and colleagues. The handbook's selected review pages supplement those texts and do not establish exhaustive exam coverage, so reading the full references matters. The CMCI cheat sheet is useful for last-pass review, not as a substitute.

Study-Readiness Checks Instead of Statistics

When the pass rate is unknowable, personal readiness evidence is the better signal. Use these checks for each of the nine domains.

1. Explain without notes. Can you explain the domain's core mechanisms aloud, in plain language, without opening a reference?
2. Reason from a reading. Given an instrument reading and a described condition, can you state what it supports, what it does not, and what you would check next?
3. Name the limitation. For each instrument or method, can you name at least one way it misleads?
4. Trace to a source. Can you tie each concept to the EPA guidance or the drying text rather than to a forum answer?
5. Score honestly. On timed practice, are you clearing 75% in every domain, not just on average? A strong domain can mask a weak one in a blended score.

Be careful with third-party question banks. Some preview material labelled CMCI on public marketplaces includes generic quality or process-control scenarios that have little to do with moisture investigation, and a label or partial preview does not establish complete or accurate coverage. Practice questions are only as good as their alignment to the official objectives. Our CMCI study guide and the practice test site are built around the nine domains.

Sequencing the Domains Over Eight Weeks

This is the one structured study plan in the article, and it is ordered by dependency: foundations of water science first, documentation last, because documentation questions assume you already know what you are documenting.

Exam-Day Mechanics That Affect Your Result

Preventable logistics cost candidates more than they expect, and these rules come from ACAC's delivery arrangements rather than from any other certification program.

• Delivery: testing center or online with video proctoring through Kryterion.
• Online requirements: your own computer, an approved webcam, a private location and a continuous 2 Mbps upload and download connection.
• Closed book: no references during the exam.
• Timing: three hours for 100 questions; flag hard items and return rather than stalling.
• Results: immediate on completion.

Confirm identification and check-in requirements with ACAC and the testing provider directly before exam day. A failed webcam or unstable connection can end an online attempt before it starts. Scheduling windows are covered in our CMCI exam dates guide.

Retakes, Fees and the Cost of a Miss

The initial US and Canada fee is USD 500, made up of USD 100 for the examination and USD 400 for certification covering the first two-year term. ACAC's current official application quotes USD 525 outside the US and Canada. A retake costs USD 100.

That retake figure is the practical way to think about risk. A miss is a USD 100 and scheduling cost rather than a restart of the whole application, which is a reason not to over-delay your first attempt chasing certainty that no statistic can provide. It is also a reason not to treat the exam casually. Full pricing, including renewal, is in the CMCI certification cost breakdown, and whether the investment pays off is examined in the ROI analysis.

Certification is valid for two years. Renewal costs USD 400 and requires 40 renewal credits: 10 for continued field activity plus 30 professional-development hours under current procedures, with records retained for audit.

Frequently Asked Questions