- The Number: 75% on a 120-Question Exam
- How the Modified Angoff Method Sets the Bar
- What 75% Looks Like Across Five Domains
- Exam Format and Question Style
- Reading the 66% Pass Ratio Correctly
- Scoring, Delivery and Exam-Day Mechanics
- Passing the Exam Is Not the Same as Being Certified
- If You Miss the Mark: Retake Economics
- A Domain-Ordered Plan Built Around the 75% Line
- Frequently Asked Questions
- The CFST passing score is 75%, set by ACAC using the modified Angoff method.
- The exam has 120 multiple-choice questions, 3 hours, closed book.
- ACAC's 2025 pass ratio of 66% (10 of 15) includes retakes and state-licensing-only exams.
- A retake costs $100; the first two-year term costs $500 in the US/Canada.
The Number: 75% on a 120-Question Exam
The Council-certified Fire and Smoke Damage Technician (CFST) examination, administered by the American Council for Accredited Certification (ACAC), has a published passing score of 75%. The exam is a closed-book, written examination of 120 multiple-choice questions, each with at least four answer choices, delivered over 3 hours.
If every question carried equal weight, 75% of 120 works out to 90 correct answers. That arithmetic is a reasonable planning target, but treat it as a guide rather than a guarantee. ACAC publishes the passing percentage; it does not publish a raw-score conversion table in the handbook or the domain chart we reviewed, so candidates should not assume a specific scaled-score formula beyond the 75% threshold itself.
Just as important is what the number does not tell you. ACAC does not publish percentage weights for the five exam domains, so there is no official statement of how many of the 120 questions come from each area. Any article claiming "Domain 3 is 25% of the exam" is inventing a figure. We do not do that here, and neither should your study plan. For a deeper walk through the content areas, see our complete guide to all 5 CFST content areas.
How the Modified Angoff Method Sets the Bar
ACAC states that the 75% passing score was set using the modified Angoff method. This is a standard-setting technique used across professional certification. In general terms, a panel of subject-matter experts reviews each exam question and estimates the probability that a minimally qualified candidate would answer it correctly. Those judgments are aggregated, often with discussion and revision, to produce a defensible cut score.
For you as a candidate, three practical implications follow:
- The bar is competence-referenced, not curve-referenced. You are not competing against other test-takers on exam day. Your result depends on whether you demonstrate the knowledge a minimally qualified fire and smoke damage technician should have.
- Questions are written around real practice. Angoff panels judge items by asking what a competent practitioner would know, so expect scenario and application questions rather than trivia.
- The cut score is deliberate. A 75% threshold is not an arbitrary round number; it reflects the panel's judgment of the minimum acceptable level of mastery for the credential.
If you want to gauge how demanding that standard feels in practice, our CFST difficulty guide breaks down where candidates tend to struggle.
What 75% Looks Like Across Five Domains
The exam draws from five domains, taken from ACAC's CFSC and CFST Examinations chart (approved March 20, 2024). Because no domain weights are published, the safest interpretation of a 75% passing score is that you need broad, reliable competence across all five areas rather than excellence in one or two.
| Domain | What it covers at a glance | Why it matters for the 75% line |
|---|---|---|
| Domain 1: General Knowledge | Foundational concepts underlying fire and smoke damage work | Vocabulary and principles reappear inside questions from every other domain |
| Domain 2: Site Characterization | Assessing the loss site and understanding what happened | Scenario questions often begin here before moving to sampling decisions |
| Domain 3: Sample Collection | Choosing and collecting samples correctly | Procedural questions where small details separate right from nearly right |
| Domain 4: Sample Analysis, Data Interpretation & Report Writing | Turning results into defensible conclusions and reports | Interpretive reasoning questions that reward careful reading |
| Domain 5: Remediation | Restoring the property based on findings | Applied questions linking earlier findings to cleaning and restoration decisions |
Notice how the domains mirror the workflow of an actual investigation: understand the fundamentals, characterize the site, collect samples, analyze and report, then remediate. A weak link anywhere in that chain can cost you points in several places, because the exam tends to test the chain rather than isolated facts.
Domain 4: Sample Analysis, Data Interpretation & Report Writing
This domain is where technical judgment is most visible. Candidates should be comfortable reasoning from data to conclusions.
- Distinguishing what a result actually supports from what it merely suggests
- Recognizing limitations in sampling and analysis when interpreting findings
- Understanding what a defensible investigative report must communicate
For a structured approach to each area, our CFST study guide maps preparation activities to these domains.
Exam Format and Question Style
Knowing the format helps you convert knowledge into points. The CFST exam consists of multiple-choice items with at least four answer choices each, and it is closed book. That means no reference materials during the test; you must recall terminology, procedures and decision logic from memory.
With 120 questions in 3 hours, you have an average of 90 seconds per question. That pace is workable for recall items but tight for lengthy scenario items, so plan to move quickly through straightforward questions and bank time for those that require reasoning.
Official preparation material is available: ACAC publishes the Council-certified Fire and Smoke Damage (CFSx) Certification Program Exam Study/Review Guide (Rev. 12-2024). No training course is mandatory, so how you prepare is up to you, but anchoring your study to the official domains and the ACAC review guide keeps you aligned with what the exam targets. Our one-page CFST cheat sheet is useful for last-pass review once you have worked through the fundamentals.
Reading the 66% Pass Ratio Correctly
ACAC's 2025 Exam Pass Ratio reports 66%, based on 10 passing out of 15 examinations. This is the issuer's printed figure, and it is easy to misread, so three cautions apply:
- It is not a first-attempt pass rate. The report includes retakes, so candidates who failed once and returned are counted again.
- It includes state-licensing-only examinations. Some candidates sit the exam for state licensing purposes rather than to earn the CFST designation.
- The sample is tiny. Fifteen examinations is far too few to treat 66% as a stable long-run probability. A swing of just one or two candidates would move the percentage noticeably.
The honest takeaway is that the exam is passable but not a formality, and that no one can quote a reliable first-attempt pass rate from this data. For more on interpreting the figure, read our analysis of the CFST pass rate data.
Key Takeaway
Do not let the 66% headline either scare or reassure you. Because it blends retakes and licensing-only sittings across just 15 exams, it says little about your individual odds. Your preparation against the 75% standard is what counts.
Scoring, Delivery and Exam-Day Mechanics
The exam is delivered through Kryterion, either by computer at a testing center or by online video proctoring. Electronic scores are available immediately, so you will know the outcome of the exam right away rather than waiting weeks.
For testing-center appointments, bring two government-issued IDs, including one photo ID. Checking that the names on your IDs match your registration is a simple step that prevents avoidable problems at check-in. Delivery policies are posted on ACAC's exam page, and you should review them before booking, especially if you choose remote proctoring.
- Confirm your delivery method (testing center versus online proctoring) when scheduling.
- Prepare identification in advance if testing in person.
- Expect an immediate electronic score report after you finish.
Scheduling windows and deadlines are covered in our guide to CFST exam dates and scheduling.
Passing the Exam Is Not the Same as Being Certified
This is the most commonly misunderstood point about the passing score. Hitting 75% clears the examination, but it does not by itself confer the CFST designation. Certification also depends on your application being approved, and ACAC requires unanimous board approval.
Eligibility rests on one of two paths: a qualifying science-related two-year degree (or a 15-credit equivalent) plus one year of documented fire and smoke investigation experience, or a high-school diploma/GED plus two years of such experience. Your application package includes four project sheets, applicable education transcripts and required email verifications.
Also note that passing the exam for state licensing alone does not give you the CFST credential. If your goal is the designation, you need the full application route. Our CFST requirements guide walks through qualification in detail.
If You Miss the Mark: Retake Economics
Falling short of 75% is not the end of the road. A retake costs $100. For context, the first two-year term costs $500 in the US and Canada (a $100 examination fee plus a $400 certification fee), or $525 outside the US/Canada. Renewal after the two-year term costs $400 and requires 40 recertification credits: 10 for attesting to continued field activity and 30 hours of professional development.
| Item | Fee (USD) |
|---|---|
| Examination fee | $100 |
| Certification fee | $400 |
| First two-year term total (US/Canada) | $500 |
| First two-year term total (outside US/Canada) | $525 |
| Retake | $100 |
| Renewal (every two years) | $400 |
Because a retake costs a fraction of the full certification fee, the financial penalty for a first-attempt miss is modest, but the time and momentum cost is real. If you do retake, use the score feedback to focus on the domains where you felt least confident. For the full financial picture, see our CFST certification cost breakdown.
A Domain-Ordered Plan Built Around the 75% Line
Because the exam spans five connected domains with unpublished weights, an even, sequential approach works better than cramming a favorite topic. The sequence below follows the investigative workflow so each week builds on the last. Adjust the timeline to your experience level and the date you have booked.
Domain 1: General Knowledge
- Build the vocabulary and core concepts every later domain assumes
- Skim the ACAC CFSx study/review guide to see how topics are framed
Domain 2: Site Characterization
- Practice reasoning from site conditions to likely investigative questions
- Link what you observe to what you would need to sample
Domain 3: Sample Collection
- Drill procedures where precise details decide the correct answer
- Review common ways collection errors undermine later results
Domain 4: Sample Analysis, Data Interpretation & Report Writing
- Work through data-to-conclusion reasoning and report-content questions
- Spend extra time here if interpretation is not part of your daily work
Domain 5: Remediation, then full review
- Connect remediation decisions back to earlier findings
- Take timed practice sets of 120 questions to rehearse the 3-hour pace
Since the real exam is closed book, rehearse under the same constraint. Our CFST practice tests let you simulate the multiple-choice format, and a timed full-length run is the best way to find out whether you are consistently clearing 75%. When you are ready to measure yourself, start with a free practice exam and review every miss against the domain it came from. For a broader preparation framework, revisit the CFST study guide.
Key Takeaway
Aim to score comfortably above 75% on timed practice sets before test day, not merely at it. A buffer of several points protects you against unfamiliar wording and the natural variation between exams.
Candidates weighing whether the effort pays off may also want to read about CFST earnings and the return on investment of the certification before committing.
Frequently Asked Questions
The passing score is 75%, set by ACAC using the modified Angoff method. The exam has 120 multiple-choice questions and a 3-hour time limit, and it is closed book.
If all 120 questions count equally, 75% corresponds to 90 correct answers, which makes a sensible target. ACAC publishes the percentage threshold rather than a detailed raw-score conversion, so aim comfortably above 90 in practice.
Scores are delivered electronically and are available immediately after you finish. The exam is administered by Kryterion, either at a testing center or by online video proctoring.
No. Passing clears the examination, but the designation also requires an approved application with project sheets, transcripts and email verifications, plus unanimous board approval. Passing for state licensing alone does not confer the CFST designation.
You can retake the exam for $100. Use your result to identify weaker domains and rehearse with timed practice before rescheduling. ACAC's 2025 pass ratio of 66% (10 of 15 examinations) includes retakes and state-licensing-only exams, so it is not a first-attempt pass rate.
Reaching 75% is a matter of steady, domain-by-domain competence rather than last-minute memorization. Learn the workflow from general knowledge through remediation, rehearse the closed-book, 120-question format, and confirm the current application rules with ACAC before you begin. For quick background on the credential itself, see what CFST certification is and what it can lead to in CFST career paths.