- The exam is 120 multiple-choice questions in 3 hours, closed book, with a 75% passing score.
- First two-year term costs $500 in the US/Canada ($525 elsewhere); renewal is $400 plus 40 credits.
- Eligibility requires documented fire/smoke investigation experience plus either a science degree or two years of experience.
- Four project sheets and unanimous board approval are required, and no training course is mandatory.
The Exam at a Glance
The Council-certified Fire and Smoke Damage Technician (CFST) credential is issued by the American Council for Accredited Certification (ACAC). This cheat sheet condenses the facts you need before you apply, sit, or renew. For the long-form version of each topic, the CFST study guide walks through a complete preparation plan.
| Item | What to Know |
|---|---|
| Issuer | American Council for Accredited Certification (ACAC) |
| Format | 120 multiple-choice questions, at least four answer choices per item |
| Time limit | 3 hours |
| Reference materials | Closed-book written examination |
| Passing score | 75%, set using the modified Angoff method |
| Testing provider | Kryterion, at testing centers or by online video proctoring |
| Score reporting | Electronic scores available immediately |
| Credential validity | Two years |
Three hours for 120 questions works out to a pace of roughly 90 seconds per item, which leaves a little room for flagged questions. A 75% cut score means you can miss up to 30 questions and still reach the threshold. For the detail behind that cut, see what you need to pass.
The Five Domains in One Pass
ACAC's examination chart lists five domains, approved March 20, 2024. The retrieved chart and handbook publish no percentage weights, so any claim that one domain is "worth" a specific share of the exam is unsupported. Treat all five as testable, and read the complete domain guide for deeper coverage.
Domain 1: General Knowledge
The foundation layer: how fires behave, how combustion products form and deposit, and the vocabulary an investigator uses in the field and in reports.
- Combustion products and how different fuels leave different residues
- Building materials, contents, and how they respond to heat and smoke
- Terminology you will be expected to use precisely in written reports
Domain 2: Site Characterization
Assessing the loss site before sampling begins. Expect scenario questions about what to observe, document, and decide first.
- Documenting the extent and pattern of smoke and soot migration
- Identifying affected materials and areas and forming a sampling rationale
- Recognizing site conditions that affect safety and data quality
Domain 3: Sample Collection
Getting defensible samples. Questions here test method selection and the practical details that protect sample integrity.
- Choosing appropriate sampling approaches for the residue or surface in question
- Controlling for contamination and keeping documentation consistent
- Chain-of-custody thinking and sample handling
Domain 4: Sample Analysis, Data Interpretation & Report Writing
Turning lab results into conclusions. This domain rewards candidates who can read analytical output critically and communicate findings clearly.
- Understanding what an analytical result does and does not demonstrate
- Interpreting data against site observations rather than in isolation
- Structuring a report so conclusions are supported and traceable
Domain 5: Remediation
Deciding what should be cleaned, restored, or removed, and how to verify the result.
- Matching remediation approaches to the damage found during characterization
- Defining performance criteria and post-remediation verification
- Recognizing when conditions call for escalation or further investigation
Notice the workflow logic: characterize the site, collect samples, analyze and report, then remediate. Questions often follow that same chain, so understanding how one domain's output feeds the next is more useful than memorizing isolated facts.
Fees, Terms, and Renewal Math
| Cost Item | US/Canada | Outside US/Canada |
|---|---|---|
| Examination fee | $100 | Included in $525 total |
| Certification fee | $400 | Included in $525 total |
| First two-year term total | $500 | $525 |
| Retake | $100 | $100 |
| Renewal (every two years) | $400 | $400 |
The practical takeaway: a failed attempt costs you the $100 retake fee, not a repeat of the full certification fee. The full breakdown, including how fees interact with the application timeline, is in the CFST certification cost guide, and the official schedule lives at acac.org/fees.
Renewal requirements
- Fee: $400
- Credits: 40 recertification credits in total
- Composition: 10 credits for attesting to continued field activity, plus 30 hours of professional development
- Records: keep your documentation, because renewals can be audited
Start logging professional development hours the day you earn the credential. Reconstructing 30 hours of training records two years later is much harder than keeping a running file.
Who Qualifies to Apply
ACAC uses two eligibility pathways. Both require documented experience investigating fire and smoke damage.
| Pathway | Education | Experience |
|---|---|---|
| Degree-based | A qualifying science-related two-year degree, or its 15-credit equivalent | One year of documented fire/smoke investigation experience |
| Diploma-based | High-school diploma or GED | Two years of documented fire/smoke investigation experience |
No training course is mandatory. That said, plenty of candidates use a course as structured exam preparation; the CFST training overview explains the options. For a deeper eligibility walkthrough, see CFST requirements.
Application Details That Trip People Up
What you submit
- The Official CFST Application
- Four project sheets
- Applicable education transcripts
- Required email verifications
Certification requires unanimous board approval, so the project sheets matter as much as the exam score. Passing the exam alone is not the whole story.
Two documented conflicts to check before you apply
ACAC's published materials are not perfectly consistent, and you should confirm the current rule directly before relying on either version:
- Experience scope: The handbook's alternative activities (designing, conducting, or reporting investigations) are broader than the current application, which requires design and execution of investigations. If your experience is reporting-only, verify with ACAC before assuming it qualifies.
- Application deadline: Current instructions allow six months, including the examination, while the handbook states 90 days. Plan to the shorter window if you cannot get written confirmation of the longer one.
Key Takeaway
Where the handbook and the current application instructions disagree, follow the more restrictive reading until ACAC confirms otherwise. Applying with narrower experience or a longer timeline than the issuer accepts is the costliest mistake you can make.
Also note that passing the exam for state licensing purposes alone does not confer the CFST designation. Timelines for scheduling are covered in the exam dates and scheduling guide, and application instructions are at acac.org/fsapplication.
Test-Day Logistics
- Provider: Kryterion
- Delivery: Computer-based, either at a testing center or by online video proctoring
- Identification at a testing center: Two government-issued IDs, including one photo ID
- Results: Electronic scores are available immediately
- Policy reference: acac.org/exams
Because the exam is closed-book and timed at three hours, rehearse sitting for the full duration at least once before test day. If you choose online proctoring, check your workspace and equipment requirements with the provider ahead of time rather than on the morning of the exam.
What the Printed Pass Ratio Does and Does Not Say
ACAC's 2025 Exam Pass Ratio reports 66%, based on 10 passes out of 15 examinations. Two cautions apply:
- The report includes retakes and state-licensing-only examinations, so it is not a first-attempt pass rate.
- With only 15 examinations in the sample, one year's figure can swing widely and should not be read as a stable trend.
For a fuller discussion, see the pass rate analysis and the difficulty guide. The honest summary: the exam is a professional-level test taken by a small, experienced candidate pool, and preparation matters.
Where the Credential Gets Used
The CFST designation signals documented competence in investigating combustion-product damage, which is relevant wherever fire and smoke losses are assessed and resolved. That typically means:
- Restoration and remediation firms that need defensible assessment and verification work
- Independent consultants and industrial hygiene practices that write loss-site reports
- Insurance-related roles where fire and smoke damage claims require technical evaluation
Compensation varies widely by region, employer type, and experience, and no single figure should be treated as typical. For a qualitative view, see the salary guide, the CFST jobs overview, and the ROI analysis.
A Domain-Ordered Review Schedule
Because the domains follow the workflow of a real investigation, reviewing them in order helps each topic build on the last. ACAC also publishes a Council-certified Fire and Smoke Damage (CFSx) Certification Program Exam Study/Review Guide (Rev. 12-2024) at acac.org, which is a sensible primary source to anchor this plan.
General Knowledge
- Lock in combustion-product and material-response vocabulary first, since every later domain assumes it
Site Characterization and Sample Collection
- Study these together: what you observe on site drives what you sample
- Practice scenario questions on sampling rationale and contamination control
Sample Analysis, Data Interpretation & Report Writing
- Spend extra time here on reading results critically and tying them back to site findings
Remediation and Full Review
- Cover remediation criteria and verification, then take timed mixed-domain sets
- Use the CFST practice tests to simulate the 120-question, 3-hour format
Since no weights are published, do not skip a domain because it seems lighter. Use practice results to find your weak domain, then revisit it; the main practice test site is a convenient place to track that.
Quick Answers
The exam has 120 multiple-choice questions with at least four answer choices each, and you have 3 hours. It is a closed-book written examination delivered by Kryterion.
The passing score is 75%, set using the modified Angoff method. Electronic scores are available immediately after testing.
The first two-year term costs $500 in the US/Canada ($100 examination plus $400 certification) and $525 outside the US/Canada. A retake costs $100, and renewal costs $400 with 40 recertification credits.
No training course is mandatory. You do need to meet the experience and education requirements, submit four project sheets, and receive unanimous board approval.
Start with what CFST certification is and what CFST stands for, then use this cheat sheet as your quick-reference summary.