What Is CAST?

What Is CAST?

CAST stands for Certified Alarm Security Technician, a credential administered by ETA International for professionals who install, program, and service alarm and life-safety systems. If you've seen the acronym "CAST" attached to a completely different field, ignore it - this article is exclusively about the alarm/security technician credential, and every fact below comes directly from ETA International's published program materials.

The base CAST credential is the standalone version of the certification. It does not include the additional CAST(C) commercial competencies, which is a separate, more advanced track for technicians working on commercial-grade systems. If you're researching the acronym itself before diving into study materials, our companion pieces on CAST meaning, what CAST stands for, and what a CAST credential actually is break down the terminology in more depth.

Who Hires CAST-Certified Technicians

CAST is designed for people already working, or looking to work, in residential and light-commercial alarm and security installation. That includes technicians employed by security integrators, alarm monitoring companies, low-voltage contractors, and independent installation shops that need a documented, third-party-verified skill baseline for their staff. Because the exam is knowledge-based rather than a full apprenticeship, employers often treat it as a credential that confirms a technician understands system theory, wiring practices, and troubleshooting logic - not as a replacement for supervised field experience.

If you're weighing whether pursuing this credential makes sense for your career path, see our breakdown in Is the CAST Certification Worth It? and the field-specific overview in CAST Jobs, which looks at where this credential tends to open doors.

Exam Format and Registration Mechanics

The CAST exam is a proctored written test administered through an ETA Certification Administrator. You can sit for it using Trapeza online testing, on paper at an approved test site, or remotely through ExamRoom.AI if an in-person site isn't convenient.

• Question count: 75 questions
• Time limit: Two hours
• Passing score: 75%
• Format: Written knowledge exam only - no hands-on/practical component
• Base exam fee: $80
• Remote proctoring add-on: $16 for the two-hour ExamRoom.AI session
• Materials allowed: No reference sheets or formula sheets; calculator use follows standard ETA rules

One detail worth planning around: ETA provides one free retake within a year of your first attempt if you don't pass on the first try. Remote-proctoring charges for that retake are billed separately if you choose that testing method again. For a full line-item breakdown of what you'll actually pay start to finish, see CAST Certification Cost 2026: Complete Pricing Breakdown.

For the exact score threshold and how it's calculated against the 75-question format, read CAST Passing Score 2026: Exactly What You Need to Pass. And if you need to lock down testing windows or plan around your work schedule, CAST Exam Dates 2026: Testing Windows, Deadlines & Scheduling walks through scheduling logistics.

The 13 CAST Domains

The current CAST competency document lists 13 base sections that define what's testable on exam day. Unlike some certifications that publish weighted percentages per domain, CAST's public competency document doesn't break the 75 questions into fixed per-domain percentages - so it's safer to treat all 13 areas as fair game rather than betting heavily on a handful of topics.

The remaining eight domains - Interfacing, Locks, Block Diagrams and Schematics, Troubleshooting, Computers and Digital Concepts, Hand Tools/Soldering, Data Communications and Software, and Mathematics - round out the rest of the exam. Each one reflects a distinct, practical skill area rather than overlapping theory. For a full walkthrough of all 13 areas with study priorities for each, see CAST Exam Domains 2026: Complete Guide to All 13 Content Areas.

CAST, CAST(C), and Journeyman Status

It's worth understanding how the standalone CAST credential fits into ETA's broader credentialing structure so you don't confuse it with related designations:

In other words, you don't need to already hold CETa or any other prerequisite credential to sit for the base CAST exam - it's genuinely a standalone entry point. Journeyman-level recognition is a separate track that layers on additional experience and credentialing over time. If you're unsure whether you meet the baseline expectations before registering, CAST Requirements 2026: Eligibility, Prerequisites & How to Qualify covers eligibility in detail.

Preparing for the CAST Exam

Because CAST has no hands-on component, preparation is really about closing knowledge gaps across all 13 domains rather than practicing physical installation skills for the test itself (though real field experience obviously helps you reason through scenario-style questions). A simple way to structure a multi-week study plan is to group domains by theme and dedicate focused blocks to each, rather than reviewing everything randomly.

Since calculators are allowed under ETA's rules but reference sheets are not, spend extra time drilling math problems without notes so the process is automatic on exam day. For a more detailed, structured approach - including how to sequence review sessions and what to prioritize if you're short on time - see CAST Study Guide 2026: How to Pass on Your First Attempt. If you want a candid read on how challenging candidates actually find the exam, How Hard Is the CAST Exam? Complete Difficulty Guide 2026 covers that in depth, and CAST Pass Rate 2026: What the Data Shows looks at outcome data.

Running timed practice questions on our practice test platform before exam day is one of the most direct ways to get comfortable with the 75-question, two-hour format, since it mirrors the actual time pressure you'll face. A quick reference like a CAST Cheat Sheet 2026: One-Page Review of Must-Know Facts can also help during final review, even though you won't have it in the exam room.

Keeping Your CAST Certification Current

CAST certification is valid for four years from the date you pass. To keep it active, ETA requires one of two paths:

• Continuing education: 10 hours annually, totaling 40 hours across the four-year term
• Employer/supervisor verification: Documented confirmation under ETA policy in lieu of formal CE hours

Maintenance fees are $25 per year, or you can pay $100 up front to cover the full four-year cycle. Budgeting for this ongoing cost alongside the initial $80 exam fee gives you a realistic picture of what holding this credential costs over time - something covered more fully in the cost breakdown linked above.

If you're comparing CAST to other credentials or trying to understand its place in the broader alarm/security certification landscape, CAST Certification and What Is CAST Certification? both offer additional context, as does What Does CAST Mean? if you're still confirming you're looking at the right credential. For hands-on skill building before you test, check out programs referenced in CAST Training, and use our practice exams to gauge readiness across all 13 domains before you pay the registration fee.

Frequently Asked Questions