ATT2 Requirements 2026: Eligibility, Prerequisites & How to Qualify

The ATT2 Prerequisite: ACI Level 1 First

Before you even think about scheduling an ATT2 exam, there's a hard gate you cannot skip: you must hold a current ACI Aggregate Testing Technician - Level 1 certification. This isn't a "recommended background" or a soft suggestion - it's a stated requirement under ACI's certification policy. If your Level 1 credential has lapsed, you'll need to renew or requalify it before a sponsoring group will let you register for Level 2.

This prerequisite exists because ATT2 builds directly on Level 1 foundations - sampling, basic gradation, and fundamental aggregate properties - before layering on the more specialized standards covered at Level 2. If you're still fuzzy on what the credential actually represents at a conceptual level, start with What Is ATT2? or the shorter primer at ATT2 Meaning before diving into logistics.

Full Eligibility Checklist for 2026

Beyond the Level 1 prerequisite, eligibility for ATT2 comes down to a short but non-negotiable list. Use this as your pre-registration checklist:

• Current ACI Level 1 certification - verified by your sponsoring group at registration.
• Enrollment through an ACI-approved sponsoring group - you cannot self-administer or take the exam independently; certification is delivered through approved sponsors and examiners.
• Access to ACI-approved references for the open-book written portion (more on this below).
• Willingness/ability to physically perform or verbally describe test procedures for the performance exam - this is a hands-on component, not just a knowledge check.
• A nonprogrammable, simple-function pocket calculator if you plan to use one during testing.

There's no university degree requirement, no minimum years of field experience specified beyond holding Level 1, and no citizenship or geographic restriction described in ACI's certification policy (CPP 620.3-20). The barrier to entry is procedural knowledge and the Level 1 credential, not a resume threshold.

How the Two-Part Exam Actually Works

ATT2 certification is earned through two separate examination components, and understanding their format matters just as much as understanding eligibility - because the format dictates how you should prepare.

The Written Examination

The written exam is open-book, but only ACI-approved references are permitted at the table. It runs two hours and contains approximately 100 multiple-choice questions, distributed across the ten standards at roughly eight to 12 questions per standard. That distribution matters: no single standard dominates the exam, but none is a throwaway either. You need working familiarity with all ten areas, not just the ones that feel intuitive.

Scoring has two thresholds, and both apply simultaneously:

• At least 60% on every individual standard - you can't "average out" a weak domain with strength elsewhere.
• At least 70% overall across the full written exam.

For a full breakdown of exactly what these thresholds mean in practice, see ATT2 Passing Score 2026: Exactly What You Need to Pass.

The Performance Examination

The second component is a closed-book performance exam. Here you demonstrate - or, where permitted, verbally describe - the prescribed procedural steps for applicable standards. This is where "I know the theory" gets tested against "I can actually execute or narrate the method correctly, in the right sequence, under observation."

If you're trying to gauge how demanding this combination really is compared to other technical certifications, How Hard Is the ATT2 Exam? Complete Difficulty Guide 2026 walks through the difficulty profile in more depth, and ATT2 Pass Rate 2026: What the Data Shows covers what's publicly known about outcomes.

The Ten Standards You Must Know Cold

ATT2's content is organized around ACI's Job-Task Analysis (approved September 30, 2024), which defines ten study domains - each tied to a specific AASHTO or ASTM standard. Three are written-exam-only; seven carry both written and performance weight.

For a deeper walkthrough of each domain with worked examples and terminology, see the companion resource ATT2 Exam Domains 2026: Complete Guide to All 10 Content Areas. If you want a condensed reference to keep at your desk during final review, the ATT2 Cheat Sheet 2026: One-Page Review of Must-Know Facts distills the highest-yield facts from all ten domains.

Registration, Sponsoring Groups & Fees

ATT2 is not administered as a single centrally-priced national exam - it's delivered through ACI-approved sponsoring groups, and those groups set their own local pricing and logistics. That means "how much does ATT2 cost" doesn't have one universal answer; it depends entirely on which sponsoring group you register through.

Notice how differently these two packages are structured - one bundles review and materials, the other charges separately and adds a processing fee. Always read the fine print for your specific sponsoring group before budgeting. For a full cost breakdown, including the standalone CP-45 workbook pricing (USD 133 regular, USD 69 for ACI members), see ATT2 Certification Cost 2026: Complete Pricing Breakdown.

To find scheduling windows and deadlines relevant to your chosen sponsoring group, check ATT2 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

Mapping Your One-Year Qualification Window

Here's a structural detail that trips people up: both the written and performance components must be passed within one year of each other. If you pass the written exam but fail the performance exam, the passed written score remains usable for a year while you retake the performance portion. But if you fail a component, you retake that component in full - there's no partial credit or item banking within a single sitting.

This has a direct planning implication. If your sponsoring group offers the written and performance exams on separate dates, don't let a long gap creep in. Treat the one-year window as your outer boundary, not your target timeline.

This kind of sequencing - separating written-only standards from dual-tested ones - is far more useful for ATT2 than generic study advice, because it directly reflects how the exam is structured. For a complete week-by-week study plan built around this same logic, see ATT2 Study Guide 2026: How to Pass on Your First Attempt.

Required Materials and What's Allowed in the Room

Because the written exam is open-book, knowing what you're allowed to bring matters as much as knowing the content. Only ACI-approved references are permitted - not general internet printouts or personal notes beyond what your sponsoring group authorizes. The core study resource is ACI's own preparation workbook, CP-45, seventh edition, which aligns directly with the ten standards tested.

A calculator is allowed, but with a specific restriction: it must be a simple-function, nonprogrammable pocket calculator. Graphing calculators, programmable models, or phone calculator apps are not appropriate substitutes - confirm with your sponsoring group exactly which models are acceptable before exam day.

The performance exam, being closed-book, requires no reference materials at all - just your ability to execute or accurately describe each procedure's steps in the correct order.

Staying Qualified: Five-Year Recertification

ATT2 certification is valid for five years. When it comes time to recertify, there's no shortcut or "grandfathering" - you must pass both the written and performance examinations again, under whatever current version of the standards and Job-Task Analysis is in effect at that time. Since ACI periodically updates its JTA (the current one was approved September 30, 2024), expect the specific emphasis or question distribution to potentially shift by your renewal date.

This is worth factoring into your career planning now, not just your initial exam prep. If you're weighing whether the credential is worth pursuing given this recurring commitment, Is the ATT2 Certification Worth It? Complete ROI Analysis 2026 and ATT2 Salary Guide 2026: Complete Earnings Analysis cover the long-term value proposition. Employers who hire aggregate testing technicians - materials testing labs, DOT-adjacent contractors, and quality control departments at aggregate and concrete producers - generally look for active, non-lapsed certification, so treat the five-year clock as a standing item on your professional calendar.

Looking for where these credentials actually lead? ATT2 Jobs covers the kinds of roles that request this certification specifically.

Ready to test your domain-by-domain readiness against realistic multiple-choice items? You can start practicing on the main practice test platform to see where your ten-standard knowledge actually stands before you commit to a sponsoring group's fee.

Frequently Asked Questions