- What Is AZ-B1 Certification, Exactly?
- Who Governs and Administers the Exam
- Exam Format, Fees, and Mechanics
- The 10 AZ-B1 Exam Domains
- Open-Book References You're Allowed to Use
- Eligibility and Licensing Requirements
- The NASCLA Exam Alternative
- Cost and Timeline After You Pass
- Who Actually Needs This License
- How to Sequence Your Study Time
- Frequently Asked Questions
- AZ-B1 is the Arizona Registrar of Contractors' trade exam for General Commercial licensing, delivered by PSI.
- The exam has 100 scored questions, a 4-hour limit, and requires a 70% passing score.
- Concrete (14%) and Metals (13%) are the two heaviest-weighted domains out of 10 total.
- You may bring OSHA 29 CFR 1926, the 2018 IBC, and the 2018 IRC into the open-book test session.
What Is AZ-B1 Certification, Exactly?
AZ-B1 refers to the Arizona B-1 General Commercial Contractor Trade Examination - the licensing exam a qualifying party must pass to hold a B-1 license issued by the Arizona Registrar of Contractors (ROC). It is not a private industry credential or a national safety certificate; it is a state-controlled trade competency exam tied directly to legal authorization to bid and perform general commercial construction work in Arizona.
The exam is combined with related classifications - B-2, KB-1, and KB-2 - meaning the same trade content pool supports several closely related license types, but this article focuses specifically on what B-1 candidates need to know. If you're still getting oriented, the companion piece What Is AZ-B1? and the plain-language breakdown at AZ-B1 Meaning cover the terminology from a different angle.
Who Governs and Administers the Exam
Two organizations split the responsibilities. The Arizona Registrar of Contractors sets licensing policy, reviews applications, and issues the actual B-1 license. PSI, a third-party testing vendor, builds and delivers the trade exam itself under a candidate bulletin the ROC references. The bulletin currently in effect is dated February 18, 2026, and the B-1 content outline behind it has been effective since May 9, 2024.
This split matters practically: exam scheduling, test-day rules, and score reporting are PSI's domain, while experience verification, bonding, background checks, and the license itself are the ROC's domain. Confusing the two is a common source of applicant delays - see AZ-B1 Requirements 2026: Eligibility, Prerequisites & How to Qualify for how the pieces connect.
Exam Format, Fees, and Mechanics
The B-1 trade exam is open-book, computer-delivered, and multiple-choice. Here's what candidates actually sit down to on test day:
- 100 scored questions, plus PSI may insert 5 to 10 additional unscored experimental questions you can't distinguish from scored ones.
- 4-hour time limit to complete the exam.
- 70% passing score required.
- $66 trade-exam fee, paid separately from ROC application fees.
- Choice of test-center or remote-proctored delivery through PSI.
Because this is a multiple-choice, code-reference exam rather than a hands-on skills demonstration, success depends heavily on knowing where information lives in your approved references and how quickly you can locate it under time pressure - not just memorization. For a deeper look at how difficult that combination actually is in practice, read How Hard Is the AZ-B1 Exam? Complete Difficulty Guide 2026.
Key Takeaway
With 100 scored questions and a 4-hour window, you have roughly 2.4 minutes per question if you use the entire block evenly - but code lookups eat time unevenly across domains, so budget more minutes for Concrete and General Building Code questions than for shorter recall items.
The 10 AZ-B1 Exam Domains
The B-1 content outline organizes every scored question into one of ten domains. Two domains - Concrete and Metals - carry the heaviest published weights, at 14% and 13% respectively, which together account for over a quarter of the entire exam.
Domain 2: Concrete (14% - largest domain)
Covers formwork, reinforcement placement, mix and placement practices, curing, and finishing as applied to commercial structures.
- Expect questions referencing IBC provisions on concrete construction and inspection points.
Domain 4: Metals (13%)
Covers structural steel, connections, fasteners, and metal framing systems used in commercial building.
- Cross-reference IBC structural chapters when a question hinges on code compliance rather than pure trade practice.
The remaining eight domains - Sitework, Masonry, Carpentry, Thermal and Moisture Protection, Doors and Windows, Finishes, Safety, and General Building Code - round out the outline at smaller individual weights, but collectively they still make up the majority of scored questions. Safety questions typically draw on OSHA 29 CFR 1926, while General Building Code questions pull from the 2018 IBC and 2018 IRC. For a domain-by-domain breakdown with study priorities for each, see AZ-B1 Exam Domains 2026: Complete Guide to All 10 Content Areas.
| Domain | Focus Area |
|---|---|
| 1. Sitework | Excavation, grading, site prep |
| 2. Concrete | Formwork, reinforcement, placement (14%) |
| 3. Masonry | Block, brick, mortar systems |
| 4. Metals | Structural steel, framing, fasteners (13%) |
| 5. Carpentry | Framing, rough and finish carpentry |
| 6. Thermal and Moisture Protection | Insulation, waterproofing, roofing |
| 7. Doors and Windows | Installation, hardware, code clearances |
| 8. Finishes | Interior/exterior finish materials |
| 9. Safety | OSHA 29 CFR 1926 jobsite requirements |
| 10. General Building Code | 2018 IBC / 2018 IRC application |
Open-Book References You're Allowed to Use
Unlike closed-book state exams, AZ-B1 permits you to bring specific published references into the test session:
- OSHA 29 CFR Part 1926 - the construction safety standard
- 2018 International Building Code (IBC)
- 2018 International Residential Code (IRC)
A basic silent, nonprinting, nonprogrammable calculator is also permitted at test centers. The open-book format doesn't make the exam easy - it makes speed and navigation the real skill. Candidates who haven't practiced flipping to the right chapter and section under a clock routinely run out of time even though they "know" the material. This is exactly the kind of navigation practice covered in AZ-B1 Study Guide 2026: How to Pass on Your First Attempt.
Eligibility and Licensing Requirements
Before you can even sit for the trade exam as a qualifying party, Arizona expects documented trade background:
- Generally four years of practical or management trade experience.
- At least two of those years within the preceding ten years.
- Approved technical education can substitute for up to two years of that experience requirement.
Beyond the trade exam, applicants must also complete the Arizona Statutes and Rules Training Course and Exam, pass a background check, secure a bond, and complete the ROC application itself. None of these steps are optional add-ons - they're all part of the same licensing pathway. The full sequence, including which steps can run in parallel, is laid out in AZ-B1 Requirements 2026: Eligibility, Prerequisites & How to Qualify.
The NASCLA Exam Alternative
Arizona allows B-1 applicants to substitute the NASCLA Accredited Commercial General Building exam in place of the state's own trade exam. This matters most for contractors who already hold or are pursuing licenses in multiple states, since a single NASCLA credential can satisfy trade-exam requirements across several jurisdictions instead of retaking a separate exam in each state. If you're only ever planning to work in Arizona, sitting the PSI-administered B-1 exam directly is usually the more straightforward path, and it's the one this site's practice materials on the main practice test platform are built around.
Cost and Timeline After You Pass
The $66 trade-exam fee is only one line item in the total cost of becoming licensed. General Commercial application and initial license fees total $780, and license renewal - required every two years - runs $580. Passing the exam is a milestone, not the finish line; bonding, background checks, and the application itself still lie ahead.
For candidates budgeting the entire process from first study session to active license, AZ-B1 Certification Cost 2026: Complete Pricing Breakdown itemizes every fee in sequence so nothing catches you off guard mid-application.
Key Takeaway
Treat the $66 exam fee as the smallest number in your budget - the $780 application/initial license total and the $580 renewal are the figures that actually determine long-term cost of holding a B-1 license.
Who Actually Needs This License
The B-1 license authorizes general commercial construction work - the qualifying party role typically sits with a company owner, project executive, or senior superintendent who takes legal responsibility for a firm's commercial projects. Commercial general contracting firms, design-build outfits, and specialty contractors expanding into general commercial scope are the typical employers or beneficiaries of someone holding this license. Subcontractors bidding as prime contractors on commercial jobs, and construction managers stepping into ownership or qualifying-party roles, are also common candidates.
Because the license attaches to a person acting as qualifying party for a business entity, it's less about entry-level hiring and more about who within an organization is legally permitted to hold and use the license. If you're evaluating whether pursuing it fits your career path, AZ-B1 Jobs and Is the AZ-B1 Certification Worth It? Complete ROI Analysis 2026 look at the practical career angle in more depth, and AZ-B1 Salary Guide 2026: Complete Earnings Analysis covers earnings considerations for licensed contractors.
How to Sequence Your Study Time
Given that Concrete and Metals together account for 27% of the exam's weight, and General Building Code and Safety questions touch nearly every other domain through code cross-references, a sensible study order front-loads the heaviest and most cross-cutting material first rather than working through the outline in numerical order.
Concrete and Metals
- Work through Domain 2 and Domain 4 material since they're the two highest-weighted domains
- Practice locating relevant IBC sections quickly, since both domains lean on code cross-references
Safety and General Building Code
- Study OSHA 29 CFR 1926 structure so you can navigate it fast during the open-book exam
- Review 2018 IBC and 2018 IRC organization - these two domains reinforce almost every other domain
Remaining Trade Domains
- Cover Sitework, Masonry, Carpentry, Thermal and Moisture Protection, Doors and Windows, and Finishes
- Take timed practice sets to simulate the 4-hour, 100-question format
Whatever pace you choose, run full-length timed practice on our practice test platform before test day so the 4-hour pacing and open-book lookups feel routine rather than novel. For a condensed reference to keep nearby during final review, see AZ-B1 Cheat Sheet 2026: One-Page Review of Must-Know Facts, and for scoring specifics, AZ-B1 Passing Score 2026: Exactly What You Need to Pass explains exactly what 70% means in raw question terms.
Frequently Asked Questions
Not exactly. AZ-B1 is the trade exam required as one step toward earning the B-1 General Commercial Contractor license issued by the Arizona Registrar of Contractors. Passing the exam is a prerequisite, not the license itself.
The exam has 100 scored questions (plus possibly 5-10 unscored experimental questions), delivered over a 4-hour time limit. You need a 70% passing score.
The exam is open-book but limited to approved references: OSHA 29 CFR Part 1926, the 2018 International Building Code, and the 2018 International Residential Code, along with a basic silent, nonprinting, nonprogrammable calculator.
Exam results must be used for the license application within two years of passing. If that window lapses, you would need to retake the trade exam before applying.
Arizona allows B-1 applicants to use the NASCLA Accredited Commercial General Building exam in place of the Arizona trade exam, which can be useful for contractors licensed in multiple states.