- AZ-B2 is the Arizona ROC's General Small Commercial Contractor license, capped at $2,000,000 in labor and materials per project.
- The PSI trade exam has 100 scored questions, 240 minutes, and a 70% passing standard.
- Electrical, plumbing, fire protection, HVAC, boiler, pool/spa, and water-well work must be subcontracted out.
- Concrete (14 items) and Metals (13 items) are the two heaviest of the 10 content areas.
What Is the AZ-B2 Trade Exam?
AZ-B2 refers to the Arizona B-2 General Small Commercial Contractor trade examination, one of the licensing exams administered by PSI on behalf of the Arizona Registrar of Contractors (ROC). It is not a residential credential - that distinction matters because Arizona also issues a separate general residential classification, and confusing the two leads applicants toward the wrong exam blueprint entirely. The "B-2" designation specifically covers small commercial construction, and this site, azb2exam.com, focuses exclusively on that classification.
The underlying trade-examination content outline used for B-2 is shared across four related classifications - B-1, B-2, KB-1, and KB-2 - meaning the technical questions on sitework, concrete, masonry, and the other content areas are drawn from the same pool regardless of which of those four licenses you're pursuing. NASCLA offers an alternative national trade-exam pathway some contractors use instead, but that is a different route from the PSI-administered outline covered on this site.
For a broader breakdown of exactly what the letters stand for and how they differ from similarly-named credentials elsewhere, see AZ-B2 Meaning and What Does AZ-B2 Stand For?. If you want the certification-level overview rather than just the exam, AZ-B2 Certification covers the licensing side in more depth.
Who Actually Needs the AZ-B2
The B-2 license is built for contractors who want to legally bid, contract, and manage smaller commercial construction jobs in Arizona without needing an unlimited commercial ticket. Typical candidates include:
- Superintendents or project managers moving into a qualifying-party role for a small commercial contracting company
- General contractors who currently hold a residential license and want to add commercial capacity within the $2,000,000 project cap
- Owners starting a new commercial construction or remodeling business who need someone on staff to pass the trade exam and qualify the entity
Because electrical, plumbing, fire protection, air conditioning, boiler, swimming pool, spa, and water-well work all must be subcontracted to appropriately licensed specialty contractors, the B-2 exam itself does not test those trades in depth. It tests the structural, envelope, and code knowledge a general commercial contractor is responsible for coordinating directly. That's a meaningful distinction if you're deciding whether B-2 is the right classification - see AZ-B2 Requirements for the full eligibility picture, including the experience rules discussed below.
What B-2 Licenses Let You Build
The B-2 classification is intentionally scoped smaller than an unlimited commercial license. It qualifies new commercial structures and additions where total labor and materials come in at or under $2,000,000. That threshold applies per project, so a B-2 qualifying party can run multiple jobs simultaneously as long as each one individually stays within the cap.
What Stays In-House vs. What Gets Subcontracted
Understanding this split is fundamental to passing the exam and to running a compliant jobsite.
- Typically managed directly: sitework, concrete, masonry, structural metals, carpentry, thermal/moisture protection, doors/windows, finishes
- Must be subcontracted: electrical, plumbing, fire protection, air conditioning, boiler systems, swimming pools/spas, water wells
Exam Format and Question Style
The AZ-B2 trade exam is computer-based and multiple-choice, and it's offered either at a physical PSI test center or through remote proctoring. The scored outline consists of 100 questions with a 240-minute time limit and a 70% passing standard. PSI may also insert 5 to 10 unscored experimental questions within that same testing window - these don't count toward your score, but you won't know which ones they are, so every question deserves full attention regardless.
Key Takeaway
Plan your pacing around roughly 100 scored items in 240 minutes, but budget mentally for up to 110 total questions on screen since experimental items are mixed in unlabeled.
If you choose remote proctoring, be aware of two restrictions that surprise candidates who've tested remotely before for other exams: physical scratch paper is not allowed, and breaks are not permitted during a remote session. A basic calculator is permitted in either testing format, but it must be silent, nonprinting, non-programmable, and non-scientific - a simple four-function calculator is the safe choice. For a deeper look at exactly how the scoring threshold works and what it means for how many questions you can miss, read AZ-B2 Passing Score.
The 10 Content Areas
The AZ-B2 outline breaks down into 10 subject areas, each with a fixed number of scored items. Knowing this breakdown lets you weight your study time proportionally instead of spreading effort evenly across topics that aren't evenly tested.
| Content Area | Item Count |
|---|---|
| Concrete | 14 |
| Metals | 13 |
| Carpentry | 12 |
| Safety | 12 |
| Masonry | 10 |
| Thermal and Moisture Protection | 10 |
| Sitework | 9 |
| General Building Code | 9 |
| Finishes | 6 |
| Doors and Windows | 5 |
Concrete is the single largest content area, followed closely by Metals - together these two topics account for more than a quarter of the entire scored exam. Carpentry and Safety tie for third weight. A candidate who masters Concrete, Metals, Carpentry, and Safety alone has meaningfully de-risked the exam before even touching the smaller domains like Doors and Windows or Finishes.
Domain 1: Sitework (9 items)
Covers earthwork, excavation, grading, and site preparation concepts a general contractor coordinates before vertical construction begins.
Domain 2: Concrete (14 items)
The heaviest-weighted content area. Expect questions on formwork, reinforcement, mix considerations, and placement/curing practices relevant to small commercial structures.
Domain 4: Metals (13 items)
The second-largest area. Structural and miscellaneous metals questions test understanding of connections, framing members, and code-driven specifications.
Domain 9: Safety (12 items)
Jobsite safety questions draw heavily on OSHA 29 CFR Part 1926, which is also one of the permitted open-book references during the exam itself.
For candidate-friendly explanations of every single content area with example concepts, the dedicated breakdown at AZ-B2 Exam Domains 2026: Complete Guide to All 10 Content Areas goes further than a summary table can. And if you're still trying to gauge how tough this exam actually feels in practice, How Hard Is the AZ-B2 Exam? walks through difficulty factors domain by domain.
Fees, Registration, and Retakes
Two separate costs apply to becoming licensed under B-2, and candidates frequently conflate them:
- PSI trade examination: $66 per attempt - this is the 100-question Sitework-through-Building-Code exam covered on this page
- ROC Statutes and Rules Exam (SRE): $61 - a separate online exam/course covering Arizona contracting law and ROC rules, required in addition to the trade exam
If you fail the trade exam, Arizona requires a 30-day wait before retesting. That wait extends to 90 days starting on your fourth and any subsequent attempt, so it pays to prepare thoroughly rather than treat early attempts as practice runs. A full cost breakdown, including how these fees fit into the total licensing budget, is available at AZ-B2 Certification Cost 2026: Complete Pricing Breakdown.
Open-Book References Allowed
Unlike many trade exams, AZ-B2 permits a restricted set of open-book references directly in the testing room:
- 2018 International Building Code (IBC)
- 2018 International Residential Code (IRC)
- OSHA 29 CFR Part 1926
Other study-only materials you might use to prepare are not permitted in the exam room. Pre-existing highlighting, underlining, annotations, and permanent tabs already in your reference books are allowed under this outline, but you cannot bring in loose or attached papers, and you cannot write in your books during the actual test session. If you're testing remotely, remember that scratch paper is banned entirely - plan how you'll navigate your references without jotting notes on the side.
Key Takeaway
Tab and highlight your IBC 2018, IRC 2018, and OSHA 1926 copies well before test day - index them by content area (Concrete, Metals, Safety) so you can find sections quickly under the 240-minute clock.
The Path From Zero to Licensed
Passing the trade exam is one piece of a larger licensing sequence set by the ROC. The general framework looks like this:
- Confirm you (or your designated qualifying party) meet the experience requirement - ordinarily four years of relevant practical or management experience, with at least two years within the preceding ten. Approved technical training or education can offset up to two years of that requirement.
- Pass the AZ-B2 trade exam through PSI ($66 per attempt).
- Complete the ROC Statutes and Rules Exam/course ($61).
- Submit the license application within two years of passing the trade exam.
- Secure the required contractor bond, confirm business-entity standing, pass background checks, and arrange legally required workers' compensation coverage.
Once licensed, B-2 contractors renew biennially, which means submitting a renewal application, paying the applicable fee, and keeping a valid bond in place. None of this is exam content per se, but it shapes when you should schedule your test relative to your broader application timeline. The full eligibility checklist - including how experience credit and technical training combine - is detailed in AZ-B2 Requirements 2026.
How to Prepare Without Wasting Time
Because the content weighting is fixed and published, the most efficient prep plan mirrors the item counts rather than treating all 10 areas equally.
Concrete and Metals
- These two areas alone represent 27 of the 100 scored questions - start here so the heaviest lift happens while your energy is highest.
Carpentry and Safety
- Cross-reference Safety questions directly against OSHA 29 CFR 1926 since it's also your open-book reference on exam day.
Masonry, Thermal/Moisture Protection, Sitework, General Building Code
- Four mid-weight areas that together still make up 38 questions - don't skip these for the smaller domains.
Doors/Windows, Finishes, and full timed run-throughs
- Finish the lightest domains, then simulate the full 240-minute, 100-question format with your actual reference books tabbed.
Run practice sessions on our practice test platform to get comfortable with the multiple-choice question style and pacing before test day - repetition under realistic time pressure matters more than passive reading once you know the content. A more detailed week-by-week methodology, including how to sequence review sessions and mock exams, is in AZ-B2 Study Guide 2026: How to Pass on Your First Attempt.
If you're still deciding whether pursuing this license fits your career plans, Is the AZ-B2 Certification Worth It? and AZ-B2 Salary Guide 2026 look at the broader return-on-investment question, while AZ-B2 Jobs covers the kinds of roles that call for this classification specifically.
Frequently Asked Questions
The B-1 and B-2 classifications share the same underlying PSI trade-examination content outline, along with KB-1 and KB-2. The classifications differ in project type and scope, but the tested subject areas - Sitework, Concrete, Masonry, and the rest - come from the same blueprint.
Not in depth. Electrical, plumbing, fire protection, air conditioning, boiler, swimming pool/spa, and water-well work must be subcontracted to specialty license holders, so the B-2 outline focuses on the structural, envelope, and general building code areas a general commercial contractor manages directly.
The scored outline contains 100 questions across 10 content areas, with a 240-minute time limit and a 70% passing standard. PSI may add 5-10 unscored experimental questions within the same time window, so you could see slightly more than 100 items on screen.
Only the 2018 IBC, 2018 IRC, and OSHA 29 CFR Part 1926 are permitted as open-book references. Pre-existing highlighting, underlining, and permanent tabs in those books are allowed, but loose papers, additional books, and writing in your references during the test are not permitted.
You must wait 30 days before retesting for your second and third attempts. Starting with your fourth attempt, the required wait increases to 90 days. Each attempt costs $66 through PSI.