- Understanding "Pass Rate" for AZ-B1
- The 70% Passing Score, Explained
- Domain Weighting and Where Candidates Lose Points
- Question Format and Why It Affects Outcomes
- Open-Book References: Help or Hindrance
- Registration, Fees, and Retake Mechanics
- Who Actually Sits This Exam
- Building a Study Plan Around the Domains That Matter Most
- Frequently Asked Questions
- The AZ-B1 trade exam requires 70% correct on 100 scored questions to pass.
- PSI may slip in 5 to 10 unscored experimental questions that don't count against you.
- Concrete (14%) and Metals (13%) carry the heaviest domain weight - study time should reflect that.
- You get 4 hours, open-book, with OSHA 29 CFR 1926, the 2018 IBC, and 2018 IRC as your only references.
Understanding "Pass Rate" for AZ-B1
Anyone searching for an AZ-B1 pass rate number is really asking a more useful question: "What separates candidates who pass from candidates who don't?" The Arizona Registrar of Contractors and PSI, the exam administrator, don't publish a public percentage breaking down how many applicants clear the B-1/B-2/KB-1/KB-2 trade exam on their first attempt. So rather than guessing at a figure, it's more productive to look at the mechanics that actually determine outcomes: the passing threshold, the domain weighting, the question format, and the references you're allowed to bring into the exam room.
Those four levers are documented in the current PSI candidate bulletin (dated February 18, 2026) and the B-1 content outline (effective May 9, 2024). Together they tell you far more about your realistic odds than any single percentage would. For a broader look at how tough the exam feels in practice, see How Hard Is the AZ-B1 Exam? Complete Difficulty Guide 2026.
The 70% Passing Score, Explained
The B-1 trade exam is computer-delivered, open-book, and multiple-choice, with 100 scored questions and a 4-hour time limit. To pass, you need to answer 70% of those scored questions correctly. That's the entire scoring rule - there's no minimum score per domain, and there's no partial credit weighting beyond the raw percentage of correct answers across the full 100-question set.
What complicates the picture slightly is that PSI may add 5 to 10 unscored experimental questions to your exam. These questions look identical to scored ones - same format, same difficulty range - but they don't count toward your 70% threshold. You won't know which ones are experimental, so the only sound strategy is to treat every question on screen as if it counts. For the exact mechanics of how this threshold is calculated and what it means practically, read AZ-B1 Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
Because 70% applies to the whole exam and not to individual domains, you can absorb some weakness in a smaller domain like Doors and Windows as long as you're strong in the high-weight domains like Concrete and Metals.
Domain Weighting and Where Candidates Lose Points
The B-1 content outline splits the exam into ten domains, and they are not weighted equally. Concrete sits at the top at 14%, with Metals close behind at 13%. That means roughly a quarter of your scored questions come from just those two domains combined. If your background is light on concrete formwork, reinforcement, or curing practices - or on structural steel and metal framing details - that's exactly where a marginal score turns into a failing one.
The full domain list is:
- Sitework
- Concrete
- Masonry
- Metals
- Carpentry
- Thermal and Moisture Protection
- Doors and Windows
- Finishes
- Safety
- General Building Code
For a domain-by-domain breakdown of what's tested inside each of these ten areas, see AZ-B1 Exam Domains 2026: Complete Guide to All 10 Content Areas.
Concrete (14% - largest domain)
Candidates need working knowledge of concrete placement, reinforcement, formwork, and finishing practices as they intersect with the 2018 International Building Code and 2018 International Residential Code.
- Highest-weighted single domain on the exam
- Cross-references heavily with General Building Code questions
Metals (13% - second largest domain)
Structural steel, metal framing, fasteners, and connections show up frequently, often blended with Safety-domain questions about handling and erection.
- Second-highest weighted domain
- Frequently paired with code-reference lookups during the exam
| Domain | Relative Weight | Study Priority |
|---|---|---|
| Concrete | 14% | Highest |
| Metals | 13% | Highest |
| Remaining 8 domains | Combined balance of the exam | Proportional to time available |
Because Concrete and Metals together account for a large share of scored questions, most candidates get the best return on their study hours by mastering those two domains first, then working through the remaining eight in whatever order matches their field experience gaps.
Question Format and Why It Affects Outcomes
Every question on the AZ-B1 trade exam is multiple-choice, delivered on a computer at a PSI test center or through remote proctoring. There's no essay, no fill-in-the-blank, and no simulation module - just 100 scored multiple-choice items pulled from the ten domains above, plus the possibility of a handful of unscored experimental items mixed in.
This format rewards candidates who can quickly identify the relevant code section or trade practice and eliminate distractor answers, rather than candidates who simply memorize isolated facts. Many multiple-choice items on trade exams like this one are written to test whether you can apply a code provision to a described job-site scenario, not whether you can recite the provision verbatim. That distinction matters when you're deciding how to study - recognition and application beat memorization.
Open-Book References: Help or Hindrance
The B-1 trade exam is open-book, but "open-book" doesn't mean "open internet." The only approved references at the test center are OSHA 29 CFR Part 1926, the 2018 International Building Code, and the 2018 International Residential Code. A basic silent, nonprinting, nonprogrammable calculator is also permitted.
Having these references available sounds like it should push outcomes higher across the board, but in practice it can cut both ways. Candidates who haven't practiced navigating the IBC and IRC index and table structure under time pressure often burn too many of their 4 hours flipping pages instead of answering questions. The open-book format helps most when you already know roughly where an answer lives and use the physical or digital reference to confirm a detail - not when you're using it to learn the material for the first time during the exam.
Key Takeaway
Practice locating specific sections in the 2018 IBC and 2018 IRC before exam day. Familiarity with the table of contents and index structure saves real minutes during the 4-hour window.
Registration, Fees, and Retake Mechanics
The trade-exam fee itself is $66, which is separate from the broader licensing costs. Total General Commercial application and initial license fees add up to $780, with a two-year renewal fee of $580 once you're licensed. A full breakdown of every fee in the process - including where the $66 exam fee fits relative to bonding, background checks, and the Arizona Statutes and Rules Training Course and Exam - is available in AZ-B1 Certification Cost 2026: Complete Pricing Breakdown.
One detail that directly affects your "pass rate" experience: passing results must be used for the license application within two years of the exam date. If you pass but delay finishing your application - background check, bond, statutes course, and the rest - past that two-year window, you'll need to retest. That's an avoidable failure that has nothing to do with content knowledge and everything to do with paperwork timing.
PSI offers both test-center and remote-proctored delivery, which gives some scheduling flexibility if a nearby center is booked out. For current windows and how far in advance to register, check AZ-B1 Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Who Actually Sits This Exam
The B-1 classification covers general commercial contracting, and the qualifying party on a license application typically needs four years of practical or management trade experience, with two of those years falling within the preceding ten. Approved technical education can substitute for up to two of the four years. In practice, that means most people sitting for this exam are experienced field supervisors, project managers, or tradespeople stepping into a qualifying-party role for a commercial contracting company - not entry-level workers.
Because the qualifying party's license underpins the company's ability to bid and perform commercial work, employers are frequently the ones pushing candidates toward this exam. If you're evaluating whether pursuing licensure changes your job prospects or income potential, AZ-B1 Jobs and AZ-B1 Salary Guide 2026: Complete Earnings Analysis both dig into that side of the decision. For a step-by-step look at the eligibility requirements themselves - experience years, the statutes course, background check, and bonding - see AZ-B1 Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Building a Study Plan Around the Domains That Matter Most
Generic study advice - spaced repetition, timed practice blocks, active recall - only becomes useful once it's mapped onto the actual domain weighting of this exam. Given that Concrete (14%) and Metals (13%) together represent more scored questions than any other pairing, a study calendar that spends equal time on all ten domains is leaving points on the table.
Concrete and General Building Code
- Work through IBC and IRC concrete provisions side by side
- Practice locating relevant sections quickly, since this is an open-book exam
Metals and Safety
- Cover structural steel, framing, and fastener requirements
- Pair with OSHA 29 CFR 1926 provisions on handling and erection
Sitework, Masonry, Carpentry, Thermal and Moisture Protection
- Move through the mid-weight domains
- Drill scenario-based multiple-choice questions rather than pure recall
Doors and Windows, Finishes, full-length review
- Finish the smaller domains
- Run a full 100-question timed practice session to rehearse the 4-hour pace
This isn't a universal template - if your field experience already covers Concrete or Metals thoroughly, shift the early weeks toward whichever domains you're weakest in. The point is to let the exam's own weighting, not a generic schedule, drive your priorities. A more detailed week-by-week plan, including how to combine reference-lookup drills with content review, is laid out in AZ-B1 Study Guide 2026: How to Pass on Your First Attempt.
Whichever schedule you follow, closing out your prep with realistic, timed practice questions matters more than any other single step. Running full-length simulations on AZ-B1 Exam Prep's practice tests before your scheduled date is the closest you can get to rehearsing the actual 4-hour, 100-question experience ahead of test day.
Frequently Asked Questions
No public, classification-specific pass rate is published by the Arizona Registrar of Contractors or PSI for the B-1 trade exam. The most reliable way to gauge your odds is to study the passing score (70% of 100 scored questions), the domain weighting, and the approved references, all covered in this article.
No. PSI may include 5 to 10 unscored experimental questions on the B-1 trade exam, but they aren't counted toward your 70% passing threshold. Since you can't identify them during the test, answer every question as if it's scored.
Concrete at 14% and Metals at 13% are the two largest domains on the B-1 content outline. If time is limited, mastering those two first gives you the best return before moving to the remaining eight domains.
Exam results must be used for the license application within two years of your test date. If that window closes before you complete your application, you'll need to retest, regardless of your original score.
Yes. B-1 applicants may use the NASCLA Accredited Commercial General Building exam in place of the Arizona-administered trade exam, which can be useful if you already hold that credential from other state licensing work.