- The exam has 50 questions, a two-hour limit, and an open-book format under Prometric's C10010 catalog.
- Two variants exist: exam 910104 needs 70% to pass, exam 910154 needs 75% - confirm which one your sponsor authorizes.
- Labor Laws is the single largest domain at 16% of the exam - prioritize it in review.
- Only the Contractor's Reference Manual, Eighth Edition, and IRS Circular E are permitted references.
Exam Snapshot: Format, Time, and Scoring
Before you memorize a single fact, lock in the mechanics. The Contractor Business and Law Examination (Prometric) is administered under Prometric's official C10010 Business and Law catalog outline. That outline sets the structure every candidate sits for: 50 questions, an 11-domain blueprint, and a strict two-hour time limit. It is an open-book exam, but "open-book" comes with real limits you need to understand before test day, not during it.
There are two Prometric exam numbers tied to this catalog outline, and they are not interchangeable:
- Exam 910104 - requires a 70% passing score
- Exam 910154 - requires a 75% passing score
Your licensing sponsor determines which exam number you're authorized to sit for - this is not a choice you make at the testing center. Registering for the wrong number, or assuming a passing threshold that doesn't match your assigned exam, is an avoidable mistake. For a full walkthrough of how these two thresholds work and what "authorized exam number" actually means for your paperwork, see the CBL-Prometric Passing Score guide.
The 11 Domains at a Glance
Every version of the Contractor Business and Law Examination (Prometric) pulls from the same 11 content areas. Percentages below reflect the proportional weight of each domain across the 50-question exam:
| Domain | Weight |
|---|---|
| Labor Laws | 16% |
| Contracts | 12% |
| Project Management | 12% |
| Financial Management | 10% |
| Tax Laws | 10% |
| Licensing | 8% |
| Estimating and Bidding | 8% |
| Business Organization and Management | 6% |
| Risk Management | 6% |
| Safety - OSHA | 6% |
| Lien Laws | 6% |
Notice how the top five domains - Labor Laws, Contracts, Project Management, Financial Management, and Tax Laws - together account for 60% of the exam. If your prep time is limited, that's where it needs to go first. For a deeper breakdown of what each domain actually tests, the CBL-Prometric Exam Domains Guide walks through all 11 content areas in detail.
What You Can (and Can't) Bring to the Test
The open-book format is one of the most misunderstood parts of this exam. "Open-book" does not mean "bring anything you want." Prometric's catalog outline specifies exact references and exact preparation rules:
Approved References
Only two resources are listed as permitted references for the exam:
- Contractor's Reference Manual, Eighth Edition
- IRS Circular E
Allowed vs. Prohibited Prep
- Allowed: Highlighting done before the test
- Allowed: Permanent tabs prepared in advance
- Prohibited: Handwritten notes anywhere in the reference material
- Prohibited: Removable Post-it style tabs
- Prohibited: Shared or borrowed reference copies
Key Takeaway
Build your tabbing system weeks before the exam, not the night before. Since only permanent tabs and pre-existing highlighting are allowed, you need to know your reference manual's structure well enough to flip to the right section in seconds - not read it cold during the two-hour window.
The Three Domains That Decide Your Score
With 50 questions on the line, the heaviest domains carry outsized influence over whether you clear 70% or 75%. Here's what to lock down in each.
Domain 8: Labor Laws (16%)
The single largest domain on the exam. Expect questions on wage and hour rules, worker classification, employer obligations, and workplace compliance issues that a contractor running a crew would face day to day.
- Know where labor law topics live in the Contractor's Reference Manual so you can find them fast under time pressure
Domain 4: Contracts (12%)
Covers the language and mechanics of construction contracts - the terms, obligations, and risk allocation that show up in real project agreements.
- Tab the contracts section distinctly since it's tested as heavily as Project Management
Domain 5: Project Management (12%)
Tests the operational side of running a job: scheduling, coordination, and the practical decisions contractors make between contract signing and project closeout.
- Pair this domain with Contracts in your review, since they interact heavily on the exam
Together with Financial Management (10%) and Tax Laws (10%) - which draws directly from IRS Circular E - these five domains make up 60% of the exam. Master them first, then round out the remaining six lower-weight domains. For candidates wondering how this weighting translates into real exam difficulty, How Hard Is the CBL-Prometric Exam? breaks down what makes the heavier domains challenging under time constraints.
Quick-Reference Facts by Domain
Use this as your one-page mental map before test day - it's not a substitute for full review, but it's what to recall instantly when you open the exam.
- Business Organization and Management (6%) - entity structures and management responsibilities of running a contracting business
- Licensing (8%) - requirements and obligations tied to holding a contractor license
- Estimating and Bidding (8%) - cost estimation and bid preparation fundamentals
- Contracts (12%) - contract terms, obligations, and risk allocation
- Project Management (12%) - scheduling and job-site operational decisions
- Risk Management (6%) - insurance and liability exposure for contractors
- Safety - OSHA (6%) - workplace safety compliance obligations
- Labor Laws (16%) - the largest domain; wage, hour, and employment compliance
- Financial Management (10%) - budgeting and financial oversight of contracting operations
- Tax Laws (10%) - tax obligations, tied closely to IRS Circular E
- Lien Laws (6%) - mechanic's lien rights and procedures
If you want a domain-by-domain study guide with more depth on each of these bullets, the CBL-Prometric Exam Domains Guide is the natural next stop after this cheat sheet.
Final-Week Review Schedule
Generic study techniques don't matter much here - what matters is sequencing your final review around the domain weights. This is not a full study plan; it's a compressed final push assuming you've already built domain knowledge. For a complete multi-week plan, see the CBL-Prometric Study Guide.
Heaviest domains first
- Review Labor Laws (16%), then Contracts and Project Management (12% each)
- Confirm your reference manual tabs cover these sections cleanly
Mid-weight domains
- Financial Management and Tax Laws (10% each)
- Cross-check Tax Laws material against IRS Circular E structure
Remaining domains
- Licensing, Estimating and Bidding (8% each)
- Business Organization, Risk Management, Safety-OSHA, Lien Laws (6% each)
Full run-through
- Take a timed practice test under two-hour conditions
- Practice locating answers in your reference manual quickly, since it's open-book but time-limited
Common Mix-Ups to Avoid on Test Day
Most avoidable point losses on this exam come from logistics, not content gaps. Watch for these:
- Wrong passing threshold assumption: Studying to a 70% mindset when your sponsor actually authorized exam 910154 (75%) leaves no margin for error. Double-check your exam number before test day.
- Improvised reference materials: Bringing anything other than the Contractor's Reference Manual, Eighth Edition, and IRS Circular E risks rejection at check-in.
- Sticky-note tabs: Removable Post-it tabs are prohibited - use permanent tabs prepared before the appointment.
- Handwritten annotations: Notes written in the margins of your reference manual are not allowed, even if the highlighting itself is permitted.
- Underestimating Labor Laws: At 16% of the exam, treating this domain as "just another topic" instead of the priority it is tends to show up in missed points.
If you're still deciding whether the credential itself is worth the investment before you commit serious study time, Is the CBL-Prometric Certification Worth It? covers the ROI question separately from exam mechanics. And if you haven't confirmed you meet eligibility yet, check the CBL-Prometric Requirements guide before you register.
Key Takeaway
Most exam-day problems are preventable weeks in advance: confirm your exam number, prepare permanent tabs, and know exactly which two references you're allowed to bring.
Frequently Asked Questions
The exam has 50 questions covering all 11 domains, administered under a two-hour time limit through Prometric's C10010 catalog outline.
Both follow the same 11-domain, 50-question, open-book format. Exam 910104 requires a 70% passing score, while exam 910154 requires 75%. Your licensing sponsor determines which exam number you must take.
No. Handwritten notes are prohibited. You may use highlighting and permanent tabs prepared before the test, but removable Post-it style tabs and shared reference copies are not allowed.
Labor Laws, since it's the largest domain at 16% of the exam. Follow that with Contracts and Project Management, each weighted at 12%.
Only the Contractor's Reference Manual, Eighth Edition, and IRS Circular E are listed as permitted references for this exam.
For related logistics like registration timing and scheduling windows, see CBL-Prometric Exam Dates 2026, and for a full cost breakdown before you register, review the CBL-Prometric Certification Cost guide. When you're ready to test your recall against exam-style questions, our practice platform mirrors the domain weighting covered in this cheat sheet.