- What "MI-RB" Actually Means
- Who Administers the Exam and Why It Matters
- Exam Format: One Combined Score, Two Domain Groups
- The 8 Business and Law Domains
- The 15 Practice/Trade Domains
- Registration, Fees, and Timeline Mechanics
- Education and Application Requirements Before You Test
- What the Passing Score Actually Requires
- After You Pass: License Renewal Mechanics
- Mapping a Study Schedule to the Domain Weights
- Frequently Asked Questions
- MI-RB means the Michigan Residential Builder License Examination, administered by PSI for LARA's Bureau of Construction Codes.
- The exam is one combined test: 50 Business and Law questions plus 110 Practice/Trade questions, 160 scored total.
- Passing requires 116 correct answers out of 160 (72.5%) within a 240-minute time limit.
- Carpentry (14 questions) is the largest single domain; Regulatory and Statutory Requirements (13 questions) leads Business and Law.
What "MI-RB" Actually Means
On this site, MI-RB stands for the Michigan Residential Builder License Examination - the state-mandated test that individuals must pass before they can hold a residential builder license in Michigan. It is administered on behalf of the Michigan Department of Licensing and Regulatory Affairs (LARA), Bureau of Construction Codes, by PSI Services LLC. This scope covers the full individual Residential Builder examination, not the narrower Maintenance & Alteration trade contractor exam that some confuse it with.
If you've landed here searching for a general definition, our companion piece What Is MI-RB? covers the same identity question from a slightly different angle, and What Does MI-RB Stand For? breaks the acronym down phrase by phrase.
Who Administers the Exam and Why It Matters
LARA's Bureau of Construction Codes sets the licensing requirements, but the actual test-day experience - scheduling, test center rules, scoring, and the official handbook - comes from PSI Services LLC. That distinction matters practically: your prelicensure education and application paperwork flow through LARA, while your exam registration, rescheduling, and score report flow through PSI.
PSI delivers the exam via computer-based testing at physical test centers, and candidates can sit for it in either English or Spanish. Before you can even book a seat, LARA must approve your eligibility - this is a hard sequencing rule, not a suggestion. For the full breakdown of who qualifies and what paperwork LARA wants, see MI-RB Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format: One Combined Score, Two Domain Groups
The current PSI handbook (dated August 3, 2026) describes a single, closed-book, multiple-choice examination - not two separate tests. It contains 160 scored questions, split into:
- 50 questions covering Business and Law (Domains 1-8)
- 110 questions covering Practice/Trade (Domains 9-23)
Candidates get 240 minutes to finish. Up to 10 additional unscored experimental questions may be mixed in without being flagged, so every question should be treated as if it counts. Because Business and Law and Practice/Trade are scored together as one exam - including on retakes - you cannot pass one half and simply retest the other. A retake means sitting for the full combined exam again, at the $117 retest fee.
Key Takeaway
Treat this as one 160-question exam with two content clusters, not two separate tests. Your prep plan and pacing strategy should reflect that single-score reality.
For a full walk-through of how each domain is weighted and what topics live inside them, read MI-RB Exam Domains 2026: Complete Guide to All 23 Content Areas. If you're still calibrating how tough this test really is relative to your background, How Hard Is the MI-RB Exam? Complete Difficulty Guide 2026 is worth reading before you commit to a study timeline.
The 8 Business and Law Domains
Business and Law makes up 50 of the 160 scored questions. The official per-domain allocations are:
Domain 1: Regulatory and Statutory Requirements - 13 questions
The single largest Business and Law domain. Covers Michigan-specific licensing statutes, LARA authority, and compliance obligations builders must know before signing a contract.
- Know licensing law structure, not just general contracting ethics
Domain 2: Types of Business Organization - 4 questions
Sole proprietorships, partnerships, LLCs, and corporations as they apply to a residential building company's licensing and liability posture.
Domain 3: Estimating - 1 question
A small allocation, but do not skip it entirely - one guaranteed question is still a question.
Domain 4: Contracts - 7 questions
Contract formation, required disclosures, and remedies specific to residential construction agreements in Michigan.
Domain 5: Project Management and Administration - 6 questions
Scheduling, subcontractor coordination, and administrative obligations tied to running a job site legally and efficiently.
Domain 6: Accounting and Finance - 6 questions
Basic financial management concepts a licensed builder must apply to bidding, billing, and cash flow.
Domain 7: Insurance, Bonds and Liens - 11 questions
The second-largest Business and Law domain. Expect detailed questions on lien rights, bonding requirements, and insurance obligations for residential projects.
Domain 8: Personnel - 2 questions
Employment and workforce management basics as they intersect with a builder's licensing responsibilities.
The 15 Practice/Trade Domains
Practice/Trade carries 110 of the 160 scored questions - nearly 70% of the exam - so this is where most study hours belong.
| Domain | Questions |
|---|---|
| 9. Site Engineering | 5 |
| 10. Plans, Specifications and Estimating | 14 |
| 11. Excavation/Sitework | 9 |
| 12. Footings and Foundation Walls | 11 |
| 13. Concrete | 7 |
| 14. Carpentry | 16 |
| 15. Masonry | 9 |
| 16. Roofing | 7 |
| 17. Insulation | 5 |
| 18. Ventilation | 2 |
| 19. Windows, Doors and Skylights | 5 |
| 20. Siding Installation | 3 |
| 21. Interior and Exterior Finishes | 5 |
| 22. Specialties | 2 |
| 23. Safety and Employee Protection Including MIOSHA | 10 |
Carpentry, at 16 questions, is the single largest domain on the entire exam - larger than any Business and Law domain. Plans, Specifications and Estimating (14) and Footings and Foundation Walls (11) round out the heaviest Practice/Trade topics. Safety and Employee Protection Including MIOSHA, at 10 questions, is also a substantial block that candidates with mostly field experience sometimes underestimate because it leans on regulatory text rather than hands-on skill.
Registration, Fees, and Timeline Mechanics
The mechanics of getting to test day are straightforward but sequence-sensitive:
- Exam or retest fee: $117, paid to PSI
- Initial individual license application fee: $195, paid to LARA
- Approval order: LARA must approve your application before PSI will let you schedule the exam
- Application window: the entire process must be completed within one year of LARA approval
Missing that one-year window means restarting parts of the application process, so treat the clock as active the moment you're approved - not the moment you feel ready to study. A detailed cost breakdown, including how these fees interact with prelicensure education costs, is available in MI-RB Certification Cost 2026: Complete Pricing Breakdown. For scheduling logistics and how testing windows work at PSI centers, see MI-RB Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
Education and Application Requirements Before You Test
Standard applicants must complete 60 hours of LARA-approved prelicensure education before sitting for the exam. That total breaks down into:
- At least 6 hours in each of 7 prescribed subject areas (42 hours minimum across those subjects)
- 18 elective hours to round out the 60-hour total
Beyond the coursework, your application package needs a physical Michigan business address, valid identification, verification of your completed education, and a good-moral-character certification. None of this is optional paperwork - LARA checks it before granting the approval that unlocks PSI scheduling.
If you're weighing whether the licensing route is worth pursuing given the time and cost involved, Is the MI-RB Certification Worth It? Complete ROI Analysis 2026 lays out the considerations without inventing numbers that aren't part of the official record.
What the Passing Score Actually Requires
The passing raw score is 116 correct answers out of 160, which equals 72.5%. Because the exam is scored as one combined test, that 116 threshold applies to your total correct count across both Business and Law and Practice/Trade - there's no separate cutoff for each half.
This has a real strategic implication: a candidate who is very strong in Practice/Trade topics like Carpentry and Roofing but weak on Regulatory and Statutory Requirements can still fail overall if the combined total lands under 116. Conversely, strength in Business and Law can help offset a rough patch in a smaller trade domain. For a deeper walkthrough of scoring mechanics and what a "safe" margin above 116 looks like when planning your prep, see MI-RB Passing Score 2026: Exactly What You Need to Pass.
Key Takeaway
You need 116 correct out of 160 combined - not 116 out of Business and Law alone, and not a separate passing threshold per half of the exam.
After You Pass: License Renewal Mechanics
Passing the exam is only one step. Once licensed, individuals must renew every three years by May 31 of their renewal year, paying a $150 renewal fee. Renewal years are staggered across licensees, so your specific cycle depends on when you were originally licensed.
Continuing education requirements shift over time:
- First two renewal cycles: 21 continuing-education hours each
- Subsequent cycles: 3 hours each
Keep your completion records on file - they're subject to audit. One detail that trips up qualifying officers: a company license and its qualifying officer's individual license are maintained separately. Renewing one does not automatically renew the other.
Mapping a Study Schedule to the Domain Weights
Generic study techniques only help if they're pointed at the right targets. Given that Carpentry (16 questions), Plans/Specifications/Estimating (14), Regulatory and Statutory Requirements (13), Footings and Foundation Walls (11), and Insurance/Bonds/Liens (11) together account for a large share of the 160 scored questions, a weighted schedule makes more sense than an even split across 23 domains.
Business and Law Foundations
- Regulatory and Statutory Requirements (13 questions) and Insurance, Bonds and Liens (11 questions) - the two heaviest Business and Law domains
- Contracts (7 questions)
Heaviest Practice/Trade Domains
- Carpentry (16 questions) and Plans, Specifications and Estimating (14 questions)
- Footings and Foundation Walls (11 questions)
Mid-Weight Trade Domains
- Excavation/Sitework (9), Masonry (9), Safety and Employee Protection Including MIOSHA (10)
- Concrete (7) and Roofing (7)
Lighter Domains, Full-Length Practice, and Review
- Remaining small domains: Site Engineering, Insulation, Windows/Doors/Skylights, Interior and Exterior Finishes, Siding, Specialties, Ventilation, Estimating, Personnel, Types of Business Organization
- Full 160-question timed practice runs under 240 minutes
For a complete methodology built around this exact domain structure, including how to sequence reviews and where to focus repeat practice questions, see MI-RB Study Guide 2026: How to Pass on Your First Attempt. A condensed reference for the final days before your test is available in MI-RB Cheat Sheet 2026: One-Page Review of Must-Know Facts. You can also run realistic, domain-weighted practice questions on the main MI-RB practice test platform to simulate the 240-minute, 160-question format before test day.
Frequently Asked Questions
On this site, yes - MI-RB refers exclusively to the Michigan Residential Builder License Examination administered through LARA's Bureau of Construction Codes and delivered by PSI. Other industries use similar acronyms for unrelated credentials; those are not covered here.
It's one combined, closed-book, multiple-choice exam with 160 scored questions total - 50 Business and Law plus 110 Practice/Trade - taken and scored together, including on retakes.
116 correct answers out of 160 scored questions, which equals 72.5%, within the 240-minute time limit.
Carpentry, with 16 questions, is the largest single domain on the exam overall. Within Business and Law, Regulatory and Statutory Requirements leads with 13 questions.
The exam or retest fee is $117, separate from the $195 initial individual license application fee paid to LARA. Prelicensure education costs are additional and vary by provider.
Understanding exactly what MI-RB stands for - and exactly how PSI and LARA structure the 160-question, two-domain-group exam - is the foundation for every other decision you'll make about registration, study time, and renewal planning. Start building domain-specific familiarity early, and use full-length MI-RB practice tests to confirm you can hit 116 correct under real time pressure before you schedule test day.