- MI-JP Requirements Overview
- Age, Apprenticeship, and Hours Requirements
- LARA Application Process
- Written Exam Format and Fees
- Open-Book Rules and Approved References
- What the Three Domains Actually Test
- The BCC Practical Exam Requirement
- The One-Year Application Window
- Licensing, Renewal, and Ongoing Requirements
- Scheduling Your Prep Around the Requirements
- Frequently Asked Questions
- You need at least 6,000 hours over three years as a registered apprentice before applying.
- LARA approval must happen before you can schedule the PSI written exam.
- The written exam is 125 questions in 180 minutes, open-book, with a 75% passing score.
- Written and practical exams must both be passed within the same one-year application period.
MI-JP Requirements Overview
Qualifying for the Michigan Journey Plumber License Exam (MI-JP) is not a matter of registering online and picking a test date. It's a documentation-heavy process governed by the Michigan Department of Licensing and Regulatory Affairs (LARA) through its Bureau of Construction Codes (BCC), with the written examination itself administered by PSI Services LLC. Before you ever sit in front of a PSI computer terminal, LARA has to verify your apprenticeship hours, your age, and your supervising license, and approve your application.
This guide walks through every eligibility gate in order - apprenticeship hours, the LARA application, the PSI written exam mechanics, the reference-material rules, and the separate BCC practical exam - so you know exactly what to assemble before you spend a dollar on fees. For a broader look at what the credential covers, see What Is MI-JP? and MI-JP Certification.
Age, Apprenticeship, and Hours Requirements
Before LARA will even review an application, candidates must meet three baseline conditions:
- Minimum age: You must be at least 18 years old.
- Apprenticeship hours: A minimum of 6,000 hours of documented plumbing work.
- Apprenticeship duration: Those hours must span at least three years as an actively registered plumbing apprentice.
Critically, this experience can't be informal on-the-job time. It has to be earned while registered as an apprentice under the direct supervision of a licensed master plumber or journey plumber. LARA requires notarized employer experience statements documenting the hours, employer, and supervising license - so if you've been keeping loose mental tallies of your apprenticeship time, now is the moment to start gathering signed, notarized paperwork from every employer who supervised you.
Key Takeaway
Start collecting notarized employer experience statements well before you plan to apply. Missing or unsigned documentation is one of the most common reasons LARA applications stall.
LARA Application Process
The sequence matters. Applicants cannot simply register with PSI on their own timeline - LARA approval must come first. Only after LARA reviews and approves the application (verifying age, hours, and supervising licensure) can a candidate move to schedule the written exam through PSI.
The LARA application itself carries a $40 initial license fee, which is separate from the exam fees charged by PSI. Keep in mind this fee structure is specific to the Journey Plumber pathway and shouldn't be confused with cost breakdowns for other credentials - for a full accounting of every fee involved, see MI-JP Certification Cost 2026: Complete Pricing Breakdown.
Written Exam Format and Fees
Once LARA approval is in hand, the written examination is administered exclusively at a physical PSI test center - there is no remote-proctoring option for the Journey Plumber written exam. The format is consistent and worth memorizing before you plan your study schedule:
| Exam Detail | Specification |
|---|---|
| Number of questions | 125 |
| Time allowed | 180 minutes |
| Format | Computer-based, open-book |
| Passing score | 75% |
| PSI fee per attempt | $100 |
| Testing location | PSI test center (no remote proctoring) |
PSI allows repeat attempts if you don't pass on the first try, but each retake requires a new $100 exam fee, and every attempt still has to fall within your active one-year LARA application window. For a deeper look at what a 75% cutoff actually means in terms of missed questions, read MI-JP Passing Score 2026: Exactly What You Need to Pass. And if you're trying to gauge how tough this exam really is relative to your current knowledge, How Hard Is the MI-JP Exam? Complete Difficulty Guide 2026 breaks that down further.
Open-Book Rules and Approved References
The "open-book" designation is one of the most misunderstood parts of the MI-JP written exam. It does not mean you can bring in personally annotated study materials. PSI's bulletin (effective April 29, 2026) lays out strict formatting rules for what you're allowed to bring into the test center:
- Approved codes/statutes: The 2021 Michigan Plumbing Code, the State Construction Code Act (1972 PA 230), and the Skilled Trades Regulation Act (2016 PA 407).
- Tabs are fine: Chapter tabs on your code books are permitted.
- No markings allowed: Highlighting, underlining, and handwritten notes anywhere in the code books are prohibited.
- Printed statutes need separate binding: Any statutory references printed from the BCC website must be assembled as standalone documents, each bound with three staples along the left edge - no tabs, no markings.
- No loose papers: Nothing else - no notes, no printouts, no attached sheets - is allowed in with your references.
What the Three Domains Actually Test
PSI's written exam blueprint organizes content into three broad domains. Unlike some licensing exams that publish precise percentage weightings per domain, the MI-JP bulletin describes these as broad coverage areas, meaning your preparation needs to be thorough across all three rather than narrowly focused on a single high-weight section.
Domain 1: Plumbing Theory
Covers the underlying scientific and engineering principles behind plumbing systems - pressure, flow, venting theory, and the "why" behind code requirements.
- Hydraulic and pneumatic principles governing drainage and supply
- Vent system theory and trap-seal protection
- Backflow prevention concepts
Domain 2: The Practice of Plumbing
Focuses on applied, hands-on knowledge - the practical decisions a journey plumber makes on a job site.
- Fixture installation and water distribution layout
- Special waste systems handling
- Testing and inspection procedures on completed installations
- Reading and interpreting isometric drawings
Domain 3: State Plumbing Code, Rules and Regulations
Tests direct knowledge of the 2021 Michigan Plumbing Code and the statutory framework governing plumbing licensure and practice in Michigan.
- Code citations relevant to drainage, venting, and fixture systems
- Application of the State Construction Code Act and Skilled Trades Regulation Act
- Code-based reasoning for real-world compliance scenarios
Because the exam blends theory, applied practice, and code lookup skills, your study plan needs to build genuine comprehension, not just memorized code citations. For a domain-by-domain breakdown with more granular subtopics, see MI-JP Exam Domains 2026: Complete Guide to All 3 Content Areas, and pair that with a full MI-JP Study Guide 2026: How to Pass on Your First Attempt for a structured prep plan.
The BCC Practical Exam Requirement
Passing the PSI written exam is only half the licensure requirement. A separate BCC hands-on practical examination must also be passed, and it operates on its own scheduling logistics:
- The published practical session runs from 10:00 a.m. to 12:30 p.m.
- Scheduling requests must meet a 30-day cutoff before the session date.
Because the practical exam is administered by BCC rather than PSI, its scheduling process and timing are entirely separate from the written exam booking through PSI. Candidates need to track both calendars independently, and both results have to land within the same one-year application window described below.
The One-Year Application Window
This is one of the most consequential - and most overlooked - requirements in the entire MI-JP process: both the written exam and the practical exam must be passed within the same one-year application period tied to your LARA application. A passing result does not carry over to a new application if that window lapses.
In practical terms, this means:
- If you pass the written exam early but delay scheduling the practical, and the year runs out, your written pass is void for that application.
- If you fail the written exam multiple times, each retake ($100 to PSI) still has to happen inside the same one-year clock - there's no separate extension for retakes.
- Applicants who let the window expire must reapply to LARA and restart the entire process, including refiling documentation.
Key Takeaway
Treat your LARA approval date as the start of a one-year countdown. Book both the written and practical exams early enough to leave room for at least one retake if needed.
Licensing, Renewal, and Ongoing Requirements
Once you've passed both exams and LARA issues your Journey Plumber license, maintaining it requires annual renewal by April 30 for a $40 fee. This is a routine administrative step, but missing the deadline can lapse your license, so it's worth calendaring alongside any other trade renewals you hold.
Separately, licensees are required to complete a board-approved code-update course within one year after a new plumbing code is adopted - not on a recurring annual basis, but specifically tied to code adoption events. This distinction matters: it's not a yearly continuing-education requirement in the traditional sense, but a triggered obligation tied to Michigan's code update cycle.
Scheduling Your Prep Around the Requirements
Given the one-year window and the two-exam structure, the smartest approach is to sequence your studying around the actual mechanics of the requirements rather than a generic countdown calendar. A workable structure looks like this:
Document Verification
- Confirm all 6,000+ hours are documented and notarized before submitting to LARA
- Gather clean, unmarked copies of the 2021 Michigan Plumbing Code and both statutes for exam day
Domain 1 and Domain 3 Foundations
- Build theory understanding (Domain 1) alongside code navigation skills (Domain 3), since code lookups depend on understanding the underlying principles
Domain 2 Applied Practice
- Work through isometric drawing interpretation, fixture installation scenarios, and inspection/testing procedures
Timed Practice and Reference Drills
- Practice locating code sections quickly under time pressure - 180 minutes for 125 questions leaves little room for slow page-flipping
Because the exam is open-book but time-limited, speed at locating the right code section matters almost as much as understanding it. Practicing with realistic question sets - like those available through the MI-JP practice test platform - helps build that lookup speed before test day. You can also review MI-JP Cheat Sheet 2026: One-Page Review of Must-Know Facts for a condensed reference of the requirements covered here.
If you're still weighing whether pursuing this license fits your career goals, Is the MI-JP Certification Worth It? Complete ROI Analysis 2026 and MI-JP Jobs offer context on where licensed journey plumbers work across Michigan. For a general primer before diving deeper, MI-JP Meaning and What Does MI-JP Stand For? cover the basics, and the main practice test hub is a good starting point for hands-on preparation.
Frequently Asked Questions
The requirement is at least 6,000 hours over a minimum of three years as a registered apprentice, documented with notarized employer statements. LARA reviews this documentation as part of approving your application, so the hours need to be completed and verifiable before you apply.
No. Journey Plumber candidates must test at a physical PSI test center. Remote proctoring is not available for this exam.
Both exams must be passed within the same one-year application period. If the practical isn't passed within that window, the written exam pass does not carry over to a new application - you would need to reapply and retake both.
No. Chapter tabs are allowed, but highlighting, underlining, and handwritten notes are prohibited on approved reference materials. Printed statutory references must also be separately bound with three staples on the left edge, with no markings or tabs.
Each attempt requires a new $100 fee paid to PSI, and retakes must still occur within your active one-year LARA application window.