- Understanding the AL-MP Exam
- Registration and Fee Breakdown
- Exam Format: Trade Exam and Business Law
- The 11 Domains You Must Master
- Approved References and Exam-Day Materials
- Building a Domain-Weighted Study Timeline
- After You Pass: Certification and Renewal
- Common Mistakes That Sink First-Time Candidates
- Frequently Asked Questions
- The AL-MP trade exam is 100 questions, open book, 4.17 hours, with a 70% passing score.
- Starting January 1, 2026, Master applicants must also pass a separate 40-question Business Law exam.
- Combined trade and Business Law examination fees total $260, plus a $50 application fee and $175 certificate fee.
- Sizing and Design and System Installation carry the heaviest weight of the 11 exam domains.
Understanding the AL-MP Exam
The Alabama Master Plumber Exam, administered through Prov on behalf of the Alabama Plumbers and Gas Fitters Examining Board, is the official trade examination that stands between a licensed journeyman and full Master Plumber status in the state. On this site, "AL-MP" refers specifically to this credential and this credential only. If you've landed here after searching a broader definition, our overview article on What Is AL-MP? and the companion piece on AL-MP Meaning both walk through exactly what the acronym covers in this context.
This guide is built around the Prov bulletin dated December 15, 2025, and the January 2026 Board application for in-state Master candidates. Every fee, timeline, and domain figure in this article traces back to those two documents, not to generic exam-prep assumptions. If you want the full domain-by-domain breakdown before you commit to a study plan, pair this guide with AL-MP Exam Domains 2026: Complete Guide to All 11 Content Areas.
Registration and Fee Breakdown
Fee mechanics trip up more candidates than the actual plumbing content does, so get this right first. The trade examination itself costs $160. Starting January 1, 2026, Master applicants must also sit for a separate Business Law examination, which costs $100 - bringing your combined examination fees to $260. That's before you touch the Board's administrative fees.
Separately, the Board's fee schedule lists a $50 initial application processing fee and a $175 initial Master certificate fee, which you pay once you've passed both required exams and are ready to obtain your certificate. Budget for all four line items when you plan your application, not just the exam fees. For a full walkthrough of every dollar amount and when each one is due, see AL-MP Certification Cost 2026: Complete Pricing Breakdown.
| Exam | Questions | Time Allowed | Passing Score | Fee |
|---|---|---|---|---|
| Trade Exam (Master Plumber) | 100 | 4.17 hours | 70% | $160 |
| Business Law Exam | 40 | 2 hours | 70% | $100 |
Key Takeaway
Only a failed examination must be repeated - if you pass the trade exam but fail Business Law (or vice versa), you retake only the one you missed, not both.
Exam Format: Trade Exam and Business Law
The trade examination is computer-administered and open book, covering 100 questions across the 11 official domains in 4.17 hours. "Open book" here means you're allowed approved references, not that the exam is easy - the questions are still applied, scenario-based items pulled from real plumbing scenarios governed by the 2021 IPC and 2021 IFGC.
The Business Law exam is a shorter, separate 40-question test with a 2-hour window, also requiring a 70% passing score. It covers the regulatory and business-practice side of running a licensed plumbing operation in Alabama rather than technical trade content - a different mindset than the trade exam, so don't try to cram both into the same study session.
You can sit for either exam at a physical test center or through an eligible Examroom remote appointment, giving you flexibility if you're juggling a full work schedule. If you're still weighing how difficult this format actually is compared to what you've heard about other state exams, How Hard Is the AL-MP Exam? Complete Difficulty Guide 2026 breaks down the real difficulty factors rather than rumors.
The 11 Domains You Must Master
The trade exam's 100 questions are allocated across 11 official domains, and the allocation is not even - two domains dominate the test, and your study hours should reflect that reality rather than an equal split.
Domain 3: Sizing and Design
One of the two largest domains on the exam. Expect heavy coverage of pipe sizing calculations, fixture unit loads, and design decisions that determine whether a system will actually function under Alabama code.
- Water supply and DWV sizing methodology
- Fixture unit tables and their practical application
- Design choices tied to 2021 IPC requirements
Domain 4: System Installation
The other largest domain. This is where theoretical sizing knowledge meets real installation sequencing, support spacing, and rough-in practices a Master-level plumber is expected to supervise correctly.
- Installation sequencing and code-compliant methods
- Support and hanger spacing requirements
- Field judgment questions rather than pure memorization
Domain 10: Drain Waste and Vents
DWV systems show up throughout the exam in both dedicated questions and cross-referenced sizing scenarios, making this domain worth mastering alongside Sizing and Design rather than in isolation.
- Venting configurations and trap arm limits
- Cleanout placement and slope requirements
- Interaction between DWV design and fixture layout
The remaining eight domains - General Knowledge, Drawings and Plan Reading, Trade Math, Tools, Water Heaters, Roof Drain Systems, Fixtures and Fittings, and Safety - round out the 100-question trade exam and cannot be skipped, even though they individually carry fewer questions than Sizing and Design or System Installation. A gap in any one of them can still cost you the points needed to clear the 70% threshold. For the exact question-count allocation across all 11 areas, cross-reference AL-MP Exam Domains 2026: Complete Guide to All 11 Content Areas and confirm your understanding of the passing threshold itself in AL-MP Passing Score 2026: Exactly What You Need to Pass.
Approved References and Exam-Day Materials
Because the trade exam is open book, what you're allowed to bring matters almost as much as what you know. Approved references, permanent tabs, highlighting, and a simple four-function calculator are all permitted. Alabama-specific rules also allow pen-only margin notes without calculations written into your references.
What's prohibited is just as important: movable tabs, Post-it notes, added photocopies, and practice-test books are not allowed in the exam room. If your current copy of the 2021 IPC or 2021 IFGC is loaded with sticky flags or loose inserts, you'll need to convert to permanent tabs before test day or risk having materials rejected at check-in.
Building a Domain-Weighted Study Timeline
A generic six-week study calendar isn't useful here - your schedule should mirror the exam's actual weight distribution. Since Sizing and Design and System Installation are the largest domains, they deserve the most calendar time, not an equal one-eleventh share alongside Safety or Tools.
Sizing and Design + System Installation
- Work through fixture unit and pipe sizing calculations using your tabbed IPC references
- Practice installation sequencing scenarios and support spacing questions
Drain Waste and Vents + Water Heaters
- Study venting configurations and trap arm limits
- Review water heater sizing, venting, and installation code requirements
Trade Math, Drawings and Plan Reading, Roof Drain Systems
- Drill calculation-heavy question types you'll answer with your four-function calculator
- Practice reading plumbing plans and roof drain sizing scenarios
General Knowledge, Tools, Fixtures and Fittings, Safety
- Round out the remaining lighter-weighted domains
- Confirm your reference tabs are permanent, not movable
Business Law Review and Full Timed Run-Through
- Shift focus to the separate 40-question Business Law exam
- Simulate the 4.17-hour trade exam window under open-book conditions
Notice that the Business Law exam gets its own dedicated week rather than being blended into trade-content study. The two exams test different knowledge domains entirely, and treating them separately in your calendar avoids mental context-switching during your final review push.
After You Pass: Certification and Renewal
Passing both exams isn't the finish line - it starts a clock. You must obtain your Master certificate within 90 calendar days after passing both required examinations, so don't let paperwork sit once your scores come back. This is also when the $175 initial Master certificate fee comes due, on top of the $50 application processing fee you paid earlier in the process.
Once certified, Master certificates renew annually for $175 during the October 1 through December 31 window. Renewal also requires four approved continuing education hours annually, subject to Board exemptions. Plumber-only holders need all four hours in plumbing, while dual plumbing/gas holders split the four hours between the two trades. If you're aiming for 2027 certification, complete and submit your CE before November 1, 2026, then renew during the October 1-December 31, 2026 window - missing either deadline creates avoidable friction with the Board.
For a complete picture of what's required before you even sit for the exam, review AL-MP Requirements 2026: Eligibility, Prerequisites & How to Qualify, and check AL-MP Exam Dates 2026: Testing Windows, Deadlines & Scheduling to line up your application timeline with these renewal deadlines from day one.
Common Mistakes That Sink First-Time Candidates
- Treating the exam as equally weighted across all 11 domains. Skimping on Sizing and Design or System Installation because they "feel" like just two of eleven topics ignores how heavily they're actually tested.
- Bringing prohibited materials to test day. Post-it notes, movable tabs, and photocopied pages will get flagged - convert everything to permanent tabs well before your appointment.
- Underestimating the Business Law exam. It's shorter at 40 questions and 2 hours, but it still requires the same 70% passing score and covers material the trade exam doesn't touch.
- Missing the 90-day certificate window. Passing both exams and then delaying your certificate application can create unnecessary administrative headaches.
- Ignoring CE deadlines until renewal season. Waiting until October to think about your four annual CE hours risks missing the November 1 submission cutoff for the following year's certification.
Before your test date, run through a condensed review using AL-MP Cheat Sheet 2026: One-Page Review of Must-Know Facts, and if you want to see how your prep stacks up against real exam conditions, work through timed questions on our practice test platform to build familiarity with the pacing before you sit for the actual computer-administered exam.
Frequently Asked Questions
The Business Law exam requirement applies to Master applicants under the January 1, 2026 requirement. Check current Board guidance for your specific application timeline and status.
Yes. Only a failed examination must be repeated - if you pass the trade exam but fail Business Law, or vice versa, you only retake the one you did not pass.
A simple four-function calculator is permitted, along with approved references, permanent tabs, highlighting, and pen-only margin notes without calculations.
You must obtain your Master certificate within 90 calendar days after passing both required examinations.
Yes, both test-center appointments and eligible Examroom remote appointments are available for the AL-MP trade and Business Law exams.