MA-MP Pass Rate 2026: What the Data Shows

What the Board Actually Publishes About Pass Rates

If you're searching for a hard percentage - "X% of candidates pass the Massachusetts Master Plumber License Exam" - you won't find one in the official bulletin, on the Division of Occupational Licensure's site, or through PSI Services LLC, the vendor that administers the test. The PSI candidate bulletin dated October 3, 2025 lays out the structure of the exam, the fees, the references, and the scoring rules, but it does not report aggregate pass/fail statistics for MA-MP. The Massachusetts Board of State Examiners of Plumbers and Gas Fitters likewise does not publish a running pass-rate figure for the master plumber exam on mass.gov.

That absence is worth sitting with for a moment, because it changes how you should think about "pass rate" as a planning tool. Rather than benchmarking yourself against an unknown population average, the more useful exercise is understanding exactly how the exam is scored, what it weights, and how the retake rules work - because those mechanics are public, specific, and directly within your control.

Why There's No Single "MA-MP Pass Rate" to Quote

Part of the reason a single pass-rate figure would be misleading even if it existed is that MA-MP is not one test - it's two independently scored, independently timed exams administered under one exam appointment structure. Master Plumber Part I - Written covers 80 questions in 160 minutes across 12 domains. Master Plumber Part II - Practical covers 40 questions in 160 minutes across four domains focused on isometric analysis and trade/gas calculations. Combined, that's 120 questions and 320 minutes of testing, but the two parts are not interchangeable pools of time or difficulty. A candidate who is strong on code recall but weak on isometric drawing interpretation could pass Part I comfortably and fail Part II, and vice versa for someone coming from heavy field experience with piping layouts but thinner code-book familiarity.

Any single blended pass-rate number would obscure that split entirely. For a clearer breakdown of what each domain actually tests, see the MA-MP Exam Domains 2026: Complete Guide to All 16 Content Areas, and for a broader look at where candidates tend to struggle, the How Hard Is the MA-MP Exam? Complete Difficulty Guide 2026 article walks through the difficulty picture part by part.

The 70% Threshold on Each Part, Independently

The scoring rule itself is simple to state and easy to underestimate: a minimum of 70% is required on each part, scored independently. There is no combined average and no way to let a strong Part I score compensate for a weak Part II score, or the reverse. Both parts are closed-book, computer-generated examinations administered through PSI test centers.

This independent-scoring structure is arguably the single most important fact in this article, because it means your prep plan needs two separate passing strategies rather than one blended one. A candidate who studies only code language and general regulations might clear Part I with room to spare, then be caught off guard by the calculation-heavy, drawing-based nature of Part II. For the exact numeric target and how it's typically calculated per part, see MA-MP Passing Score 2026: Exactly What You Need to Pass.

Two Parts, Two Different Risk Profiles

Part I - Written spans 12 domains: General Regulations, Inspections, and Permits; Gas Piping, Equipment, and Appliances; Venting; Traps and Cleanouts; Fixtures, Equipment, and Clearances; Water Heaters; Piping, Valves, and Controls; Water Supply; Hangers and Supports; Drain, Waste, and Vent; Separators, Interceptors, and Grease Traps; and Joints and Connections. The item counts across those domains are 9, 21, 12, 2, 2, 3, 3, 6, 2, 13, 5, and 2 respectively - 80 questions total.

Part II - Practical spans four domains: Isometric Analysis (20 items), General Trade Calculations (5 items), Gas Piping (7 items), and Gas Venting (8 items) - 40 questions total. Part II is closed-book like Part I, but its emphasis on reading isometric drawings and running trade and gas calculations makes it a different kind of cognitive task than recalling code sections.

Because the two parts test different skills under different pressure, candidates often self-report feeling more confident about one part than the other going in. That asymmetry is exactly why "pass rate" as a single number would flatten out real, useful information. If you want the full domain-by-domain breakdown with content notes for all 16 areas, the MA-MP Exam Domains 2026 guide is the companion resource to this article.

Domain Weighting and Where Points Are Concentrated

Weighting is not evenly distributed across domains, and knowing the concentration points is one of the most concrete things you can do to manage your preparation time.

Because these two domains alone account for a large share of total questions across both parts, a study plan that shortchanges them is taking on outsized risk. The MA-MP Cheat Sheet 2026 condenses the highest-yield facts from both domains into a single review page for last-week prep.

Retake Mechanics That Change Your Pass-Rate Math

Even without a published pass-rate number, the retake structure tells you a lot about how the Board expects candidates to move through the process. Master-level attempts are unlimited under the current bulletin - there's no cap on how many times you can sit for the exam. More importantly, a passing part remains valid for one year, and only the failed part needs to be retaken while the passing score is still valid. That means a candidate who clears Part I but comes up short on Part II doesn't have to redo the written portion; they schedule and pay for Part II again within that one-year window.

The financial mechanics matter here too. The examination administration fee is $80 for an initial attempt or a retake, separate from the $31 application fee and the $78 initial license fee. Retaking a single failed part costs the same $80 administration fee as a full attempt, so the real cost of a miss is one part's fee, not the whole exam's. A full breakdown of every fee in the process - application, exam, initial licensing, and biennial renewal - is laid out in MA-MP Certification Cost 2026: Complete Pricing Breakdown.

A Domain-Based Prep Timeline

Generic study techniques - spaced repetition, timed drills, active recall - work for MA-MP the same way they work for any high-stakes exam, but they're only useful when mapped onto the actual domain weights above. Here's how a candidate balancing Tier Five review with field work might sequence the weeks leading up to test day.

For a more detailed, step-by-step walkthrough of this kind of plan, see the MA-MP Study Guide 2026: How to Pass on Your First Attempt. And if you're still confirming you meet the underlying eligibility rules - the journeyman license, the 1,700 qualifying hours, and the 110-hour Tier Five education - the MA-MP Requirements 2026 guide covers that in full before you even get to scheduling.

The Veteran Credit and Other Edge Factors

One specific, publicly documented factor that shifts individual outcomes: eligible veterans receive a five-percent examination credit upon submission of DD214 documentation, per the current bulletin. This is applied at the individual level rather than showing up in any aggregate pass-rate figure, but it's worth knowing about and applying for if you qualify, since it's a documented benefit rather than a rumor.

Beyond that, a few structural details are easy to overlook but affect your actual odds on test day:

• Reference books are not permitted in the exam center, so anything you plan to "look up" during the test - code sections, NFPA references, MGL Chapter 142 citations - has to already be memorized or reasoned through from first principles.
• Only a silent, non-printing, non-programmable calculator without alphabet keys is allowed; PSI supplies scratch paper, so practicing with an approved calculator model beforehand avoids a fumbling moment during Part II's trade calculations.
• Both parts are computer-generated exams, which typically means practicing on a screen-based interface rather than paper printouts pays off more directly than it might for a paper-and-pencil test.

None of these factors will hand you a pass-rate statistic, but each one is a controllable variable that shows up in the bulletin itself. For context on why licensed master plumbers pursue this credential in the first place - and what it opens up professionally - see MA-MP Salary Guide 2026: Complete Earnings Analysis and Is the MA-MP Certification Worth It? Complete ROI Analysis 2026.

If you're building out your practice routine, working through timed, domain-weighted questions on a MA-MP-specific practice test platform is a more direct way to gauge your readiness than any published pass-rate figure could ever be - because it shows you, part by part, exactly where your own 70% threshold currently sits. Combining that kind of practice with the domain breakdowns on the main practice site gives you a realistic read on both Part I and Part II independently, which is the only scoring split that actually matters for your license.

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