MD-JP Passing Score 2026: Exactly What You Need to Pass

The Passing Score: What COMAR Actually Requires

If you're prepping for the Maryland Journeyman Plumber License Exam - administered through the Maryland State Board of Plumbing and delivered by PSI Services LLC - the number that matters most is 70%. That threshold is not a rumor or an industry rule of thumb; it's written into COMAR 09.20.02.03 and confirmed in the official PSI candidate bulletin. Score at or above 70% on the base examination and you pass. Score below it and you'll need to schedule a retake.

This exam is officially titled the Journey Plumber/Gas Fitter combined examination. "Journeyman plumber" is simply the common search term, and MD-JP is the shorthand this site uses to talk about it. Whatever you call it, the passing standard doesn't change: 70% is 70%, regardless of which domain the questions come from.

Exam Format and Why It Affects Your Score

Before you can translate "70%" into a study plan, you need to understand exactly what you're being scored on. The Journey Plumber/Gas Fitter exam is a computer-based, multiple-choice test consisting of a 100-question base exam administered over 240 minutes. That's your scored content - the portion that determines whether you clear the passing score.

PSI may also insert five to ten additional, unscored experimental questions into your session. These items are used to evaluate future exam content and are given extra time outside your base 240-minute allowance, so they shouldn't eat into the clock you need for the scored questions. The catch: you won't know which questions are experimental and which are scored, so every question deserves your full attention regardless of how it feels.

For a full breakdown of how this format compares to other licensing exams and whether it's genuinely tough to clear, see How Hard Is the MD-JP Exam? Complete Difficulty Guide 2026.

The Math: How Many Questions You Need Right

Because the passing score is expressed as a percentage of a 100-question base exam, the arithmetic is refreshingly simple: you need approximately 70 correct answers out of the 100 scored questions to pass. There's no separate scaled-score conversion to worry about, and the unscored experimental questions don't count toward or against that total.

That simplicity is deceptive, though. A 70% passing threshold across nine separate content domains means you can't specialize in the areas you find comfortable and coast through the rest. If gas piping calculations terrify you and you skip that domain entirely, you may need near-perfect performance everywhere else just to reach 70% - an unrealistic strategy on a 240-minute exam covering this much material.

Domain Weighting and Where Points Live

The 100 scored questions are distributed across nine official content domains, and they are not weighted equally. According to the official allocations, Gas Appliances and Piping is the largest domain, followed by Drain, Waste, and Vent Systems and Backflow Prevention. That ordering alone should shape how you allocate study time, because a handful of heavily tested domains carry a disproportionate share of the 100 questions.

The remaining six domains - Plumbing Fundamentals and Safety, Materials Uses and Specifications, Traps Interceptors and Backwater Valves, Plumbing Fixtures Fixture Fittings and Plumbing Appliances, Water Supply Systems, and Plumbing Mathematics - still carry real point value and cannot be ignored. For a complete breakdown of every domain with study priorities, read MD-JP Exam Domains 2026: Complete Guide to All 9 Content Areas.

What the May 2026 Pass Rate Actually Tells You

The Maryland Board's June 18, 2026 minutes reported that 27 of 63 candidates passed the Journey Plumber/Gas Fitter exam in May 2026 - a pass rate of 43% for that specific monthly cohort. It's important to read this number correctly: it's a single-month snapshot, not an annual figure, and it doesn't distinguish first-time test-takers from repeat candidates.

Still, a sub-50% monthly pass rate is a meaningful signal. It tells you the 70% passing score is a genuine filter, not a formality, and that a large share of candidates in any given cycle fall short. Treating your prep casually because "it's just a licensing test" is a mistake many of those 36 unsuccessful candidates likely made. For more context on how this figure fits into the exam's overall difficulty profile, see MD-JP Pass Rate 2026: What the Data Shows.

Retake Rules if You Fall Short

If your score lands below 70%, Maryland allows you to retest, but not immediately - candidates must wait and may retake the exam once per 30 days. That waiting period is your built-in study window; use it deliberately rather than simply rescheduling and hoping for a better result on the same preparation.

On the other end, once you do pass, don't let the clock run out on licensure: you must apply for the license within one year of the passing examination date. Missing that window can mean your passing score no longer counts toward licensure, forcing you to retest from scratch. For a full walkthrough of eligibility rules, apprenticeship hours, and the 32-hour backflow course requirement, see MD-JP Requirements 2026: Eligibility, Prerequisites & How to Qualify. For scheduling specifics and testing windows, check MD-JP Exam Dates 2026: Testing Windows, Deadlines & Scheduling.

How Open-Book Rules and Your Calculator Affect Scoring

The Journey Plumber/Gas Fitter exam is open-book, but strictly on the Board's terms. You're allowed approved references with permanent tabs and highlighting only - handwritten notes, loose papers, and outside study guides inserted into your code books are prohibited. This matters directly for your score: if an inspector confiscates unauthorized materials or you're caught relying on notes that aren't allowed, you risk disqualification regardless of how many answers you got right.

Your calculator is similarly restricted. It must be silent, nonprinting, and nonprogrammable, with no alphabetic keyboard. Domain 9, Plumbing Mathematics, along with pipe-sizing calculations in Water Supply Systems and DWV, will require quick, accurate arithmetic - so test your permitted calculator ahead of time rather than discovering its limitations mid-exam.

Because the reference editions matter for accuracy, and the Board's June 2026 minutes flag an ongoing code-edition update, always verify the current assigned references directly with PSI before you invest in study materials. Getting this wrong doesn't just waste money - it can cost you points on code-specific questions.

A Domain-Ordered Study Timeline

Generic study techniques only help if they're pointed at the right targets. Given the domain weighting, a study sequence that front-loads the heaviest-tested material makes more sense than working through the nine domains in numerical order.

For a more detailed week-by-week methodology, including how to structure review sessions and practice testing, see MD-JP Study Guide 2026: How to Pass on Your First Attempt. A condensed, one-page reference for last-minute review is available at MD-JP Cheat Sheet 2026: One-Page Review of Must-Know Facts. You can also build your test-day comfort with realistic questions on our practice test platform before you sit for the real thing.

Who Actually Needs This Score

The 70% passing score isn't an academic exercise - it's the gate between apprenticeship and independent journeyman status. Employers across residential, commercial, and gas-fitting sectors in Maryland hire based on this license, and WSSC and Baltimore County maintain their own separate licensing arrangements worth checking if you work in those jurisdictions. If you're weighing whether pursuing this credential is worth the study hours and fees, compare the investment against outcomes in Is the MD-JP Certification Worth It? Complete ROI Analysis 2026 and MD-JP Salary Guide 2026: Complete Earnings Analysis. For a broader look at hiring trends after licensure, see MD-JP Jobs.

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