NCPC Pass Rate 2026: What the Data Shows

The Pass Rate Reality for NCPC Candidates

Anyone searching for a headline "NCPC pass rate" number is going to run into a wall: the North Carolina State Board of Examiners of Plumbing, Heating and Fire Sprinkler Contractors does not publish a public first-time pass percentage for the Class I Plumbing Contractor license exam, and PSI, the administering testing agency, does not release candidate-level statistics either. That absence of a published number is itself useful information - it means the safest way to think about your odds is not by chasing a mythical percentage, but by understanding exactly what the exam measures and how the scoring actually works.

What we do know, directly from the Board's exam structure, is more actionable than any single statistic would be anyway: a 70 is required to pass, the exam is split into two distinct sections with two distinct time limits, and the test is open book rather than closed book. Those three facts alone explain most of the variance between candidates who pass on the first try and those who need a second attempt.

If you want a deeper breakdown of exam difficulty beyond scoring mechanics, our companion piece on how hard the NCPC exam really is walks through the qualitative factors - content breadth, open-book time pressure, and the split-exam format - that shape candidate outcomes.

The Two Exams Behind the Numbers

Every NCPC Class I candidate actually sits for two separate computer-based examinations on exam day, and each one is graded independently against the same 70 passing threshold. Understanding this split is the single most important thing you can do before you ever open a study guide, because a strong score on one section does not offset a weak score on the other.

For a full breakdown of exactly what falls inside each of these two content areas, see our complete guide to all 2 NCPC content areas. Treating the two exams as separate study projects - rather than one undifferentiated pile of material - is the most reliable lever candidates have over their own outcome.

What a 70 Actually Requires

A score of 70 sounds straightforward, but it's worth sitting with what that threshold means on a four-hour technical exam versus a 1.5-hour business exam. On the longer Plumbing Contractor section, a 70 means you can afford to miss a meaningful share of questions and still pass - but only if your misses are scattered rather than concentrated in one weak content area, like backflow prevention or venting, where a knowledge gap can compound across multiple related questions.

On the Business and Law section, the shorter time frame means there's less room to "average out" a weak content area with strength elsewhere, simply because there are fewer total questions carrying the score. That makes targeted review of licensing law and contractor obligations disproportionately valuable relative to the time it takes to study.

If you want the exact scoring mechanics broken down further, including how the 70 threshold applies section by section, our dedicated page on the NCPC passing score goes into more detail than we have room for here.

Format Mechanics That Move Your Odds

The open-book format is one of the most misunderstood parts of the NCPC exam, and misunderstanding it is a common reason candidates underperform relative to their actual plumbing knowledge. Both the technical and business exams allow the Board's approved references, and candidates are permitted to use permanent commercial tabs and highlighting inside those references. What is explicitly prohibited is handwritten notes - meaning you cannot bring in your own annotated cheat sheets, marginal notes, or supplemental pages, even inside an approved reference book.

PSI supplies the calculator, pencils, scratch paper, and any examination figures you need on test day, so there's no ambiguity about what materials to bring versus what will be provided. The practical implication is that your reference book's organization - how well you've tabbed it and how quickly you can navigate to a given code section - matters almost as much as your underlying knowledge, because you're working against a hard time limit even with the book open.

This is also where a condensed reference tool earns its keep. Our one-page review of must-know NCPC facts is designed to reinforce the concepts you'll still need to recall quickly even with an open book, since locating the right reference section still requires knowing what you're looking for.

Who Is Actually Sitting for This Exam

The Class I license authorizes plumbing work across all building types, which is why the candidate pool includes both career journeyman plumbers moving into contractor status and tradespeople who've built their hours through a mix of on-site work and formal training. Eligibility requires 4,000 hours of relevant on-site full-time experience, though up to 2,000 of those hours can come from directly related academic or technical training rather than pure field time.

That hybrid path matters for pass-rate discussions because candidates arrive with different balances of hands-on exposure versus classroom exposure, and that balance often predicts which of the two exam sections will feel harder. Candidates with heavier field experience but less formal coursework sometimes find the Business and Law section less intuitive than the technical section, while candidates with more classroom-based training sometimes need extra repetition on field-application questions in the technical exam.

If you're still confirming whether your hours and background meet the Board's threshold before you schedule, our detailed breakdown of NCPC eligibility, prerequisites, and how to qualify is the right starting point before you invest in exam prep.

The 90-Day Retake Rule

Two separate 90-day windows govern the NCPC testing process, and confusing them is a common scheduling mistake. First, once you're approved to test, your authorization to sit for the exam lasts 90 days - if you don't schedule and complete the exam with PSI inside that window, you'll need to re-establish eligibility. Second, if you fail either section, you must wait 90 days before you're eligible to retest.

That second rule is the one with real pass-rate implications. A 90-day gap is long enough that momentum and short-term recall from your first study cycle will fade if you don't have a deliberate re-study plan. Candidates who treat a failed attempt as a diagnostic - identifying exactly which content areas within the Plumbing Contractor or Business and Law exam cost them the most points - tend to convert their second attempt far more reliably than candidates who simply "study everything again" from scratch.

For a full timeline of when exam windows open, how scheduling with PSI works, and what deadlines to track around your 90-day authorization, see our guide to NCPC testing windows and deadlines.

A Study Timeline Built Around the Two Sections

Generic study advice rarely accounts for the fact that NCPC candidates are preparing for two exams with very different time limits and content types on the same test day. The timeline below allocates more weeks to the longer, broader Plumbing Contractor Technical Examination while still giving the Business and Law exam dedicated, uninterrupted attention rather than treating it as an afterthought.

For a more detailed week-by-week study plan with specific resource recommendations, our first-attempt study guide expands on each of these phases. And when you're ready to test your recall under real time pressure, running through our NCPC practice tests is the closest simulation available to the actual PSI testing experience.

Domain Comparison at a Glance

Because both sections carry the same 70 passing threshold but very different time allowances, treating them as equally weighted in your study calendar is a mistake many candidates make. If you're weighing whether the overall investment in preparation and licensing is worthwhile relative to your career plans, our analysis on whether NCPC certification is worth it and our complete pricing breakdown both provide useful context beyond the exam itself.

Frequently Asked Questions