- KY-MP is the Kentucky Master Plumber License Exam, administered by the DHBC Division of Plumbing.
- The exam has two domains only: Written and Chart, each requiring 80% to pass.
- Total testing time is 2 hours 30 minutes; exam fee is $150 per attempt.
- Eligibility needs 2+ years as a journeyman (within the last 5) and 2+ years working under a master.
What KY-MP Certification Actually Is
KY-MP stands for the Kentucky Master Plumber License Exam - the state-administered test that journeyman plumbers in Kentucky must pass to legally hold a master plumber license. This is not a private industry certification or a national credential; it's a regulatory examination created and graded under Kentucky law, specifically KRS Chapter 318 and the associated administrative regulations found in 815 KAR Chapter 2 and 815 KAR Chapter 20.
Passing KY-MP is the gateway to running plumbing jobs as a master, pulling permits, supervising journeymen and apprentices, and operating or being the qualifying tradesperson for a licensed plumbing business in Kentucky. If you're just getting oriented, our overview article What Is KY-MP? and the plain-language breakdown at KY-MP Meaning are good companion reads before you dive into exam mechanics.
Who Administers the Exam
The exam is developed and delivered under the authority of the Kentucky Department of Housing, Buildings and Construction (DHBC), Division of Plumbing. The actual content of the examination is designed by the State Plumbing Examining Committee, a body established under state statute specifically to write and maintain the master and journeyman plumbing exams for Kentucky.
This matters because everything on the exam - every question, every drawing on the chart portion - is pulled directly from Kentucky statute and regulation, not from a generic national plumbing code textbook. DHBC publishes the current 2023 Kentucky State Plumbing Law, Regulations and Code booklet as the primary study reference, and it should be the backbone of your preparation rather than any out-of-state plumbing prep material.
The Two Exam Domains Explained
Unlike many licensing exams that split content into four or five weighted categories, KY-MP has exactly two official portions, both of which must be passed independently. For the full breakdown of every subtopic inside each domain, see KY-MP Exam Domains 2026: Complete Guide to All 2 Content Areas. Here's the short version.
Domain 1: Written
This portion tests your knowledge of plumbing principles alongside the specific legal framework governing plumbing in Kentucky. Expect questions drawn from:
- General plumbing principles and system design logic
- KRS Chapter 318 (the statute governing licensure)
- 815 KAR Chapter 2 (administrative regulations on licensing and practice)
- 815 KAR Chapter 20 (regulations covering examination routes and alternatives)
Domain 2: Chart
The Chart portion is hands-on in a different way: you're given a prepared drawing showing stacks, wastes, vents, and the fixtures connected to them, and you must insert correct pipe sizes throughout the system.
- Main-stack sizing carries the greatest weight in grading - get this wrong and it costs you disproportionately
- Both oversized and undersized pipe entries lose credit, so guessing "bigger is safer" doesn't work
- Because it's a single connected drawing, an early sizing mistake can cascade into related fixture connections
Key Takeaway
Treat the Chart domain as a system-tracing exercise, not a memorization exercise. Practice sizing full stack-to-fixture runs repeatedly rather than isolated pipe-size flashcards.
Eligibility Requirements
Kentucky doesn't let just any journeyman sit for the master exam. The standard eligibility path requires:
- Being at least 18 years old
- Holding a journeyman plumber license for at least two of the preceding five years
- Having at least two years of active experience working under a licensed master plumber
There are also alternative paths defined in 815 KAR 20:030 for engineers and out-of-state applicants. The out-of-state routes still require proof that you passed Kentucky's own journeyman examination - a license from another state alone doesn't substitute. For a full walkthrough of every path and documentation requirement, read KY-MP Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Registration, Fees, and Deadlines
Getting scheduled for KY-MP involves specific paperwork and timing that trips up a surprising number of otherwise-qualified journeymen.
- Exam fee: $150 per attempt
- Application form: PLB-3, the Plumbing Examination Registration Form, which requires a recent passport-sized color photograph
- Deadline: a complete application must be submitted at least three weeks before the examination date
- Exam months: regular sittings occur in February, May, August, and November
One detail that catches candidates off guard: an examination application becomes void if you don't successfully complete the exam within one year of the first notice of examination. On the flip side, once you do pass, that passing score stays valid for three years - useful if you need time to satisfy other licensing paperwork before formally applying for your master license. For the complete cost picture including the license fees below, see KY-MP Certification Cost 2026: Complete Pricing Breakdown, and for a month-by-month look at scheduling, check KY-MP Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
| Item | Detail |
|---|---|
| Exam fee (per attempt) | $150 |
| Application form | PLB-3 (with photo) |
| Application deadline | 3+ weeks before exam date |
| Exam months | February, May, August, November |
| Application validity | Void after 1 year from first exam notice |
| Passing score validity | 3 years |
Passing Score and Time Limits
KY-MP has a straightforward but strict scoring rule: you must score at least 80% on each portion separately - Written and Chart. Scoring 95% on Written doesn't offset a 75% on Chart; both have to independently clear the 80% bar. Total time allotted for both portions combined is 2 hours 30 minutes.
Because the two domains are graded separately, your prep strategy needs to treat them as two distinct exams under one roof rather than a single blended test. For the exact mechanics of how scoring works and what "passing" really requires, see KY-MP Passing Score 2026: Exactly What You Need to Pass. If you're trying to gauge how tough this really is compared to what you're used to, How Hard Is the KY-MP Exam? Complete Difficulty Guide 2026 and KY-MP Pass Rate 2026: What the Data Shows go deeper into that question.
After You Pass: License Fees and Renewal
Passing KY-MP is the exam milestone, but the license itself has its own cost structure that candidates should plan for in advance.
- Master license base fee: $250, with proration for initial terms of seven to eighteen months
- Annual renewal: $250, due at the end of your birth month each year
- Renewal requirements: proof of insurance and six approved continuing education (CE) hours completed in the preceding 12 months
- CE exemption: your very first renewal is exempt from the CE requirement if the initial license was issued within the preceding 12 months
This renewal structure is worth internalizing now, since it affects long-term cost of holding the credential - a topic covered in more detail in Is the KY-MP Certification Worth It? Complete ROI Analysis 2026.
How to Sequence Your Study Time
Because Written and Chart are graded independently and test very different skills - recall versus applied sizing - it makes sense to structure your remaining study weeks around that split rather than reviewing everything in one undifferentiated pile.
Written Foundations
- Work through KRS Chapter 318 and 815 KAR Chapter 2 section by section
- Build a running list of definitions and license-related rules that show up repeatedly
Written Depth + Chart Introduction
- Move into 815 KAR Chapter 20 alternative routes and cross-reference against your eligibility path
- Start practicing basic stack-and-vent sizing drawings, focusing on the main stack first
Chart Mastery
- Run full timed sizing drawings, checking for both oversized and undersized entries
- Mix in review questions from Domain 1 so recall stays sharp while Chart work dominates
If you want a structured, week-by-week walkthrough with practice question sets baked in, KY-MP Study Guide 2026: How to Pass on Your First Attempt expands on this exact approach. And when you're ready for final review, the KY-MP Cheat Sheet 2026: One-Page Review of Must-Know Facts condenses the code references and sizing rules into a single reference page.
Who Needs This Credential
KY-MP certification isn't optional trivia for career advancement - it's the specific legal requirement for anyone in Kentucky who wants to operate as a master plumber, whether that means running your own plumbing company, serving as the qualifying master for a contracting business, or supervising journeymen and apprentices on licensed jobs. Plumbing contractors, mechanical firms, and facilities departments across Kentucky look for this license specifically when hiring for lead and supervisory plumbing roles.
If you're weighing whether the investment of time and the $150 exam fee (plus ongoing $250 renewal costs) pays off relative to staying a journeyman, KY-MP Salary Guide 2026: Complete Earnings Analysis and the ROI piece linked above both dig into that question. For a broader look at what roles open up once you're licensed, see KY-MP Jobs, and for formal preparation courses, KY-MP Training covers structured options.
To actually build exam-day readiness rather than just reading about the domains, running full-length timed practice sessions on our KY-MP practice test platform is the fastest way to find weak spots in both Written recall and Chart sizing before you sit for the real thing. Many candidates use practice exams as their primary gauge of readiness heading into the three-week application deadline.
Frequently Asked Questions
No. KY-MP is a Kentucky-specific state licensing exam administered by the DHBC Division of Plumbing under Kentucky statute. It does not transfer automatically to other states, though out-of-state applicants have a defined alternative route under 815 KAR 20:030.
Two: the Written portion, covering plumbing principles and Kentucky statute/regulations, and the Chart portion, which requires sizing pipes on a prepared stack-waste-vent drawing. Both must be passed at 80% or higher.
Regular examination months are February, May, August, and November. Applications must be submitted at least three weeks before the sitting you're targeting.
Your examination application becomes void if you don't successfully complete the exam within one year of the first notice of examination. You would need to reapply and pay the fee again.
Not necessarily. If your initial master license was issued within the preceding 12 months, your first renewal is exempt from the six-hour CE requirement. After that, six approved CE hours are required within each preceding 12-month period.