Licensing Guides
Montana Plumbing License: How to Become a Plumber in Montana
Plumbing, MT
Table of Contents
Benefits of Getting a Plumbing Contractors License in Montana
How Much Does It Cost to Get a Plumbing Contractor License in Montana?
How Long Does it Take to Get a Plumbing Contractors License in Montana?
Does My Montana Plumbing Contractors License Work in Any Other State?
What Are the Reciprocity Requirements for a Plumbing License in Montana?
What Are the Penalties for Unlicensed Plumbing Work in Montana?
You can’t rush through the training it takes to become a plumber, but that time and effort can lead to a career that is long-lasting, lucrative, and fulfilling. Almost every state requires plumbers to be licensed because it’s complicated work that affects the health and safety of our society.
According to the U.S. Bureau of Labor Statistics, there are 504,500 plumbers nationwide, and Montana employs 1,810 of them. The national number is projected to grow 5% from 2024 to 2034, adding 44,000 plumbers to the ranks across the country. In Montana, according to CareerOneStop, the U.S. Department of Labor’s job search website, the projected growth rate is much higher, at 23% for plumbers, pipefitters, and steamfitters.
Contractors struggle to find skilled tradesmen like plumbers, electricians, and HVACR or mechanical professionals while the demand for them continues to grow. According to the Associated General Contractors of America, “Construction employment in Montana in July 2025 totaled 38,300, an increase of 600 (1.6%) from July 2024 and an increase of 7,400 or 24% from February 2020.”
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Licensing requirements for plumbers vary from state to state and, in some cases, from municipality to municipality. Montana has strict, statewide standards for working in the plumbing business beginning at the apprentice level.
Licensing Requirements for Plumbers in Mississippi
Is a license required for plumbers in Montana? Yes. The Big Sky state requires licensure at the journeyman and master levels.
Montana licenses plumbers at the state level through the Montana Department of Labor & Industry, Business Standards Division. Specifically, the Montana Board of Plumbers licenses and regulates the industry.
While there is no contractor license, plumbing contractors must be registered with the state.
Types of Plumbing Licenses in Montana
What are the plumbing license types in Montana? There are two types of plumbing licenses in Montana:
Journeyman: Performs installations, maintenance, and repairs on plumbing systems.
Master: Oversees and performs installations, maintenance, and repairs on plumbing systems. This license is required to pull permits and engage in and advertise as a plumbing business.
Each license has specific requirements that must be met to qualify for licensure.
LICENSE REQUIREMENTS:
Journeyman License
Document at least five years (7,500 hours) of experience in the field of plumbing, or complete an apprenticeship program that meets Montana Registered Apprenticeship Program standards or U.S. Department of Labor Apprentice standards. Related education can count toward two years of the experience requirement.
Complete and submit an application with applicable fees.
Pass both the journeyman written and practical examination with a score of 70% or higher on both parts.
Master Plumbing License
Document four years of legally obtained experience as a licensed journeyman with three of the years working either in a supervisory capacity or with a licensed master plumber, or document nine years of experience verified by notarized statements or letters.
Pass the Montana Master Plumber examination with a grade of 70% or higher.
Complete and submit an application with applicable fees.
Plumbing Contractor
An individual who wishes to be a plumbing contractor must hold a master level license and also be registered as a contractor with the Montana Department of Labor and Industry. Contractors must apply for either Construction Contractor Registration (CCR) or an Independent Contractor Exemption Certificate (ICEC). The CCR requires proof of workers’ compensation insurance if you have any employees. The ICEC is for sole proprietors who do not have employees and wish to take contract work and not be bound by Montana’s workers’ compensation laws, opting out of coverage for themselves.
Steps to Get a Plumbing Contractor License in Montana
Typically be at least 18 years old and have a high school diploma or GED equivalent unless beginning as a high school student through a Career and Technical Education program.
Must enroll in a Montana Registered Apprenticeship or a U.S. Department of Labor Apprenticeship, or work under the supervision of a licensed master plumber.
Complete registered apprenticeship or document at least five years (7,500 hours) of experience in the field of plumbing (up to two years of experience can be accepted for accredited trade school experience).
Apply to the Board to take the Montana Journeyman Plumber examination and pass with a grade of 70% or higher.
Pay $270 application fee and provide all documentation including Experience Verification Affidavit and Verification of Licensure and/or copy of Apprenticeship Completion Certificate.
Upon approval from the Board, pay a testing fee and pass the plumbing exam to be awarded your journeyman level license.
Work indefinitely as a licensed journeyman by completing continuing education and renewing annually. Or:
Document four years of legally obtained experience as a licensed journeyman with three of the years in a supervisory capacity or with a licensed master plumber, or document nine years of experience verified by notarized statements or letters.
Apply to the Board to take the Montana Master Plumber examination.
Pay $380 application fee and provide all documentation, including Experience Verification Affidavit and Verification of Licensure.
Upon approval from the Board, pay a testing fee and pass the Master Plumber exam with a grade of 70% or higher.
If you wish to own your own plumbing contracting business, register as a contractor with the Montana Department of Labor and Industry and provide proof of workers’ compensation insurance coverage or apply for the independent contractor exemption certificate if you will not have any employees. Register your business with the Secretary of State’s Office, and pay all related fees.
Benefits of Getting a Plumber’s License in Montana
There are many benefits to getting your Montana plumbing license:
Most important, it is required by law in Montana to be licensed through the state to perform plumbing work without supervision.
A trade license is proof of your experience and skill.
Only licensed master plumbers can: operate a business and advertise services, obtain commercial insurance, pull building permits and pass inspections, and bid on public and government projects.
Having a license protects your company and customers.
A license gives you a competitive advantage in the job market and increases your earning potential as you acquire more experience.
What Is the Mean Wage for a Plumber in Montana?
The annual mean wage for a plumber in Montana is $73,120, according to the U.S. Bureau of Labor Statistics. However, that salary can increase as you acquire more experience. A plumbing salary database, shared with ServiceTitan by Payscale.com, projects the median plumber salary will increase nationally in 2025 by 3.65% for entry-level workers, and 3.55% for both intermediate and senior level plumbers. In Montana, those salary projections are:
Entry (<2 years): $50,600
Intermediate (2-4 years): $65,700
Senior (4-7 years): $71,200
Salaries can vary widely depending on the city where you work and other factors like education, certifications, additional skills, and the number of years you have spent in your profession.
What Business Owners Need to Know
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How Much Does It Cost to Get a Plumbing Contractor License in Montana?
It can cost very little to get started as a plumber in Montana. If you figure out this is your intended path while you’re still in high school, you can begin free of charge as a high school student through the Career Technical Education System.
If you have graduated from high school, you will need to find an apprentice position or program. There are apprenticeships through the local unions like UA Local 30 out of Billings, UA Local 41 out of Butte, or UA Local 459 out of Missoula. Or you can find a job with a plumbing contractor who is willing to sponsor you in a Montana Registered Apprenticeship. As an apprentice working for a private employer or a union job, you will be working full-time and earning money while you are trained, with increases as you learn more until you are making a full journeyperson wage. You may have to pay for classes, or your apprentice sponsor may cover those costs for you.
Eventually, after meeting the eligibility requirements, you’ll need to pay an application by examination license fee of $270 to the Board of Plumbers and pay $175 for the written and $75 for the practical exam to the testing agency, IAPMO (International Association of Plumbing & Mechanical Officials). After acquiring the additional four years of experience as a licensed journeyman, you can apply for a master plumber license by examination, pay $380 to the board, and the test through IAPMO for $175.
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How to Get a Plumbing License in Montana
Becoming a plumbing professional in Montana isn’t fast, but it’s very straightforward. To enter the plumbing field you need to learn and gain work experience. Montana offers a few options to meet the rigid requirements to test for state licensing. Either learn on-the-job working for a master plumber for at least five years and 7,500 hours of experience, complete a registered apprenticeship, or get a degree from an accredited trade school to count as two years of the required experience, then work for three more with a licensed plumber to meet the five-year threshold before taking the state-mandated written and practical exam.
APPRENTICESHIP/WORK EXPERIENCE: A combination of classroom instruction and hands-on training are the two components of any U.S. Department of Labor Registered Apprenticeship, and a Montana Registered Apprenticeship meets these standards. Apprenticeships are sometimes referred to as “The Other Four-Year Degree,” because it’s like college for the trades. You can apply for one of the coveted apprentice openings through your local United Association Union of Plumbers, Fitters, Welders, & Service Techs. Montana has three UA local chapters: UA Local 30, UA Local 41, and UA Local 459. They offer apprenticeships for plumbing, HVACR, steamfitting, and welding. The apprenticeships are five-year programs in which apprentices are mentored on the job by journeymen and go to school to learn trade-specific subjects.
The Montana Registered Apprenticeship website offers apprenticeship information to job seekers as well as employers to help apprentices find openings and help employers find apprentices. The site includes a list of current registered apprenticeship programs, and among them are hundreds of plumbing openings. Many employers will also sponsor you in an apprenticeship or provide you with the opportunity to get that minimum five years of experience under the guidance of a master plumber. You can seek them out through job boards like Indeed and ZipRecruiter in addition to the state apprentice website.
EDUCATION/WORK EXPERIENCE: You can also attend an accredited trade school. Montana State University Northern offers a Plumbing Technology Associate of Applied Science degree (Plumbing AAS) and also a Plumbing Certificate. Up to two years of trade school can count toward your experience requirement for licensing.
APPLY FOR JOURNEYMAN EXAMINATION: Once you’ve met the education/experience requirement, you will need to apply to the board to take the Montana Journeyman Plumber examination. You will need to send the application along with all of the supporting documentation — Experience Verification Affidavit and Verification of Licensure and/or copy of Apprenticeship Completion Certificate — and the application by examination fee of $270. Checks or money orders should be made payable to the Montana Board of Plumbers. Apply online or mail the completed application to:
Montana Board of Plumbers P.O. Box 200513 Helena, MT 59620-0513
The board provides a checklist for licensing and application requirements.
TAKE AND PASS EXAMINATIONS: The Montana Board of Plumbers has contracted with IAPMO to conduct testing. Once you are notified by the State Plumbing Board that you are approved to test, you must pay $175 for the written portion of the exam and $75 for the practical, and pass with a grade of 70% or higher on each. Once you are licensed as a journeyman plumber, you may practice indefinitely as long as you keep your license current by completing continuing education and renewing annually.
WORK EXPERIENCE/APPLY FOR MASTER EXAMINATION: After working as a licensed journeyman plumber for four years, with three of those years either in a supervisory capacity or with a licensed master plumber, or documenting nine years of experience verified by notarized statements or letters, you may apply to sit for the Master Plumber examination. The Master Plumber application details the procedure, which is similar to the Journeyman application. You will need to send it along with all of the supporting documentation — Experience Verification Affidavit and Verification of Licensure — and the application by examination fee of $380. There’s a checklist for the Master Plumber application as well. Once you are notified by the Board that you are approved to test, you must pay $175 for the master exam. Once you are licensed as a master plumber, you may practice indefinitely as long as you keep your license current by completing continuing education and renewing annually.
CONSIDER BECOMING AN INDEPENDENT CONTRACTOR: If you wish to own your own plumbing contracting business, you need to register as a contractor with the Montana Department of Labor and Industry. If you intend to work alone and not hire any staff, you can apply for an Independent Contractor Exemption Certificate (ICEC) and waive the workers’ compensation coverage. If you plan to have employees, you must obtain a Construction Contractor Registration (CCR) and provide workers’ compensation insurance coverage for your employees as required under the Montana Workers’ Compensation Act.
You will need to complete and submit an application form with a non-refundable $70 fee to the Department of Labor and Industry for your CCR, or submit the ICEC application with a $125 fee. Applications must be mailed to:
Montana Department of Labor & Industry Registration Section P.O. Box 8011 Helena, MT 59604-8011
You can enclose a check for the amount due payable to the Montana Department of Labor & Industry (DLI), or you can submit your payment online.
You will also need to register your business through the Montana Secretary of State website and pay the business registration fees.
How Long Does it Take to Get a Plumbing License in Montana?
It will take at least five years to complete an apprenticeship or get the requisite work experience to get approval from the Board to take the Journeyman Plumber examination. To become licensed as a master plumber, it will take another four years before you qualify to sit for that exam.
The great news is that as an apprentice you begin earning a wage from the very beginning and that compensation goes up each year as you acquire more training and knowledge until you are fully licensed at the journeyperson level. Then it goes up again when you acquire your master license. As a licensed contractor you can be your own boss and grow your business as much as you want.
Montana Plumber Training Programs and Schools
Plumbers are responsible for a lot more than just fixing leaks or clogs. They design, install, and renovate systems that carry liquids or gasses, so they must know all of the mechanics that go into that. They also must know plumbing code.
Montana encourages aspiring plumbers to get the training they need through a traditional apprenticeship model that combines classroom education with on-the-job mentoring by a licensed journeyman or master. However, the state allows you to count up to two years of college education toward the required five years of experience. Therefore you may begin your plumbing journey at an accredited trade school or you may choose to pursue a four-year engineering degree before you start getting the required additional hands-on experience.
There are currently three trade schools accredited by the Montana Board of Plumbers — North Dakota State College of Science in Wahpeton, Montana State University Northern in Havre, and Flathead Valley Community College in Kalispell.
The plumbing program at North Dakota State College of Science in Wahpeton is a certificate program that provides theory, code, and hands-on training to prepare students for work in the plumbing field. The program also provides training in blueprint reading, drafting, and electricity, as well as a course that focuses on workplace safety. It is 37 credit hours, and the total cost of the program is estimated at $20,604.56.
Montana State University Northern offers both a Plumbing Associate of Applied Science degree and a Plumbing Certificate through its College of Technical Sciences. The per-credit estimated cost of attendance, tuition, and fees is about $313 for a resident and $933 for out-of-state students. MSU Northern also offers a Related Training correspondence education option for the individual apprentice working for an approved plumbing or electrical firm in Montana. Through the successful completion of these 15 courses, the student can fulfill the education requirements of their plumbing or electrical apprenticeships. The courses are recognized by the State of Montana Department of Labor and Industry, Apprenticeship Training Program. Once you have passed all the courses and completed your journeyman exam, MSU-Northern can grant up to one year credit toward your associate’s degree.
If you choose to get a four-year degree before pursuing a plumber's license, there are many colleges and universities in Montana that offer engineering degrees, including Montana State University, Montana Technological University, and Carroll College.
Apprenticeship: Union and non-union apprenticeships are the ideal training programs to learn the plumbing trade, and it is the path most strongly encouraged in Montana.
The Montana Registered Apprenticeship website is a great resource with its list of current registered apprenticeship programs. There are hundreds of plumber apprentice openings on the site. Of course, the United Association local chapters in Billings, Butte, and Missoula offer comprehensive formal apprenticeships that will prepare you for the journeyman exam and a career as a plumbing professional.
Tuition: Apprenticeships usually have some upfront costs for books or tools, but the apprentice will be paid a percentage of the journeyman wage rate and will receive periodic wage increases as they meet program requirements. The cost of tuition at a vocational school or college as noted for the schools above can range from a few thousand dollars for an online program or at a community college to tens of thousands of dollars per year at a state or private school.
Program Prerequisites: You must be at least 18 years old and have a high school diploma or a GED and demonstrate mastery of basic high school math. You may also need a driver’s license and a clean driving record.
On-the-Job Experience: While on the job you will need to have good customer service skills, be detail-oriented, have some mechanical capability, and be physically fit because the job can include some heavy lifting and hours of walking, standing, and working in tight spaces.
For more detailed information about plumbing school options in Montana, check out our Ultimate Guide to Plumbing Schools in Montana.
Montana Plumber Licensing Exam Details
The Montana Board of Plumbers has contracted with IAPMO to conduct its testing. You need permission from the Board before you can register for an exam. Specifically, the IAPMO website asks that you wait until the Friday after you receive approval to register for your exam. You have two testing options.
Online proctored exams via IAPMO's FLEX testing platform (click for more information).
In-person exams at physical locations in several cities across the state.
Both the Journeyman Plumber examination and the Master Plumber examination are open-book. You are allowed to bring only an original copy of the Uniform Plumbing Code (2018), a copy of the Montana Amendments to the Uniform Plumbing Code, and a simple, non-scientific calculator into the testing center.
In-person exams will be scheduled in the following cities once or twice per year.
Billings
Bozeman
Butte
Glendive
Great Falls
Helena
Missoula
The Journeyman Plumber practical exam costs $75. The Journeyman Plumber written exam costs $175. The Montana Master Plumber exam costs $175.
The Journeyman written exam includes 100 multiple choice questions that are based on the 2021 Uniform Plumbing Code book as amended and the Statutes and Rules Relating to the Board of Plumbers and Building Codes. There is a 3-hour time limit. The practical examination includes three virtual diagrams and has a 2.5-hour limit.
The Master exam includes 125 multiple choice questions based on the 2021 Uniform Plumbing Code book as amended and the Statutes and Rules Relating to the Board of Plumbers and Building Codes. There is a 3-hour time limit.
A passing score is 70% or higher on each of these exams.
Who Issues Plumber Licenses in Montana?
The Montana Board of Plumbers licenses journeyman and master plumbers. Plumbing contractors must be registered with the Department of Labor & Industry (DLI).
Does My Montana Plumber’s License Work in Any Other State?
Montana has reciprocity agreements for journeyman licensure with Oregon, Idaho, North Dakota, and South Dakota. This means you’ll have a streamlined application process in those states.
What Are the Reciprocity Requirements for a Plumbing License in Montana?
Again, Montana has reciprocal agreements with four states — Oregon, Idaho, North Dakota and South Dakota — for journeyman licensure. This means you can skip the exam requirement as long as your out-of-state license is active with no current complaints filed against it.
Applicants who do not qualify for reciprocity will be required to sit for the examinations. There is no reciprocity offered for master plumber licenses.
Plumbing Certifications
Other certifications can help you demonstrate your proficiency to potential employers and clients. National Inspection Testing and Certification (NITC), International Association of Plumbing and Mechanical Officials (ASSE Certifications) and other professional certifications are not required but may make you a more attractive hire to prospective employers or can increase your marketability to customers.
Other Requirements Unique to Montana
It can take up to 30 days to process your application. If you want a temporary license while you wait to take your exam, you can pay a $100 fee when you submit your application.
Are There Plumbing Scholarships in Montana?
Yes, there are plumbing scholarships available in Montana. They include:
Gianforte Trade and Technology Scholarship: Offers $1,500 per semester for full-time students, or $750 for part-time students, enrolled in technical and trade programs, including plumbing.
Montana State Fund Trade & Industry Scholarship: Awards $4,000 to students pursuing trade fields and focusing on safety.
Northwest Montana United Way Workforce Development Scholarship: Awards $500 to individuals pursuing careers in the trades, which can be used for tools or schooling.
In addition to these scholarships, plumbing students in Montana can explore financial aid opportunities by completing the Free Application for Federal Student Aid (FAFSA). Submitting the FAFSA gives you access to federal grants like the Pell Grant, subsidized student loans, and work-study programs—all of which can help cover tuition, tools, and other training costs. Many Montana community colleges and trade programs also use FAFSA data to award institutional aid or state-based grants.
How Can Someone Verify My Plumbing License in Montana?
Your plumbing license can be verified by potential clients or employees in Montana through the Montana Department of Labor & Industry License Search. Users can search by company name, plumber name, address, or license number.
When Can a Plumbing License Be Suspended in Montana?
A suspended plumber’s license means that the plumber is temporarily prohibited from practicing their trade legally. Some of the common reasons that Montana plumbing licenses can be suspended are:
Work that doesn’t meet Uniform Plumbing Code standards
Inadequate supervision of employees
Aiding unlicensed individuals
Practicing on a lapsed license
Professional incompetence or negligence
Misleading or deceptive practices
Failure to comply with regulations
Note: The information above should not be considered legal advice. For detailed and specific information about Montana plumbing license regulations you can refer to the official Montana Code.
What Are the Penalties for Unlicensed Plumbing Work in Montana?
In Montana, performing plumbing work without a license is a misdemeanor offense, punishable by a fine between $250 and $1,000, imprisonment for up to one year, or both. Each violation constitutes a separate offense.
Continuing Education
Montana requires four hours of continuing education in a board-approved course every year for each active licensee to be eligible for renewal. New licensees are exempt from the CE requirements for their first renewal. Licensees changing from journeyman to master plumber licenses are not exempt from CE requirements. Courses approved by reciprocal states are acceptable. Code-related courses taught by IAPMO are acceptable. Licensees are responsible for maintaining copies of their certificates of completion.
Resources
You can stay up to date on all plumbing industry news in several ways:
Check top plumbing blogs, including ServiceTitan’s blog.
Read about the latest industry trends.
Listen to top plumbing podcasts like ServiceTitan’s “Toolbox for the Trades” podcast.
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