Montana · Plumbing licensing

How to Get a Plumbing License in Montana (2026 Guide)

Verified against 10 official sourcesReviewedNext review·Confidence: medium
State license
Required (state)
Renewal
$160 Journeyman / $265 Master (annual, expires Sept 1)

Montana PLUMBING overview

Quick facts

Tiers
Info
Master / Journeyman / Apprentice
Master experience
Required
4 yrs as licensed journeyman + 3 yrs with master / supervisory
Journeyman experience
Required
5 yrs / 7,500 hrs (or registered apprenticeship)

Navigating the path to becoming a licensed plumber in Montana requires understanding the specific requirements set by the Montana Board of Plumbers for its distinct license tiers: Master Plumber, Journeyman Plumber, and Plumber Apprentice. This guide provides a detailed, step-by-step roadmap for each license type, with all requirements and fees sourced directly from official state regulations.

Do You Need a Plumber License in Montana?

Yes, a state-issued license from the Montana Board of Plumbers is required to perform plumbing work in Montana. The state mandates licensing to ensure that all plumbing installations and repairs meet established safety and public health standards, protecting consumers and upholding the integrity of the trade.

Montana Plumber License Types and Tiers

The Montana Board of Plumbers issues three primary classifications for individuals in the plumbing trade.

  • Master Plumber: This license allows an individual to plan, lay out, supervise, and perform all plumbing work. Master Plumbers can also operate a plumbing business and employ Journeyman and Apprentice plumbers.
  • Journeyman Plumber: This license authorizes an individual to install and perform plumbing work under the direction of a licensed Master Plumber.
  • Plumber Apprentice: An individual must register as an apprentice to legally work in the trade under the direct supervision of a licensed Journeyman or Master Plumber while gaining the experience necessary for licensure.

How to Get a Montana Journeyman Plumber License

To become a licensed Journeyman Plumber in Montana, you must document sufficient field experience, pass a state-approved examination, and submit a complete application to the Board of Plumbers.

Journeyman Plumber Experience Requirements

An applicant for a Journeyman Plumber license in Montana must demonstrate either a verified record of legally obtained work experience or completion of a formal apprenticeship. According to MCA § 37-69-304 and ARM 24.180.504, the two primary pathways are:

  • Work Experience: A minimum of 7,500 aggregate hours of experience in the field of plumbing obtained over a period of at least five years. This experience must be in a major phase of the plumbing business and verified by time or pay records.
  • Apprenticeship: A copy of an apprenticeship completion certificate from a program meeting the standards set by the U.S. Department of Labor or a recognized state apprenticeship agency.

Journeyman Plumber Examination Details

All candidates for a Journeyman Plumber license must pass a board-approved examination requiring a passing score of 70% or better, per MCA § 37-69-306. After the Board approves your application, you receive an admission letter to schedule the exam with IAPMO, the Board's examination vendor, which sets the examination fee directly.

Journeyman Plumber Application Process

  1. Meet Experience Requirements: Accumulate and document the required 7,500 hours of experience over five years or complete a registered apprenticeship program.
  2. Pass the Examination: Schedule and pass the Montana Journeyman Plumber examination with a score of 70% or higher.
  3. Complete the Application: Fill out the official application for a Journeyman Plumber license provided by the Montana Board of Plumbers.
  4. Gather Documentation: Collect all necessary supporting documents, including verification of your experience or apprenticeship certificate and proof of your passing exam score.
  5. Submit and Pay Fee: Submit the completed application package along with the nonrefundable application fee of $270.

How to Get a Montana Master Plumber License

Obtaining a Master Plumber license requires holding a Journeyman license for a specified period and gaining additional supervisory or advanced experience before passing the Master Plumber examination.

Master Plumber Experience Requirements

To qualify for a Master Plumber license in Montana, you must meet the experience criteria outlined in MCA § 37-69-305. Applicants must provide evidence of:

  • Four years of experience as a licensed Journeyman Plumber, verified by time or pay records.
  • Three years of concurrent experience working with a licensed Master Plumber or in a supervisory capacity in the plumbing business.

Master Plumber Examination Details

Candidates must pass the Montana Master Plumber examination with a score of 70% or better. The exam is administered by IAPMO, the Board's approved vendor; after Board approval you receive an admission letter to schedule the exam with IAPMO, which sets the examination fee.

Master Plumber Application Process

  1. Meet Experience Requirements: Hold a Journeyman Plumber license for at least four years and gain three years of concurrent supervisory experience.
  2. Pass the Examination: Schedule and pass the Montana Master Plumber examination with a score of 70% or higher.
  3. Complete the Application: Fill out the official application for a Master Plumber license.
  4. Gather Documentation: Assemble proof of your Journeyman license, documentation verifying your supervisory experience, and your passing exam score report.
  5. Submit and Pay Fee: Submit the completed application and supporting documents with the nonrefundable application fee of $380.

Montana Plumber Apprentice Registration

Individuals new to the trade must register as a Plumber Apprentice with the state to legally work and accrue experience hours. Apprentices must work under the direct supervision of a licensed Journeyman or Master Plumber at all times. The specific registration process and any associated fees are set by the Board of Plumbers; confirm current details directly with the board before starting work.

How Much Does a Plumber License Cost in Montana?

The total cost to get a plumber license in Montana includes application fees, examination fees, and renewal fees, which vary by license type. Per the Montana Board of Plumbers fee schedule (ARM 24.180.401), all fees are nonrefundable.

  • Application Fees:
    • Journeyman Application Fee: $270
    • Master Application Fee: $380
    • Out-of-State Application Fee: $400
    • Medical Gas Endorsement Application Fee: $100
    • Provisional License Fee: $100
  • Examination Fee:
    • Board-Administered Examination/Reexamination: $400 (Note: Fees for exams administered by third-party vendors are set by the vendor).
  • Renewal Fees (Annual):
    • Journeyman Renewal: $160
    • Master Renewal: $265
    • Medical Gas Endorsement Renewal: $30
  • Other Fees:
    • Master Plumber of Record: $50
    • Continuing Education Provider: $50
    • Continuing Education Course: $25
    • Retirement Status Certificate: $25

Montana Plumber License Renewal Requirements

Montana Master and Journeyman Plumber licenses expire annually on September 1 and must be renewed each year to remain active. The renewal fee for a Journeyman license is $160, and the fee for a Master license is $265. The renewal cycle for Plumber Apprentice registrations is set by the board; contact the Montana Board of Plumbers for current apprentice renewal requirements.

Montana Plumber Continuing Education (CE) Requirements

Yes, licensed Journeyman and Master Plumbers in Montana are required to complete four hours of code-related continuing education annually. To be accepted for renewal, all CE courses must receive prior approval from the Montana Board of Plumbers. Licensees are responsible for ensuring their chosen courses are board-approved before enrolling.

Montana Plumber License Reciprocity and Endorsement

Montana does not have broad reciprocity agreements for plumbing licenses with other states. Applicants with an active license from another state may apply through the out-of-state application process, which has a nonrefundable fee of $400. The Board of Plumbers evaluates these applications on a case-by-case basis to determine if the applicant's experience and qualifications are substantially equivalent to Montana's standards. Contact the board directly to inquire about a specific endorsement path.

Insurance and Bonding for Montana Plumbers

The Montana Board of Plumbers does not impose a uniform statewide bonding requirement for licensure itself. However, liability insurance and surety bonds are commonly required by local jurisdictions (cities and counties) as a condition for obtaining building permits or registering a business.

How to Verify a Montana Plumber License

You can verify the status of a Montana plumber's license through the public lookup portal on the Montana Department of Labor & Industry's website. This tool allows consumers and contractors to confirm that a plumber's license is active and in good standing with the Board of Plumbers.


Requirement

Montana Insurance & Bond Requirements

Montana does not impose a uniform statewide bond for the plumbing license itself; liability insurance is typically required by local building permit requirements. Confirm with the Montana Board of Plumbers.

Always confirm current coverage and bond minimums with the issuing authority before purchasing a policy.

Montana Plumbing licensing

Common questions

Do you need a license to do Plumbing work in Montana?

Yes. Montana requires a state-issued Plumbing contractor license to perform Plumbing work. Per MCA § 37-69-304 (Journeyman plumber): a specific record of 5 years of legally obtained experience in the field of plumbing, fulfilled by working 5 years in a major phase of the plumbing business (verified by time or pay records) or completing an apprenticeship program meeting the standards set by the department or the U.S. Department of Labor bureau of apprenticeship. Per ARM 24.180.504 (law.cornell.edu mirror of the MT admin code), a minimum of 7,500 aggregate hours of experience in the field of plumbing over a period of not less than five years; or a copy of an apprenticeship completion certificate issued by the U.S. Department of Labor/ETA/OATELS or a recognized state apprenticeship agency. Per MCA § 37-69-305 (Master plumber): evidence of 4 years of experience as a licensed journeyman plumber, verified by time or pay records, plus 3 years of concurrent experience working with a licensed master plumber or in a supervisory capacity. For both tiers, 1 year of experience is 1,500 hours or more of work in a continuous 12-month period per § 37-69-305(2).

How much does an Plumbing license cost in Montana?

Per Mont. Admin. R. 24.180.401 (law.cornell.edu mirror of the MT admin code, the Board of Plumbers fee schedule): Journeyman application fee $270, Master application fee $380, Medical gas endorsement application fee $100, Out-of-state application fee $400. Renewal fees: Journeyman $160, Master $265, Medical gas endorsement $30. Other fees: board-administered examination/reexamination $400, provisional license $100, master plumber of record $50, continuing education provider $50, continuing education course $25, retirement status certificate $25. All fees are nonrefundable per ARM 24.180.401(3). Additional standardized fees are specified in ARM 24.101.403.

How often do you renew an Plumbing license in Montana?

Annual — Montana Master and Journeyman plumber licenses expire annually on September 1 (per the Board of Plumbers license application). Confirm the apprentice-registration cycle with the Board of Plumbers.

Does a Montana Plumbing license transfer to other states?

Montana does not have a broad reciprocity arrangement; confirm any endorsement path with the Montana Board of Plumbers. ARM 24.180.401 lists an 'Out-of-state' application fee of $400 for non-resident applicants.

Frequently Asked Questions

How do I become a licensed plumber in the State of Montana?

To become a licensed plumber in Montana, you must first register as an apprentice, then gain the required experience (at least 5 years and 7,500 hours for a Journeyman), pass a state-approved exam, and submit an application with the appropriate fee to the Montana Board of Plumbers.

What types of plumbing licenses are available in Montana?

Montana offers three main classifications: Plumber Apprentice (registration), Journeyman Plumber, and Master Plumber. Each has distinct experience requirements and a defined scope of work.

What are the experience requirements for a Journeyman plumber license in Montana?

Applicants for a Journeyman license need a verified record of at least 7,500 hours of legally obtained experience over a minimum of five years, or a certificate of completion from a registered apprenticeship program, as specified in ARM 24.180.504.

What are the experience requirements for a Master plumber license in Montana?

To qualify for a Master Plumber license, you must have at least four years of experience as a licensed Journeyman Plumber, plus three years of concurrent experience working with a licensed Master or in a supervisory capacity, per MCA § 37-69-305.

Do I need to register as a Plumber Apprentice in Montana?

Yes, individuals who are not yet licensed as a Journeyman or Master must register as an apprentice to legally work in the plumbing trade and accumulate experience hours under supervision.

How much does it cost to get licensed as a plumber in Montana?

The initial application fee set by the board is $270 for a Journeyman license and $380 for a Master license. This does not include separate fees for the required examination, which are set by the testing vendor.

Are application fees for a Montana plumber license refundable?

No, according to the Montana Board of Plumbers fee schedule (ARM 24.180.401), all application and renewal fees are nonrefundable.

How often do I need to renew my Montana Plumber License?

Journeyman and Master Plumber licenses in Montana expire annually on September 1 and must be renewed each year.

Are there continuing education requirements for plumbers in Montana?

Yes, licensed Journeyman and Master plumbers in Montana must complete four hours of board-approved, code-related continuing education each year to be eligible for license renewal.

Does Montana offer reciprocity for plumbing licenses from other states?

Montana does not have formal reciprocity agreements with other states. Out-of-state applicants may apply for licensure by endorsement, and the Board of Plumbers will review their qualifications to see if they are equivalent to Montana's standards. The out-of-state application fee is $400.

Can I own my own plumbing business if I am not a plumber in Montana?

The specific regulations for business ownership are set by state law and the Board of Plumbers; typically, a plumbing business must have a licensed Master Plumber of Record to oversee all plumbing operations. Confirm current requirements with the Board of Plumbers and the Montana Secretary of State.

How do I get a Plumbing Permit in Montana?

Plumbing permits are generally issued by local city or county building departments, not the state licensing board. You must contact the building authority in the jurisdiction where the work will be performed to apply for a permit.

How Montana compares

Montana vs. other state licensing rules

Use this quick comparison to jump to nearby state requirements or see where rules differ.

StateLicenseClassesExamRenewal
Montana This guideRequired3 classesRequired$160 Journeyman / $265 Master (annual, expires Sept 1)
AlabamaRequired5 classesRequiredAnnual
AlaskaRequired3 classesRequiredEvery 2 years
ArizonaRequired3 classesRequiredEvery 2 years
ArkansasRequired5 classesADH-administered (monthly at ADH Auditorium)Annual (Dec 31, late fee $5/mo after Feb 1)

Next step

Prepare for your Montana PLUMBING license

Trade-specific exam prep courses and practice tests.

Compare exam prep (coming soon)

Official sources

Next source review due 2026-12-23. Last reviewed 2026-06-23. Confirm current requirements with the official licensing authority before applying.