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Home / Plumbers / Montana / License

Montana journeyman plumber license

Journeyman license: what Montana Department of Labor & Industry, Board of Plumbers asks for once you're logging hours.5

7,500hours of supervised work
1 YEARbetween renewals

How many hours do you need for the journeyman license in Montana?

7,500 hours of supervised work, about 4 years full time.3

Journeyman license
7,500 hrs5 years and 7,500 hours of plumbing experience, or a registered apprenticeship completion certificate
Master license
4 yrs4 years as a licensed journeyman, 3 of them in a supervisory capacity or with a master plumber (9 years of experience in all)

Keep your own record of hours, employers and pay stubs. Montana Department of Labor & Industry, Board of Plumbers can ask for proof when you apply.

What is the Montana plumber exam like?

Journeyman needs 70% or better on a written and practical exam, master needs 70% or better on the master exam. The exam is given by IAPMO. Code book: 2021 Uniform Plumbing Code (IAPMO).12

How much does the journeyman license cost?

Montana Department of Labor & Industry, Board of Plumbers lists these fees.3

FeeAmount
Journeyman application by exam$270
Journeyman application by reciprocity$400
Master application by exam$380
Temporary work permit for exam candidates$100

How do you renew it?

1 year. All plumber licenses expire September 1 each year and renewal opens 60 days before.4 Continuing education: 4 code-related hours annually, in courses the board has approved in advance.1

Does a license from another state count in Montana?

Journeyman reciprocity with Oregon, Idaho, North Dakota and South Dakota for active licenses in good standing; no master reciprocity agreements are listed.3

License levels in Montana

Journeyman plumber; master plumber; medical gas endorsement.

Ready to apply?

Applications, exam booking and hour forms are on Montana Department of Labor & Industry, Board of Plumbers's site.

Board license page

More for plumbers in Montana

Sources

  1. Montana Department of Labor & Industry, Board of Plumbers: exam (boards.bsd.dli.mt.gov, 2026-10-27)
  2. Montana Department of Labor & Industry, Board of Plumbers: exam provider (boards.bsd.dli.mt.gov, 2026-10-27)
  3. Montana Department of Labor & Industry, Board of Plumbers: experience (boards.bsd.dli.mt.gov, 2026-10-27)
  4. Montana Department of Labor & Industry, Board of Plumbers: renewal (boards.bsd.dli.mt.gov, 2026-10-27)
  5. Montana Department of Labor & Industry, Board of Plumbers: licensing (boards.bsd.dli.mt.gov, 2026-10-27)