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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
| Fee | Amount |
|---|---|
| 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.
Applications, exam booking and hour forms are on Montana Department of Labor & Industry, Board of Plumbers's site.
More for plumbers in Montana
Sources
- Montana Department of Labor & Industry, Board of Plumbers: exam (boards.bsd.dli.mt.gov, 2026-10-27)
- Montana Department of Labor & Industry, Board of Plumbers: exam provider (boards.bsd.dli.mt.gov, 2026-10-27)
- Montana Department of Labor & Industry, Board of Plumbers: experience (boards.bsd.dli.mt.gov, 2026-10-27)
- Montana Department of Labor & Industry, Board of Plumbers: renewal (boards.bsd.dli.mt.gov, 2026-10-27)
- Montana Department of Labor & Industry, Board of Plumbers: licensing (boards.bsd.dli.mt.gov, 2026-10-27)