Plumber License Requirements in Montana
| Licensing Authority | Montana Board of Plumbers (MBP) |
| License Type | Journeyman / Master Plumber |
| Experience Required | Journeyman: 4 years of legally obtained experience under a licensed plumber. Master: 4 years as licensed journeyman with 3 years supervisory experience, OR 9 years of verified experience. |
| Exam Required | Yes — Montana Plumber Exam |
| Bond Required | No |
| Insurance | General liability: recommended. Workers comp: required with employees |
| Continuing Education | 16 hours every 2 years |
| Processing Time | 2-4 weeks |
Fee Breakdown
| Application Fee | $270 |
| Master plumber application | $380 |
| Est. Initial Total | $650 |
Renewal: $270 every 2 years
Exam Requirements
Montana Plumber Exam
Pass: 70%
Uniform Plumbing CodePlumbing systemsMontana plumbing regulations
License Tiers
Journeyman Plumber
4 years (8,000 hours) under licensed plumber
Exam: Required
Master Plumber
4 years as licensed journeyman with 3 years supervisory, OR 9 years total verified experience
Exam: Required
License Reciprocity
This state has reciprocity agreements with 2 states. You may be able to skip the trade exam if you hold a valid license from one of these states.
oregonReciprocal journeyman plumber and electrician licenses accepted
idahoReciprocal journeyman plumber and electrician licenses accepted
Frequently Asked Questions
Do I need a plumber license in Montana?
Yes, Montana requires a statewide plumber license through the Montana Board of Plumbers.
How much does a plumber license cost in Montana?
The estimated initial cost is $270, including application, exam, and license fees.
Data last verified: 2026-04-02 | Source: MBP