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 |
| Est. Initial Total | $270 |
Related & additional fees
Separate or ongoing costs — not included in the estimate above.
| Master plumber application | $380 |
Renewal: $270 every 2 years
Exam Requirements
Montana Plumber Exam
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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. View full reciprocity details — You may be able to skip the trade exam if you hold a valid license from one of these states.
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.
What experience do I need for a plumber license in Montana?
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.
What exams are required for a plumber license in Montana?
You must pass the Montana Plumber Exam exam. A passing score of 70% is required.
Does Montana have plumber license reciprocity?
Yes, Montana has reciprocity agreements with 2 states that may apply to plumbers. Licensed contractors from these states may be eligible to skip certain exams or have an expedited application process.
How long does it take to get a plumber license in Montana?
Processing time is typically 2-4 weeks after submitting a complete application.
Is continuing education required for plumbers in Montana?
Yes, 16 hours per every 2 years is required for license renewal.
Next steps
You know the requirements for plumbers in Montana— here's how to actually pass and apply.
Data last verified: 2026-04-02 | Source: MBP