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

The Master Plumber License in Montana must be renewed every 12 months.

How much does it cost to renew a Master Plumber License in Montana?

The renewal cost for a Master Plumber License in Montana is $370.00.

What happens if my Master Plumber License expires in Montana?

Performing plumbing work without a valid license in Montana is a misdemeanor, punishable by a minimum fine of $250 (maximum $1,000) and potential incarceration ranging from 90 days to one year. After the 45-day late renewal window, the license expires and the licensee is considered to be practicing without a license.

Montana renewal guide

Master Plumber License

If this license is up for renewal, this page gives you the fee, the timeline, and the items that usually hold the filing up.

Start here

What matters before you file.

Check the fee, the renewal window, and the documents or insurance records that can slow approval down.

Issuing authority

Montana Board of Plumbers

Renewal period

Every 12 months

Renewal fee

$370.00

Late penalty

$370.00

Bond requirement

Insurance requirement

Continuing education

4 hours

Before you renew

Get the filing straight.

1
Finish the CE first

Complete the 4 required hours before you start the renewal.
2
File with the board

File through Montana Board of Plumbers and pay the $370.00 renewal fee once the supporting proof is ready.
Renew online
3
Leave room for processing

Typical processing time is 30 days, so do not wait until the last minute.

If you miss the deadline, the late penalty is $370.00, with a 45-day grace period.

Detailed notes

The fine print is here.

Montana Master Plumber License

The Montana Board of Plumbers, under the Department of Labor & Industry, issues the Master Plumber license. This license authorizes the holder to plan, design, supervise, and perform plumbing installations and repairs throughout Montana.

What This License Authorizes

Master Plumbers may supervise journeyman plumbers and apprentices, design plumbing systems, and take full responsibility for plumbing installations. They may operate a plumbing business and pull plumbing permits.

Requirements

Must hold a valid Journeyman Plumber license
Additional experience as a journeyman plumber required
Must pass the Master Plumber examination
Application Fee: $100 application fee + $280 license fee ($380 total)

Continuing Education

4 hours of Board-approved continuing education required annually
Must be code-related content
Retain completion certificates for a minimum of 3 years

Renewal Process

Renewal Period: Annual (expires September 1)
Renewal Fee: $370
Late Renewal Fee: $740 (double the renewal fee, postmarked after September 1)
Late Grace Period: 45 days after September 1
After the 45-day grace period, the license expires and the licensee must reapply

Consequences of Operating Without a License

Performing plumbing work without a valid license in Montana is a misdemeanor, with a minimum fine of $250 and maximum of $1,000. Offenders may face incarceration from 90 days to one year.

*Disclaimer: This information is provided for general reference only and does not constitute legal advice. Always verify current requirements directly with the Montana Board of Plumbers.*

Official links