Plumbing Contractor Permit Requirements in Great Falls, MT

Complete permit and license guide for starting a plumbing contractor in Great Falls, Cascade County, Montana.

Updated 2026-03-15 5 stops $400–$1,200 est. 4–10 weeks to obtain all licenses
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Not legal advice. Requirements may change — always verify with your local government authority before applying. This guide was compiled from public and official sources (last updated ) and has not yet been independently source-verified — confirm each requirement before acting on it.

Federal — start here

1 stop
  1. EIN (Employer Identification Number)

    Required if you have employees or operate as an LLC or corporation. Free from the IRS.

    Official government source

    FreeImmediate (online application)

State of Montana

1 stop
  1. Montana — No Sales Tax

    Montana has no state or local sales tax. Businesses do not need a sales tax permit. However, businesses must register with the Montana Department of Revenue for applicable business taxes (e.g., withholding, corporate income tax if applicable).

    Official government source

    Free (business registration)Immediate (online via TransAction Portal)

City of Great Falls / Cascade County

3 stops
  1. Montana State Plumbing Board — Plumbing Contractor License

    Plumbing contractors in Montana must hold a Plumbing Contractor License from the Montana State Plumbing Board. A licensed Master Plumber must be on staff.

    Official government source

    $100–$200 (initial)4–8 weeks

  2. City of Great Falls City Clerk — Business License

    Great Falls requires a Business License for regulated businesses. The City Clerk's office issues licenses and processes annual renewals. This license must be renewed annually and displayed at your place of business.

    $50–$500/year depending on business type and gross revenues1–3 weeks

  3. Cascade County / Great Falls Plumbing Permit (per project)

    A separate permit must be pulled with the local building/plumbing department for each job. Inspections are required upon job completion.

    $50–$300 per project1–5 business days

Terminus

Open for business — est. $400–$1,200 · 4–10 weeks to obtain all licenses

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Official Sources

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