Plumbing Contractor Permit Requirements in Missoula, MT

1. EIN (Employer Identification Number)

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

   Official government source

   Free·Immediate (online application)

   Free

   Immediate (online application)

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)

   Free (business registration)

   Immediate (online via TransAction Portal)

1. Montana Board of Plumbers — Master Plumber License (business registers as construction contractor)

   Montana licenses individual plumbers (journeyman and master) through the Montana Board of Plumbers — there is no separate 'plumbing contractor' license from the board. A plumbing business must have a Montana-licensed Master Plumber and register with the Montana Department of Labor & Industry as a construction contractor (registration is being converted to a DLI license under MCA Title 37, ch. 45, effective January 1, 2026). Per-project plumbing permits are pulled from the local building department.

   Official government source

   Individual master/journeyman license fees are set by the board (see the current application; FY2026 renewal fees were 100% abated). Construction contractor registration fee is separate.·4–8 weeks

   Individual master/journeyman license fees are set by the board (see the current application; FY2026 renewal fees were 100% abated). Construction contractor registration fee is separate.

   4–8 weeks

2. City of Missoula — Business License (Community Planning, Development & Innovation)

   Most businesses operating in Missoula must obtain a city business license through the Community Planning, Development & Innovation (CPDI) department, applied for via the city's online Permit and License Portal. State-licensed professionals (e.g., physicians, attorneys, real estate agents, insurance professionals, nail technicians) are exempt. General business licenses expire May 31 each year regardless of issue date and must be renewed annually.

   Official government source

   $60 per full-time-equivalent employee for a commercial location (minimum $240) or $40/FTE home-based (minimum $160); renewal $27/FTE (minimum $108) — CY2026 fee schedule, Resolution 8887·1–3 weeks

   $60 per full-time-equivalent employee for a commercial location (minimum $240) or $40/FTE home-based (minimum $160); renewal $27/FTE (minimum $108) — CY2026 fee schedule, Resolution 8887

   1–3 weeks

3. Missoula County / Missoula 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.

   Official government source

   Permit fees are valuation-based; use the city's Estimate Permit Fees tool (ci.missoula.mt.us/2966) or contact the Building Division·1–5 business days

   Permit fees are valuation-based; use the city's Estimate Permit Fees tool (ci.missoula.mt.us/2966) or contact the Building Division

   1–5 business days

Official Sources

• Montana State Plumbing Board — Plumbing Contractor License
• City of Missoula City Clerk

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