Plumbing Contractor Permit Requirements in Nashua, NH

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. New Hampshire — No Sales Tax

   New Hampshire has no state sales tax and no local sales taxes, so businesses need no sales tax permit or resale registration for sales tax purposes. Businesses may instead owe the Business Enterprise Tax and the Business Profits Tax, both administered by the NH Department of Revenue Administration; BET paid can be credited against BPT. Restaurants, caterers and lodging operators separately collect the Meals and Rooms (Rentals) Tax and must hold a DRA license for it. Filing and payment are handled through DRA's Granite Tax Connect portal.

   Official government source

   No fee to register for business taxes with DRA. For taxable periods beginning on or after January 1, 2025, a BET return is due from any enterprise with more than $298,000 in gross receipts or an enterprise value tax base above $298,000; the BET rate is 0.55%·Immediate — registration and filing are done online through Granite Tax Connect

   No fee to register for business taxes with DRA. For taxable periods beginning on or after January 1, 2025, a BET return is due from any enterprise with more than $298,000 in gross receipts or an enterprise value tax base above $298,000; the BET rate is 0.55%

   Immediate — registration and filing are done online through Granite Tax Connect

1. New Hampshire OPLC Mechanical Licensing Board — Master Plumber License

   Plumbing contractors in New Hampshire must hold a Master Plumber license issued by the Mechanical Licensing Board within the Office of Professional Licensure and Certification. There is no separate “NH Plumbers Licensing Board.” The same board licenses Apprentice and Journeyman Plumbers, Fuel Gas Fitters, Hearth Installers, Domestic Appliance Technicians, Oil Heating Technicians and mechanical business entities. Licensure requires documented apprentice/journeyman experience and passing the state exam.

   Official government source

   $330 application fee for a Master Plumber license (renewal and reinstatement are also $330); Journeyman Plumber $198 and Apprentice Plumber $88; a Mechanical Business Entity license is $275·No processing time is published by OPLC

   $330 application fee for a Master Plumber license (renewal and reinstatement are also $330); Journeyman Plumber $198 and Apprentice Plumber $88; a Mechanical Business Entity license is $275

   No processing time is published by OPLC

2. City of Nashua — No General Business License

   The City of Nashua does not require a general business license. The City Clerk's Office licenses only specific enumerated activities: chauffeurs (taxi drivers), taxicabs, pawnbrokers and secondhand dealers, itinerant vendors and hawkers/peddlers, amusement devices, and shows such as carnivals and concerts, plus separate permits for raffles, tag days and public events. A business outside these categories does not need a Nashua business license; confirm with the City Clerk (603-589-3010) if unsure.

   Official government source

   Not applicable for most businesses; enumerated categories are published: taxicab $100/year, chauffeur $80/year, pawnbroker/secondhand dealer $50/year, shows $50, vendors $10/day, $25/week or $100/year, raffles $10, tag days free·Not applicable

   Not applicable for most businesses; enumerated categories are published: taxicab $100/year, chauffeur $80/year, pawnbroker/secondhand dealer $50/year, shows $50, vendors $10/day, $25/week or $100/year, raffles $10, tag days free

   Not applicable

3. City of Nashua Building Safety Department — Plumbing Permit (per project)

   A separate plumbing permit must be pulled from the City of Nashua Building Safety Department for each job, using the commercial or residential plumbing permit form emailed to [email protected]. Hillsborough County has no permitting function. Inspections are required upon job completion.

   Official government source

   Set by the City's permit fee schedule adopted in Ordinance O-21-045 and published on the Building Safety Department's Permits page; the amount depends on the fixtures and work involved·No processing time is published by the City

   Set by the City's permit fee schedule adopted in Ordinance O-21-045 and published on the Building Safety Department's Permits page; the amount depends on the fixtures and work involved

   No processing time is published by the City

Official Sources

• New Hampshire Plumbers Licensing Board — Master Plumber License
• City of Nashua City Clerk

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