Plumbing Contractor Permit Requirements in Hattiesburg, MS

Complete permit and license guide for starting a plumbing contractor in Hattiesburg, Forrest County, Mississippi.

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 Mississippi

1 stop

  1. Mississippi Department of Revenue — Sales Tax Permit

    Required for all businesses selling tangible personal property or taxable services in Mississippi. Mississippi charges a 7% state sales tax (one of the highest in the nation). Register with the Mississippi Department of Revenue.

    Official government source

    FreeImmediate (online via TAP)

City of Hattiesburg / Forrest County

3 stops

  1. Mississippi State Board of Contractors — Plumbing Contractor License

    Plumbing contractors in Mississippi must hold a Plumbing Contractor License. A Master Plumber must be designated. Requires passing a state exam.

    Official government source

    $150–$300 (initial)4–8 weeks

  2. City of Hattiesburg Revenue Division — Business License

    Hattiesburg requires a Business License for all businesses operating within city limits. Fees vary by business type. This license must be renewed annually and displayed at your place of business.

    Official government source

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

  3. Forrest County / Hattiesburg 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

    $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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