HVAC Contractor Permit Requirements in Hattiesburg, MS

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. Mississippi Department of Revenue - Sales Tax Permit

   Any business selling tangible personal property or a taxable service in Mississippi must hold a sales tax permit from the Department of Revenue. The general state rate is 7%, one of the highest in the country; reduced rates apply to some categories, including 5% on SNAP-eligible groceries and light vehicles, 3% on heavy trucks and manufactured homes, and 1.5% on farm and manufacturing machinery. Register online through TAP.

   Official government source

   No fee - the Mississippi Department of Revenue does not charge for a sales tax permit.·Register online through TAP; allow about two weeks to receive your permit and filing information by mail.

   No fee - the Mississippi Department of Revenue does not charge for a sales tax permit.

   Register online through TAP; allow about two weeks to receive your permit and filing information by mail.

2. EPA Section 608 Technician Certification (refrigerants)

   Federal law requires anyone who maintains, services, repairs, or disposes of equipment that could release refrigerants, and anyone who buys those refrigerants, to hold EPA Section 608 certification. Certification is by type - Type I small appliances, Type II high-pressure, Type III low-pressure, or Universal - is issued by an EPA-approved certifying organization, does not expire, and applies in Mississippi as in every state.

   Official government source

   Set by the EPA-approved certifying organization that administers the test; EPA itself charges nothing.·The test is usually taken in a single sitting, with the certificate issued by the certifying organization shortly after passing.

   Set by the EPA-approved certifying organization that administers the test; EPA itself charges nothing.

   The test is usually taken in a single sitting, with the certificate issued by the certifying organization shortly after passing.

1. Mississippi State Board of Contractors - HVAC/Mechanical Contractor License

   HVAC contractors in Mississippi must hold a license from the Mississippi State Board of Contractors once a project's value reaches $50,000; work below that threshold is exempt from the certificate-of-responsibility requirement (Miss. Code Ann. Section 31-3-1). The Board issues Residential and Commercial mechanical/HVAC classifications, and the qualifying party must pass the Mississippi Law and Business Management exam plus the trade exam. EPA Section 608 certification is separately required for handling refrigerants.

   Official government source

   $50 residential application or $400 commercial application; renewals are $100 residential and $400 commercial (Mississippi State Board of Contractors fee schedule).·Not published by the Board; the qualifying party must pass the required exams before the application is acted on - confirm current processing time at 800-880-6161.

   $50 residential application or $400 commercial application; renewals are $100 residential and $400 commercial (Mississippi State Board of Contractors fee schedule).

   Not published by the Board; the qualifying party must pass the required exams before the application is acted on - confirm current processing time at 800-880-6161.

2. City of Hattiesburg City Clerk/Tax Division - Privilege Tax License

   All businesses must hold a Privilege Tax License to operate in Hattiesburg, issued by the City Clerk/Tax Division on the 2nd floor of City Hall, 200 Forrest Street. The application asks for the number of employees and/or the wholesale value of inventory; some business types, such as pawn shops and contractors, must supply additional documentation. Renewed annually and displayed at the place of business.

   Official government source

   Set under Mississippi's privilege tax schedule from the number of employees and/or wholesale value of inventory; Hattiesburg does not publish a fee table - the Tax Division quotes the amount at application (601-545-4523).·Not published by the City; applications are filed in person with the Tax Division at City Hall (601-545-4523).

   Set under Mississippi's privilege tax schedule from the number of employees and/or wholesale value of inventory; Hattiesburg does not publish a fee table - the Tax Division quotes the amount at application (601-545-4523).

   Not published by the City; applications are filed in person with the Tax Division at City Hall (601-545-4523).

3. City of Hattiesburg Mechanical Permit (per project)

   A mechanical permit must be obtained from the City of Hattiesburg Building Division for each HVAC installation or major repair. The city's published mechanical inspection sequence is rough-in and final. Forrest County does not issue permits inside Hattiesburg city limits.

   Official government source

   Hattiesburg publishes fees only for a new single-family residence ($50 plan review plus $500 permit and inspections). Per-trade commercial fees are set by the city's Permit Fee Ordinance and are not published online — confirm with the Building Division (601-554-1003).·Not published online — confirm current turnaround and inspection scheduling with the Building Division (601-554-1003).

   Hattiesburg publishes fees only for a new single-family residence ($50 plan review plus $500 permit and inspections). Per-trade commercial fees are set by the city's Permit Fee Ordinance and are not published online — confirm with the Building Division (601-554-1003).

   Not published online — confirm current turnaround and inspection scheduling with the Building Division (601-554-1003).

Official Sources

• Mississippi State Board of Contractors — HVAC Contractor License
• City of Hattiesburg Revenue Division

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