How to Start an HVAC Business in Mississippi: Licensing, Insurance and Local Permits

If you searched for an HVAC license in Mississippi, the first thing to know is that the state does not issue a general business license. Starting an HVAC business here means handling three separate layers: a state contractor license from the Mississippi State Board of Contractors (MSBOC), a business filing with the Secretary of State, and local permits and privilege licenses from your city or county. The layers do not overlap the way many first-time owners expect, so the order you do things in matters.

This guide is informational, not legal or tax advice. Licensing rules, fees and local requirements change. Confirm every figure with the agency named before you pay anything, and talk to a Mississippi business attorney and a CPA before you choose your business structure.

What You Need Before You Start

Gather these items first. You will use most of them more than once.

• Your proposed business name, checked against the Secretary of State business search
• A Certificate of Formation (Form F0100) if you will form an LLC, or Articles of Incorporation (Form F0001) if you will form a corporation
• A registered agent with a physical Mississippi street address
• A certificate of insurance showing the coverage limits described in Step 4
• Your EPA Section 608 refrigerant certification, if you will service equipment that contains refrigerants
• Documented work experience in the trade, which MSBOC will ask about on its application (confirm the exact experience requirement with MSBOC)
• A list of every city and county where you plan to work
• An EIN from the IRS and a business bank account

Step 1: Choose and Form Your Business Entity

An HVAC business can operate as a sole proprietorship, a partnership, an LLC or a corporation. Most owners choose an LLC because it keeps business debts separate from personal assets, and the state filing is inexpensive.

The LLC Certificate of Formation (Form F0100) has a filing fee of $50. Filings paid for online are normally approved and filed immediately. Filings that need staff review are normally returned within 24 hours of submission. Paper filings take significantly longer.

Tax treatment matters here. By default, an LLC is a pass-through entity, so its profit flows to the members' Mississippi returns. An LLC that elects to be taxed as a corporation pays Mississippi corporate income tax and the franchise tax. The franchise tax applies to corporations, not to an LLC taxed as a partnership. For tax year 2026 it is $0.50 per $1,000 of capital above $100,000, with a $25 minimum, and it is repealed effective January 1, 2028. Ask a CPA which structure fits your situation.

If you form a corporation instead, the Articles of Incorporation (Form F0001) carry the same $50 filing fee. The Corporate Annual Report (Form F0008) costs $25 and is due April 15 for profit corporations.

Step 2: Name Your Business and Appoint a Registered Agent

An LLC name must contain the words 'limited liability company,' the abbreviation 'L.L.C.' or 'LLC.' It must be distinguishable on Secretary of State records from any registered entity or reserved name. Search before you commit, because a name that looks different to you may still be too close to an existing filing.

If you need time to file, a name reservation holds the name for 180 days for a $25 fee.

Many HVAC owners operate under a shorter trade name, such as a company nickname or a service brand. A trade name that differs from your legal name is a fictitious (assumed) business name. You file it with the Mississippi Secretary of State on Form F0070 for $25, not with the county. Do this before the name appears on trucks, invoices or permit applications.

Every Mississippi LLC must maintain a registered office and a registered agent for service of process. An individual agent must be a Mississippi resident. A noncommercial agent needs your permission before you list them. A commercial agent must file a listing statement with the Secretary of State for $100 and must accept or decline each representation within 14 days.

Once the LLC is formed, it must file an annual report (Form F0108) online by April 15 each year. The report may be filed on or after January 1, and the fee is $0. Failing to file can lead to administrative dissolution.

Step 3: Get Your Mississippi HVAC License From MSBOC

This is the license most people mean when they search for a Mississippi HVAC license. MSBOC licenses contractors, and its Mechanical major classification covers heating, cooling, refrigeration, ductwork and plumbing. Under that major, the specialties are HVAC, Refrigeration and Plumbing.

MSBOC also offers residential-only classes: Residential HVAC, Residential Mechanical and Residential Plumbing. Choose the class that matches the work you plan to bid. A residential-only class does not cover commercial jobs.

Know these rules before you apply:

• A commercial license is required for commercial jobs over $50,000, including equipment installation.
• Subcontractors doing residential electrical, mechanical, HVAC or plumbing work on a residential project need an MSBOC license.
• The MSBOC FAQ states no dollar floor for that subcontractor rule. Call MSBOC at 601-354-6161 and ask whether small service calls are covered. Do not assume they are exempt.
• Fees are $400 for a commercial license and $50 for a residential license.

In practice, a company focused on home service and replacement work may only need a residential class. Once you start bidding larger commercial installs, a commercial license is generally needed. Confirm that split with MSBOC before you choose, and ask MSBOC whether a crew member's license can cover your company's bids.

Step 4: Buy Insurance That Meets the MSBOC Minimums

Your insurance requirement depends on the license you hold:

• Commercial license: $300,000 per occurrence and $600,000 aggregate.
• Residential license: proof of coverage.

Ask your agent for a certificate of insurance that reflects the MSBOC requirement for your class. Many commercial customers and general contractors also want their own certificate before you start work, so get it in writing. Ask your agent separately whether you need workers' compensation for employees and what commercial auto coverage your service trucks require. This guide does not state those rules.

A common mistake is buying a cheaper policy with lower limits. A commercial license backed by a policy below $300,000 per occurrence and $600,000 aggregate does not meet the requirement.

Step 5: Register for Sales Tax and Other Tax Accounts

Because Mississippi issues no general business license, the tax registration that matters most is with the Department of Revenue (DOR). A sales tax permit is the DOR's permit for the privilege of operating a business in Mississippi. There is no fee for it, though a bond may be required for applicants with no permanent Mississippi location. Apply through the DOR registration page listed at the end of this guide.

The state sales tax rate is 7%. There is no county add-on. City levies apply only in Jackson and Tupelo. Ask DOR how your labor, parts and service charges are treated, since HVAC invoices often combine them on one ticket.

If you hire employees, register with DOR for withholding before your first payroll. Mississippi has no state minimum wage law, so federal minimum wage rules apply to your hourly staff.

Step 6: Get Local Privilege Licenses

Under Miss. Code 27-17, every city, town and village issues its own privilege license. Counties license only businesses outside municipalities. A shop inside a city limit deals with that city, and a shop outside any city limit deals with the county.

Privilege license fees vary, and this guide does not list them. Ask the city clerk or county office for the current fee schedule and ask whether the license is required where you have a physical location, where you perform work, or both. Plan for the cost of each license you need before you bid your first job.

Step 7: Pull Permits and Meet the HB 1163 Requirement

Mechanical installs and many replacements need a permit from the city or county where the work happens. A 2022 law, HB 1163, requires city and county permits to show the contractor's license number. Leave your MSBOC number off an application and the permit may be returned for correction.

Some cities also register or license trades locally, in addition to your state license. Ask each building department whether it does, what it requires and how often it renews. Do this before you bid work in that city.

Step 8: Meet the Federal Refrigerant Rule and Plan Your Hiring

EPA Section 608 certification is a federal requirement for technicians who service equipment containing refrigerants. Certify before you work on refrigerant lines, and keep the card in your company records. This federal certification is separate from your MSBOC license and does not replace it.

Before you hire, confirm your payroll setup with DOR and your insurance agent. Remember the federal wage rules noted in Step 5.

Common Mistakes to Avoid

• Assuming Mississippi has a state business license. It does not. Your city or county may still require a privilege license.
• Operating under a trade name without filing a fictitious business name with the Secretary of State.
• Missing the April 15 LLC annual report, which can lead to administrative dissolution.
• Choosing a residential-only class and then bidding a commercial job.
• Treating small service calls as automatically exempt from MSBOC rules without asking MSBOC first.
• Leaving your license number off permit applications, which HB 1163 requires.
• Naming a registered agent who never agreed to serve, or letting a commercial agent's 14-day window pass without a response.
• Skipping the local permit step because the state license is already in hand.

What to Expect

Once your entity is filed, your MSBOC license is issued, your insurance meets the required minimums and your local licenses are in place, you may be able to bid permitted work. Timelines depend on each agency's review, how complete your application is and local requirements. The Secretary of State processing times above are the only ones this guide states, so plan for the MSBOC and city steps to take longer than the state filing.

Compliance tends to help more than it costs. Keeping your annual report, insurance certificate and license renewals current can help you stay eligible to bid and can reduce the chance of a delayed permit. Outcomes vary by business, market and crew, and no particular revenue level is promised.

Official Resources

• Mississippi Secretary of State, Business Services: https://www.sos.ms.gov/business-services
• Business search: https://corp.sos.ms.gov/corp/portal/c/page/corpBusinessIdSearch/portal.aspx
• Online filing portal: https://corp.sos.ms.gov/corp/portal/c/page/corpnewfilings/portal.aspx
• Mississippi Department of Revenue: https://www.dor.ms.gov/
• Sales and use tax registration: https://www.dor.ms.gov/business/sales-use-tax/registration-information-sales-and-use-tax-applicants
• Mississippi Small Business Development Center Network: https://www.mississippisbdc.org/
• SBA Mississippi district: https://www.sba.gov/district/mississippi
• MSBOC licensing questions: call 601-354-6161

This article is informational only and is not legal, tax or insurance advice. For a complex setup, such as multiple entities, employees, or work across several cities, consult a qualified Mississippi attorney and a CPA before you file.