Navigating plumbing contractor licensing in Mississippi requires understanding the state's multi-layered system. The Mississippi State Board of Contractors (MSBOC) issues company-level Certificates of Responsibility for larger commercial and residential projects, while the State Department of Health handles individual plumber licenses for health-regulated work. This guide will walk you through the distinct pathways to legally perform plumbing work in the Magnolia State.
Do You Need a Plumbing License to do Plumbing Work in Mississippi?
Yes, plumbing professionals and companies operating in Mississippi require specific licenses depending on the scope and value of their projects. Licensure is primarily managed by the Mississippi State Board of Contractors (MSBOC) for company-level certificates and the State Department of Health for certain individual plumbers.
A Certificate of Responsibility from the MSBOC with a plumbing classification is required for projects where the total cost meets or exceeds certain thresholds:
- Commercial Plumbing: Required for projects valued over $50,000.
- Residential Plumbing: Required for residential building construction over $50,000 or residential remodeling and repair projects over $10,000.
Types of Plumbing Licenses in Mississippi
Mississippi issues company-level Certificates of Responsibility for specific plumbing work classifications through the Mississippi State Board of Contractors (MSBOC) and individual plumber and gas fitter licenses through the State Department of Health.
Mississippi State Board of Contractors (MSBOC) Licenses
The MSBOC licenses contracting companies, not individual journeyman or master plumbers. Individual trade licensing is generally handled at the municipal level, except for work falling under the jurisdiction of the Department of Health.
- Major Classification: Plumbing Work (Commercial): This classification is required for companies performing commercial plumbing work on projects valued at more than $50,000. A designated "Qualifying Party" who has passed the required exams must be associated with the company.
- Residential Builder License (with Plumbing Scope): This license is required for companies undertaking residential construction projects over $50,000 or remodeling projects over $10,000 that include plumbing work. This license also requires a designated Qualifying Party.
Mississippi State Department of Health Plumbing & Gas Inspectors Licenses
The Mississippi State Department of Health issues licenses to individual plumbers and gas fitters who work on projects regulated by the department. This is a separate path from the company-level MSBOC certificate and has its own set of requirements.
Mississippi Plumbing License Requirements
The requirements for a plumbing contractor license in Mississippi depend on whether you are seeking a company-level Certificate of Responsibility from the MSBOC or an individual license from the Department of Health.
Requirements for MSBOC Certificate of Responsibility (Commercial/Residential Plumbing Scope)
To obtain a Certificate of Responsibility for a plumbing company, your business must meet the following criteria:
- Business Entity: Be a legally registered business, such as a sole proprietorship, corporation, or LLC.
- Qualifying Party: Designate at least one Qualifying Party who has successfully passed the required state exams. This individual is responsible for the company's compliance with contracting laws and regulations.
- Financial Responsibility: Provide proof of the following:
- A certificate of insurance evidencing general liability coverage of at least $300,000 per occurrence and $600,000 aggregate (per the MSBOC Commercial Laws and Rules).
- Workers' compensation insurance, if required by state law.
- A financial statement; applicants who do not provide one must show a net worth of at least $20,000.
- A certificate of good standing from the Mississippi Secretary of State (required for entities other than sole proprietors).
Requirements for State Department of Health Individual Plumber/Gas Fitter License
The specific requirements for individual plumber or gas fitter licensure are established by the Mississippi State Department of Health. These requirements, including experience, exams, and application criteria, must be verified directly with the Department of Health.
How to Apply for an MSBOC Plumbing Certificate of Responsibility in Mississippi
Applying for an MSBOC plumbing Certificate of Responsibility involves establishing a business entity, designating a qualifying party, passing required exams, securing necessary financial documentation, and submitting a comprehensive application packet to the Board.
- Determine Your License Type: Decide whether your company needs the Commercial "Plumbing Work" classification, a Residential Builder license with a plumbing scope, or both, based on the type of projects you intend to perform.
- Establish Your Business Entity: Register your business as a sole proprietorship or form a legal entity like an LLC or corporation with the Mississippi Secretary of State.
- Designate a Qualifying Party: Identify the individual who will serve as the Qualifying Party for your company. This person must pass the required state exams.
- Pass Required Examinations: The designated Qualifying Party must schedule and pass both the Business and Law exam and a plumbing trade exam through the state's approved testing service.
- Gather Supporting Documentation: Compile all required documents for your application packet. This typically includes:
- Proof of general liability insurance.
- Proof of workers' compensation insurance (or an exemption).
- Certificate of Good Standing from the Secretary of State (for corporations/LLCs).
- Completed and signed application form.
- Exam score reports for the Qualifying Party.
- Submit Application and Fees: Submit the complete application packet along with the appropriate fees to the Mississippi State Board of Contractors.
Plumbing License Exams in Mississippi
For an MSBOC plumbing Certificate of Responsibility, the qualifying party must pass the Mississippi Business and Law exam, in addition to a specific plumbing trade exam, which can be either the NASCLA Accredited Trade Exam for plumbing or the MSBOC state-specific plumbing trade exam.
Mississippi Business and Law Exam
This exam is required for all Qualifying Parties seeking an MSBOC license, regardless of trade. It covers topics related to state contracting laws, regulations, and business management. The exam is administered by a testing service approved by the board.
Plumbing Trade Exams
The Qualifying Party must pass one of the following trade exams:
- Option 1: NASCLA Accredited Trade Exam for Plumbing: This is a standardized national exam. Passing a NASCLA-accredited exam may offer easier license portability to other states that also accept it.
- Option 2: MSBOC State-Specific Plumbing Trade Exam: This exam is specific to Mississippi's requirements and practices.
Both trade exams are administered by PSI, the state's approved testing service.
Individual Plumber/Gas Fitter Exams (State Department of Health)
The specific exams required for individual licensure are determined by the State Department of Health. Confirm exam requirements, content, and scheduling directly with the Department.
How Much Does a Plumbing License Cost in Mississippi?
The cost of a plumbing license in Mississippi varies significantly depending on the license type, encompassing application fees, certificate fees, exam fees, and potential fees for additional classifications or reciprocity waivers.
MSBOC Certificate of Responsibility Fees
- Commercial Application Fee: $400
- Residential License Application Fee: $50
- Certificate of Responsibility Fee: $200 (paid upon application or renewal)
- Additional Trade Classification Fee: $100 per classification
- Reciprocal Exam Waiver Fee: $50 per exam waived
Exam Fees
Exam fees are paid directly to the testing administrator, PSI. The specific fees for the Mississippi Business and Law exam and the plumbing trade exams are published by the testing service; confirm current costs with them before scheduling.
Individual plumbers and gas fitters who work on State Department of Health–regulated projects are licensed separately by the Department of Health; those application and license fees are set by the Department and are not part of the MSBOC contractor fee schedule above.
How to Renew Your Mississippi Plumbing License
Mississippi plumbing licenses, including MSBOC Certificates of Responsibility and State Department of Health individual licenses, typically require annual renewal to maintain active status.
MSBOC Certificate of Responsibility Renewal
- Renewal Cycle: All certificates are renewed annually.
- Renewal Notification: Renewal notices were transitioned to email-only beginning in 2026.
- Continuing Education (CE): No statewide continuing-education requirement for the MSBOC Certificate of Responsibility was identified in the sources reviewed.
- Renewal Fees: The renewal carries the $200 Certificate of Responsibility fee.
Individual plumber licenses issued by the State Department of Health follow that Department's own renewal cycle and fees, separate from the MSBOC schedule above.
Does Mississippi Offer Reciprocity for Plumbing Licenses?
Yes, Mississippi offers reciprocal exam-waiver agreements for the trade exam portion of the MSBOC Certificate of Responsibility with several other states, though the Mississippi Business and Law exam is always required.
MSBOC Reciprocity for Trade Exams
Mississippi has reciprocal agreements with states including Alabama, Arkansas, Louisiana, and others. To qualify for a trade exam waiver, you must meet the following conditions:
- Hold a current, active license in a state with a reciprocal agreement.
- Have obtained the license by passing that state's examination.
- The license must be in good standing with no recent disciplinary action.
Even with a trade exam waiver, all applicants must pass the Mississippi Business and Law exam. A non-refundable fee of $50 per exam waived must be paid to the MSBOC.
General Mississippi Plumbing License Questions
What is the difference between an MSBOC plumbing license and a State Department of Health plumbing license?
An MSBOC license, called a Certificate of Responsibility, is issued to a contracting company (e.g., an LLC or corporation) for commercial or residential projects exceeding certain dollar thresholds. A State Department of Health license is issued to an individual plumber or gas fitter for work on health-department-regulated projects. They are two separate licensing paths for different types of work and entities.
Do I need a separate local plumbing license in Mississippi?
The MSBOC does not issue individual journeyman or master plumber licenses; this responsibility is typically handled at the municipal (city or county) level. You must check with the local building department in the jurisdiction where you plan to work to determine their specific requirements for individual registration or licensing, in addition to holding the required state-level MSBOC certificate for your company.
What is a 'qualifying party' for an MSBOC plumbing license?
A qualifying party is an individual associated with a licensed contracting company who has passed the required state exams (Business and Law, and Trade). This person is legally responsible for the company's projects and compliance with state regulations. A company cannot hold a Certificate of Responsibility without a designated qualifying party.
How long does it take to get a plumbing contractor license in Mississippi?
Current application-processing and exam-scheduling timelines vary. The process involves multiple steps, including exam scheduling, application compilation, and board review. Confirm the current processing timelines directly with the Mississippi State Board of Contractors.
Can a convicted felon get a plumbing license in Mississippi?
The Mississippi State Board of Contractors reviews applications on a case-by-case basis. The board's rules and regulations outline the criteria for licensure. Applicants with a criminal history should contact the MSBOC directly to discuss their specific situation and understand the application requirements.
Mississippi Plumbing License Requirements & Application
What are the experience requirements for an MSBOC plumbing license?
The MSBOC licenses contractors at the company level and focuses on the qualifying party passing the required exams rather than stipulating a specific number of years of field experience. The exams serve as the primary measure of competency for the qualifying party. Individual experience is typically vetted at the municipal level for journeyman or master status.
What documents do I need to apply for a Mississippi plumbing license?
For an MSBOC Certificate of Responsibility, you will generally need a completed application, proof of general liability and workers' compensation insurance, a Certificate of Good Standing from the MS Secretary of State (for corporations/LLCs), and the qualifying party's exam score reports. Always refer to the most current application checklist from the MSBOC for a complete list.
Are there different financial limits for MSBOC plumbing licenses?
Yes, the requirement for an MSBOC license is triggered by project value. For commercial plumbing, a license is needed for projects over $50,000. For residential work, a license is needed for new construction over $50,000 or remodeling/repairs over $10,000.
What is the minimum general liability insurance required for a Mississippi plumbing contractor?
Per the MSBOC Commercial Laws and Rules, an applicant for a Certificate of Responsibility must carry general liability insurance of at least $300,000 per occurrence and $600,000 aggregate. Workers' compensation coverage is also required if applicable, and applicants who do not submit a financial statement must show a net worth of at least $20,000.
Mississippi Plumbing License Exams
What exams are required for a Mississippi plumbing contractor license?
The qualifying party for an MSBOC plumbing license must pass two exams: the Mississippi Business and Law exam and a plumbing trade exam. The trade exam can be either the NASCLA Accredited Trade Exam for Plumbing or the MSBOC state-specific plumbing trade exam.
Can I use my NASCLA Accredited Trade Exam for a Mississippi plumbing license?
Yes, Mississippi accepts the NASCLA Accredited Trade Exam for plumbing as a valid trade exam for the qualifying party.
Where can I find study materials for Mississippi plumbing license exams?
The exam administrator, PSI, provides a Candidate Information Bulletin for Mississippi contractors. This bulletin typically outlines the content covered in each exam and lists approved reference materials you can bring to the test.
What is the passing score for Mississippi plumbing license exams?
The passing score for each exam is set by the MSBOC in conjunction with the testing service. The Candidate Information Bulletin from the exam provider typically provides details on scoring and the minimum score required to pass.
Mississippi Plumbing License Costs & Renewal
What is the total cost to get a plumbing contractor license in Mississippi?
The total cost includes a $400 commercial application fee (or $50 for residential), a $200 certificate fee, exam fees paid to the testing provider, and costs for insurance and business registration. Additional fees apply for extra classifications ($100 each) or reciprocity waivers ($50 per exam).
How often do I need to renew my Mississippi plumbing license?
MSBOC Certificates of Responsibility must be renewed annually to remain active.
Are there continuing education requirements for Mississippi plumbing contractors?
Yes, the MSBOC requires qualifying parties to complete continuing education for license renewal. The specific number of hours and approved course topics for plumbing certificate holders are published in the board's rules; confirm the current requirements with the MSBOC.
What happens if my Mississippi plumbing license expires?
Operating with an expired license is illegal and can result in significant penalties. The MSBOC has procedures for late renewal or reinstatement, which may involve additional fees. It is critical to renew your license on time.
Mississippi Plumbing License Reciprocity
Does Mississippi have plumbing license reciprocity with other states?
Yes, Mississippi has reciprocal agreements that allow for the waiver of the trade exam for applicants licensed in certain states, such as Alabama, Arkansas, and Louisiana.
Is the Mississippi Business and Law exam waived under reciprocity?
No, the Mississippi Business and Law exam is never waived. All applicants, including those applying via reciprocity, must pass this exam to be granted a license.