MISSISSIPPI · plumber
Commercial Mechanical Contractor — Plumbing (MSBOC)
Mississippi State Board of Contractors (MSBOC)Not regulated at state level below the commercial threshold
Mississippi does not issue a statewide journeyman or master plumber license. Plumbing work below the commercial-license threshold (including most residential plumbing) is regulated at the local city or county level. Contact the local building official or permit office for required credentials. Source: MSBOC (https://msboc.us/).
When the state license applies
Plumbing contractors performing commercial work valued at or above $10,000 (labor and materials) need a Mississippi commercial contractor license under the MSBOC Mechanical classification. Plumbing and HVAC contractors both fall under the mechanical classification. Source: MSBOC Apply For A License (https://www.msboc.us/contractors/licenses/).
Scope of work
The mechanical classification authorizes the contractor business to bid and perform commercial plumbing projects over $10,000. The state license credentials the contractor business, not individual plumbers.
Experience and training
Applicants demonstrate experience through the qualifying party on the application. Source: MSBOC (https://msboc.us/).
Exam
The qualifying party passes a trade exam and the Mississippi Business and Law exam administered by a contracted vendor. Source: MSBOC (https://msboc.us/).
Financial and bond requirements
Commercial contractors submit an audited or reviewed CPA-prepared financial statement (within the last 12 months) showing a net worth of $50,000 for major classifications and $20,000 for specialty classifications. A $100,000 commercial contractor license bond is required. General liability insurance of $300,000 per occurrence / $600,000 aggregate is required, plus workers' compensation coverage if the applicant has 5 or more employees. Source: MSBOC (https://msboc.us/).
Renewal and CE
Commercial contractor license renews annually (verify current cycle and fee with MSBOC). Mississippi does not impose a uniform statewide CE mandate on trade contractor licenses; verify current rule before renewal.
Local authority below the threshold
For residential work and commercial work under $10,000, contact the city or county building official. Many Mississippi municipalities require local plumber registration and may issue their own journeyman or master credentials.
Verified Apr 25, 2026 · compiled from public sources, verify current rules with Mississippi State Board of Contractors (MSBOC) before acting