Transfer Your Plumber License to Missouri: Reciprocity & Endorsement (2026)

The structural fact first: Missouri does not issue a statewide journeyman plumber license, so "which board do I apply to" has no state-level answer and there is no state credential to carry across. Your first task is to identify the authority that governs the jobsite — a contractor-level board, or the city or county where you will work — and read its exam and experience rules directly. Just as important on the way out: a credential earned under Missouri's regime generally will not satisfy another state's condition that you hold a state license earned by examination, so expect new-applicant treatment if you later move to a state that does license at the state level. Treat the notes below as directions to the right authority, not a transfer checklist.

Missouri has NO statewide plumber license. RSMo Chapter 341 (Plumbers and Plumbing) sets baseline journeyman/master qualifications but is enforced by local city/county boards of examiners, which administer the exams and set the fees; the Missouri Division of Professional Registration confirms it does not license plumbers. Because the credential is municipal, there is no state-level reciprocity — a license earned in another state generally cannot be transferred by agreement, and an out-of-state plumber must qualify under the destination city/county's own rules. No state license lookup for plumbers exists, so verification_system_url is null.