Missouri to Maryland: master HVAC technician license reciprocity
Missouri does not issue a statewide master HVAC technician license, so there is nothing to transfer. Here is Maryland's standard path for out-of-state applicants.
Your origin state does not issue a statewide license at this level, so there is no license to transfer. The destination's standard out-of-state path is shown; expect to meet it in full.
Reference only, not legal advice. Rules change; confirm with the licensing board before you apply. Full disclaimer.
Out-of-state master without a reciprocal agreement
Your out-of-state credentials give no advantage. You meet the destination's requirements from scratch.
A master or contractor-level HVAC licensee from a state other than Delaware or Virginia must qualify for an original Maryland master license by examination; the Board's FAQ says reciprocal licensing is available only where an agreement exists. Bus. Reg. §9A-302(b) frames the 3-year requirement as employment under a Maryland journeyman-or-higher license under a master contractor, but §9A-302(g) lets the Board credit up to 6 years of HVACR work experience that does not meet that pattern when it provided comparable experience, and up to 3 years of formal study, so documented out-of-state experience can be submitted to PSI (which reviews eligibility for the Board) toward the master exam. The applicant passes the 100-question open-book master exam with 70% ($150), registers the license, pays the $94.50 license fee, and files a certificate of insurance ($300,000 general liability, $100,000 property damage) if they will contract work. Bus. Reg. §9A-305 authorizes the Board, by majority vote, to waive the exam for a licensee of any state that waives its exam for Maryland licensees to a similar extent, but the Board has published that waiver only for Delaware and Virginia. There is no separate law or business exam.
The Board's published materials do not say whether PSI accepts out-of-state journeyman-level experience toward the 3-year master requirement without a Maryland journeyman license; the PSI bulletin says an applicant who does not meet the standard master criteria may instead sit for a Master Restricted exam with 6 years of qualifying experience. The Board's fee page lists no separate application fee.
At a glance
- Trade exam
- Required
- Law / code exam
- Not required
- Out-of-state hours
- Count toward eligibility
What you must already have
- You must document at least 3 years of qualifying work experience.At least 3 years of active experience regularly and principally providing HVACR services under a journeyman-or-higher license under the direction and control of a master HVACR contractor, with at least 1,875 hours in the year before application (Bus. Reg. §9A-302(b)); the Board may credit up to 6 years of comparable work experience and up to 3 years of formal study under §9A-302(g).
What you'll do to get licensed in Maryland
- 1Trade exam. Pass the destination's trade exam. Maryland Master HVACR Contractor examination administered by PSI: 100 questions, 70% to pass, 240 minutes, open book (2012 International Mechanical Code, Modern Refrigeration and Air Conditioning, ACCA Manual J, 29 CFR 1926, ACCA Ductulator).
- 2Exam fee. Pay the exam fee ($150). PSI examination fee for the Master Contractor exam, valid for one attempt (Master Restricted specialties $50 each); a failed exam may be retaken after 30 days with a new fee.
- 3License fee. Pay the license or certificate fee ($94.50). Master license fee, nonrefundable, effective July 1, 2025 (master restricted $31.50 per area licensed, capped at three areas; limited $94.50).
- 4Insurance. Carry the required insurance. Certificate of insurance if the licensee will sign or approve HVACR contracts: general liability at least $300,000 and property damage at least $100,000 (combined at least $400,000), State Board of HVACR Contractors named as certificate holder (Bus. Reg. §9A-402).
- 5Other. Hold EPA Section 608 technician certification to handle refrigerant; federal law requires it, but it is not a condition of this state license (if applicable).
Published fees on this path total $244.50, excluding exam-vendor fees, bonds, and insurance.
What you'll need to buy or arrange
Exam preparation
Most boards contract PSI, Prov, or ICC for exams. Check which code edition the exam is written to before buying a prep course.
- Trade exam
- Exam fee · $150
- Other · if applicable
Liability insurance
Some states require proof of general liability or workers' compensation coverage at licensing time.
- Insurance
How Maryland licenses master HVAC technicians
Maryland master HVAC technician · “Master HVACR Contractor”
Statewide license
Maryland's highest person-held HVACR credential is the Master HVACR Contractor license issued by the Board of Heating, Ventilation, Air Conditioning and Refrigeration Contractors; it authorizes installation and maintenance in all areas of HVACR work and is the license under which HVACR contracting is done. The Board also issues Master Restricted (one or more areas: forced air, hydronic, ventilation, air conditioning, refrigeration) and Limited Contractor (maintenance and repair only) licenses. A new master must have been licensed as a journeyman (or journeyman restricted, limited or master restricted) and regularly and principally employed providing HVACR services under a master for at least 3 years, with 1,875 hours in the year before applying, and pass the PSI master exam (100 questions, 70%, 240 minutes, open book, $150); the license fee is $94.50. A master, master restricted or limited licensee who signs or approves HVACR contracts must carry $300,000 general liability and $100,000 property damage insurance with the Board as certificate holder. The Board reciprocates only with Delaware and Virginia; licensees of those states who qualify are licensed without the Maryland exam.
Why Missouri has nothing to transfer
Missouri master HVAC technician
Licensed by cities and counties
Missouri does not issue a master HVAC license or a statewide mechanical contractor license; the Division of Professional Registration licenses no HVAC or mechanical profession, and unlike the electrical trade there is no voluntary statewide contractor license for HVAC. The master-level credential exists only at the local level under names that vary by jurisdiction: Springfield certifies Master Mechanical craftsmen (4 years as a certified journeyman or 10 years of experience, ICC exam, $50), Kansas City issues a mechanical certificate of qualification to the supervisor who qualifies a licensed mechanical contractor (Prometric or ICC exam, $60 application, $181 four-year renewal), and St. Louis County and the City of St. Louis license mechanical contractors through their boards of examiners. An out-of-state master HVAC license carries no state-level recognition in Missouri, and none of these jurisdictions publish a reciprocity path for it; Springfield accepts an identical ICC, Prometric, Experior or Block exam score in place of retesting and Kansas City may accept a comparable exam it deems equivalent. A master arriving from another state should expect to qualify in each jurisdiction separately and then obtain that jurisdiction's mechanical contractor license to pull permits. EPA Section 608 certification is a separate federal requirement.
How local licensing works in Missouri
How local licensing works. Missouri has no state HVAC license and no statute standardizing local HVAC licensing; each city or county sets its own master, supervisor and contractor requirements.
Springfield. Building Development Services certifies Master Mechanical craftsmen: 4 years as a certified journeyman in the trade or 10 years of satisfactory experience, documented on notarized employer forms and approved by the Building and Trades board; ICC master mechanical exam through Pearson Vue (about $125), 75% to pass; certification card $50 with $50 annual renewal. 'Reciprocation' applicants submit copies of their other-state licenses and an identical-exam score of 75% or better from Prometric, Experior, Block or ICC; otherwise they test.
Kansas City. City Planning and Development licenses mechanical contractors ($55 application, $181 issuance, $181 renewal every four years) whose scope covers heating, duct and ventilation systems, refrigeration maintenance, gas piping to burners and control wiring. Every licensed contractor must employ a full-time supervisor who holds a Kansas City certificate of qualification in the mechanical trade; the certificate requires an application with notarized references and a passing score from a recognized agency such as Prometric or ICC ($60 application, first four-year certificate free, $181 renewal), and the city may accept a comparable exam from another jurisdiction if it deems it equivalent or superior.
St. Louis County. The Board of Examiners for Mechanical Licensing certifies mechanical contractors (a certified contractor list is published) and requires a licensed mechanical contractor bond and, for some applicants, a financial responsibility bond; applications and renewals go through the Accela portal. Master-level exam and experience details are not published on the pages that could be opened.
City of St. Louis. The Mechanical Contractors Board of Examiners (Ordinance 62579, City Code 25.10) reviews each applicant's qualifications for a Mechanical Contractor's license issued by the Building Division; the license is required to pull mechanical permits for boilers, furnaces, exhaust systems and ventilation. Contractors also need the city's graduated business license.
Out-of-state holders. No reciprocity or endorsement path for another state's master HVAC license was found in any of these jurisdictions. The practical route is to present an identical ICC or Prometric master mechanical score where accepted (Springfield; Kansas City case by case), document experience, and apply for the local master certificate and contractor license in each jurisdiction where work will be performed.
Common questions
- Do I have to take the Maryland master HVAC technician exam if I'm licensed in Missouri?
- Yes. Maryland requires the trade exam on this path.
- What does it cost to get a Maryland master HVAC technician license from Missouri?
- Published fees on this path total $244.50, not counting exam vendor fees or bonds.
- Do my Missouri work hours count in Maryland?
- Yes. Documented out-of-state experience counts toward Maryland's eligibility requirements.
- Does it work the other way, from Maryland to Missouri?
- Not necessarily. Reciprocity is directed. Going from Maryland to Missouri, the mechanism is not applicable.
Sources
- EPA Section 608 Technician Certification Requirements · 40 CFR Part 82, Subpart F (Clean Air Act §608) · U.S. Environmental Protection Agency · Other · verified September 15, 2026
- Md. Code, Business Regulation §9A-101 - Definitions (HVACR licenses) · Md. Code, Bus. Reg. §9A-101 · Maryland General Assembly · Statute · verified September 15, 2026
- Md. Code, Business Regulation §9A-302 - Qualifications of applicants · Md. Code, Bus. Reg. §9A-302 · Maryland General Assembly · Statute · verified September 23, 2026
- Md. Code, Business Regulation §9A-305 - Waiver of examination for out-of-state licensees (reciprocity) · Md. Code, Bus. Reg. §9A-305 · Maryland General Assembly · Statute · verified September 15, 2026
- Md. Code, Business Regulation §9A-309 - Term and renewal of licenses · Md. Code, Bus. Reg. §9A-309 · Maryland General Assembly · Statute · verified September 23, 2026
- Md. Code, Business Regulation §9A-402 - Insurance requirement for contractor licensees · Md. Code, Bus. Reg. §9A-402 · Maryland General Assembly · Statute · verified September 15, 2026
- Maryland HVACR Board - Apply for an Original License (license categories) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland Board of Heating, Ventilation, Air Conditioning and Refrigeration Contractors (HVACR) - Home · Md. Code, Bus. Reg. Title 9A; COMAR 09.15 · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland HVACR Board - Taking the Exams · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland HVACR Board - Licensing Frequently Asked Questions · Maryland Department of Labor, Division of Occupational and Professional Licensing · Faq · verified September 23, 2026
- Maryland HVACR Board - Fees (COMAR fee schedule effective July 1, 2025) · COMAR 09.15.01.03 · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland HVACR Board - Insurance Requirements · Md. Code, Bus. Reg. §9A-402 · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland HVACR Board - Licensing Requirements (master, master restricted, limited, journeyman) · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 23, 2026
- Maryland HVACR Board - Apply for a Reciprocal License · Maryland Department of Labor, Division of Occupational and Professional Licensing · Agency Page · verified September 15, 2026
- Maryland State Board of HVACR Contractors - Qualification Information Bulletin (PSI, updated 9/1/2024) · Maryland Department of Labor / PSI Services LLC · Other · verified September 23, 2026
Verified dates are when a person last opened each source and confirmed the facts above. Cite the board, not us.