Kansas City requires every licensed contractor to employ a full-time, qualified supervisor who serves only one company at a time. Here is how Missouri's designated supervisor rule works across Kansas City, Springfield, Jefferson City and St. Louis, what the statutes add, and why it makes the rented-license model impossible.
Most states that use a qualifier model bury the employment requirement in an administrative rule and leave you to infer it. Kansas City, Missouri put it in a licensing bulletin in plain English:
"Every contractor must employ a full-time, qualified supervisor to oversee tradeswork. A supervisor for a licensed company is an individual who holds a valid Kansas City, Missouri, certificate of qualification in the appropriate trade. A supervisor shall be the business owner or a full-time, managerial employee and shall serve as the qualified supervisor for only one company at a time. The qualified supervisor shall be responsible for any trades work the company performs in Kansas City, Missouri."
Three requirements in two sentences: the person must be an owner or a full-time managerial employee, the person can anchor only one company at a time, and the person carries responsibility for everything the company builds in that jurisdiction.
If you have been told that a Missouri contractor license can be "borrowed," "leased," or held by a consultant who works elsewhere, that sentence is the answer. This article explains how Missouri's designated supervisor rule works, why it exists in a state with almost no state-level licensing, and what it means operationally for a contractor trying to hold licenses in more than one Missouri market.
Why Missouri Uses This Structure at All
Missouri is one of the most decentralized licensing states in the country. There is no statewide general contractor license, no statewide plumbing license, and no statewide HVAC or mechanical license. The only trade Missouri licenses statewide is electrical, under RSMo §§ 324.900–324.945, enacted in 2017.
Everything else is municipal. Kansas City, Springfield, the City of St. Louis, St. Louis County, Columbia, Jefferson City, St. Charles County and hundreds of smaller jurisdictions each license contractors under their own ordinances.
That creates an accountability problem. If the state is not vetting anyone, and a company can incorporate in an afternoon, how does a city know the entity pulling a permit is competent? The answer every Missouri jurisdiction reached independently is the same: license the company, but tie that license to a named, examined, individually accountable human being who is actually inside the company.
That person is the designated supervisor, the Missouri version of what most of the industry calls a qualifying agent or qualifier. If the term is new to you, start with what a qualifying agent is.
The Kansas City Rule, Broken Down
Kansas City's contractor licensing operates under Chapter 18 of its Building and Rehabilitation Code (Article I, § 18-14 and Article XII), across seventeen license categories including electrical, mechanical, plumbing, pipe fitting, gas-fired appliance, fire protection, elevator, demolition, residential building, and sign.
Two licenses, not one
Contractors routinely conflate these. They are separate, with separate fees:
| | Contractor license | Certificate of qualification | |---|---|---| | Who holds it | The company | An individual | | What it does | Authorizes the business to perform the trade and pull permits | Establishes that a person is examined and qualified in the trade | | Application fee | $55 (nonrefundable) | $60 (nonrefundable) | | Issuance | $181 | No further charge for the first four years | | Renewal | $181 quadrennially | $181 quadrennially |
You need both. The company cannot pull a permit without a contractor license, and it cannot obtain a contractor license without designating a supervisor who holds a valid certificate of qualification in that trade.
What the individual must prove
To qualify for the certificate, the designated supervisor submits an application, notarized reference letters, and the $60 fee, plus exam results from a recognized examination agency such as Prometric or ICC. Development Services staff verify that the applicant:
- is at least 21 years old;
- holds a high school diploma or GED (additional experience may sometimes be substituted for the education requirement); and
- has documented the required skills, knowledge, and experience.
If the applicant has already passed a comparable examination, retesting may be unnecessary, but the applicant bears the burden of obtaining an official examination comparison from the testing agency or sponsoring jurisdiction and providing verifiable evidence of the exam date, sponsor, type, and score. Kansas City is explicit that passing the exam alone guarantees nothing: "Passage of the examination alone is no guarantee of certification; all other requirements must be deemed by the department to have been fully satisfied."
Let a certificate go unrenewed for more than two years past expiration and it becomes inactive. Requalifying means reapplying, retaking the examination, and paying all applicable fees again.
One supervisor per trade, and one company per supervisor
Kansas City requires only one formally designated qualified supervisor per licensed trade. A company may employ additional certificate holders performing tradeswork under that supervisor, and one individual may hold certificates in more than one trade, so a single person can, for example, anchor both the mechanical and pipe fitting licenses for the same company.
What that person cannot do is anchor two companies. "Shall serve as the qualified supervisor for only one company at a time" is a hard exclusivity rule, and it is the sentence that determines whether a proposed arrangement is legitimate.
Changing supervisors is a formal, deadline-driven event
When the designated supervisor changes, Kansas City requires the company to file a new application and pay the $60 application fee, plus any renewal fees owed. Changes to company name, ownership, or organization trigger more: a new application, the $60 application fee, a $181 issuance fee, an amended cash deposit, and a new insurance certificate.
All such changes must be reported in writing to City Planning & Development, Development Services within ten days.
Ten days is not much time to find, vet, and onboard a replacement qualified supervisor. That is the practical reason contingency planning matters, see what to do when your qualifier leaves.
The Same Rule, Different Paperwork, Across Missouri
Kansas City states it most clearly, but the structure repeats.
Springfield. Building Development Services certifies master and journeyman electricians, mechanics, plumbers, and gas fitters, and manages the company relationship through two forms: Master Registration and Master Resignation. A master registers to a company; when he leaves, he resigns the registration and the company's authority goes with him. The experience thresholds behind the master card are substantial, four years as a certified journeyman in the trade, or ten years of satisfactory experience, with ICC testing through Pearson VUE at a 75% passing score. Springfield's rules sit in Chapter 36, Article IV of the Land Development Code.
Jefferson City. The city requires that all plumbing work be performed by licensed plumbing contractors, and goes further than most: all personnel working for a contractor within the City of Jefferson must be licensed with the City of Jefferson City. A plumbing contractor license also requires a certificate of insurance and a minimum $5,000 surety bond. The city licenses apprentices ($14), journeymen ($117), and masters ($117) individually, and licenses the contractor entity separately ($233).
St. Louis County. The county licenses plumbing and mechanical trades through its Department of Transportation and Public Works, with a Board of Plumber and Drainlayer Examiners and applications processed through the county's ACCELA portal. As a county of the first classification, the county also operates under RSMo §§ 341.090–341.220. Verify current requirements and the county's license-assignment paperwork directly with the county.
The City of St. Louis. An independent city separate from St. Louis County, licensing plumbing and mechanical contractors through its Building Division as a prerequisite to pulling permits.
What Missouri Statutes Add
The municipal rules are not operating in a vacuum. Two state statutes reinforce the same principle.
RSMo § 341.200(1), the plumbing statute for counties of the first classification, requires a master plumber to post a $2,000 surety bond with one licensed corporate surety before a license issues, approved by the county counselor. The bond's conditions include workmanship and public safety, and also this: the principal "will employ licensed journeyman plumbers or licensed journeyman drainlayers in the performance of plumbing and drainlaying work." Missouri bonded the staffing promise, not just the work.
RSMo § 341.170(1) defines a master plumber partly in supervisory terms, the applicant must "possess the ability to direct other persons in the installation of plumbing and drainage." The credential presumes you are directing employees.
RSMo § 324.940(4)(6), on the statewide electrical side, lists as a cause for discipline: "Impersonation of any person holding a license or allowing any person to use his or her license." Discipline can mean censure, probation up to five years, suspension up to three years, or revocation, and a revoked licensee waits at least a year before reapplying. The first time Missouri built a statewide trade license, it wrote license-lending into the statute as a revocable offense.
Even SB 957 (2026), the statewide mechanical contractor bill that stalled in committee this session, as substantially similar bills have in nine consecutive sessions since 2018, would require a company performing mechanical work to have at least one statewide licensee "in its employ." Every version of Missouri contractor licensing, enacted or proposed, municipal or statewide, is built on employment.
Why This Kills the "Rented License" Model
Put the requirements side by side and the arrangement people sometimes propose, paying a licensed individual a monthly fee to attach his name to your company while he works full time somewhere else, fails on multiple independent grounds:
- He is not a full-time managerial employee. Kansas City's rule is not satisfied by a contractor relationship or a part-time consulting arrangement.
- He is probably already someone's supervisor of record. The one-company-at-a-time rule means a person who is "available to qualify several companies" is, by definition, not available.
- He is on the hook for work he is not supervising. Kansas City makes the qualified supervisor responsible for any tradeswork the company performs in the city. A name-only qualifier is accepting unlimited liability for jobs he never sees.
- Missouri has already named the conduct. Section 324.940 calls allowing another person to use your license a disciplinary offense.
The downside is not theoretical: the company loses the license and the ability to pull permits, the individual loses the credential he spent years earning, and open permits stop. We covered the general case in is it legal to rent a contractor license.
The Legitimate Version: Employ the Qualifier
The legal structure is not complicated, it is the one the ordinances describe. The qualified individual becomes a genuine, full-time, W-2 employee of your company, in a managerial role, exclusively, actually responsible for the tradeswork.
That is exactly how The Licensing Company places qualifying agents. A qualifier we place is a full-time W-2 employee of your company, on your payroll, with the responsibility and authority the ordinance assumes. Never a percentage of contract value, never a per-project fee, never a flat monthly license rental, never a 1099.
Missouri's rules are unusually well suited to this model precisely because they are so explicit about it. There is no ambiguity to manage: Kansas City tells you the person must be a full-time managerial employee serving one company. You either satisfy that or you do not.
Missouri is not alone in writing the employment requirement into law. Wisconsin requires a dwelling contractor to "hold or engage, as an employee," a certified dwelling contractor qualifier. Hawaii uses a responsible managing employee. New Jersey goes further and requires documented ownership through its bona fide representative rule. The details differ; the direction is consistent.
Frequently Asked Questions
What is a designated supervisor in Missouri? A designated supervisor is the individual who holds a municipal certificate of qualification in a trade and is formally designated as the qualified person for a licensed contracting company. Kansas City requires the supervisor to be the business owner or a full-time managerial employee, to hold a valid certificate in the appropriate trade, to serve only one company at a time, and to be responsible for all tradeswork the company performs in the city. Other Missouri jurisdictions use different terms, Springfield calls it a registered master, for the same role.
Can a designated supervisor work for more than one company in Missouri? Not in Kansas City. Its rule is that a qualified supervisor "shall serve as the qualified supervisor for only one company at a time." The individual may hold certificates in multiple trades and anchor multiple trade licenses for the same company, but not multiple companies. Assume the same exclusivity in other Missouri jurisdictions unless the authority confirms otherwise in writing.
Does the designated supervisor have to be an owner? No. Kansas City permits either the business owner or a full-time, managerial employee. Missouri is meaningfully more flexible here than New Jersey, which requires documented ownership for its plumbing and HVACR bona fide representatives. In Missouri, employment is sufficient, which is what makes placing a qualifier as a W-2 employee workable.
What happens if my designated supervisor quits? Your company loses the qualification behind the license until you designate a replacement. Kansas City requires a new application, a $60 application fee, any renewal fees owed, and written notice within ten days. Springfield handles it through a Master Resignation form. Until a qualified replacement is in place, you cannot pull permits in that jurisdiction, and open work can stall.
How much does it cost to have a qualifying agent serve as my Missouri designated supervisor? There is no single figure. Cost depends on how many Missouri jurisdictions you need covered, which trade categories, the scope and risk of the work you are bidding, your volume, and how long you need the engagement. Anchoring one Kansas City mechanical license is a different engagement from covering Kansas City, Springfield, and St. Louis County at once. Tell us what you need to cover and we will scope it.
Is Missouri getting a statewide license that would end all of this? Not yet. SB 957 (2026) would have created statewide mechanical contractor, journeyman, and apprentice licenses, but it was referred to committee and went no further before the session adjourned; substantially similar bills have failed in nine consecutive sessions since 2018. Notably, even that bill would require a company to have a licensee "in its employ", the employment requirement survives every draft.
What to Do With This
If you are a contractor: identify every Missouri jurisdiction where you will pull a permit, find out which trade categories your scope actually touches, and make sure you have a qualified individual who is genuinely employed full time, exclusively, in each one. Build a bench before you need it, the ten-day notice window is not enough time to start a search.
If you are a licensed master electrician, plumber, or mechanic in Missouri: your certificate is a durable asset, and companies expanding into Kansas City, Springfield, or the St. Louis metro need exactly what you hold. See becoming a qualifying agent.
For the trade-by-trade Missouri detail, see our guides to plumbing licensing in Missouri, HVAC and mechanical licensing in Missouri, and electrician licensing in Missouri, or the Missouri contractor licensing overview. To have a qualifier placed on your payroll, start at hire a qualifying agent.
Verified against the Kansas City, Missouri Contractor Licensing & Certification Requirements bulletin (City Planning & Development, Development Services), the City of Springfield Trade Certifications program, the City of Jefferson plumbing licensing requirements, RSMo §§ 341.170, 341.200, and 324.940, and Missouri Senate bill records for SB 957 (2026), as of August 2026. Fees and requirements are set by the issuing city or county and are subject to change, verify with the licensing authority before relying on any figure here.
Disclaimer: This article is provided for educational and informational purposes only. It does not constitute legal advice, licensing guidance, or an offer of services. Licensing requirements vary by jurisdiction. For specific compliance questions, contact The Licensing Company for a confidential consultation.