Missouri takes a unique approach to contractor licensing. Unlike states with a single statewide licensing board, Missouri does not require a statewide general contractor license. Instead, licensing authority is split between the state level for specific trades and local municipalities for general contracting and most specialty work. If you plan to work in Kansas City, St. Louis, Springfield, Columbia, or any other Missouri city, you will need to understand both layers of regulation.
At the state level, the Missouri Division of Professional Registration (DPR) oversees licensing for electrical contractors through the Office of Statewide Electrical Contractors (OSEC). Plumbing is governed by RSMo Chapter 341, but licensing is administered at the local level. HVAC and mechanical contractor licensing remains local as well, since the proposed Statewide Mechanical Contractor Licensing Act has not passed into law as of 2026.
This guide covers everything you need to know about contractor licensing in Missouri: the state-level trade licenses, local requirements in major cities, fees, exams, insurance, bonds, renewal, and penalties for unlicensed work.
Missouri's Licensing Structure
Missouri's contractor licensing system operates on two levels:
State-Level Licensing
The Missouri Division of Professional Registration (DPR) manages the only statewide contractor license: the Statewide Electrical Contractor License, administered through the Office of Statewide Electrical Contractors (OSEC) under RSMo Chapter 324, Sections 324.900–324.945.
There is no statewide general contractor, plumbing, HVAC, or mechanical contractor license in Missouri. Bills to create statewide mechanical contractor licensing have been introduced in multiple legislative sessions since 2018, but none have passed as of 2026.
Local (Municipal/County) Licensing
Cities and counties set their own licensing requirements for general contractors, plumbers, HVAC contractors, and other specialty trades. Major jurisdictions with their own licensing programs include Kansas City, St. Louis (both city and county), Springfield, Columbia, St. Charles County, and Jefferson City. Requirements, fees, and processes vary significantly from one jurisdiction to the next.
This dual-layer system means you may need a state electrical license plus one or more local licenses depending on where and what type of work you perform.
Types of Contractor Licenses
State-Level License
- Statewide Electrical Contractor License — Required for any person or company performing electrical contracting work across Missouri. Administered by OSEC through the DPR. Political subdivisions must recognize this license in lieu of a local electrical license under RSMo 324.925.
Common Local License Types
While specific categories vary by city, most Missouri municipalities issue licenses in these trade categories:
- General Contractor — Building construction, remodeling, and renovation
- Electrical Contractor — Local licensing may still apply alongside the state license for permitting purposes
- Plumbing Contractor — Master plumber and journeyman plumber certifications
- Mechanical/HVAC Contractor — Heating, ventilation, air conditioning, and refrigeration
- Gas Fitter — Natural gas piping and appliance installation
- Roofing Contractor
- Demolition Contractor
- Excavation/Grading Contractor
- Pool/Spa Contractor
- Drainlayer — Sewer and drainage installation
Plumber Classifications (RSMo Chapter 341)
Although administered locally, Missouri statute defines two plumber classifications:
- Master Plumber — Must be at least 25 years old with 3+ years as a licensed journeyman plumber. Must demonstrate ability to direct others and have thorough knowledge of plumbing design and installation.
- Journeyman Plumber — Must be at least 21 years old with 5+ years of apprentice experience under a licensed master plumber.
State-Level Electrical Contractor License
The statewide electrical contractor license is Missouri's only true state-level contractor license, and it deserves detailed coverage.
Administering Agency
The Office of Statewide Electrical Contractors (OSEC), within the Division of Professional Registration, manages all statewide electrical licensing. Applications are processed through the MOPRO licensing portal, launched January 2025.
Experience Requirements
Applicants must meet one of the following pathways:
- Standard path: 12,000 verifiable practical hours installing equipment and associated wiring
- Apprenticeship path: 10,000 verifiable practical hours plus a journeyman certificate from a U.S. Department of Labor-approved electrical apprenticeship program
- Degree path: 8,000 verifiable practical hours plus an associate's degree from a state-accredited electrical program
Alternative Qualification (Existing Local License Holders)
If you hold an electrical contractor or master electrician license from a Missouri political subdivision, you may qualify if you can provide:
- Evidence of 12,000 hours of experience, OR
- Evidence of having been licensed for six of the previous eight calendar years, along with evidence of passing an examination based on the National Electrical Code
Insurance Requirement
Applicants must carry general liability insurance with a minimum of $500,000 in coverage.
Bond Requirement
You must post a bond with each political subdivision in which you perform work, as required by that jurisdiction.
Exam Requirement
You must pass a standardized, nationally accredited electrical assessment examination created and administered by a third party. Approved options include the NASCLA Accredited Exam for Electrical Contractors and exams administered by Prometric and ProV.
Application Fee
The application fee is $200, submitted through the MOPRO portal.
Contact
Phone: 573-522-3280 | Email: OSEC@pr.mo.gov
Local Licensing Requirements by City
Kansas City
Kansas City has one of the most structured contractor licensing programs in Missouri. The Department of City Planning & Development manages contractor licensing through CompassKC.
Process
- Obtain a business license from the Finance Department
- Apply for a Certificate of Qualification (professional license) in your trade(s) through CompassKC
- Once you have both, apply for the Contractor License for your business through CompassKC
Requirements
- Must be at least 21 years old
- Must possess a high school diploma or GED
- Must designate a full-time, qualified supervisor who has passed an exam accredited by Prometric or ICC
- General liability insurance: minimum $1,000,000 per occurrence, with the City of Kansas City listed as additional insured
Fees
- Application fee: $55
- License issuance: $167
- Renewal (every 4 years): $167
Contact
Email: cdlicensing@kcmo.org | Phone: (816) 513-1500 ext 1, option 2
St. Louis (City)
In the City of St. Louis, all contractors and subcontractors must obtain a Graduated Business License.
Process
- Register for a state sales tax number through the Missouri Department of Revenue
- Obtain the Graduated Business License application from the License Collector's office or download it online
- Get a statement of clearance from the Collector of Revenue's office
- Obtain an occupancy permit from the Building Division of the Department of Public Safety
- Provide proof of workers' compensation coverage (or sign an exemption statement)
Additional Requirements
- All general contractors must furnish a list of subcontractors on every job to the License Collector
Contact
Collector of Revenue's Office: City Hall Room 410, 1200 Market St., St. Louis, MO 63103 | Phone: (314) 622-3291
St. Louis County
St. Louis County issues certificates of qualification for electrical, plumbing, and mechanical (HVAC) professionals through its Department of Transportation and Public Works. Applications are processed through the county's ACCELA licensing portal.
Springfield
The City of Springfield requires trade certifications for electricians, plumbers, gas fitters, and mechanical contractors. Tests are sanctioned by Building Development Services and administered by a private testing firm on a regular schedule.
Requirements
- Complete the city application for each trade
- Submit employer verification forms documenting job duties and time worked
- Pass the trade-specific certification exam
- Electrical, gas fitting, mechanical, and plumbing contractors must provide proof of bond and insurance
- Contractors with workers' compensation policies must submit proof as a condition of licensing
License Verification
Springfield offers online verification at springfieldmo.gov or by calling 417-864-1617.
St. Charles County
St. Charles County requires licenses for electricians, plumbers, mechanical (HVAC) contractors, pool installers, drainlayers, third-party inspectors, and blasters before performing any work that requires a permit.
- All licensed contractors must be bonded and insured
- Surety bond: $10,000
General Licensing Requirements
While requirements vary by jurisdiction, here are the common elements you will encounter across Missouri:
Experience
- State electrical license: 8,000–12,000 hours depending on education and apprenticeship credentials
- Master plumber (RSMo 341): 3+ years as a licensed journeyman
- Journeyman plumber (RSMo 341): 5+ years as an apprentice under a master plumber
- Local general contractor: Varies by city. Kansas City requires a designated qualified supervisor; Springfield requires employer verification of experience
Education
- Kansas City requires a high school diploma or GED
- The state electrical license allows reduced experience hours with an associate's degree
- Most local jurisdictions do not mandate specific educational degrees beyond trade competence
Age
- State electrical license: No specific minimum stated in statute
- Kansas City contractor license: 21 years old
- Master plumber (state statute): 25 years old
- Journeyman plumber (state statute): 21 years old
Background Checks
Background check requirements are set by individual municipalities. Check with your local licensing authority for specific requirements.
Examination Requirements
State Electrical Contractor Exam
Applicants for the statewide electrical contractor license must pass a standardized, nationally accredited electrical assessment examination. The exam must be created and administered by a third party meeting current national industry standards.
Approved Exam Options
- NASCLA Accredited Exam for Electrical Contractors — Widely accepted across multiple states. Passing this exam can facilitate licensing in other NASCLA-participating states.
- Prometric exams — Offered at testing centers throughout Missouri
- ProV exams — Another approved third-party testing provider
Exam Content
Exams are based on the National Electrical Code (NEC) and cover electrical theory, code compliance, installation practices, safety, and project management.
Local Trade Exams
Municipal licensing programs require their own trade exams:
- Kansas City: Supervisors must pass exams accredited by Prometric or ICC (International Code Council)
- Springfield: Exams for electricians, plumbers, gas fitters, and mechanical contractors are sanctioned by Building Development Services and administered by a private testing firm
- St. Louis County: Trade-specific exams for electrical, plumbing, and mechanical qualifications
Exam Preparation Resources
License Fees and Costs
State Electrical Contractor License (OSEC)
| Fee Type | Amount |
|---|---|
| Application/Initial License Fee | $200 |
| Triennial Renewal Fee | $200 |
Kansas City Contractor License
| Fee Type | Amount |
|---|---|
| Application Fee | $55 |
| License Issuance | $167 |
| 4-Year Renewal | $167 |
Other Cost Considerations
| Item | Typical Cost |
|---|---|
| NASCLA Electrical Exam | $150–$300 (varies by provider) |
| General Liability Insurance ($1M) | $500–$3,000/year (varies by trade and revenue) |
| Surety Bond ($10,000) | $100–$200/year |
| Exam Prep Courses | $100–$500 |
| Local Business License | $50–$350 (varies by city) |
Fees for local licenses vary significantly. Contact your city or county licensing office for exact amounts.
Insurance and Bond Requirements
General Liability Insurance
- State electrical license: Minimum $500,000 in liability coverage required by OSEC
- Kansas City: Minimum $1,000,000 per occurrence, with the city named as additional insured
- Market standard: Most commercial construction contracts in Missouri require $1,000,000 per occurrence
Workers' Compensation Insurance
Missouri has a critical rule for construction employers under RSMo Chapter 287:
- Construction industry: Workers' compensation is required with one or more employees
- All other industries: Required with five or more employees
- Sole proprietors and partners may elect coverage but are not automatically covered
- Any city or county issuing a contractor business license must require a certificate of workers' compensation insurance or a signed exemption affidavit
Penalty for non-compliance: Operating without required workers' compensation coverage is a Class A misdemeanor under RSMo 287.280 and exposes the employer to direct civil liability.
Surety Bonds
Bond requirements are set at the local level in Missouri:
- St. Charles County: $10,000 surety bond for all licensed contractors
- State electrical license: Bond required in each political subdivision where you perform work, with amounts set by that jurisdiction
- Public works projects: Performance and payment bonds required under RSMo 107.170
Most Missouri contractor license bonds cost $100–$200 per year for a $10,000 bond with good credit.
License Renewal
State Electrical Contractor License
- Renewal cycle: Every 3 years (triennial)
- Expiration date: September 30 of every third year
- Renewal fee: $200
- Continuing education: Not currently required by OSEC at the state level
- Renewal portal: MOPRO
Local License Renewal
Renewal cycles vary by jurisdiction:
- Kansas City: Renew every 4 years at $167
- Springfield, St. Louis, St. Charles County: Varies; check with your local licensing office
Continuing Education
Missouri does not mandate continuing education at the state level for its electrical contractor license. However, some local jurisdictions impose their own CE requirements. For example, some counties require 24 hours of CE per three-year renewal period for electricians, with at least 16 hours related to the NEC and up to 8 hours in safety-related courses. Always confirm CE requirements with your local licensing authority.
Late Renewal and Reinstatement
Letting your license expire can result in late fees, additional paperwork, and potential re-examination. Contact your licensing authority immediately if your renewal date has passed.
Reciprocity with Other States
NASCLA Accredited Electrical Examination Program
Missouri participates in the NASCLA Accredited Electrical Examination Program. Passing the NASCLA electrical exam in Missouri can facilitate licensing in other participating states without retaking the trade exam.
States Accepting the NASCLA Electrical Exam
As of 2026, the following states participate in or accept the NASCLA Accredited Electrical Exam:
- Alabama
- Arizona
- District of Columbia
- Florida
- Idaho
- Kentucky
- Louisiana
- Mississippi
- Nebraska
- New Mexico
- North Carolina
- South Carolina
- Tennessee
- Utah
- Virginia
- West Virginia
Important: Passing the NASCLA exam does not create a national license. Each state maintains its own requirements for background checks, financial documentation, applications, and any state-specific business and law examination. You must still apply individually in each state where you want to work.
General Contractor Reciprocity
Since Missouri does not issue a statewide general contractor license, there is no state-level reciprocity for general contracting. Local jurisdictions may or may not recognize licenses from other Missouri cities. You must apply separately in each municipality where you intend to work.
How to Verify a Contractor's License
State-Level Verification (Electrical Contractors)
Use the Missouri Division of Professional Registration's online search tool to verify statewide electrical contractor licenses:
- MOPRO License Search: mopro.mo.gov/license/s/license-search
- Legacy Search: pr.mo.gov/licensee-search.asp
You can search by name, license number, profession type, or location. Results show whether a license is active, expired, suspended, or revoked.
Local Verification
For local contractor licenses, check with the issuing municipality:
- Kansas City: kcmo.gov contractor licensing page
- St. Louis (City): stlouis-mo.gov business license search
- Springfield: springfieldmo.gov license confirmation or call 417-864-1617
Division of Professional Registration Contact
Missouri Division of Professional Registration
3605 Missouri Boulevard
P.O. Box 1335
Jefferson City, MO 65102-1335
Phone: 573-751-0293
TTY: 800-735-2966
Email: profreg@pr.mo.gov
Penalties for Working Without a License
Because Missouri's licensing is split between state and local levels, penalties depend on the type of work and jurisdiction.
State-Level Penalties (Electrical Work)
Under RSMo Chapter 324, the Division of Professional Registration can impose:
- Civil penalties: Up to $5,000 per offense
- Daily fines: Each day of a continued violation constitutes a separate offense
- Maximum penalty: Up to $25,000 for ongoing violations
- Disciplinary action: Probation, suspension, or revocation of existing licenses
Criminal Penalties
Criminal violations involving fraudulent licensure claims, performing work while unlicensed after prior enforcement, or conditions resulting in injury may be prosecuted as a misdemeanor or felony under Missouri criminal statutes.
Workers' Compensation Violations
Operating without required workers' compensation insurance is a Class A misdemeanor under RSMo 287.280, punishable by fines and potential jail time.
Local Penalties
Cities and counties impose their own penalties for unlicensed work, which can include:
- Fines (amounts vary by municipality)
- Stop-work orders
- Denial of building permits
- Required removal or correction of work at the contractor's expense
Consumer Protection
Missouri's Merchandising Practices Act (RSMo Chapter 407) provides additional consumer protections:
- Home Solicitation Sales Act (RSMo 407.700–407.720): Homeowners have a cooling-off period to cancel contracts signed during door-to-door solicitation
- Insurance-related repairs (RSMo 407.725): Homeowners can cancel contractor agreements within five business days after learning a claim is not covered by insurance. Contractors are prohibited from negotiating insurance claims on behalf of homeowners for roofing or exterior repair work.
Frequently Asked Questions
Do I need a state license to do general contracting in Missouri?
No. Missouri does not issue a statewide general contractor license. However, most cities and counties require a local business license and/or contractor license. You must check the requirements in every municipality where you plan to work.
What is the only statewide contractor license in Missouri?
The Statewide Electrical Contractor License, administered by the Office of Statewide Electrical Contractors (OSEC) under the Division of Professional Registration. Under RSMo 324.925, all political subdivisions must recognize this license.
Do I need a separate license for every city I work in?
For general contracting, plumbing, HVAC, and most trades: yes, potentially. Each municipality sets its own requirements. For electrical work, the statewide OSEC license is recognized across all Missouri jurisdictions, though you may still need to post a local bond and obtain permits.
Is there a statewide HVAC or mechanical contractor license?
No. As of 2026, the Statewide Mechanical Contractor Licensing Act has not passed the Missouri legislature. HVAC licensing is handled at the city and county level.
How long does it take to get licensed?
Processing times vary by jurisdiction. The state electrical license can be processed within a few weeks through the MOPRO portal after all documentation and exam results are submitted. Local licenses may take anywhere from a few days (Springfield) to several weeks, depending on the city and whether board approval is required.
Can I use my Missouri electrical license in other states?
If you passed the NASCLA Accredited Electrical Exam, you may be able to use that exam score to apply for licensure in other NASCLA-participating states without retaking the trade exam. However, you must still meet each state's other requirements (application, fees, insurance, background check, etc.).
Conclusion
Missouri's contractor licensing system requires you to think locally. While the state keeps its hands off general contracting, plumbing, and HVAC licensing, the statewide electrical contractor license through OSEC provides a unified credential for electrical work across all jurisdictions. For everything else, you need to research and comply with the specific requirements of each city or county where you operate.
Start by determining which jurisdictions you will work in, then contact each one for their specific licensing requirements. For statewide electrical licensing, begin at the MOPRO portal and contact OSEC at 573-522-3280 with questions. For general questions about professional licensing in Missouri, reach the Division of Professional Registration at 573-751-0293.