How to Start an HVAC Business in Missouri (2026)

Last updated: February 25, 2026

Missouri is unusual for HVAC businesses: there is no statewide HVAC license. Unlike most states with a centralized HVAC licensing board, Missouri handles HVAC licensing entirely at the city and county level. Kansas City, St. Louis County, St. Charles, and Columbia each have their own licensing requirements, fees, and exams. The one universal federal requirement is EPA Section 608 Certification for anyone handling refrigerants. The other critical detail: HVAC is classified as construction in Missouri, which means workers’ compensation insurance is mandatory with just one employee – not the standard five-employee threshold.

HVAC Business Requirements in Missouri at a Glance

Requirement	Agency	Cost	Timeline
EPA Section 608 Certification	EPA (via approved testing centers)	$60-$120	Does not expire
Kansas City Trade License	KC Dept of Planning & Development	$60 application + $181 license (4 years)	After passing exam
St. Louis County Journeyman License	STL County Dept of Public Works	$100 (3-year term)	After passing exam
St. Louis County Contractor License	STL County Dept of Public Works	$100 + $10,000 bond	3 years after journeyman
LLC Formation	MO Secretary of State	$50 (online)	3-5 business days
Workers’ Compensation Insurance	Private Carrier	Varies by payroll	Required with 1+ employee (construction)
General Liability Insurance	Private Carrier	$500,000 minimum (KC requirement)	Before operations
Surety Bond (Contractor level)	Bonding Company	$10,000	Required for contractor license
Federal EIN	IRS	Free	Immediate (online)

How to Start an HVAC Business in Missouri (Step by Step)

Step 1: Get EPA Section 608 Certification

The EPA Section 608 Certification is required nationwide for anyone who maintains, services, repairs, or disposes of equipment containing refrigerants. This is the one requirement that applies regardless of where in Missouri you work.

Detail	Info
Exam format	80 multiple-choice questions, 3-hour time limit
Passing score	70%
Fee	$60-$120 (varies by testing center)
Types	Type I (small appliances), Type II (high-pressure), Type III (low-pressure), Universal (all types)
Duration	Does not expire – transferable across all states

Get Universal certification to cover all equipment types. Most HVAC businesses need at least Type II (covers the most common residential and commercial systems).

Step 2: Get Licensed in Your City

Since Missouri has no statewide HVAC license, you must get licensed in each city/county where you work. Here are the major jurisdictions:

Kansas City

Licensing authority: KC Department of Planning & Development
Application fee: $60
Trade license fee: $181 (4-year period)
Exam: KC Contractor’s Exam, minimum 70% passing score
Insurance: $500,000 minimum general liability
Bond: $10,000 surety bond
Renewal: Every 2 years (Dec 31 of even years), $200
Must employ a full-time qualified supervisor to oversee trade work

St. Louis County

Licensing authority: STL County Dept of Public Works
Journeyman license fee: $100 (3-year term)
Contractor license fee: $100 + $10,000 surety bond
Continuing education: 24 hours within the 3-year licensing period (minimum 6 hours core topics)
Contractor upgrade: Requires 3 additional years supervising at least 1 journeyman

St. Charles

License type: Tinner’s License (for HVAC work)
Fee: $50 initial, $50 annual renewal
Details: St. Charles County Contractor Licensing

Columbia

Board of Mechanical Examiners oversees licensing
Master Mechanic and Journeyman Mechanic categories available
Exam: Thomson Prometric or ICC National Standardized Examinations
Details: City of Columbia Board of Mechanical Examiners

Step 3: Get Your Contractor License

To run your own HVAC business (pull permits, hire technicians), you need a mechanical contractor license in most Missouri jurisdictions. Requirements vary but typically include:

Hold a journeyman license first
3 additional years of supervisory experience (must supervise at least 1 journeyman, not just apprentices)
$10,000 surety bond
No additional exam required in most jurisdictions

Journeyman requirements: Minimum 7,500 hours of combined education and work experience. Must pass an ICC (International Code Council) exam – 100 questions, 4-hour time limit, open-book, 75% passing score. Based on International Fuel Gas Code and International Mechanical Code.

Step 4: Form Your Business Entity

Register an LLC with the Missouri Secretary of State ($50 online, no annual report). Apply for a free federal EIN from the IRS.

Step 5: Get Insurance and Bonding

Workers’ compensation insurance is mandatory for all HVAC businesses with 1 or more employees. HVAC falls under Missouri’s construction industry classification, which has a stricter threshold than the general 5-employee rule. This includes part-time, seasonal, and family member employees. Non-compliance is a Class A misdemeanor with fines up to $50,000. Learn more: Missouri Division of Workers’ Compensation.

General liability insurance: Minimum $500,000 required in Kansas City and most other jurisdictions that license HVAC contractors. Industry standard is $1M per occurrence / $2M aggregate.

Surety bond: $10,000 required for contractor-level licenses in most jurisdictions.

Step 6: Register for Taxes and Start Operations

Register for sales tax, withholding tax, and employer tax accounts through MyTax Missouri. Get a city business license in each jurisdiction where you work. Report new hires within 20 days via the Missouri New Hire Reporting Center.

Cost to Start an HVAC Business in Missouri

Item	Cost	Notes
EPA Section 608 Certification	$60-$120	Universal recommended; never expires
KC Trade License (application + fee)	$241	$60 + $181, valid 4 years
STL County Journeyman License	$100	Valid 3 years
STL County Contractor License	$100	Requires $10,000 bond
Surety Bond	$10,000	Required for contractor license
LLC Formation	$50	Secretary of State (online), no annual report
Federal EIN	Free	IRS, immediate online
General liability insurance	$2,000-$5,000/year	$500K minimum (KC requirement)
Workers’ comp insurance	Varies by payroll	Required with 1+ employee
City business license	$25-$200+	Varies by city
Tools and equipment	$5,000-$15,000	Gauges, vacuum pumps, recovery equipment
Work vehicle	$15,000-$40,000	Used service van/truck

Estimated total startup cost: $15,000-$45,000+ (including vehicle and tools). The licensing costs themselves are relatively low – the major expenses are the vehicle, tools, insurance, and bonding.

Related Missouri Business Guides

← Back to all Missouri business guides

Frequently Asked Questions

Does Missouri require a state HVAC license?

No. Missouri has no statewide HVAC license. Licensing is handled at the city/county level. Kansas City, St. Louis County, St. Charles, and Columbia each have their own requirements. The only universal requirement is EPA Section 608 Certification for handling refrigerants.

What do I need for an HVAC license in Kansas City?

Kansas City requires a trade license ($60 application + $181 fee), passing the KC Contractor’s Exam (70% minimum), $500,000 general liability insurance, and a $10,000 surety bond. Renewal is every 2 years ($200). You must employ a full-time qualified supervisor.

Do I need workers’ comp for an HVAC business in Missouri?

Yes – with just 1 employee. HVAC is classified as construction in Missouri, which triggers workers’ comp at the 1-employee threshold instead of the standard 5-employee threshold. This includes part-time and seasonal workers. Non-compliance is a Class A misdemeanor with fines up to $50,000.

What is EPA 608 certification?

EPA Section 608 Certification is a federal requirement for anyone who handles refrigerants. The exam has 80 questions, requires 70% to pass, and costs $60-$120. Get Universal certification to cover all equipment types. It never expires and is valid in all 50 states.

How much experience do I need for an HVAC license in Missouri?

For a journeyman license, you need minimum 7,500 hours of combined education and work experience, plus passing an ICC exam. For a contractor license, you need the journeyman license plus 3 additional years supervising at least one other journeyman.

How much does it cost to start an HVAC business in Missouri?

Licensing and insurance costs are relatively low (a few thousand dollars), but total startup including a work vehicle and tools runs $15,000-$45,000+. Major costs: service vehicle ($15,000-$40,000), tools ($5,000-$15,000), insurance ($2,000-$5,000/year), and surety bond ($10,000).

More Missouri Business Guides

About the Author

Robert Smith has run a licensed private investigation firm for 8 years from the Florida-Georgia state line - where he learned firsthand how wildly business licensing rules differ between states just miles apart. He personally researched requirements across all 50 states and D.C., reviewing hundreds of government sources over hundreds of hours to build guides he wished existed when he started. Not a lawyer or accountant - just a business owner who has done the research so you don't have to.

Learn more about our research process