Missouri HVAC license requirements and insurance

Who it applies to

1Who needs a heating and air conditioning license in Missouri? What is this?

Mechanical contractor business license (Springfield): any business that takes heating and cooling jobs in Springfield

License	Who needs it	What it covers
Master Mechanical certificate (Springfield)	The person who stands behind a heating and cooling business in Springfield. Each mechanical contractor must name one certified master who works for it full time and supervises the work	Mechanical work, meaning heating, cooling and ventilation, inside the City of Springfield. Gas piping needs a separate Master Gas certificate
Master Gas certificate (Springfield)	Anyone who stands behind gas piping work in Springfield, such as the gas line to a furnace	Gas fitting in Springfield. It is a separate certificate from the mechanical one
Journeyman Mechanical certificate (Springfield)	Anyone doing heating and cooling work in Springfield for a contractor, without a master on the spot	Mechanical work in Springfield under a mechanical contractor. You cannot be the registered master for a business with this alone
Mechanical contractor business license (Springfield)	Any business that takes heating and cooling jobs in Springfield	The city business license, from the Finance Department. It sits on top of the master certificate
Kansas City mechanical contractor license	Any business taking heating, cooling or ventilation jobs in Kansas City	Heating, duct and ventilation systems, refrigeration work where refrigerant pipe is cut into, and pipe insulation. It also covers the gas line from the nearest cutoff valve to a warm air furnace burner. Low-voltage wiring up to 48 volts is included when it is not in conduit
St. Louis County and the City of St. Louis	Anyone doing heating and cooling work in those places	Each sets its own rules for mechanical work. We have no fee, bond or insurance amount for either

License

Who needs it

What it covers

Master Mechanical certificate (Springfield)

The person who stands behind a heating and cooling business in Springfield. Each mechanical contractor must name one certified master who works for it full time and supervises the work

Mechanical work, meaning heating, cooling and ventilation, inside the City of Springfield. Gas piping needs a separate Master Gas certificate

Master Gas certificate (Springfield)

Anyone who stands behind gas piping work in Springfield, such as the gas line to a furnace

Gas fitting in Springfield. It is a separate certificate from the mechanical one

Journeyman Mechanical certificate (Springfield)

Anyone doing heating and cooling work in Springfield for a contractor, without a master on the spot

Mechanical work in Springfield under a mechanical contractor. You cannot be the registered master for a business with this alone

Mechanical contractor business license (Springfield)

Any business that takes heating and cooling jobs in Springfield

The city business license, from the Finance Department. It sits on top of the master certificate

Kansas City mechanical contractor license

Any business taking heating, cooling or ventilation jobs in Kansas City

Heating, duct and ventilation systems, refrigeration work where refrigerant pipe is cut into, and pipe insulation. It also covers the gas line from the nearest cutoff valve to a warm air furnace burner. Low-voltage wiring up to 48 volts is included when it is not in conduit

St. Louis County and the City of St. Louis

Anyone doing heating and cooling work in those places

Each sets its own rules for mechanical work. We have no fee, bond or insurance amount for either

Who runs it

2Who issues HVAC contractor licenses in Missouri? What is this?

Missouri has no state heating and cooling board. Your city or county licenses you. In Springfield it is Building Development Services and the Building Trades Examination and Certification Board issues HVAC licenses in Missouri.

See how this compares in every state: How to check a contractor's license, state by state

Name	Missouri has no state heating and cooling board. Your city or county licenses you. In Springfield it is Building Development Services and the Building Trades Examination and Certification Board
Website	springfieldmo.gov
Look up a license	springfieldmo.gov
The law	None at state level for heating and cooling work. Springfield uses chapter 36, article IV of its city code
The rulebook	None at state level. Each city or county sets its own
Does the state license this trade?	None. Missouri does not issue a heating, cooling or mechanical contractor license

Cities call this trade mechanical work. St. Louis County and Kansas City each run their own mechanical license. Do not assume one place accepts another's license. Ask the building department where the job is before you quote.

Checked by a person against the official page

·3 official pages

Getting licensed

3How to become an HVAC contractor in Missouri What is this?

Missouri has 6 licenses that matter to an HVAC contractor: Master Mechanical certificate (Springfield), Master Gas certificate (Springfield), Journeyman Mechanical certificate (Springfield), Mechanical contractor business license (Springfield), Kansas City mechanical contractor license, St. Louis County and the City of St. Louis. Each is below, with what you need before you apply.

License	Experience required	Training required	Exam
Master Mechanical certificate (Springfield)	Four years as a certified journeyman in mechanical work, or ten years of satisfactory mechanical experience	None listed by the city	Yes, an International Code Council exam taken through Pearson VUE. You need 75 percent. The board must approve you first, and the approval lasts one year
Master Gas certificate (Springfield)	Four years as a certified gas journeyman. Or four years as a certified master in mechanical or plumbing work plus two years as a gas journeyman	—	Yes, an International Code Council exam through Pearson VUE. You need 75 percent
Journeyman Mechanical certificate (Springfield)	Four years under the supervision of a master in mechanical work, or six years of mechanical experience	—	Yes, an International Code Council exam through Pearson VUE. You need 75 percent
Mechanical contractor business license (Springfield)	—	—	—
Kansas City mechanical contractor license	The city checks your skills, knowledge and experience from your application and reference letters. It does not print a number of years	—	Yes, through a recognized exam company such as Prometric or the International Code Council. A comparable exam you have already passed may be accepted instead
St. Louis County and the City of St. Louis	—	—	—

License

Experience required

Training required

Exam

Master Mechanical certificate (Springfield)

Four years as a certified journeyman in mechanical work, or ten years of satisfactory mechanical experience

None listed by the city

Yes, an International Code Council exam taken through Pearson VUE. You need 75 percent. The board must approve you first, and the approval lasts one year

Master Gas certificate (Springfield)

Four years as a certified gas journeyman. Or four years as a certified master in mechanical or plumbing work plus two years as a gas journeyman

—

Yes, an International Code Council exam through Pearson VUE. You need 75 percent

Journeyman Mechanical certificate (Springfield)

Four years under the supervision of a master in mechanical work, or six years of mechanical experience

—

Yes, an International Code Council exam through Pearson VUE. You need 75 percent

Mechanical contractor business license (Springfield)

—

Kansas City mechanical contractor license

The city checks your skills, knowledge and experience from your application and reference letters. It does not print a number of years

—

Yes, through a recognized exam company such as Prometric or the International Code Council. A comparable exam you have already passed may be accepted instead

St. Louis County and the City of St. Louis

—

What it costs

4How much does an HVAC license cost in Missouri? What is this?

The government fees on this page add up to about 75 in Missouri. Add insurance, tools, and a vehicle to get the real number.

License	Application	First certificate	Renewal	Renewal, yearly	Charged when the license is granted
Master Mechanical certificate (Springfield)	—	$50	—	$50	—
Master Gas certificate (Springfield)	—	$50	—	$50	—
Journeyman Mechanical certificate (Springfield)	—	$25	—	$25	—
Kansas City mechanical contractor license	$55	—	$181	—	$181

Added up

Government fees, added up	75

Springfield city fees only, from a fee sheet dated 2024. Does not include the exam fees of about $125 each, a gas certificate, the EPA 608 test, the city business license, a bond, insurance premiums, tools, a vehicle, or permits. Other cities and counties charge their own fees.

Our estimate

Insurance

5How much HVAC insurance do you need in Missouri? What is this?

Missouri sets no minimum liability insurance for this license. Customers and general contractors usually ask for $1,000,000 anyway. Workers' comp is required.

Minimum liability insurance	None required by the state
Type of policy	None set by the state, because the state does not license heating and cooling contractors
Who this applies to	Nobody at state level. Your city or county sets its own amount before it licenses you or lets you pull permits
Who must be named on the certificate	Not applicable at state level
City rules	Kansas City does not list mechanical contractors among the trades it asks for an insurance certificate or a cash deposit. Springfield asks for proof of a bond, insurance, or both, and prints no amount. St. Louis County sets its own, which is not on a page we could open
Workers' comp required?	Yes, once you have one employee, because installing and repairing building systems is construction work
Workers' comp: what to know	Most Missouri businesses need workers' comp at five employees. Construction is the exception. If you build, alter, repair or tear down buildings, one employee is enough. A sole owner or a partner is not covered by the policy unless they ask the insurer to add them.
Workers' comp: who counts as an employee	Everyone you pay counts, whether they are part time, casual, full time or a member of your family. Members of an LLC and officers of a corporation count too. A sole owner and the partners in a partnership do not count themselves. In construction the number is one, so the count rarely matters
Workers' comp: if you skip it	Knowingly going without cover is a class A misdemeanor. You also owe the state up to three times the yearly premium you skipped, or up to $50,000, whichever is more. A second offense is a class E felony

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·5 official pages

Money checks

6Does Missouri check your credit for an HVAC contractor license? What is this?

Missouri does not check your credit for this license.

Credit score you need	None. The state has no heating and cooling license, so there is no state money check. Springfield's application asks about your experience, not your credit
If your score is lower	Not needed
How we know	The Springfield application packet runs to four pages and asks for your name, your trade and your work history. It has no question about credit, net worth or a financial statement

Checked by software against the official page·springfieldmo.gov

Bonds

7Does an HVAC contractor need a bond in Missouri? What is this?

Missouri does not require a state bond for this license. Some cities ask for one before they issue permits.

Does the state require a bond?	No
Amount	Not listed yet

The state does not ask for a bond (a promise, backed by an insurance company, that customers can be paid if you do not finish the job). Cities and counties do. Springfield asks for proof of a bond, insurance, or both, and its page gives no amount. Ask your city before you quote.

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·3 official pages

Federal rules

8Federal rules that also apply What is this?

Rules from the US government that apply to an HVAC contractor in Missouri on top of the state's own.

EPA refrigerant certification	Anyone who opens a system that holds refrigerant needs the federal EPA Section 608 card. That covers adding or removing refrigerant and hooking up gauges. Missouri does not issue it, and no city certificate replaces it. An apprentice working under close supervision is let off
Card types	Type I covers small appliances. Type II covers high-pressure systems, which is most home and business air conditioning. Type III covers low-pressure systems. Universal covers all three
How long it lasts	For life. The card does not expire. You take the test from a testing body the EPA has approved

Checked by a person against the official page·epa.gov

Showing your number

9Where must a Missouri HVAC contractor show the license number? What is this?

In Missouri: no state rule, because there is no state heating and cooling license number. Your city or county decides where its license number must appear.

The rule	No state rule, because there is no state heating and cooling license number. Your city or county decides where its license number must appear
On quotes, contracts, and invoices	Nothing at state level, because there is no state license. Ask the city that licenses you
On ads	Nothing at state level. Some cities set their own rule, so ask the one that licenses you
On your vehicles	No state rule. Ask your city
If you forget	Set by your city or county
City rules	Springfield gives each certified master a certificate number that starts with BTC. We found no Springfield page saying where it must be shown

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·2 official pages

Tax

10Does an HVAC contractor charge sales tax on labor in Missouri? What is this?

In Missouri, no sales tax. The state sales tax law lists what is taxed, and work on a building is not on the list. The rest of the rules are below.

See how this compares in every state: Can you charge sales tax on labor? The rule in 25 states

What this tax is	Missouri sales tax is a tax on goods and on a short list of services. The state treats a contractor as the final buyer of anything that ends up as part of a building
Who pays tax on materials	You. You pay sales tax at the supply house on furnaces, condensers, ductwork and refrigerant line you install. You do not charge the customer sales tax on them. This holds when ownership passes to the customer after you install, which is the normal case
Labor	No sales tax. The state sales tax law lists what is taxed, and work on a building is not on the list
Homes versus businesses	No difference. The rule looks at whether the equipment becomes part of the building, not at who owns the building
New buildings	The same as repairs. You pay tax on the equipment and materials when you buy them and charge none on your bill
Selling and installing as two prices	If your contract passes ownership of a unit to the customer before you install it, you are selling goods. You buy it tax-free and charge the customer sales tax on it. If you also sell parts over the counter, buy stock with a resale certificate and pay the tax yourself on anything you pull for a job
Tax-exempt customers	A city, school, church or charity can give you a project exemption certificate. With it you buy the materials for that job tax-free. Tools and equipment you keep are still taxed
Tax rate	4.225 percent for the state. The sales tax law sets 4 percent and the state constitution adds 0.225 percent for conservation and for parks and soils. Cities, counties and special districts charge more on top, so check the rate for the job address

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Getting paid

11Getting paid: lien and notice deadlines for a Missouri HVAC contractor What is this?

If you are not paid in Missouri, a lien on the property is your backstop, but only if your notice goes out on time: if a contractor hired you, give the owner written notice at least ten days before you file the lien (to file on September 1, deliver the notice by August 22). It must say how much you are owed and who owes it.

Who has to send a notice	Everyone, but the notice differs. If the owner hired you, you give the owner a printed warning before you are paid. If a contractor hired you, you give the owner ten days' notice before you file a lien
Written notice you must give the customer	If the owner hired you, hand over the state's Notice to Owner in 10-point bold type. It warns the owner that unpaid suppliers and workers can file a lien. Give it when the contract is signed, when equipment arrives, when work starts, or with your first invoice. Skip it and you have no lien rights at all
Send your notice by	If a contractor hired you, give the owner written notice at least ten days before you file the lien (to file on September 1, deliver the notice by August 22). It must say how much you are owed and who owes it
File your lien by	File your lien statement with the circuit court clerk in the county where the property is, within six months after the debt became due (money due on March 1 means you file by September 1)
Homes the owner lives in	On repairs or remodels to a home of four units or fewer that the owner lives in, a subcontractor or supplier needs the owner's signed consent to liens. The consent is printed in the main contract in 10-point bold type. If there is no such consent and the owner has paid the contractor in full, nobody under that contractor can lien. Where the consent was signed, paying the contractor is not a defense
About home construction	On new homes built for sale, the owner can record a notice of the planned sale at least 45 days before closing. If they do, you must record a Notice of Rights with the county recorder at least five days before the closing date. Miss it and your lien rights on that property are gone
File a lawsuit by	Six months after you file the lien. If you have not sued by then, the lien ends

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Keeping it

12How do you renew an HVAC license in Missouri? What is this?

How and when each license renews.

License	Renewal
Master Mechanical certificate (Springfield)	Every year
Master Gas certificate (Springfield)	Every year
Journeyman Mechanical certificate (Springfield)	Every year
Kansas City mechanical contractor license	Every four years

License

Renewal

Master Mechanical certificate (Springfield)

Every year

Master Gas certificate (Springfield)

Every year

Journeyman Mechanical certificate (Springfield)

Every year

Kansas City mechanical contractor license

Every four years

Renewal fees are in what the license costs. The official page for each license is linked under how you get it.

Watch out

13What catches people out in Missouri What is this?

The things people get wrong or do not expect about Missouri, in a few sentences.

There is no Missouri HVAC license to apply for. Cities and counties license the trade, mostly under the name mechanical, and Springfield, Kansas City and St. Louis County each have their own paperwork.
In Springfield the gas line is a separate trade. A master in mechanical work still needs a Master Gas certificate, or a certified gas fitter, to run gas pipe to a furnace.
The one card that works everywhere in Missouri is federal. EPA Section 608 is needed by anyone who opens a refrigerant circuit, and it never expires.
One employee is enough to need workers' comp in this trade. Most Missouri businesses get to five before the rule bites, but work on buildings counts as construction.
You pay the sales tax on a furnace or condenser when you buy it, and the state does not tax your installation labor. Most jobs end with no sales tax line on the customer's bill.

Checked by a person against the official page

·5 official pages

14Where these numbers come from

The labels under each table are explained on how to read a page.