Montana HVAC License Requirements: The 2026 Contractor License, the ICEC and Mechanical Permits

Montana does not issue an HVAC license. There is no state HVAC, mechanical or refrigeration license, no HVAC journeyman card and no master HVAC tier. What changed is the business side: since January 1, 2026, a construction contractor in Montana must hold a Construction Contractor License from the Department of Labor & Industry under Title 37, chapter 45, MCA. It has no exam and nothing specific to HVAC, and a sole owner with no employees uses an Independent Contractor Exemption Certificate (ICEC) instead.

At a glance HVAC license: none. Montana has no state HVAC, mechanical or refrigeration license. Business credential: the Construction Contractor License, $70 to apply and $70 to renew, in force since January 1, 2026. Sole owner, no employees: the ICEC, $125, valid for two years. Exam: none for either credential. Refrigerant work still needs federal EPA Section 608 certification. Permits: outside certified cities, state mechanical permits under the 2021 International Mechanical Code.

New to licensing in Montana? Start with the Montana contractor license requirements, and for every other state see how to get a contractor license in each state.

What Changed on January 1, 2026

House Bill 239, passed in 2025 as Chapter 644, moved Montana from a registration system to a licensing program run by the Department of Labor & Industry, effective January 1, 2026. The Department's program page puts it plainly: "All construction contractors in the state of Montana are required to be licensed with the Montana Department of Labor & Industry." Contractors with an active registration on December 31, 2025 were converted to the new license.

The old registration statutes in Title 39, chapter 9 are now repealed or renumbered. HB 239 repealed or moved the registration sections into the new chapter, and a coordination clause in House Bill 225 (Chapter 481, Laws of 2025, also effective January 1, 2026) repealed the rest, including the penalty section, 39-9-401. Chapter 9 section numbers, its penalty amounts and the name "Construction Contractor Registration" belong to a law that is no longer in force.

Section 37-45-101 now states that the chapter exists "to protect the public health, safety, and welfare of the public through the regulation of construction contractors." The program sits with the Department's Employment Standards Division, and applications and renewals are completed online. No part of chapter 45 creates an HVAC classification.

The Construction Contractor License or the ICEC: Which One You Need

Section 37-45-102 defines a construction contractor as a person, firm or corporation that, in an independent business, offers or undertakes to "construct, alter, repair, add to, subtract from, improve, move, wreck, or demolish" for another a building or other improvement attached to real estate. An HVAC contractor installing, replacing or removing equipment attached to a building is squarely inside that definition.

The Construction Contractor License is for contractors with employees, and the Department's FAQ adds corporations and manager-managed LLCs regardless of employee count. Section 37-45-201 requires proof of compliance with workers' compensation law on the application.

The ICEC is for a person who is independently established and has elected not to carry workers' compensation on themselves. Under 39-71-417, a person who regularly and customarily performs services away from their own fixed business location must obtain an ICEC unless they carry self-elected coverage. That describes nearly every HVAC service call.

That "person" is a sole proprietor, a working member of a partnership, limited liability partnership or member-managed LLC, or a manager of a manager-managed LLC engaged in construction work as defined in 39-71-116. Section 37-45-104(24) exempts an independent contractor with no employees from the contractor license, while allowing one to register voluntarily.

Neither credential measures competence. The ICEC program page says "A test is not required to qualify for the ICEC," and the contractor license has no exam and no continuing education. The ICEC is a waiver: a holder working under it has waived all rights and benefits under the Workers' Compensation Act, per 39-71-417(7).

What an HVAC Business Needs in Montana, Credential by Credential

Notes on the table:

• Construction Contractor License: the $70 application fee is non-refundable, the renewal fee is $70, and continuing education is not required, per the Department's license information page. The fee is set by ARM 24.227.401, in force since January 1, 2026.
• ICEC: the $125 fee is non-refundable and applies to each initial application, reinstatement and renewal under ARM 24.35.121.

Who Does Not Need the Construction Contractor License

Section 37-45-104 lists 24 exemptions. These are the ones an HVAC owner is most likely to meet:

• Small jobs: casual, minor or inconsequential work with an aggregate contract price under $2,500 a job, unless it is part of a larger operation or split up to evade the chapter.
• Finished products: the sale or installation of finished products that do not become a permanent fixed part of a structure.
• Owners: an owner working on the owner's own property, unless building to sell promptly without 12 months of occupancy as a primary residence, and commercial property owners using their own employees for maintenance and repair.
• Licensed trades: an electrician or plumber licensed in Montana, operating within the scope of the license.
• Employees and sole owners: a wage employee, and an independent contractor with no employees.

An exemption from the license is not an exemption from workers' compensation law. A sole owner exempt under 37-45-104(24) still needs an ICEC or self-elected coverage.

The Licensing Steps in Order

1. Decide which credential applies: the Construction Contractor License for employers, corporations and manager-managed LLCs, or the ICEC or self-elected coverage for a sole owner with no employees.
2. Register your business name with the Montana Secretary of State if you use any name other than your own, as both Department FAQs advise.
3. Put workers' compensation in place for employees and check unemployment insurance and Department of Revenue requirements.
4. Apply online for the contractor license. Section 37-45-201 requires your Social Security number, proof of workers' compensation compliance, any federal employer identification number, and the names and addresses of partners, officers, managers or members and the registered agent. Pay the $70 fee; an application expires within one year of first submission.
5. Or apply online for the ICEC with business documentation worth 15 points for each trade you list, and pay the $125 fee.
6. Certify your refrigerant technicians under EPA Section 608 through an EPA approved certifying organization.
7. Line up licensed plumbing and electrical people if your scope includes potable water piping, water heaters or electrical installation work.
8. Check the job's jurisdiction: the city business license, and whether the city or the state issues the mechanical permit, pulled before work starts.
9. Calendar the renewals. The contractor license renews on the anniversary of issuance, with the window opening 60 days before expiration. The Department reminds ICEC holders about two months before expiration. Report ownership, business name and officer changes within 30 days under ARM 24.227.2301.

How the ICEC Application Works

The ICEC is not a ten minute form. Applications and renewals are filed online, with payment by debit card, credit card or bank account. The certificate lasts two years under 39-71-417(8), and the $125 fee is paid again at each renewal.

The application is made under oath under 39-71-417(5). Since February 7, 2026, ARM 24.35.111 asks for an application bearing your signature, the fee and an executed waiver, and ARM 24.35.113 requires that waiver to be signed under oath. The notarization the rules once demanded was dropped in that amendment (MAR Notice 2025-508).

Fifteen points per trade. The applicant documents 15 points of business evidence for each trade listed; list HVAC and electrical, and you document both. The Department's checklist gives the scale:

• Up to 10 points for workers' compensation, unemployment insurance and revenue accounts for employees.
• Up to 6 points each for a qualifying contract, a general liability certificate, a signed tool list, or business tax schedules from the past three years.
• Up to 3 points each for a relevant professional license, a city or county business license, Secretary of State registration or a business bank account.
• Up to 1.5 points each for items such as a Montana construction contractor credential, invoices in the business name or a federal employer identification number.

Every item must be current, one item can count toward more than one trade, and incomplete applications may be denied.

Timing. ARM 24.35.111 requires the Department to approve or deny an application within 30 days of receipt. An incomplete or denied application is held for six months from receipt so you can supply what is missing; after that it stays denied, and you reapply and pay the $125 again.

Adding a trade later. Under ARM 24.35.117(9) you submit a complete application that meets the statute and rules, which means 15 points of documentation for the new trade under ARM 24.35.112, and the expiration date does not change. ARM 24.35.121 lets the Department charge $10 to reissue a current certificate.

It stays with you. Section 39-71-419(1)(c) bars transferring a certificate to another person or allowing another person to use one not issued to them.

Penalties Under the 2026 Law

Notes on the table:

• 37-45-302: a finding of unprofessional conduct brings a penalty of up to $5,000 and a suspension or debarment of rights to public works contracts, paid into the Uninsured Employers' Fund.
• 37-1-109: the Department can order anyone working without a required license to stop, and knowingly violating a resulting court injunction is a felony.

Unprofessional conduct under 37-45-301 includes hiring or classifying a person as an independent contractor without a required ICEC, hiring an ICEC holder for a trade not listed on the certificate, and failing to comply with workers' compensation, unemployment insurance or wage law. ARM 24.227.2301 adds failing to report ownership or name changes within 30 days and engaging a person to perform work for which the person is not licensed.

The fines under 39-71-419 climb with each violation:

They cover working without an ICEC or coverage, working under a revoked or suspended certificate, transferring or altering one, and misrepresenting your status. For employers, the Department's FAQ is direct: an employer "may not require an employee through coercion, misrepresentation, or fraudulent means to adopt independent contractor status or exert control to a degree that destroys the independent contractor relationship."

Why a 1099 Does Not Make an Installer Independent

The Department's ICEC FAQ settles a common argument in one sentence:

"Labor agreements and issuance of 1099s do not make a person an independent contractor."

Hiring someone without an ICEC or self-elected coverage "could result in the state treating the independent contractor as an employee of the hiring agent," who may then answer for injury and occupational disease claims and face penalties from the Uninsured Employers' Fund.

Under 39-71-417(7), a person works under an ICEC only when performing the trade listed on it and when there is no agreement that the person is really an employee. For a licensed contractor, misclassification is also unprofessional conduct under 37-45-301(1)(d). Paper does not create the relationship; conduct does.

What Hiring a Licensed Contractor Protects a General Contractor From

Section 37-45-202 gives the hiring party a concrete reason to check your license. A person who engages a construction contractor "licensed under this chapter on the date of the contract" is not liable as an employer for workers' compensation coverage under 39-71-405, for unemployment insurance, or for wages and fringe benefits of that contractor, its employees or any later subcontractor.

Without that protection, 39-71-405(1) makes an employer who contracts out regular work liable for benefits to the contractor's employees if the contractor has not complied with coverage requirements. That is why general contractors ask for a current license or ICEC number before you start: it keeps them from becoming your crew's statutory employer. The Department's Licensee Lookup System is the primary source for checking a Montana license.

State Mechanical Permits and the Codes HVAC Work Must Meet

Montana has no HVAC license, but it does regulate the installation. The Building Codes Program requires state mechanical permits for heating, ventilating, air conditioning, restaurant kitchen hoods and other mechanical systems, including gas piping, on buildings covered by state building permits and located outside cities certified to issue their own.

Who issues the permit depends on where the job sits. Certified local governments may enforce the mechanical code in their own jurisdiction, and all other areas fall under the state. For a job outside any certified city, county or town, the state is the permit authority.

In the state's jurisdiction, state law exempts farm and ranch buildings, mining buildings on mining property, petroleum refineries and pulp and paper mills other than their offices and shops, private garages for the owner's own use, and residential buildings with fewer than five dwelling units unless they serve transient guests. A permit holder must call for gas piping pressure tests, rough-in and final inspections, with 48 hours' notice before covering the work.

The permit holder answers for making sure all work under the permit meets the state building code.

Where HVAC Work Crosses Into Plumbing and Electrical Licensing

Plumbing. The Board of Plumbers licenses journeyman and master plumbers, and 37-69-301 requires a license for anyone working in the field of plumbing. The plumbing system defined in 37-69-101(7) covers potable water supply and distribution pipes, drainage and vent piping, water heaters and vents. A crew that swaps a water heater along with a furnace is working on the plumbing system as the statute defines it; our Montana plumbing license guide covers the ladder, exams and fees.

The experience rules cut across HVAC work. A journeyman needs 5 years of plumbing experience under 37-69-304, and the Board's journeyman checklist accepts documented steam fitting, hydronics and industrial piping for up to two of those years. For a master, ARM 24.180.506 says that same practice "will not be considered as acceptable experience." The master license requires 4 years as a licensed journeyman and 3 years with a master or in a supervisory role, which may run concurrently, and a year means 1,500 hours or more in a continuous 12 month period.

Electrical. The State Electrical Board licenses residential, journeyman and master electricians and issues electrical contractor licenses. Its master electrician page says an electrical contractor "must identify a full-time Montana licensed journeyman or master electrician responsible for all work done in Montana." Under ARM 24.141.505, a contractor that names a licensed journeyman as its responsible electrician receives a limited electrical contractor license, and one that names a master receives an unlimited license. Our Montana electrician license guide covers the requirements.

Licensed Montana electricians and plumbers working within their scope are exempt from the Construction Contractor License under 37-45-104(16). The Department also runs a Boiler Operator Program and an Elevator Contractors, Mechanics, and Inspectors Licensing Program, both of which can touch large mechanical scopes.

Refrigerant Work Still Needs EPA Section 608

Federal rules at 40 CFR Part 82, Subpart F require technicians who maintain, service, repair or dispose of equipment that could release ozone depleting refrigerants to be certified.

There are four types: Type I for small appliances, Type II for high and very high pressure appliances, Type III for low pressure appliances, and Universal for all of them. Tests are given by EPA approved certifying organizations, EPA does not issue the cards, and the credentials do not expire. Section 608 is a federal technician credential, not a state license; we cover the difference in EPA 608 certification vs. an HVAC license.

City Business Licenses in Billings, Missoula and Elsewhere

Section 37-45-204 makes the state's contractor licensing exclusive: a city or county may not require or issue its own registrations, licenses or bonds for the same or a similar purpose. It keeps a local government's authority to levy a general, nondiscriminatory business license fee on all businesses, so city business licenses remain.

Billings. Anyone who conducts business in the city, or is based there, needs a city business license on or before the day the business starts, even if the business sits outside the city limits. The license is renewed every year, and the city notes that most Montana cities have a business license tax ordinance with its own rules.

Missoula. A business grossing more than $6,000 a year that works inside city limits, or applies for permits there, needs a city license. Construction work takes the Contractor Business License, which expires the last day of February each year. Contractors must file a certificate of insurance showing at least $300,000 of general liability, gas fitting carries a $3,000 surety bond under Section 13.24.030, and owners and employees working on residential property submit background checks.

Other cities set their own terms, so check with the city or county clerk wherever you work. We cover the pattern in state vs. local contractor license and contractor license vs. business license.

Where a Qualifying Agent Fits for a Montana Mechanical Company

"No state HVAC license" holds only while the scope stays strictly mechanical. Once the work reaches potable water, water heaters or electrical installation work, a Montana licensing board requires a specific licensed person to stand behind the business.

On the plumbing side, unless the Board permits otherwise, ARM 24.180.505 lets a journeyman work only in the employ of a full-time master plumber of record, and a journeyman license does not authorize pulling a permit or running a plumbing business. Section 37-69-304(2) defines that employment as the master observing the journeyman's work at different times and across different levels of work. ARM 24.180.507 makes a master the master plumber of record for one business at a time and responsible for supervising all of its plumbing work, and 37-69-305(3) confines a master's license to the master's own business for permits and plumbing work.

On the electrical side, ARM 24.141.505 requires the owner of an unlimited electrical contracting business who is not a master electrician to employ one on a full-time basis, and the owner of a limited one who is not a journeyman to employ a journeyman full time. It bars a master from serving as responsible electrician for more than one unlimited contractor and a journeyman for more than one contractor, and gives ten working days to name a replacement when that person leaves.

If your company does not have that licensed person, a qualifying agent is the compliant route: a properly licensed professional hired as a full-time W-2 employee who actually supervises the work the credential covers. The Licensing Company places qualifiers that way, never as a percentage arrangement, a flat fee, a per project engagement or a 1099. That structure matches what Montana's rules describe, and the Department's position that 1099s do not make a person independent applies with equal force to the licensed person on your payroll. To add one to your company, hire a qualifying agent.

Read how the arrangement works for HVAC contractors, or see how Montana formalizes the plumbing side in its master plumber of record rule.

What It Costs to Run an HVAC Business in Montana

The government side is short: the $70 contractor license and $70 renewal, or the $125 ICEC every two years plus a possible $10 reissuance. Around them sit workers' compensation premiums for any employees, general liability coverage, EPA 608 test fees set by the certifying organization, mechanical permit fees, city business license fees, and Board of Plumbers or State Electrical Board fees if your scope reaches those trades.

Solving a licensed person problem, such as an out of state mechanical company entering Montana with plumbing scope and no Montana master on staff, has no honest flat number. It turns on which credential is missing, how fast you need to operate and how long the arrangement needs to run.

Questions Montana HVAC Owners Ask

Does Montana require an HVAC license? No. Montana issues no state HVAC, mechanical or master HVAC credential. An HVAC business needs the Construction Contractor License or, for a sole owner with no employees, an ICEC, plus mechanical permits where they apply.

What replaced Montana contractor registration in 2026? House Bill 239 replaced it with the Construction Contractor License under Title 37, chapter 45, effective January 1, 2026. Registrations active on December 31, 2025 were converted to the new license automatically.

How much does the Montana contractor license cost, and is there an exam? The application fee is $70 and non-refundable, the renewal fee is $70, and there is no exam or continuing education. The ICEC costs $125, is valid for two years and has no test either.

Can a sole owner skip the contractor license? Yes, if there are no employees. Section 37-45-104(24) exempts an independent contractor with no employees, but that owner still needs an ICEC or self-elected workers' compensation coverage.

Do I need a Montana business license? The state credential is the Construction Contractor License or the ICEC, plus Secretary of State registration for a business name other than your own. Cities add their own business licenses; Billings and Missoula both require one for work inside the city.

Do I need a permit for HVAC work in rural Montana? Often, yes. Outside certified local programs, the state Building Codes Program issues mechanical permits for covered buildings. Residential buildings with fewer than five dwelling units and farm and ranch buildings are exempt in the state's jurisdiction.

What are the penalties for getting this wrong? A licensed contractor found to have committed unprofessional conduct faces up to $5,000 and suspension or debarment from public works contracts under 37-45-302. Fines under 39-71-419 for working without an ICEC, or for forcing a worker into independent status, rise from up to $1,000 for a first violation to $5,000 for a fourth and each later one.

Does a 1099 make my installer an independent contractor? No. The Department states: "Labor agreements and issuance of 1099s do not make a person an independent contractor." If the state treats the worker as your employee, injury claims and Uninsured Employers' Fund penalties can land on you.

Do I need a plumbing or electrical license for HVAC work? It depends on scope. Water heaters and potable water piping are part of the plumbing system under 37-69-101, and electrical installation work falls under the State Electrical Board.

Do I still need EPA 608 certification in Montana? Yes, if you handle refrigerants. Section 608 is federal, does not expire and does not replace the Montana contractor license.

Talk to The Licensing Company About Montana

The Licensing Company is led by founders Marshall Schofield and Jeremiah Jaskulski, recognized authorities on contractor licensing and on qualifying agent structures that hold up in front of a state board. If your mechanical company is entering Montana with plumbing or electrical scope and needs a licensed person to stand behind that work, call 615-219-2110 or start at hire a qualifying agent.

Related reading: plumbing license Montana, electrician license Montana, how to get an HVAC contractor license, and the neighboring states Idaho, Wyoming, North Dakota and South Dakota. You can also browse guides for other states.

Last reviewed September 28, 2026. Fees, penalties and permit rules are set by the Montana Department of Labor & Industry, the Legislature, the licensing boards and local governments, and they change. Verify current requirements with the Department and the city or county where you work.

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