- Portable or self contained ductless units under 2 1/2 tons of cooling or 36,000 Btu/h of heating fall outside the mechanical license rules.
- Journeyman: three years of verifiable work for a licensed mechanical contractor (2,000 hours a year), or a shorter mix of approved school hours and work. Contractor: the journeyman requirement plus one more year in the trade.
- Plan for a trade exam and a business and law exam.
- $5,000 corporate surety bond payable to the Construction Industries Board, kept on file before the contractor license is issued.
- Every year, by the last day of your birth month. Journeymen and contractors need six hours of continuing education in the 36 months before expiration.
Do you need a state license in Oklahoma?
Oklahoma licenses HVAC work at the state level through the Oklahoma Construction Industries Board (CIB). Below is what the board asks for, in the order you will run into it.
Portable or self contained ductless units under 2 1/2 tons of cooling or 36,000 Btu/h of heating fall outside the mechanical license rules.
The state bond and insurance rules for mechanical contractors are meant to take the place of city bond and insurance requirements.
Oklahoma license types for HVAC work
Oklahoma splits the work into 7 licenses. Pick the one that matches the jobs you take, since working outside its scope is the same as working without one.
| License | What it covers |
|---|---|
| HVAC/R Unlimited | Cooling, heating, sheet metal, natural gas piping and refrigeration with no size limit |
| HVAC/R Limited | Same work, but cooling systems up to 25 tons and heating up to 500,000 Btu/h per appliance |
| Limited Residential (journeyman) | New one and two family homes, up to 5 tons cooling and 150,000 Btu/h heating |
| Refrigeration | Refrigeration systems and equipment only |
| Natural Gas Piping | Gas piping from the delivery point to the appliances |
| Sheet Metal | Duct and exhaust systems |
| Process Piping and Ground Source Piping | Process piping, and heat pump loop piping (ground source needs certification, no exam) |
Steps to get licensed in Oklahoma
- Register as a mechanical apprentice with the CIB and log your hours under a licensed contractor.
- Once you have three years of verifiable work (or approved school plus work), apply for a journeyman license in your category.
- Pass the journeyman trade exam with the board's testing vendor.
- After one more year in the trade, apply for the mechanical contractor license and pay the $30 application fee.
- Pass both the business and law and the trade portions of the contractor exam.
- File the $5,000 surety bond and a certificate showing $50,000 of general liability insurance to activate the license.
Experience and other requirements
Experience. Journeyman: three years of verifiable work for a licensed mechanical contractor (2,000 hours a year), or a shorter mix of approved school hours and work. Contractor: the journeyman requirement plus one more year in the trade.
The license to apply for. Mechanical Contractor license (HVAC/R Unlimited or HVAC/R Limited).
Oklahoma HVAC exams
Trade exam. Yes. A trade exam in your license category, given by the board's third party testing vendor.
Business and law exam. Yes. Contractor applicants must pass both a business and law portion and a trade portion.
Separate from any state license, the EPA requires Section 608 certification for anyone who works on equipment with refrigerant. It is federal and applies in every state.
What it costs in Oklahoma
The board lists 7 fees along the way. These are the state's own numbers. Insurance, any bond, exam prep and your business registration come on top.
| Fee | Amount |
|---|---|
| Contractor application | $30 |
| Initial contractor license | $300 |
| Contractor renewal (yearly) | $200 |
| Journeyman application | $25 |
| Initial journeyman license | $50 |
| Journeyman renewal (yearly) | $75 |
| Apprentice application and registration | $5 and $20 |
Insurance and bond
Insurance. Active contractors need general liability insurance of at least $50,000, with the CIB listed as certificate holder.
Bond. $5,000 corporate surety bond payable to the Construction Industries Board, kept on file before the contractor license is issued.
Renewal and licenses from other states
Renewal. Every year, by the last day of your birth month. Journeymen and contractors need six hours of continuing education in the 36 months before expiration.
Reciprocity. Only where Oklahoma has a written reciprocity agreement with the other state. Check with the board for the current list.
Good to know in Oklahoma
- You can hold the contractor license as inactive and work as a journeyman with no bond or insurance.
- Apprentices must register with the CIB every year for their hours to count.
- EPA Section 608 certification is a separate federal requirement for anyone handling refrigerant.
After you are licensed
The license lets you take the work. Getting the work is the next job.
- Register the business. If you work under a name other than your own, register it where your state asks (often the Secretary of State, sometimes the county), and keep the name the same on your license, your truck and your invoices.
- Claim your Google Business Profile. It is the listing people see when they search for HVAC repair near them. Fill in your service area, hours and real photos of your work.
- Put up a website that shows the license. Customers look for it before they call. Koira builds a contractor website for you and keeps it current.
- See where you stand. The free Koira report checks how your business shows up in search and on maps against shops near you.
Where this comes from
Every fact on this page comes from the Oklahoma Construction Industries Board (CIB) and the official pages below, checked October 8, 2026. Fees and rules change, so confirm with the board before you file.
More for your trade: how HVAC companies run on Koira.