One letter on your Texas HVAC license decides the biggest job you can bid

Texas licenses air conditioning and refrigeration work at the state level through the Texas Department of Licensing and Regulation, and it is one of the few construction trades the state licenses at all. There is no state general contractor license here, no roofing license, no framing license. HVAC is on the short list, and being on the short list is the point. The state is holding a door open and counting the people who come through it.

The thing to understand before you open a single form: TDLR does not issue "an HVAC license". It issues a class and an endorsement, and those two words together are a sentence describing exactly which jobs you are allowed to sign. Get the sentence right and the license pays for itself on the first commercial replacement you win. Get it wrong and you find out on a Tuesday, standing under a 40 ton rooftop unit with the drawings in your hand, watching the job go to the shop that picked the other class.

So the class and the endorsement come first, before the hours, before the exam, before the insurance quote. Here is what each one buys, what the contractor license adds to your ability to sell, and how Texas HVAC money actually arrives across a year.

Class A or Class B, and what each one lets you bid

Two contractor classes. The difference is capacity, and capacity alone.

Class B covers the residential market and a good part of the small commercial market. Class A is the one that reaches the roof of a mid-size building and the mechanical room with a chiller in it.

The choice is not about ambition. It is about which conversations you want to be able to finish. If the work within reach of your van is replacement and service on houses and strip retail, Class B is not a smaller license, it is the same revenue on a cheaper insurance bill. If any part of your plan involves a builder's schedule, a property manager with a portfolio, or a school district, Class A is the one that keeps you in the room when somebody says the unit is 30 tons.

The class you pick changes the cover you carry. It does not change the months you have to work, the $115 application, or the exam you sit. Same road either way, and the fork is at the end of it rather than the start.

The endorsement is the other half of the sentence

Your class says how big. Your endorsement says what kind. TDLR offers three, and a license carries one of them:

Environmental Air Conditioning. Comfort heating and cooling. The air people sit in. Houses, offices, retail, schools.

Commercial Refrigeration and Process Cooling or Heating. The cold that holds product and the temperature that runs a process. Walk-in coolers, grocery racks, cold storage, food processing.

Both together. The combination endorsement is itself one endorsement, and it is how you hold the full trade on a single license.

Here is why that is a revenue decision rather than a filing decision. A restaurant is one building with two endorsements in it. The dining room is environmental air. The walk-in cooler and the reach-ins are commercial refrigeration. A shop holding only environmental air gets the call about the dining room and hands the cold side to a competitor, who then owns the relationship with the owner because they are the one who turns up when the product is at risk.

A walk-in full of stock is a call an owner cannot postpone until the budget year turns. That is a different negotiating position than a warm dining room, and the combination endorsement is what puts one truck on both halves of the building for one annual renewal.

If the work you are chasing is grocery, convenience, food service or cold storage, the combination endorsement is the one to apply for. If you are a residential and light commercial shop with no intention of chasing a walk-in, environmental air is the honest answer and there is no penalty for it.

Four years under a licensed contractor, or three if you certify first

You must be 18 to apply for the contractor license. Then TDLR gives you two doors into it, and they are not the same length.

The second route is a year of your life. Technician certification takes 24 months of work under a licensed contractor, or a department-approved certification program of 2,000 hours combining instruction and practical experience. Register as a technician in your first week, certify at 24 months, hold that certification for 12 months, and at 36 months of documented experience you can apply for the contractor license instead of waiting for 48.

The windows are on the side of anyone currently on the tools. Experience is counted inside the past 72 months or the past 48, so a technician who has been working straight through is already carrying a full count, and the license turns into a filing decision rather than a qualifying one. Add up your supervised months before you assume you are years away from it.

Two habits make the application painless. Keep a written record of months worked by employer, updated as you go, and keep the license number of the contractor who supervised them. Shops close and supervisors move. A signature that is easy to get this year is a phone hunt in 2029.

The application fee is $115, the license runs one year from the date it is issued, and once you file you have a year to finish everything in the application including the exam. That is a comfortable window when the months and the supervising license numbers are already written down somewhere.

The license is the name on the truck

The tier below the contractor license is technician registration. Anyone helping a licensed ACR contractor with maintenance or repair work registers with TDLR from the age of 16, pays $20, renews annually, works under that contractor's supervision, and may not advertise air conditioning and refrigeration services.

That last clause is the entire business case for going and getting the license, written by the state in a single line. A registered technician is somebody else's capacity. A licensed contractor is the name on the truck, the ad, the estimate, the permit and the invoice.

What the contractor license actually changes about your week:

You contract directly. Your company signs with the homeowner, the property manager or the builder, and your price is your price rather than a wage on somebody else's ticket.

You advertise. The van, the yard sign, the Google listing, the profile a general contractor searches. This is the door the license opens, and it is the one that fills the calendar.

You pull permits. Mechanical permits run through a licensed contractor, and cities register that license before they issue.

You carry technicians. The people working under you register under your license, and their hours become their own ladder. The trade builds itself downward from a contractor license.

You bill for outcomes. A replacement is a quoted number, not an hourly rate, and the difference between those two things is the margin.

The certified technician tier sits between the two, it is optional, and the year it takes off the contractor route is reason enough to take it. Twenty dollars and a form is a cheap way to start a clock that ends in a business.

Your license is a state credential in a state that issues very few

Texas has no general contractor license. No roofing license, no framing or carpentry license, no concrete, drywall, painting or flooring license. A customer comparing roofers is comparing reputations. A customer comparing HVAC shops can compare license numbers, because the state issued them.

The construction trades Texas licenses at state level:

Everything else is registered by the city or not at all, which makes the city registration matrix the licensing regime for those trades. The ladders next to yours are the electrician license, the plumbing license and what a Texas roofer actually holds.

Eight hours a year, one of them Texas law and rules

The contractor license renews annually and carries 8 hours of continuing education, one of which has to be Texas law and rules. For scale inside the same industry: TDLR electrical licenses renew annually on 4 hours, and the plumbing board asks 6.

Then the city, which is where the permit actually comes from. The state license lets you do the work. A municipal registration lets you file for the inspection.

Notice that San Antonio's residential registration asks for the same $300,000 and $600,000 that Class A already carries under 16 TAC 75.40. If you hold Class A cover, that registration costs you a form and a background check rather than a second insurance quote.

Put the license renewal, the 8 CE hours, the insurance certificate expiry and the city registration on one date in the calendar. They renew in a single sitting when they are grouped, and they turn into four separate scrambles when they are not. The certificate side of that stack is in Texas insurance certificates, and the city side is in Texas city contractor registration.

Texas pays HVAC in one long summer

The cooling season here is long and the demand curve inside it is savage. Service calls and emergency replacements stack up with the heat, and then the residential phone goes quiet somewhere after the first cool week. A shop that lives on summer call-outs spends January reading last year's bank statements.

The contractor license is the fix, because it changes the shape of the money and not only the size of it.

Planned replacement and install work. A quoted change-out is scheduled, priced and deposited rather than dispatched. You can put those into the shoulder months on purpose.

New construction as a subcontractor. A builder's mechanical package is signed months before it is installed, which means a winter with work already on the calendar. Signing that package is something the contractor license permits and technician registration does not.

Maintenance agreements. Recurring revenue in the months when nothing is breaking, and first call on the equipment when something does.

The subcontract half of that brings the Texas payment machinery with it, and the machinery is on your side. On a private job, Chapter 28 of the Property Code gives an owner 35 days from a written payment request to pay, and overdue amounts run at 1.5% per month. Money you receive that covers a lower tier goes out within 7 days. Those terms are not waivable, so a clause in somebody's subcontract that tries to pay you slower than the statute does not get to.

Ten percent of the contract sits as statutory retainage under Tex. Prop. Code s.53.101, held during the work and for 30 days after completion, and it is yours to claim. Your monthly notice under s.53.056 goes to the owner and the original contractor by the 15th day of the third month after the month you furnished the work on a commercial job, and it is what makes the owner hold money back for you on purpose.

Those dates are month-bucket arithmetic rather than day counting, so they are easy to get wrong in your head and easy to get right on a screen. The Texas lien deadline calculator counts them from the month you worked, and getting paid in 35 days is the private-job clock in full.

The order that gets you there fastest

Register as a technician in your first week. Twenty dollars, one year, renewable, and required of anyone assisting a licensed contractor. Both routes to the contractor license count supervised months, so the sooner you are on somebody's license the sooner they start counting.

Log months by employer with the supervising license number. One line a month beats a memory and a hunt for a former boss.

Certify at 24 months. Then hold the certification for 12. That combination puts the contractor license in reach at 36 months of experience rather than 48.

Choose the endorsement against the customers you want, not the ones you have. The combination endorsement is what lets one truck answer both halves of a restaurant call.

Get the liability quote before you apply. Class A is $300,000 per occurrence, $600,000 aggregate and $300,000 products and completed operations under 16 TAC 75.40. Class B is $100,000, $200,000 and $100,000. Products and completed operations is the line to check on the quote, because that is the cover answering for a unit you installed three summers ago.

Register with the city where your first permit gets pulled. State license first, municipal registration second, permit third, in that order.

No subscription, 2.5% of what you actually collect

Your license renewal date, the 8 CE hours, your insurance certificates, your city registration, your quotes, your invoices and the payment clocks on every job sit in one place. There is no monthly subscription. AEC Stack takes 2.5% of each invoice processed through the platform, collected on the payment due date, which means the platform gets paid when you do.

Pick the class against the biggest job you intend to bid in the next three years, pick the endorsement against the customer you want on retainer, and start the months counting this week. Setting the company up around the license is start your business, and the Texas mechanical packages going out to bid right now are on find work.