How to Start an HVAC Business: Licenses, Costs, Customers

Here is how to start an HVAC business: hold an EPA Section 608 certification, meet your state's contractor license rules, and then register, insure, and bond the company. After that, equip one truck for the work you know best, set prices that cover a full working day, and win your first jobs from past customers, local referrals, and a Google profile.

These steps are written for a U.S. technician going out on their own, solo or with one helper. Licensing rules change from state to state and city to city, so confirm each one with your own board.

Why the order matters when you start an HVAC business

HVAC is a strong trade to own. The Bureau of Labor Statistics projects employment of HVAC mechanics and installers to grow 11 percent from 2025 to 2035, much faster than average, with about 40,600 openings a year.

The same BLS profile shows how few techs take the leap. Plumbing, heating, and air conditioning contractors employ 68 percent of HVAC techs, and only 6 percent are self-employed. The median wage was $61,010 in May 2025, and that figure doesn't include self-employed workers. Your business has to pay you more than a steady job would, after insurance, the truck, and slow weeks.

The order matters because the license comes first. In California, for example, contractors must be licensed before they submit bids. Buying a truck and printing door hangers before you qualify can leave you with payments and no legal way to take the jobs. Work through the steps below in order, and keep your current job until the first two are done.

Five steps to start an HVAC business: certify and license, register and insure, equip one truck, price the work, and win first customers

The order to work through, from your refrigerant card to your first booked calls. Diagram only.

Step 1: Get EPA 608 certified and check your state license

Two credentials decide what work you can legally take. The first is federal and covers refrigerant. The second comes from your state, and sometimes your city.

Get your EPA Section 608 certification

Under Section 608 of the Clean Air Act, technicians who maintain, service, repair, or dispose of equipment that could release refrigerants must be certified. The EPA counts attaching gauges to measure pressure, and adding or removing refrigerant, as technician work.

The EPA offers four types:

Type I, for servicing small appliances
Type II, for servicing or disposing of high- or very high-pressure appliances, except small appliances and motor vehicle air conditioners
Type III, for servicing or disposing of low-pressure appliances
Universal, for servicing all types of equipment

Tests must be given by an EPA-approved certifying organization, and the credentials don't expire. If you want Universal, take the Core exam proctored, because an open-book Core test can't be used for it. The EPA doesn't issue cards itself, so keep the card your certifying organization sends you and a photo of it on your phone.

Apprentices are exempt only while a certified technician closely and continually supervises them. That matters later, when you hire your first helper.

EPA Section 608 certification types: a Core exam plus Type I small appliances, Type II high pressure, Type III low pressure, and Universal for all types

The four EPA certification types and the rules that come with them. Based on the EPA's own requirements page.

Check your state's contractor license

State rules vary more than anything else in this guide. Some states license HVAC contractors directly, some fold the work into a mechanical or general contractor license, and some leave it to cities. Texas and California show how different the paths can be:

Requirement	Texas (TDLR)	California (CSLB)
License	Air Conditioning and Refrigeration Contractor, Class A or Class B, with Environmental Air or Commercial Refrigeration endorsements	C-20 Warm-Air Heating, Ventilating and Air-Conditioning contractor
Experience	48 months under a licensed ACR contractor in the past 72 months, or 36 months in the past 48 plus 12 months as a certified technician	Four full years in the last 10 years at journey level, or as a foreman, supervisor, or contractor
Exam	Class and endorsement exam, retakes allowed until the application expires after one year	Trade exam for the classification
Money up front	$115 application fee	$25,000 bond in place before the license is issued
Insurance	Class B: $100,000 per occurrence and $200,000 aggregate. Class A: $300,000 per occurrence and $600,000 aggregate	Ask your insurance agent what your work needs
When you need it	Before you contract for air conditioning and refrigeration work	When a job needs a permit, uses other workers, or totals $1,000 or more

In Texas, the contractor license page says you must be at least 18, have your supervisor fill out the experience verification form, and finish every step within one year of applying. After you pass the exam, you send a certificate of insurance, and you keep general liability coverage in force while the license is active. Licenses are valid for one year from the date of issue.

In California, the CSLB explains who must be licensed and what happens if you skip it. A first offense of contracting without a license is usually a misdemeanor, with a possible six months in jail and a $500 fine, plus an administrative fine of $200 to $15,000. You also can't split a big job into small contracts to stay under $1,000.

Find your own state and city rules

If you work outside these two states, search for your state's contractor licensing board, and use only the official site. Then call your city or county building department and ask these questions:

Do I need a state license, a local license, or both to install and repair HVAC equipment here?
Which jobs need a mechanical permit, such as a furnace or condenser changeout?
Do gas piping or electrical work need a separate license, or must I hire it out?
Does each town I plan to cover have its own registration?

Write down each answer with the date and the name of the person you spoke with.

Step 2: Register, insure, and set up the money

Once you know you can qualify, set up the company so the license, insurance, and bank account all carry the same legal name.

Choose a structure and register it

The SBA explains that a sole proprietor can be held personally liable for the business's debts and obligations. An LLC protects personal assets like your vehicle, house, and savings in most instances. The SBA also says registering usually costs less than $300, though fees vary by state and structure.

Talk to an accountant before you file, because the structure changes how you're taxed. In California, the CSLB issues licenses to individuals, partnerships, corporations, LLCs, and joint ventures, and the license belongs to that entity. So decide the structure before you apply for the license, not after.

Get a free EIN and open a business account

Apply for an EIN directly from the IRS. It's free, and the IRS warns that you should never pay a fee for one.

Open a business checking account the same week. Run every parts order, fuel stop, and customer payment through it. Move a share of each payment into a separate savings account for taxes, since nobody withholds tax from an owner's pay.

Insure and bond the business

Insurance is often part of the license itself, as the Texas minimums show. Even where it isn't, a single water leak from a condensate line or a scratched floor can cost more than the job paid. Ask a commercial insurance agent these questions before your first paid call:

Does general liability cover damage to the customer's home while I work, and damage that shows up after I leave?
What limits does my state license require, and can you name the board on my certificate of insurance?
Is my truck covered for business use, and are the tools and recovery equipment inside it covered against theft?
When I hire my first helper, when do I need workers' compensation?

If your state requires a bond, buy it through the same agent or a surety company. Keep a copy of your certificate of insurance on your phone.

Step 3: Equip one truck and pick your first services

Buy for the jobs you'll take in the next six months, not the business you want in five years.

Pick the work you know best

Most new owners start with the work they did for their last employer. Pick two or three of these and say no to the rest for now:

Service and repair calls, like no-cool, no-heat, and noisy systems
Seasonal maintenance visits before summer and winter
Equipment replacements, such as a condenser, furnace, or heat pump changeout
Light commercial rooftop units, if your license and experience cover them

The BLS notes that residential HVAC techs may sell service contracts for periodic maintenance, which usually include inspecting the system, replacing filters, and checking refrigerant levels. A small list of maintenance customers gives you steady work during the slow weeks between seasons.

Build the core kit

Most of the starter kit fits in one truck or van:

Digital manifold or gauge set, with hoses for the refrigerants you'll handle
Vacuum pump and micron gauge
Recovery machine and recovery cylinders
Leak detector and nitrogen setup for pressure testing
Brazing kit, tubing cutter, flaring and swaging tools
Multimeter with clamp, and a combustion analyzer for gas furnaces
Ladders, a shop vac, drop cloths, and shoe covers
A small stock of common parts, like capacitors, contactors, fuses, and filters

Open accounts at one or two local supply houses. Ask about early will-call hours, since a part you can grab before your first call saves a second trip.

HVAC startup costs grouped into one-time costs, monthly fixed costs, and a cash reserve for slow weeks, late payers, and repairs

Where startup money goes. Put a real quote next to each line, since prices vary by state and market.

Step 4: Price the work so each job covers the day

Your prices have to cover your time on site, the drive, parts, insurance, the truck, and the calls that never turn into work. Start with a day target, then pick a pricing method.

Work out your day target

Add up your monthly fixed costs, like insurance, the truck payment, your phone, and software. Divide by the days you plan to work. Then add the pay you want for each day, and remember that the BLS median for employed techs is your floor. That total is your day target.

Check each job against it. If a repair takes half a day with drive time, it should bring in at least half your day target.

Choose flat rate or time and materials

Pricing method	Best for	Trade-off
Flat rate by task	Common repairs and maintenance, quick yes or no from the homeowner	Takes time to build the price book, and a slow job eats your margin
Time and materials	Hard-to-diagnose problems, older systems, commercial work	Customers worry about the total, so give a written range
Fixed bid per project	Equipment replacements and new installs	You carry the risk if the job grows, so walk the site first

Many owners mix the three. They charge a service call fee for diagnosis, flat rates for common repairs, and a fixed bid for replacements.

Set a service call fee and an after-hours rate

A service call fee pays for the drive and the diagnosis, even when the customer decides not to repair. Tell the customer the fee on the phone, before you book the visit. Set a higher rate for nights, weekends, and holidays, and decide in advance how often you'll take those calls.

Step 5: Win your first HVAC customers

Start with people who already trust your work

Past customers, neighbors, friends, and family are the fastest first jobs. Builders, property managers, and real estate agents also need dependable HVAC help on short notice. If you signed a noncompete or nonsolicitation agreement with your old employer, read it before you contact anyone from their customer list, and ask a lawyer if it's unclear.

Set up a Google Business Profile as a service-area business

You go to the customer, so set up the profile as a service-area business with the towns you actually cover. If you run the business from home, the steps to hide your address on Google Business Profile keep your house off the map. Add each service you offer and real photos from your own jobs.

Ask for a review after every job

Ask while the customer can feel the system working again. The steps to get Google reviews from happy customers take a few minutes once your review link is saved on your phone.

Add marketing and software in the right order

Once referrals and reviews are working, these HVAC marketing ideas show what to try next. When the phone gets busy enough that you lose track of jobs, compare HVAC software before you pay for more than you need.

Common problems and how to fix them

You don't have enough supervised experience for the license

Keep working for a licensed contractor until you qualify, and ask your supervisor to sign your experience form as you go. In Texas, a technician certification held for 12 months shortens the experience requirement. In California, the four years must be at journey level, or as a foreman, supervisor, or contractor.

A customer asks for work outside your license

Don't take it. A gas line extension, a new circuit, or a full duct redesign may need another license or a permit you can't pull. Keep a short list of licensed plumbers and electricians you trust, and offer to coordinate with them.

Summer and winter calls bury you, then the phone goes quiet

The BLS notes that HVAC techs often work overtime or irregular schedules in peak heating and cooling seasons. Sell maintenance visits in spring and fall to fill the quiet weeks, and set aside cash during the busy months to cover the slow ones.

Cash is tied up in parts and late payers

Collect payment when the job is done, before you leave the driveway. For replacements, agree on the payment terms in writing before you order equipment. Keep your parts stock to what you use every week, and order the rest per job.

Where a bookable site fits

Once reviews and referrals start, many homeowners will look you up before they call. A Kejoola site, for example, is four pages (Home, Services, Blog, Contact) with online booking. A homeowner picks a time and types the address, the system type, and the problem in the notes box, and the booking lands in your bookings. The post on what an HVAC website should include covers the pages and wording that help.

Questions owners ask about starting an HVAC business

How much does it cost to start an HVAC business?

It depends mostly on your state and on the truck and tools you already own. The SBA says registering a business usually costs less than $300, and the IRS issues EINs for free. State costs vary. Texas charges a $115 contractor application fee, and California requires a $25,000 bond. Get real quotes for the truck, tools, and insurance before you commit.

Do you need a license to start an HVAC business?

Usually yes, though the type depends on where you work. Anyone who services or repairs equipment that could release refrigerant needs EPA Section 608 certification. Many states also require a contractor license, like the Texas ACR license or the California C-20. Check your state board and your city building department.

Does EPA 608 certification expire?

No. The EPA says Section 608 credentials don't expire. You need the type that matches the equipment you service, or Universal for all types. If you lose your card, contact the certifying organization that tested you, because the EPA doesn't issue cards itself.

Can you start an HVAC business without your own contractor license?

In some states, yes, if a licensed person qualifies the business for you. In California, every license needs a qualifying individual, which can be the owner or a responsible managing employee. That employee can qualify only one active license and must work at least 32 hours a week, or 80 percent of business hours, whichever is less.

Is an HVAC business a good business to start?

Demand is strong. The BLS projects 11 percent job growth from 2025 to 2035, much faster than average. The work is also hard on your body and seasonal. A business makes sense once you have the license, a few customers who trust you, and prices that pay more than a steady job would.

Get a website where customers book your HVAC calls

If you want a site where customers can see your services and book a time, you can get a website with online booking from Kejoola. Already have a Google Business listing? Paste your listing link and get a website with online booking, so customers book themselves.

14-day free trial, no card needed. Online booking starts on the Starter plan.

How to Start an HVAC Business: Licenses, Costs, and First Customers