Plenty of good HVAC techs start their own company. Fewer last five years, and it's rarely because of their technical skills. It's because they priced jobs like an employee, ran out of cash in a slow month, or spent their evenings on invoices instead of selling the next job.
This guide walks through starting an HVAC business in a practical order: the credentials you need, setting up the business, insurance, budgeting startup costs, pricing, the systems to put in place before you're busy, marketing, and your first hires. It's written for a tech or small partnership going out on their own in residential and light commercial service.
Is now a good time?
Demand for HVAC work is steady and growing. The Bureau of Labor Statistics projects employment of HVAC mechanics and installers to grow 11% from 2025 to 2035, much faster than the average for all occupations, with about 40,600 openings a year (BLS). The refrigerant transition is also driving equipment changes (see our A2L refrigerants guide).
Steady demand doesn't guarantee a profitable company, though. The skills that make you a great tech (diagnosis, workmanship, customer rapport) are necessary but not enough. You'll also be the salesperson, dispatcher, bookkeeper and collections department until you can afford to hire them.
Step 1: Experience and EPA 608 certification
Most state licenses require a set amount of documented experience, often several years, sometimes with a mix of education and field time. Keep records of your work history, supervisors and hours now; you may need them for the application.
EPA Section 608 certification is the one federal credential every HVAC business needs. Anyone who could release refrigerant while servicing or disposing of equipment must be certified (EPA), and only certified techs, or employers that prove they employ one, can buy refrigerant for stationary systems (EPA sales restriction). Get Universal certification if you don't have it. Our EPA 608 guide covers the types, test and records.
Manufacturer training and industry certifications (such as NATE) are optional, but they can help with credibility, warranty programs and dealer relationships.
Step 2: Get licensed
HVAC licensing is not uniform. Depending on where you work, you might need:
- A state HVAC, mechanical or refrigeration contractor license.
- A general contractor or home improvement contractor license.
- A city or county license or registration.
- A separate license for gas piping or electrical work, or a requirement to subcontract that work.
- A trade exam plus a business and law exam.
- A surety bond and proof of insurance to get or renew the license.
Start with your state's contractor licensing board, then call your local building department and ask what you need to pull permits for equipment replacements. The SBA's licenses and permits guide explains the federal, state and local layers. We don't list state-by-state rules here because they change and vary by locality; always confirm with the licensing authority directly.
Permits matter. Equipment replacements usually need a permit and inspection. Doing it right protects you, the customer and the manufacturer warranty, and it's increasingly checked by utilities and rebate programs.
Step 3: Form the business
Choose a structure. Sole proprietorship, LLC, partnership, S corporation or C corporation. Each has different liability protection, taxes and paperwork. The SBA has a plain-language comparison of business structures. Many small trade businesses choose an LLC, but get advice from an accountant or attorney in your state.
Register the business with your state (and register a trade name if you're using one).
Get an EIN. An employer identification number from the IRS is free and you'll need it for hiring, banking and taxes (IRS).
Open a business bank account and keep business and personal money separate from day one.
Set up bookkeeping. Choose accounting software and decide with your accountant whether you'll use cash or accrual accounting. Plan for sales tax rules on parts and equipment in your state, and for estimated tax payments.
Step 4: Get insured
The SBA's business insurance guide covers the main types. For an HVAC business, expect to need:
- General liability: covers property damage and injuries caused by your work.
- Commercial auto: personal auto policies typically don't cover business use of a work vehicle.
- Workers' compensation: required in most states once you have employees; rules vary by state.
- Tools and equipment (inland marine): covers tools and equipment on the truck or job site.
- Surety bond: if your license or your customers require one.
Commercial customers and property managers often require specific coverage limits and to be named as additional insured. Get quotes from an agent who works with contractors, and ask how your rates change as you add trucks and employees.
Step 5: Budget your startup costs
National "average cost to start an HVAC business" numbers aren't worth much, because your costs depend on what you already own, your state's licensing and bonding rules, and your local insurance market. Build your own budget, with real quotes, using these categories (the SBA has a startup cost worksheet):
One-time costs
- Licensing fees, exams and bonds.
- Business formation and legal or accounting setup.
- Vehicle (purchase, lease down payment or upfitting an existing truck), shelving and signage.
- Tools: gauges or digital manifolds, recovery machine, vacuum pump, micron gauge, leak detector, combustion analyzer, meters, brazing kit, ladders, hand and power tools. Make sure recovery and evacuation equipment is rated for A2L refrigerants.
- Initial truck stock: capacitors, contactors, motors, filters, fittings, line set, refrigerant.
- Website, logo and initial marketing.
Monthly costs
- Insurance premiums.
- Vehicle payment, fuel and maintenance.
- Phone and software subscriptions.
- Marketing.
- Your own pay. Budget it now, even if it's small.
Working capital. Plan for three to six months of expenses in the bank. Seasonal slow months, slow-paying customers and supply house terms all eat cash. Running out of cash, not lack of work, is what closes many new trade businesses.
Our home service business plan template gives you a structure for the budget, the first-year forecast and the plan itself, which you'll need if you apply for a loan or line of credit.
Step 6: Set your prices
New owners commonly underprice. They remember what their old employer charged, assume it was too much, and come in lower. Then they discover what it costs to run a truck, carry insurance, pay for software and spend half the day driving and quoting.
Do the math from your costs:
- Your cost per billable hour. What you need to pay yourself (and later your techs), plus payroll taxes and insurance, divided by the hours you'll actually bill, which is far fewer than the hours you work.
- Overhead per billable hour. Truck, insurance, phone, software, marketing, accounting, divided by billable hours.
- Profit. Added as a margin on top.
Then build flat-rate prices for the 20 to 30 jobs you'll do most often. Our guide to pricing HVAC jobs walks through the formulas with a worked example, and the labor rate calculator does the arithmetic.
Decide your service call or diagnostic fee and your policy on crediting it toward repairs before your first call. And plan a simple maintenance plan from day one: members smooth out your revenue and give you a reason to be in the house twice a year (HVAC maintenance plans guide).
Step 7: Set up your systems before you're busy
When the phone starts ringing, you won't have time to build a process. Set up, at minimum:
- Customer and equipment records: name, address, phone, equipment model and serial, install date, service history.
- Scheduling: a calendar that shows your day and the next few days.
- Estimates and invoices: professional, consistent, sent from your phone.
- Payments: take cards on site and send pay-by-text links, so you're not chasing checks.
- Bookkeeping sync: invoices and payments flowing into your accounting software.
For a one-truck shop, simple tools can work. Once you have a second truck or a part-time office helper, it's worth moving to field service software that puts all of this in one place. TradesWork is built for shops from a few techs up, with good-better-best estimates from your price book, Tap to Pay on the phone, memberships that bill automatically and QuickBooks Online sync; our field service software buyer's guide covers how to compare options.
Step 8: Start marketing
You don't need a big budget to get started. You need to be easy to find, easy to reach and easy to recommend.
- Google Business Profile. Set it up completely: service area, hours, services, photos. Most local searches for HVAC service show the map results first.
- Reviews. Ask every happy customer, every time, with a direct link. Steady reviews matter more than a burst.
- A simple website with your services, service area, license number, phone number and a way to book.
- Answer every call. A missed call from a new customer is often a lost job. If you can't answer while you're in an attic, use a service or a missed-call text back.
- Referral partners. Plumbers, electricians, realtors, home inspectors and property managers all meet customers who need HVAC work.
- Truck signage. Your truck is a billboard in every driveway you park in.
- Lead services (Angi, Thumbtack and others) can fill gaps early, but track the cost per job and don't build the business on them.
Track where every job comes from from day one. It's the only way to know which marketing to keep paying for.
Step 9: Make your first hires
Two signals that it's time to hire:
- You're consistently turning down or delaying work.
- Office work (answering calls, scheduling, invoicing, chasing payments) is taking billable hours away from you.
For many owners, the first hire is a part-time office helper or CSR, not a second tech. Every hour they free up is an hour you can bill or sell. The second hire is often an apprentice or helper who can grow into a tech, or an experienced tech if you have enough demand.
Before you hire:
- Set up payroll and register for state payroll taxes and unemployment insurance.
- Get workers' compensation in place.
- Confirm EPA 608 certification for anyone who'll handle refrigerant. Apprentices are exempt only while closely supervised by a certified tech.
- Write down how you want jobs done: the visit checklist, how to present options, how to collect payment. It's what lets someone else do the work your way.
Common mistakes to avoid
- Underpricing to win work. You can't make it up on volume if every job loses money.
- Mixing personal and business money. It makes taxes harder and hides how the business is really doing.
- Skipping permits on replacements.
- No cash cushion for the slow season.
- Doing all the admin yourself for too long.
- Not tracking where jobs come from, what they cost and what they made.
Your startup checklist
- Documented experience for your state license.
- EPA 608 Universal certification.
- State and local licenses, exams and bonds in place.
- Business entity registered, EIN obtained, business bank account open.
- General liability, commercial auto and (with employees) workers' comp in force.
- Startup budget built by category, with three to six months of working capital.
- Labor rate and flat-rate prices for your common jobs calculated from your costs.
- Service call fee and maintenance plan defined.
- Scheduling, estimates, invoicing, payments and bookkeeping set up.
- Google Business Profile, website and review requests running.
- A plan for your first hire.
