How to start an HVAC business in 2026: licensing, an HVAC business plan and steady work
HVAC work follows the weather: quiet weeks, then a heat wave and a phone that won't stop. Here is how to set the business up, what an HVAC business plan needs, and how to smooth out the seasons.
An HVAC business has a shape most trades don't: long quiet stretches, then a heat wave or a cold snap that brings a month of calls in a week. Starting one well means getting licensed and insured, pricing for the slow months as well as the busy ones, and building recurring work so the phone rings in April too.
1. Licenses and certifications
- EPA Section 608 certification is a federal requirement for anyone who maintains, services, repairs or disposes of equipment containing refrigerant, and you'll need it to buy most refrigerants.
- State or local HVAC (mechanical) contractor license: many states and cities license HVAC contractors, often with an exam, proof of experience, insurance and sometimes a bond. Check before you take your first paid job.
- Optional credentials such as NATE certification help with hiring and some customers, but aren't legally required.
2. Set up the business
- Structure: many owner-operators start as an LLC; ask an accountant whether an S-corp election makes sense as profit grows.
- Register with your state, get a federal EIN, and open a business bank account before the first invoice.
- Insurance: general liability, commercial auto for the van, workers' compensation once you hire (required in most states), and tools and equipment cover.
- Supplier accounts: open accounts with one or two local distributors early; terms and pricing improve as you buy more.
3. Write an HVAC business plan
An HVAC business plan should be short and practical. The part most new owners skip is the seasonal cash flow: you'll earn most of your money in a few peak months and still pay for the van, insurance and phone in the quiet ones.
| Section | What to write down |
|---|---|
| Services | Repair, replacement, maintenance, new construction, commercial, indoor air quality. Pick what you'll lead with. |
| Service area | The towns and zip codes you'll cover, and your emergency radius. |
| Pricing | Flat-rate repair pricing, diagnostic or trip fee, after-hours rate, and maintenance plan price. |
| Recurring revenue | How many maintenance agreements you want by the end of year one. |
| Seasonality | Expected busy and slow months, and the cash buffer to get through the slow ones. |
| Marketing | Google Business Profile, reviews, Local Services Ads, tune-up campaigns, referrals. |
| Numbers | Monthly costs, jobs needed to break even, and your target average ticket. |
4. Build recurring work with maintenance agreements
Maintenance agreements (a yearly or twice-yearly tune-up for a set price) are how HVAC shops fill the shoulder seasons. They bring booked work into spring and fall, keep you in front of the customer when a system needs replacing, and give you a list of people to call before the first heat wave.
5. Price for the whole year
Set a diagnostic or trip fee, flat-rate prices for common repairs, and a clear after-hours rate, and make sure whoever answers the phone quotes them the same way. SearchLight's February 2026 benchmark of 409 HVAC accounts on Google Local Services Ads found a $2,110 average job and about $487 of paid work for each ad lead, so each emergency call is worth planning for.
6. Get ready for the surge
The first hot week of summer is when a new HVAC business is made or broken. Calls arrive faster than any one-truck shop can answer, and a homeowner with no cooling calls the next company when nobody picks up. Invoca's 2026 data puts the share of calls to home-services businesses that never reach a person at about 48%.
- Decide in advance which calls you'll take tonight and which can wait for morning.
- Set up an on-call rotation and a way to get urgent calls to whoever is on it.
- Have something answer the phone when you can't. Wakeman is an HVAC answering service that takes several calls at once, tells a dead furnace from a maintenance question, and rings your on-call phone for a burning smell or carbon monoxide, from $149 a month.
- Before you pay for anything, work out what your missed calls cost.
7. How to grow an HVAC business
- Grow the maintenance agreement list every season.
- Ask every customer for a review, and answer every review.
- Track where each job came from and spend more on what works (marketing ideas that work for HVAC).
- Hire your second tech before peak season, not during it.
Common questions
What license do I need to start an HVAC business?
You'll need EPA Section 608 certification to work on equipment with refrigerant, and many states and cities also require an HVAC or mechanical contractor license. Check your state licensing board and local rules.
What should an HVAC business plan include?
Your services, service area, pricing (including diagnostic fee and after-hours rate), maintenance agreement goals, a seasonal cash-flow plan, your marketing plan and the monthly numbers you need to break even.
How do HVAC businesses get through the slow season?
Mostly with maintenance agreements, which bring booked tune-ups into spring and fall, plus a cash buffer from peak months and marketing to past customers before the season turns.