The cost to start an HVAC business is your one-time setup costs (license, tools, vehicle, insurance deposits, starting stock) plus enough cash to cover several months of fixed costs and your own pay while the phone starts ringing. The second part is the one owners underestimate, and it is usually the larger number.
You will find many confident ranges online. Very few say where they came from. Prices for vehicles, tools and insurance vary by state, by your credit and by whether you buy new or used, so the useful answer is a list of lines and a formula you fill in with real quotes.
The formula
Call your one-time costs O. Call your monthly fixed costs F (insurance, truck payment, phone, software, rent if any). Call the minimum you need to pay yourself each month P. Call the gross profit you expect per month while you ramp up G, and the number of months you want covered M.
Cash needed = O + M × (F + P − G)
Be conservative with G. In the first months most new shops book fewer jobs than planned, so many owners set G near zero for the first two or three months.
One-time cost lines
Get a written quote for each one before you add it up.
- Licensing and exams. HVAC contractor licensing is set by your state, and sometimes your city or county. The SBA notes that the licenses and permits you need depend on your activities and location, with fees that vary accordingly. Budget the application, exam, any bond and local business registration.
- EPA Section 608 certification. Under the Clean Air Act, technicians who maintain, service, repair or dispose of equipment that could release refrigerants must be certified (EPA, checked October 2026). Budget the exam for you and anyone you hire.
- Business setup. Entity filing, an accountant to set up your books, and a bank account. The SBA's startup cost guide lists lawyer and accountant fees as a standard startup line.
- Vehicle. Purchase or down payment, upfit (shelving, ladder rack), and lettering.
- Tools and instruments. Gauges or a digital manifold, a recovery machine, a vacuum pump and micron gauge, a leak detector, brazing kit, meters, ladders, hand and power tools.
- Starting stock. Capacitors, contactors, motors, filters, fittings and refrigerant you carry on the truck. See truck stock for how to size it.
- Insurance down payments. The first premium or deposit on general liability, commercial auto and, once you have employees, workers' compensation. Some states set minimums for HVAC licensing; what insurance a contractor needs covers the categories.
- Phone, website and software setup.
Monthly cost lines (the F in the formula)
- Truck payment or lease, fuel, maintenance
- Insurance premiums
- Phone, software, website hosting
- Shop or storage rent, if any
- Marketing spend
- Loan payments on tools
For a quick check on vehicle cost, the IRS sets a business standard mileage rate each year, 76 cents a mile for July to December 2026 (checked October 2026). It is a tax figure, not your actual cost, but if your own per-mile estimate is far below it, look again.
A worked example
In this example the runway is almost as large as the setup. That is the common pattern. Cutting the truck budget saves less than getting to steady booked work a few months sooner.
What moves the number most
New or used truck. It is usually the largest single line. A used van with a solid service record changes O more than anything else on the list.
Service only or installs from day one. Replacement work needs more tools, a second set of hands and the cash to buy equipment before the customer pays. Service and repair work can start lean.
Solo or with a hire. One employee adds wages, payroll taxes and workers' compensation to F before that person has billed a single hour. Run the hire through your break-even labor rate first.
Your state. Licensing, bonding and insurance minimums differ. Texas, for example, requires air conditioning contractors to carry general liability insurance with set minimums for each license class, shown on the TDLR certificate of insurance form (checked October 2026).
Getting G up faster
Gross profit in the ramp months depends on two things: how many jobs you book and how much of each day is spent driving to them. A new shop with customers scattered across a wide area spends a big share of each day on the road. Start with a tight service territory and widen it once the schedule fills. The full sequence, from choosing an area to the first hire, is in how to start a field service business, and the scheduling side of the trade is on the HVAC page.
What to take away
- Total cost = one-time setup plus months of fixed costs and owner pay, minus what you earn while ramping.
- Get a written quote for every line. Published ranges rarely cite a source.
- The runway is often as large as the setup, so plan for slow first months.
- Licensing, EPA 608 and insurance minimums are set by law and vary by state. Check with your state board.
Common questions
Can I start an HVAC business with no money?
Not with none. You need at least a license, insurance, a working vehicle and core tools before your first paid call. Owners who start lean usually work out of a used vehicle, buy tools in stages and keep a day job or side income until the booked work covers F + P.
Do I need a license to start an HVAC business?
In most states, yes, and anyone handling refrigerant needs EPA Section 608 certification. Rules differ by state and sometimes by city, so check your state licensing board before you spend on anything else.
How many months of runway should I plan for?
There is no fixed answer. Run the formula with three, six and nine months and see which one you could survive. If your area has a slow season, make sure the runway covers it.
Is it cheaper to start with service or installs?
Service and repair usually needs less upfront cash because there is no equipment to buy before the customer pays. Installs bring larger tickets but tie up cash and often need a second person.