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How to Start an HVAC Business in Kentucky: DHBC Master $250 and Journeyman $50 Licenses, $500,000 Liability and $300,000 Property Damage Insurance

How to Start an HVAC Business in Kentucky: DHBC Master $250 and Journeyman $50 Licenses, $500,000 Liability and $300,000 Property Damage Insurance

If you plan to do heating, ventilation and air conditioning work in Kentucky, you need a state HVAC license before you bill your first customer. This guide covers the order I would follow: choosing your license track, documenting experience, passing the exam, buying insurance, filing your business entity, and registering for taxes. The fees and requirements below come from the Kentucky Department of Housing, Buildings and Construction (DHBC) and the Kentucky statutes and regulations that govern HVAC work. Rules and fees can change, so confirm each figure with the agency before you pay anything.

Disclaimer: This article is informational content, not legal or tax advice. For complex situations, such as multiple owners, out-of-state licenses, payroll, or entity structure, talk with a Kentucky-licensed attorney or a certified public accountant (CPA).

Know What Kentucky Licenses and What It Does Not

Kentucky does not have a general statewide business license that every company must hold. Licensing is handled by agency or trade. HVAC is licensed by the Department of Housing, Buildings and Construction through its Division of HVAC, under KRS 198B.650 to 198B.689 and 815 KAR 8:010. Kentucky also has no statewide general contractor license, so your HVAC license is the credential that governs your trade work. Do not confuse it with your business filing. Forming an LLC or registering an assumed name is a filing with the Secretary of State, not a license. You will usually need both, and they follow different rules and deadlines.

Materials and Documents You Need Before You Start

Gather these items before you open an application or schedule an exam. Having them ready prevents the most common delays.

  • Government-issued photo ID
  • Dated work records showing at least 1,500 hours in each 12-month period, signed by your employer or supervising master contractor
  • Documentation of your qualifying track (journeyman or master)
  • Exam fee: $150 for the master exam, $50 for the journeyman exam
  • License fee: $250 for a master license or $50 for a journeyman license, both for a 12-month term
  • A certificate of insurance from a Kentucky-licensed carrier showing general liability of at least $500,000 and property damage of at least $300,000
  • Articles of Organization (Form KLC, Profit Limited Liability Company) if you form an LLC, with a $40 filing fee
  • A Kentucky registered office (a street address, not a post office box) and a registered agent
  • A federal Employer Identification Number (EIN) from the IRS
  • An optional name reservation: $15, held for 120 days
  • Access to the Kentucky One Stop Business Portal and MyTaxes.ky.gov

Step-by-Step: Get Licensed and Set Up Your Business

Step 1: Choose Your License Track

Kentucky requires different experience for each license level. A journeyman license requires two years of work under a master HVAC contractor. A master license requires two years working as a journeyman under a master or equivalent, or licensure as a mechanical engineer. Confirm with DHBC whether your specific background counts as equivalent experience before you rely on it. If you are still learning the trade, apprentices must register with DHBC, so do that early to keep your hours documented.

Step 2: Document Your Experience in Hours

DHBC counts experience in years, and one year means at least 1,500 hours within a 12-month period. For a two-year track, plan on at least 3,000 documented hours. Keep a simple log with dates, job addresses, hours worked, and the supervising contractor's name. Ask your supervisor to sign the log at the end of each month or job, not years later. Reconstructing records from memory is one of the slowest parts of the process.

Step 3: Register as an Apprentice If You Are Not Yet Qualified

Apprentices register with DHBC. Registration matters because it ties your work history to a record the agency can check. Ask DHBC what the registration process involves and whether it carries any cost. This guide does not list an apprentice fee, so confirm that figure with the agency.

Step 4: Pass the Exam

Both the master and journeyman tracks require an exam. You need a minimum score of 70% to pass, and a passing score is valid for three years. Exam fees are $150 for master and $50 for journeyman. Study the code and trade material for the level you are testing for, then schedule through DHBC. Because a passing score is valid for three years, submit your license application within that window or plan to retest.

Step 5: Apply and Pay the License Fee

Once you meet the experience and exam requirements, apply through DHBC and pay the license fee. A master license costs $250 and a journeyman license costs $50, each for a 12-month term. Licenses renew every year by the last day of your birth month. If you miss that date, a 60-day grace period applies, so mark the date on your calendar as soon as you receive your first license.

If you hold an HVAC license in another state, Kentucky may recognize it through reciprocity with states that have substantially equal requirements under KRS 198B.666. Reciprocity is not automatic, so confirm your eligibility with DHBC before you assume it applies.

Step 6: Buy Insurance Before You Advertise or Bid

Kentucky requires HVAC contractors to carry general liability insurance of at least $500,000 and property damage insurance of at least $300,000. The policy must come from a Kentucky-licensed carrier. Under KRS 198B.668, this coverage also satisfies local insurance requirements, so you do not need a separate policy for each city or county where you work. Ask your agent for a certificate of insurance that names your business, lists both coverage amounts, and confirms the carrier is licensed in Kentucky. Premiums vary widely by business and claims history, so get written quotes rather than relying on a general estimate.

Step 7: Form Your Business Entity

Most HVAC owners form an LLC, which is filed with the Kentucky Secretary of State. File online through the Kentucky One Stop Business Portal. The Articles of Organization (Form KLC) carry a $40 filing fee. Several details commonly cause rejections:

  • Your name must include the words limited liability company, limited company, LLC, or LC. To abbreviate limited company, you must use LTD CO.
  • The name must be distinguishable from any name already on record with the Secretary of State (KRS 275.100 and KRS 14A.3-010).
  • You need a Kentucky registered office, which must be a street address, and a registered agent. The agent must be an individual who lives in Kentucky, or a qualified entity, and the agent's business address must match the registered office.
  • Unless the agent signs the formation document, the appointment is not effective until the agent delivers a written acceptance to the Secretary of State.

Processing is usually the same day, but can take up to three business days. Online filings take effect on the date and time you file. The Secretary of State publishes no expedited service tier or expedited fee, so online filing is the fastest route. If you want to hold a name while you prepare the filing, a name reservation costs $15 and lasts 120 days. If you choose a corporation instead, the Articles of Incorporation (Form PAI, Profit Corporation) carry a $50 filing fee.

Step 8: Register for State Taxes

Register your tax account with the Kentucky Department of Revenue using Form 10A100 through MyTaxes.ky.gov. Kentucky's state sales tax rate is 6%, and there are no local sales taxes. The sales tax reaches roughly 50 services, so ask the Department of Revenue whether your HVAC labor, repairs, installations, and parts sales are taxable before you set your invoice template. Register for a sales tax permit if the Department of Revenue confirms you must collect tax.

Your entity's tax obligations depend on how it is structured:

  • LLCs have no franchise tax, but they owe the Limited Liability Entity Tax (LLET), with a $175 minimum if Kentucky gross receipts or gross profits are $3 million or less. LLC income passes through to the members and is taxed at the 3.5% flat individual rate for 2026, with a $3,360 standard deduction.
  • Corporations pay a 5% flat corporate income tax plus the LLET, with the same $175 minimum.

For the LLET thresholds above $3 million, and for how your specific income is taxed, confirm the numbers with the Department of Revenue or a CPA.

Step 9: Check Local Licenses and Occupational Taxes

Kentucky has 120 counties and about 420 cities. Cities, counties, and school districts can levy occupational license taxes on payroll, net profits, or gross receipts. Each jurisdiction runs its own forms and revenue office, so check the city and county where your shop is located and every city where you will work. Do not assume one local filing covers the whole region.

Step 10: File an Assumed Name If You Operate Under a Different Name

If you will operate under a name other than your legal entity name, file a Certificate of Assumed Name (Form ASN). For corporations, LLCs, and other registered entities, the filing is made with the Secretary of State for $20. The registration is effective for five years and can be renewed. County clerk recording fees are set locally, and a copy of the entity filing is also recorded with the clerk of the registered office county. Sole proprietors file with the county clerk of the county where they maintain their principal place of business under KRS 365.015(3).

Step 11: Calendar Your Recurring Deadlines

Your business and your license both renew on a schedule. Put these dates in your calendar on day one:

  • Annual report: $15, due June 30 every year. The filing window opens January 1. Domestic entities that miss June 30 are administratively dissolved.
  • License renewal: Due by the last day of your birth month each year, with a 60-day grace period.
  • Continuing education: Six hours per year to maintain your license.

Exemptions: When You May Not Need a License

Kentucky exempts certain work from the HVAC license requirement under KRS 198B.674. Two exemptions come up most often: an owner working on their own occupied home, and installation or service of residential window units. These exemptions are narrow. If your work involves customers, other properties, or systems beyond a window unit, do not assume you qualify. Confirm with DHBC before you rely on an exemption.

Common Mistakes to Avoid

  • Working before the license is active. Taking a paid job while your license is pending or lapsed puts your business at risk. Confirm the active status on your license before you bid.
  • Letting experience records slip. Hours logged after the fact are hard to verify. Sign your log as you go.
  • Buying insurance below the required limits. A policy at $300,000 general liability does not meet the $500,000 minimum. Check the limits line by line on the certificate.
  • Using a post office box as your registered office. Kentucky requires a street address. Filings with a PO box will not be accepted.
  • Missing the June 30 annual report. A missed deadline can result in administrative dissolution, which is far more expensive to fix than the $15 fee.
  • Assuming one city license covers everywhere you work. Local occupational license taxes differ by jurisdiction, so check each city and county.
  • Charging sales tax without checking. Confirm with the Department of Revenue which of your services and parts are taxable before you add tax to your invoices.

What Results to Expect

Results depend on how complete your experience records are, how quickly you schedule the exam, and how responsive your insurer and local offices are. A prepared applicant who has documented hours, a scheduled exam, and a bound insurance policy may find the path moves forward more smoothly than someone who starts each step from scratch. Agency processing times and exam availability can vary, so plan for delays rather than assuming a fixed timeline. Treat the fees and limits in this guide as a starting point to confirm, not a guarantee of approval or a promise of business volume.

Official Kentucky Resources

Final Checklist and Disclaimer

Before you take your first paid HVAC job, confirm that your license is active, your insurance meets the $500,000 liability and $300,000 property damage minimums, your entity is filed and in good standing, your tax accounts are registered, and your local licenses are in place. Calendar the June 30 annual report and your license renewal date.

This article is informational content, not legal or tax advice. The fees, thresholds, and deadlines reflect the sources available when this guide was researched. Verify every figure with the agency that administers it, and consult a qualified attorney or CPA before making decisions about your license, entity structure, insurance, or taxes.

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