How to Start an HVAC Business in South Carolina — Step-by-Step

The Order of Operations Matters More Than Any Single Step

Most technicians who want to go independent focus on the license exam and figure out the rest later. In South Carolina, that approach creates expensive sequencing errors — filing an entity license application before forming that entity, scheduling your exam before your experience is approved (residential track), or pulling permits before your surety bond is on file. Each of these mistakes costs you non-refundable fees and months of processing time.

Here is the correct order, from zero to first permitted job.

Step 1: Choose Your Track

Before anything else, determine which license you need based on the work you plan to perform:

• Residential only (homes up to 3 stories, 16 units, projects over $500): RBH license from the Residential Builders Commission
• Commercial (commercial, industrial, or institutional buildings, projects over $10,000): Mechanical Contractor license from the Contractor's Licensing Board
• Both: You need both licenses — there is no combined credential

Your track determines the application process, exam requirements, financial documentation, and renewal calendar. Everything downstream flows from this choice.

Step 2: Form Your Business Entity

If you will operate as an LLC or corporation, register it with the South Carolina Secretary of State. The online filing fee is $125. A commercial CLB application for an entity requires proof that it is authorized to conduct business in South Carolina; a sole proprietorship is not required to submit that verification.

After any entity registration, apply for a Federal Employer Identification Number (EIN) through the IRS — free and available immediately online.

Step 3: Get Your EPA 608 Certification

If you do not already hold it, obtain your federal EPA Section 608 certification through an EPA-approved third-party testing organization. Cost ranges from $20 to $150. Choose Universal certification to cover all equipment types. This is a federal requirement for covered refrigerant-handling work, subject to federal exceptions such as closely supervised apprentices — not a state license, but a prerequisite for that work.

Step 4: Prepare and Verify Your Experience

Residential track: Gather your residential experience affidavit (signed by a licensed builder or HVAC contractor) and matching W-2 or 1099 tax records. Submit to the RBC for experience review — they must approve your credentials before you can register for exams.

Commercial track: Document two years of commercial experience within the past five years using LLR Document 167. Describe specific tasks you performed, not general company projects. The CLB does not require pre-approval, so you prepare this documentation in parallel with exam preparation.

Step 5: Pass the PSI Exams

Residential: Residential HVAC Trade exam (80 questions, 65% to pass) and Residential Business and Law exam (50 questions, 68% to pass). Both are open-book.

Commercial: Trade exam for your specific subclassification (70% to pass) and Commercial Business Management and Law exam (50 questions, 70% to pass). All open-book.

Budget $400 to $1,200 for the required reference books. PSI exams only allow the specific editions listed in the candidate bulletin.

Step 6: Secure Your Financial Documentation

Residential: Pull a complete personal credit report (TransUnion, Experian, or Equifax) dated within 30 days of your application. Arrange a $10,000 surety bond if you expect projects over $5,000 — issued in your personal name, not your LLC.

Commercial: Choose your financial group (1 through 5) based on the project sizes you plan to bid on. Either prepare a financial statement (owner-prepared for Groups 1–2, CPA-prepared for Groups 3–5) or arrange a surety bond at the 1:1 ratio. The bond for Group 1 is $7,000; Group 5 unlimited is $300,000.

Step 7: Submit Your License Application

Residential: Submit the $135 application fee with the initial RBC application. After experience approval and the exams, submit the PSI pass sheets, $220 license fee, credit report, and bond documentation.

Commercial: Submit Document 165 (General and Mechanical Contractor Application) with $350, plus Document 168 (PQP Initial Application), PSI pass sheets, and financial documentation to the CLB.

Step 8: Secure Insurance

General liability insurance is not always mandated at the state application level, but local building departments and commercial general contractors universally require it before issuing permits or awarding contracts. Standard coverage starts at $300,000 to $1,000,000 per occurrence. Annual premiums for basic HVAC general liability run $1,200 to $3,500.

Workers' compensation insurance is legally required in South Carolina for any business with four or more employees, including corporate officers and LLC members.

Step 9: Obtain Local Business Licenses and Start Permitting

South Carolina does not issue a statewide business operating license. You need a local business license from each municipality or county where you physically conduct operations. Fees are calculated under the Business License Tax Standardization Act based on gross revenue.

With your state license active and local licenses in hand, you can pull mechanical permits from county and municipal building departments. Each jurisdiction has its own fee schedule and permit process — Greenville County uses an online eTrakit portal, while other jurisdictions require in-person submissions.

For the full launch sequence with detailed documentation checklists and a timeline for each step, the South Carolina HVAC License Guide walks through the entire process from entity formation to first permitted job.

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