How to Get an HVAC License in South Carolina (2026 Guide)

South Carolina licenses HVAC work through two separate agencies, at two very different dollar thresholds, under four different mechanical subclassifications whose scope boundaries decide what equipment you are legally allowed to touch. Almost none of that comes across in the guides currently ranking for this topic, several of which are running on law that changed three years ago.

Here is how South Carolina actually regulates heating, air conditioning, and refrigeration in 2026, the residential license, the commercial classifications, the tonnage and BTU limits that separate them, the fees, and the qualifying-party rule that determines whether an HVAC business can hold a commercial license at all.

Start with the thresholds, because the published ones are wrong

The two numbers you will see repeated across page-one results are $200 for residential and $5,000 for commercial. Neither is current.

• Residential HVAC work exceeding $500 requires a license. That is what the Residential Builders Commission states on its own Residential HVAC Installer and Repairer page.
• Commercial mechanical work exceeding $10,000 requires a license. S.C. Code section 40-11-30 sets it, and 2023 Act No. 69 raised it from $5,000 to $10,000 effective May 19, 2023.

If you are sizing jobs against a $5,000 commercial threshold, you are turning away work you are legally allowed to do, or worse, budgeting compliance against the wrong line.

The two agencies

Both sit inside the South Carolina Department of Labor, Licensing and Regulation (LLR), and they issue different credentials that do not substitute for each other.

Residential Builders Commission (RBC) licenses the individual. The credential is the Residential HVAC Installer and Repairer License (RBH).

Contractor's Licensing Board (CLB) licenses the business entity. The credential is a Mechanical Contractor license carrying one or more of the HVAC-relevant subclassifications: Air Conditioning, Heating, Packaged Equipment, or Refrigeration.

A naming correction while we are here. Several guides refer to a "Residential Specialty HVAC Contractor" license. That credential does not exist. South Carolina has a Residential Specialty Contractor Registration, but its trades are siding, insulation, roofing, floor covering, masonry, drywall, carpentry, stucco, painting and wallpapering, and solar panel installation, and it requires no exam. HVAC is a separate licensed trade with a mandatory exam. The two are not the same thing, and treating them as one is how people conclude, wrongly, that residential HVAC in South Carolina is exam-free.

Path one: Residential HVAC Installer and Repairer (RBH)

Experience

One year of residential HVAC experience within the past five years, verified by employer or supervisor affidavit, with W-2s or 1099s supporting the employment history. Work experience must be verified and approved before you are made eligible to sit for the exam, you cannot test first and document afterward.

Exams

PSI administers the exams. You must pass both the Residential HVAC technical portion and Business Management and Law.

Exam waiver

The technical portion can be waived, experience and the Business Management and Law exam still apply, if you:

• Are a currently licensed SC Mechanical Contractor with the Air Conditioning (AC) or Packaged Equipment (PK) classification, in good standing, active a year or longer, obtained by examination; or
• Hold a current license, obtained by examination and held a year or longer, in an eligible state: Alabama, Mississippi, or North Carolina. Grandfathered licensees do not qualify; or
• Hold a current HARV (Master Mechanical) Certification issued by examination.

Small detail worth flagging because it trips people who hold both trades: the HVAC waiver list has three eligible states, while the residential plumber waiver list has only two, Mississippi and North Carolina. Alabama counts for HVAC and not for plumbing. Nobody publishes that asymmetry.

Fees

| Residential HVAC Installer and Repairer (RBH) | Amount | |---|---| | Application fee | $135 | | License fee | $220 | | Renewal fee | $220 | | Renewal late fee | $50 | | Reinstatement fee | $480 |

Fees are set by the Residential Builders Commission and are subject to change, verify with LLR before applying. PSI exam fees are separate and paid directly to PSI.

Lapse rules

A license lapsed less than three years can be reinstated. Lapsed more than three years, and you apply as a new applicant, which means retesting. That three-year cliff is the single most expensive detail on the residential side, and it is missing from most guides.

The conditional bond and the credit report

As on the plumbing side, the Residential Builders Commission requires a credit report dated no more than 30 days before the application, reviewed for liens and outstanding judgments, and a $10,000 surety bond in the individual's own name, not a company name, on file before performing work exceeding $5,000 total cost of construction on a project. Handwritten and DocuSign-signed bonds are not accepted. Guides that describe a flat, unconditional "$10,000 bond requirement" are overstating it; the trigger is the project size.

Path two: Mechanical Contractor, and the subclassification scopes that actually matter

This is where South Carolina gets genuinely technical, and where a guide is either useful or it is filler. The subclassification you hold determines what equipment you may legally install. These definitions come from section 40-11-410(5).

Air Conditioning (AC), installation, replacement, alteration and repair of air conditioning equipment and systems producing conditioned air for environmental heating or cooling within buildings. Hot water or steam heating systems or components are not included. This subclassification also includes the work of Packaged Equipment and Refrigeration, meaning AC is the broadest of the comfort-cooling classifications.

Heating (HT), heating equipment and systems requiring high or low pressure steam vapor or hot water, including all piping, ducts, and mechanical equipment, including boilers, plus the gas lines necessary if the equipment is gas-fired. This is the classification that reaches hydronic and steam work that AC expressly does not.

Packaged Equipment (PK), and here is the limit almost nobody publishes: limited to twenty-five tons cooling and 500,000 BTU/hr heating per unit. Within that cap it covers packaged and split-type direct expansion equipment including heat pumps, gas-fired furnaces and space heaters, ventilation systems and ductwork, air filtering, kitchen exhaust and hood systems, pneumatic or electrical controls, thermal and acoustical insulation, vibration isolation, liquid fuel piping and tanks, and water and gas piping from service. It does not include hot water or steam heating systems or components.

Refrigeration (RF), refrigeration equipment and systems for processing, storage and display of food products and other perishables, and for commercial, industrial and manufacturing processes requiring refrigeration, excluding comfort air conditioning. Includes walk-in box construction and installation, temperature/safety/capacity controls, and testing and balancing.

Two practical consequences. First, a contractor holding only PK cannot lawfully take a 40-ton rooftop unit; that is AC work. Second, a contractor holding only AC cannot lawfully take a steam or hot-water boiler job; that is Heating.

The electrical crossover nobody documents

Buried in the Electrical (EL) subclassification definition is a small HVAC allowance: an electrical contractor may install window or through-the-wall air conditioning units not to exceed three horsepower or three tons, where no piping is necessary. Above that, or where refrigerant piping is involved, it is mechanical work requiring a mechanical classification. If you have ever wondered why an electrical contractor could legally set a PTAC, that is the provision.

What the entity must submit

Under section 40-11-240 the entity must be a properly registered business form and must have a certified qualifying party in a responsible management position. Then:

• Doc 165 application
• $350 license fee
• Secretary of State verification (not required for sole proprietorships), Articles of Incorporation or Organization, and ownership documentation
• Financial statement or surety bond establishing the license group
• Doc 168 (initial) or Doc 181 (transfer) for each qualifying party
• PSI pass sheets for the technical exam and the S.C. Business Management and Law for Commercial Contractors exam

The $350 fee is set by the board and subject to change; verify with LLR.

Mechanical contractor license groups

| Group | Bid/job limit | Working capital | Net worth | Surety bond | |---|---|---|---|---| | 1 | $35,000 | $3,500 | $7,000 | $7,000 | | 2 | $100,000 | $10,000 | $15,000 | $15,000 | | 3 | $200,000 | $20,000 | $30,000 | $30,000 | | 4 | $400,000 | $40,000 | $60,000 | $60,000 | | 5 | Unlimited | $200,000 | $300,000 | $300,000 |

Meet either net worth or working capital. Under section 40-11-262, a surety bond used in place of a financial statement is now equal to the required net worth, 2023 Act No. 69 changed it from two times the net worth. Guides still doubling those bond figures are out of date.

Note the mechanical Group 1 ceiling is $35,000, the lowest first-rung ceiling in the schedule. An HVAC business doing $60,000 changeout packages needs Group 2 at minimum.

Renewal, and the date everyone gets wrong

Mechanical Contractor licenses expire October 31 in odd-numbered years. (General Contractor licenses expire October 31 in even-numbered years.) Renewal is biennial. A lapsed license may be renewed within 90 days of expiration with late fees, retroactive to the expiration date; past 90 days you apply as a new applicant.

Guides reporting a June 30 expiration for commercial licenses are simply incorrect.

Two HVAC-only rules in South Carolina statute

These apply specifically to mechanical contractors licensed in Air Conditioning, Heating, or Packaged Equipment, and they appear in no competing guide we found.

Display the license. Section 40-11-270(B) requires each person holding a mechanical contractor license in those subclassifications to display the license conspicuously at the principal place of business.

Mark the trucks, and the paperwork. Section 40-11-270(C) requires that all commercial vehicles used exclusively in daily operations by mechanical contractors licensed in AC, Heating, or Packaged Equipment prominently display the mechanical contractor license number, and that each invoice and proposal form also contain the license number.

That is a real, enforceable, HVAC-specific obligation attached to every van in the fleet and every quote that leaves the office.

Federal layer: EPA Section 608

Separate from anything South Carolina issues, federal law requires technicians who maintain, service, repair, or dispose of equipment that could release refrigerants to hold EPA Section 608 certification under 40 CFR Part 82, Subpart F. It is not a South Carolina license, LLR does not issue it, and holding it does not satisfy any state requirement, but you need it, and the state license does not substitute for it. We cover the distinction in detail in EPA 608 certification versus an HVAC license.

The 2026 change: trade certification moved from MASC to Carolinas AGC

This is the live regulatory change in South Carolina HVAC licensing right now, and it is barely reported.

The Municipal Association of South Carolina (MASC) long administered the SC Mechanical Trades Certification Program, including the HARV (Master Mechanical) Certification. As of January 1, 2026, Carolinas AGC (CAGC) is the SC Mechanical Trades Certification Program provider.

LLR now accepts a HARV (Master Mechanical) Certification issued by examination between September 7, 2013 and December 2025 by MASC, or issued after January 1, 2026 by CAGC, and it maps to the Air Conditioning and Heating licensure classifications. Certification holders needing a verification letter now contact CAGC, not MASC.

If you are working from a guide that routes you to MASC for that letter, it is pointing you at an organization that no longer runs the program.

Certification program administration is set by the board and its designated provider and can change; confirm current arrangements with LLR and CAGC.

Local requirements still apply

The Contractor's Licensing Board states directly that cities and counties may impose additional licensing and permitting, each with its own rules and fees. A state mechanical contractor license does not exempt you from a municipal business license or local permitting. Determine whether your job sites fall inside city limits or in unincorporated county, then contact the relevant Business License or Building Permit department. This state-versus-local split is a recurring source of confusion nationally, see state versus local contractor licensing.

Penalties for unlicensed HVAC work

Administrative: section 40-11-100 allows citations and penalties against anyone, including unlicensed contractors, up to $500 for a first violation of a provision, up to $1,000 for a second of the same or substantially similar provision within five years, capped at $2,500 per day against any one entity or individual.

Criminal: section 40-11-200 makes practicing in violation of the chapter, or knowingly submitting false information to obtain a license, a misdemeanor carrying up to one year imprisonment or a fine of up to $5,000.

Board civil penalty: section 40-11-110(C) permits up to $5,000 per violation.

Payment bar: section 40-11-370(C) provides that an unlicensed entity "may not bring an action either at law or in equity to enforce the provisions of a contract", and the same bar applies to an entity that contracted under a name other than the exact name on its license. Do the work unlicensed and the customer's obligation to pay you becomes unenforceable in South Carolina courts.

There is also a disciplinary provision that speaks directly to arrangements where a license is lent rather than genuinely used. Section 40-11-110(A)(9) makes it grounds for discipline to be "aiding or abetting an unlicensed entity to evade the provisions of this chapter, combining or conspiring with an unlicensed entity, allowing one's license to be used by an unlicensed entity, or acting as agent, partner, or associate, or an unlicensed entity." We look at why that language matters in is it legal to rent a contractor license.

The credential the business actually needs

An HVAC business in South Carolina does not get a commercial mechanical license by being competent. It gets one by having a certified qualifying party in a responsible management position, section 40-11-240(A)(2) states it as a flat condition of licensure.

Under section 40-11-230(B), that Primary Qualifying Party must hold a valid certificate, prove full-time employment for at least two years within the previous five in the classification, and document that they are in a management capacity, actively involved in management, supervision, and operations. The statute requires that the PQP be "an integral party of the applicant's business" and bars the PQP from taking "other employment that would conflict with the duties as primary qualifying party or diminish the ability to adequately supervise work performed by the licensee."

When that person leaves: 15 days to notify LLR in writing, 90 days of continued good standing, then suspension if no replacement is designated. Full mechanics in South Carolina's primary qualifying party rules.

Frequently asked questions

How much does an HVAC license cost in South Carolina?

The state-side numbers are fixed and public. Residential: $135 application plus $220 license fee, plus PSI exam fees, plus a credit report, plus a $10,000 bond premium if you take projects over $5,000. Commercial: $350 license fee, PSI fees for the technical and business-and-law exams, Secretary of State filings, and either a CPA-prepared financial statement or a surety bond premium sized to your license group. The part no article can price is what it costs to get a compliant HVAC business operating, that depends on which subclassifications you need, which license group, how many states, and whether you already have a certified individual in management. For a number that fits your situation, book a consultation.

Does South Carolina require an HVAC license for residential work?

Yes, above $500. Residential HVAC exceeding $500 requires the Residential HVAC Installer and Repairer license from the Residential Builders Commission. That is a low bar, a single condenser changeout clears it.

What is the difference between Air Conditioning and Packaged Equipment?

Packaged Equipment is capped at 25 tons cooling and 500,000 BTU/hr heating per unit; Air Conditioning has no such cap and additionally includes the work of Packaged Equipment and Refrigeration. Neither covers hot water or steam heating, that is the Heating classification. If your work spans light commercial rooftops and hydronic systems, you likely need more than one subclassification.

Do I need both a residential and a commercial license?

Only if you do both kinds of work above both thresholds. They are separate credentials from separate agencies, and neither substitutes for the other. Holding a Mechanical Contractor license with the AC or PK classification does, however, waive the technical portion of the residential exam.

Can my HVAC company hold a commercial license if I am not the certified individual?

Yes, the commercial license belongs to the entity, and the certified individual serves as its Primary Qualifying Party. But South Carolina requires that person to be genuinely employed full-time, genuinely in management, and genuinely supervising the work, and it prohibits outside employment that would compromise those duties. If you need a qualified individual placed inside your business as a full-time W-2 employee, that is what we do, see hire a qualifying agent.

Bottom line

South Carolina's entry requirements are light, one year of experience for residential, two for commercial, and its structural requirements are not. Four mechanical subclassifications with hard scope boundaries, a 25-ton and 500,000 BTU cap on Packaged Equipment, license-number display rules on every service vehicle and every proposal, a certification program that changed providers on January 1, 2026, and a commercial license that cannot exist without a qualified individual sitting in management inside the company.

If you are a technician, the residential license is a short, cheap, sensible first step. If you are a business chasing commercial mechanical work, the qualifying party is the whole game.

Next: what a qualifying agent is, the national HVAC contractor license overview, the South Carolina contractor licensing guide, and all state guides.

Thresholds, fees, subclassification scopes, and statutory provisions were verified against S.C. Code Title 40, Chapter 11, the South Carolina Contractor's Licensing Board, and the South Carolina Residential Builders Commission as of August 2026. Government and testing-vendor fees are set by the board and the vendor and are subject to change, verify current amounts with LLR and PSI before applying. This guide describes the licensing process and is not legal advice.