South Carolina HVAC Contractor Group Limits
How Group Limits Work in South Carolina
South Carolina's Contractor's Licensing Board doesn't issue a single commercial mechanical license and call it a day. Instead, it sorts every licensed commercial HVAC contractor into one of five financial groups — and that group number caps the maximum dollar value of any single project you can bid on or perform.
The system exists to match contracting authority with financial capacity. A one-truck operation with $7,000 in net worth shouldn't be legally authorized to bid a $500,000 hospital HVAC project. The group you qualify for determines what work you can chase.
A commercial mechanical contractor license is required in South Carolina for any commercial HVAC project exceeding $10,000 in total cost. That threshold was raised from $5,000 by a statutory amendment effective May 19, 2023 — older guides and some exam-prep sites still reference the $5,000 figure, which is no longer accurate.
The Five Groups
| Group | Maximum Single-Project Value | Working Capital Required | Net Worth Required | Surety Bond Alternative |
|---|---|---|---|---|
| 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 |
You qualify for a group by meeting either the working capital requirement or the net worth requirement — not both. Working capital is calculated as current assets minus current liabilities. Net worth is total assets minus total liabilities.
If you can't meet either financial threshold, a surety bond equal to the group's net worth requirement substitutes for the financial statement entirely. That 1:1 bond ratio is current law — prior rules required bonds at twice the net worth amount.
Financial Documentation by Group
Groups 1 and 2 allow an owner-prepared financial statement (Doc 172) with a sworn affidavit of accuracy. No CPA involvement needed. This is the simplest path for small operations — you fill out the balance sheet yourself, sign the affidavit, and file it.
Group 3 requires a CPA-compiled balance sheet prepared on a GAAP basis with disclosures. A compiled statement is the least expensive CPA engagement — the accountant organizes your financial data into GAAP-format statements but doesn't verify the underlying numbers.
Group 4 requires a CPA-reviewed balance sheet on a GAAP basis. A review adds analytical procedures and inquiry — the CPA performs some verification work and issues limited assurance on the statements.
Group 5 requires a CPA-audited balance sheet on a GAAP basis for the initial application. At renewal, the requirement drops to a CPA-reviewed statement. A full audit is the most rigorous (and expensive) engagement, with the CPA testing transactions, confirming balances, and issuing an opinion.
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Choosing the Right Group
Most HVAC startups begin at Group 1 or 2. If your typical residential-to-commercial crossover jobs run $15,000 to $30,000, Group 1 covers that range and requires the least financial documentation. If you're bidding light commercial work — restaurant build-outs, small office HVAC systems, retail strip malls — Group 2's $100,000 ceiling gives you room to grow.
Group 3 and above typically serve established firms pursuing institutional, industrial, or multi-building commercial projects. The jump from owner-prepared to CPA-compiled statements at Group 3 adds both cost ($1,500 to $3,000 for a compiled statement) and coordination time (plan 2 to 4 weeks for your CPA to prepare it).
One thing the group system doesn't restrict: the number of concurrent projects. A Group 1 contractor limited to $35,000 per project can run ten $35,000 jobs simultaneously. The cap applies per individual contract, not to aggregate annual revenue.
Upgrading Your Group
As your business grows, you'll want to upgrade. Submit a new financial statement or surety bond meeting the higher group's requirements, and check the CLB's current filing instructions for when to submit the change (commercial renewals are due October 31 of odd-numbered years).
If your financial position changes, check the CLB's current filing instructions before requesting a lower group rather than scrambling to meet the higher threshold.
How This Differs from Residential Licensing
The Residential Builders Commission takes a completely different approach. There are no tiered groups for residential HVAC specialty (RBH) licenses. Instead, the RBC uses a flat financial check: a personal credit report and, for projects exceeding $5,000, a flat $10,000 surety bond. No working capital threshold, no net worth calculation, no CPA involvement.
This means a residential HVAC contractor has no per-project dollar cap imposed by their license — the RBH license authorizes work on any residential structure (three stories or fewer, 16 units or fewer) regardless of project value, as long as the bond is on file for work over $5,000.
If you're deciding between the residential and commercial tracks, the group system is one of the key differences to understand. The South Carolina HVAC License Guide lays out both tracks side by side with the exact filing sequence for each, including how to coordinate your financial documentation with the rest of your application package.
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