S.C. Code Ann. § 38-90-40
(A) The director may not issue a license to a captive insurance company unless the company possesses and thereafter maintains unimpaired paid-in capital of:
(5) in the case of a special purpose captive insurance company, an amount determined by the director after giving due consideration to the company's business plan, feasibility study, and pro-formas, including the nature of the risks to be insured.
The capital may be in the form of cash, cash equivalent, or an irrevocable letter of credit issued by a bank chartered by this State or a member bank of the Federal Reserve System and approved by the director.