S.C. Code Ann. § 37-2-309
(C)
(2) A material term of the credit sale includes:
(d) any insurance premiums, prepaid finance charges, third-party fees, or preparation charges that vary from the previously disclosed insurance premiums, prepaid finance charges, third-party fees, or preparation charges by the lesser of five hundred dollars in the aggregate or one percent of the estimated amount disclosed pursuant to subsection (A) above.
PART 4. LIMITATIONS ON AGREEMENTS AND PRACTICES