S.C. Code Ann. § 38-69-240
(C) With respect to a contract providing for flexible considerations, the minimum nonforfeiture amount at any time at or before the commencement of an annuity payment is equal to an accumulation up to that time at a rate of interest of three percent a year of percentages of the net considerations paid before that time, decreased by the sum of:
(E) With respect to a contract providing for fixed scheduled considerations, minimum nonforfeiture amounts are calculated on the assumption that considerations are paid annually in advance and are defined as for contracts with flexible considerations which are paid annually with two exceptions:
(2) the annual contract charge is the lesser of: