S.C. Code Ann. § 12-51-90
(B) The lump sum amount of interest due on the whole amount of the delinquent tax sale based on the month during the redemption period the property is redeemed and that rate relates back to the beginning of the redemption period according to the following schedule:
Month of Redemption Period Amount of Interest Imposed
Property Redeemed
First three months three percent of the bid amount
Months four, five, and six six percent of the bid amount
Months seven, eight, and nine nine percent of the bid amount
Last three months twelve percent of the bid amount
However, in every redemption, the amount of interest due must not exceed the amount of the bid on the property submitted on behalf of the forfeited land commission pursuant to Section 12-51-55.