S.C. Code Ann. § 12-37-935
(A) Except as provided in Section 12-37-930 for custom molds and dies used in the conduct of manufacturing electronic interconnection component assembly devices for computers and computer peripherals, and equipment used in the manufacture of tires by manufacturers who employ more than five thousand employees in this State and have over one billion dollars in capital investment in this State, the original cost must not be reduced more than the percentage provided in the following schedule:
Property Tax Year Maximum Percentage Depreciation
Before 1997 80 percent
1997 83.3 percent
1998 86.6 percent
After 1998 90 percent.