South Carolina Code of Regulations — Chapter 117 (Revenue)
S.C. Code Regs. 117-313.3 — Installation Charges
Not subject to the sales or use tax are charges for installation incident to the sale of tangible personal
property when such charges are separately stated from the sales price of the property on billing to
customers and provided the seller's books and records of account show the reasonableness of such
labor in relation to the sales price of the property.
Source: official text