S.C. Code Ann. § 3-7-150: Basis of payments of sums in lieu of taxes.

The amount of any payment of sums in lieu of taxes may be based on the estimated costs to each political subdivision, for and on whose behalf an agreement is entered into, of performing services for the benefit of a project during the period of an agreement, after taking into consideration the benefits to be derived by the political subdivision from such project, but shall not be in excess of the taxes which would result to the political subdivision for such period if the real property of the project within the political subdivision were taxable.