W. Va. Code § 18-9A-11
(a) On the basis of each county's certificates of valuation as to all classes of property as determined and published by the assessors pursuant to section six, article three, chapter eleven of this code for the next ensuing fiscal year in reliance upon the assessed values annually developed by each county assessor pursuant to articles one-c and three of that chapter, the state board shall for each county compute by application of the levies for general current expense purposes, as defined in section two of this article, the amount of revenue which the levies would produce if levied upon one hundred percent of the assessed value of each of the several classes of property contained in the report or revised report of the value made to it by the Tax Commissioner as follows:
(2) For each fiscal year beginning before July 1, 2014, the state board shall then apply these rates to the assessed taxable value of other property in each classification in the county as determined by the Tax Commissioner and shall deduct therefrom five percent as an allowance for the usual losses in collections due to discounts, exonerations, delinquencies and the like. For each fiscal year beginning after June 30, 2014, the state board shall then apply these rates to the assessed taxable value of other property in each classification in the county as determined by the Tax Commissioner and shall deduct therefrom four percent as an allowance for the usual losses in collections due to discounts, exonerations, delinquencies and the like. All of the amount so determined shall be added to the ninety-five or ninety-six percent, as applicable, of public utility taxes computed as provided in subdivision (1) of this subsection and this total shall be further reduced by the amount due each county assessor's office pursuant to section eight, article one-c, chapter eleven of this code and this amount shall be the local share of the particular county.
As to any estimations or preliminary computations of local share required prior to the report to the Legislature by the Tax Commissioner, the state shall use the most recent projections or estimations that may be available from the Tax Department for that purpose.