PC_USAGE_CODE is a mandatory 4-digit numeric field which displays the High Line assigned [pay component usage|PAY COMPONENT USAGES] code which uniquely categorizes when and how the [pay component|PAY COMPONENTS] is to be used during the pay calculation. For example, the Usages of Net Pay indicates that this will be the [Pay Component|PAY COMPONENTS] used to store the net Pay amount that is calculated through [UPCALC] (Payroll Calculation).