The OP column stands for Overtime Premium. Although not used at the present time, it has been put in place to accommodate new Fair Labor Standards Act (FLSA) requirements for certain salaried employees who qualify for overtime (also known as “salaried non-exempt” because they are not exempt from overtime pay). The new FLSA requirements have not yet taken effect, but Procare has the functionality built-in to accommodate them when needed. The Changes to FLSA article provides additional information.
Note: the OP column will not appear on check stubs.