We all have to deal with Prevailing Wage Pay Scale changes at one point or another, and unlike in just about any other situation, when the pay increase goes into effect with the beginning of the next workweek - Prevailing Wage pay scale increases become effective with the first day of a specific month, usually June 1. Although, this too, can depend upon where your business is located, and/or any Union rules that you must follow.
Correctly handling this "change" in pay is easily accomplished by creating a new payroll item, and "switching" payroll items in the timesheet, when the increase becomes effective - just like you do when an employee "switches" work classifications on the job.
This article deals with correctly handling pay scale changes, as well as, some of the incorrect ways that you might have done this, and provides alternative methods for getting your Certified Payroll Reports out.
4 pages with screenshots.