Calculating overtime pay is more complicated when employees tend to work longer shifts toward the end of an established workweek than at the beginning of that workweek. The amount of overtime may depend on where the workweek begins. Most employers utilize form policies that establish Monday through Sunday workweeks. This standard designation may not be best suited to minimize a particular company’s overtime responsibility. Employers are not required to designate workweeks in order to maximize overtime pay. However, a decision to change an established workweek policy and the implementation of any such change should be handled with care.