Eight Factors That Can Affect Your Pay

7. Shift differentials

In certain jobs, workers may be expected to perform tasks during less favorable shift times. These employees are typically paid a premium due to the higher social and physical costs involved in working outside "normal work hours." In jobs that don't normally operate on more than one shift, the differential is negligible and usually only taken into account when a nonsalaried employee works overtime or on a special project.

Negotiation tip: You can expect to earn a little extra for working the 2nd or 3rd shift.