How is zakat paid by an employee in education?

The employee who pays Zakat must pay Zakat on what he saves from his salary if it reaches the nisab and a full year has passed while it is in his possession without decreasing below it. As for what he saves from his salary during the year after the nisab has been completed, which is known as 'benefited money' (mal mustafad), there is a difference of opinion among scholars regarding how to pay Zakat on it.