Is Zakat obligatory on an amount of ten million Algerian centimes (100,0 Algerian Dinars) representing bonuses not received from a government institution for over 15 years?

Zakat (definition) is obligatory on money that has reached the nisab (definition) and a full year has passed over it for the preceding years, because its ruling is like that of a debt whose zakat becomes obligatory upon its collection for all the past years. What was paid for the first year is deducted from what is due for zakat in the second year, and so on. However, if it has not reached the nisab, zakat is not obligatory until a year has passed from the time it reached the nisab, and its zakat is paid for all the years in which it had reached the nisab.