Nisab

In Sharia (Islamic Law) niṣāb (نِصاب) is the minimum amount for a Muslim net worth to be obligated to give zakat. Several hadith have formulas for calculating niṣāb, the most prominent of which declares that No Zakāt is due on wealth until one year passes. Zakat is determined based on the amount of wealth acquired; the greater one's assets, the greater the tax. Unlike income tax in secular states niṣāb is not subject to special exemptions.