"Of their goods, take zakat, so that you might purify and sanctify them." (Qur'an 9:103)
Zakat as translated from Arabic means growth, multiplicity, fertility, cleansing, full of baraqah.
Zakat is the third pillar of Islam and is an ibadah in terms of wealth. A person’s iman is incomplete unless he has performed all the pillars of Islam and a person should not place less importance on any of the pillars.
Performing zakat is to distribute a particular portion of one's wealth on which Allah has made obligatory among the entitled as prescribed in the Quran.
For the individual, Zakat:
Purifies and promotes assets;
Develops gratitude for Allah's bounty;
Brings about a sense of peace and well-being.
For the society, Zakat:
Minimizes the feeling of envy among those who are less well-to-do;
Provides a religiously-approved method of managing the society's economy and finance;
Makes it possible for part of the wealth of the rich to be distributed among the poor.
The following four conditions make Zakat compulsory:
Being a Muslim
Has full ownership of assets.
Nisab (minimum zakatable amount) is reached. (i.e. the approximate market value of 86 grams of gold)
Haul is completed – i.e. having possession of the assets for a complete Hijrah year. (1 Hijrah year = 354.5 days)
Philosophy of Zakat
Brings about protection of property from encroachment and grudge
A means to aid the poor and those in need
Cleanses one's heart from frugality and parsimony
Gives support and dignity to needy Muslims
A means of expressing gratitude to Allah for all His bounties
Zakat is 2.5% of all zakatable wealth that has been in your possession for a lunar year. If your wealth amounts to less than a threshold figure, termed the nisab, then no zakat is payable. This threshold limit is 87.48g (3oz) of gold, or its equivalent in cash.