In Islam, the obligatory almsgiving pillar is called zakat. It is a required form of charitable giving for Muslims whose qualifying wealth reaches the relevant threshold.
Zakat is commonly calculated on certain forms of accumulated wealth and is traditionally associated with a rate of 2.5 percent for qualifying monetary wealth held for a lunar year. Detailed rules vary by asset type and legal school, so the simple rate is not a universal calculation for every possession.
Zakat differs from sadaqah, which is voluntary charity. Islamic teachings identify categories of eligible recipients, including the poor and needy. Zakat is therefore both an act of worship and a structured social obligation.