Zakat is a charitable tax, used to help the poor and is believed to "purify, increase and bless the remainder of one's wealth," according to Islamic Relief Worldwide. To calculate Zakat, which consists of 2.5 percent of one's net worth, various things are taken into consideration, including savings and the value of property. Paying Zakat is another part of obeying Allah's commandments and earning his favor while helping those who are in need to better the world.