Zakat is the amount of money each Muslim adult should give to supply categories of people. Zakat means "purification" and "growth". If the individual has means of income, they are required to give. The zakat is calculated by each person based on what they make and the debts they have. Also, zakat is due after the passage of one lunar year and also the person should decut their debts from others. This money goes to the needy and is an example of how charity is an important to Muslims as well.