Nisab is the minimum wealth threshold that determines whether many Muslims owe zakat.
Zakat is not calculated identically for every person or every asset. Nisab sets a qualifying level for certain forms of wealth, traditionally linked to the value of gold or silver. If qualifying wealth reaches the threshold and remains there for a lunar year, a person may become liable for zakat under commonly applied rules.
The exact threshold can vary because gold and silver produce different market values, and Muslim authorities differ over which standard to use. Other factors include debts, asset type, agricultural production, livestock, and local legal interpretation. For savings and similar monetary assets, a frequently used annual rate is 2.5 percent.
Nisab should not be confused with zakat al-fitr, a separate end-of-Ramadan charitable obligation, or with sadaqah, voluntary charity. Because calculations can be complex, Muslims often consult a trusted scholar or a recognized zakat calculator before giving.