 The nisab of silver and silver currency is 200 dirhams, which is approximately 595 grams of pure silver.The nisab of other kinds of money and currency is to be scaled to that of gold; the nisab of money is equivalent to the price of 85 grams of 999-type (pure) gold, on the day in which Zakat is paid.Zakat is obligatory after the money has been in the control of its owner for the span of one lunar year.