What is the zakatable threshold (nisab) to be considered for accumulated wealth if the nisab changes between the beginning and the end of the Hawl (lunar year), and should one consider the declared nisab at the time the Hawl is completed, or the prevailing nisab throughout the year?

The nisab (minimum threshold for zakat) is fixed and unchangeable. It is five awāq of silver (approximately 595 grams) or twenty dinars of gold (approximately 85 grams). Paper currencies are valued at the lower of the two nisabs (gold or silver); this is more absolving for one's responsibility and more beneficial for the poor, and it is also based on what scholars have stated regarding trade goods, that they are valued at the lower of the two nisabs.

If the value of paper currencies reaches the nisab at the beginning of the hawl (zakat year) but then falls below the nisab during the hawl, zakat is not obligatory on them. If one acquires additional paper currency that, when combined with what one already possesses, reaches the nisab, or if its value increases to reach the nisab, a new hawl begins.

If the hawl passes while one possesses the nisab or more, then one pays zakat on what has completed its hawl, except for trade profits, which are zakatable along with their principal, even if a hawl has not passed over them.