What is the current zakat threshold (nisab) that should be considered for zakat payment: is it the nisab of the beginning of the Hijri year (1431 AH), which was 3150 Tunisian dinars, or the nisab of the following Hijri year (1432 AH), which became 5500 Tunisian dinars?

Zakat on money begins when it reaches the nisab, which is equivalent to the value of 85 grams of gold or 595 grams of silver. If the money reaches the nisab and a full year (hawl) passes, Zakat becomes obligatory on it. However, if the money falls below the nisab during the year, Zakat is not obligatory on it.