Is zakat immediately obligatory upon selling an inherited land and distributing its price, or must a full hawl (year) be awaited, knowing that a portion of the money was used to pay off monthly debts?

The inherited land's value is not subject to zakat now; rather, each heir will begin a new lunar year with their share. Zakat becomes obligatory if a lunar year has passed and the heir's share constitutes a full Nisab on its own, or by combining it with other money or trade goods. Whoever possesses less than the Nisab, or consumes their share during the year, owes no zakat.

The Nisab for banknotes is equivalent to 85 grams of gold or 595 grams of silver, and the amount due is a quarter of a tenth (2.5%).