Is zakat obligatory on a loan amount of 90,0 Riyals, which has been held for a full year (hawl), and which I had saved to build part of my house?

Zakat becomes obligatory on the aforementioned amount after the completion of one lunar year (hawl) and after deducting debts that are not offset by other assets. Whatever remains is subject to Zakat if it reaches the nisab. The nisab is equivalent to the value of 85 grams of gold, and the amount of Zakat that must be paid is 2.5%.