How is Zakat on money calculated for an original sum, plus an amount borrowed or obtained from an association for an ongoing commercial project that has lasted for more than one year?

Establishing cooperative societies is a project that serves a beneficial interest. The method of Zakat on contributions to them has already been explained. Regarding Zakat on money, debts are deducted from the Zakatable wealth unless there is non-Zakatable wealth exceeding one's needs that covers the debt. If the wealth reaches the nisab after deducting the debt and a full lunar year (hawl) passes over it, Zakat becomes obligatory. The nisab for banknotes is equivalent to 85 grams of gold or 595 grams of silver, and the obligatory amount to be given is 2.5% (a quarter of a tenth).