What is the effect of purchasing an apartment in installments on the money subject to zakat, and is this considered a debt?

The price of the aforementioned apartment is considered a debt you owe to the company. Scholars have differed on whether debt should be deducted from Zakat. The more cautious opinion is that debt should not be deducted; rather, a person should pay Zakat on all their Zakat-eligible wealth, regardless of any debts they may have.