Is zakat due on the price of land sold to pay the first installment for an apartment, knowing that it was purchased with the intention of selling it when needed, or not selling it if not needed, and two years have passed since its purchase?

Zakat (definition) is not obligatory on the value of land not intended for trade. Zakat becomes obligatory on its price if it is sold, reaches the nisab (definition), and a year passes over it. If there are outstanding installments for an apartment, they can be deducted from the price of the land when calculating Zakat, if there is no other money to cover them. The remainder, after deducting the debt, is subject to Zakat if it does not fall below the nisab.