بسم الله الرحمن الرحيم
(Fatwa: 960/000/B=1434)
When the due time of zakah will arrive, it shall be necessary for you to pay the zakah i.e. the fortieth part of the cash money as well the value of the land at that time. If you owe some debts then the debt amount shall be deducted from the total value of the land.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband
