بسم الله الرحمن الرحيم
If you became sahib-e-nisab due to the gold which you have last year or including the cash etc then when one year passes over it then include the gold and cash amount with it which you received later and pay the zakah of altogether.
Allah knows Best!
Darul Uloom Deoband
This answer was collected from the official ifta website of Darul Uloom Deoband in India.