Is zakat obligatory on an amount of EGP 25,000 deposited in an Islamic bank, generating a fluctuating profit, considering the existence of a pension and exorbitant monthly medical expenses?

Zakat is obligatory on all wealth that reaches the nisab (minimum threshold) and on which a full Hijri year has passed while it is in the owner's possession. The nisab is approximately equivalent to 85 grams of gold or 595 grams of silver. If a full year passes on your wealth and it has not fallen below the nisab, then you are obligated to pay Zakat. Anything spent during the year is not subject to Zakat. Zakat increases wealth and blesses it, in affirmation of Allah Almighty's saying: "And whatever you spend of anything [for His cause], He will compensate it; and He is the best of providers."