Q: Is Wa Iyaakum the correct reply of Jazakallah? What is the Masnoon answer of Jazakallah?
A: There is no masnoon or sunnat reply to Jazakallah. However, since the term jazakallah is a dua, meaning “May Allah Reward you” we may reply with the words ‘aameen’. Aameen is said after every dua.
And Allah knows best
Mufti Siraj Desai