question| Can we use our khums to pay for the renovations of a mosque?
answer| Given the current circumstances, the use of khums for such purposes is inadmissible. You may use zakāt or the donations collected from the believers for the purpose in question.
 Khums is the religious tax that, generally speaking, affects the surplus of one’s annual income. That is, if at the end of one’s religious fiscal year (al-sanah al-khumsīyyah) one is left with a surplus of income after calculating all of the year’s expenses, the surplus is subject to the tax of khums, which is one-fifth of the surplus, which must be submitted to one’s authority-in-deference (marjaʻ taqlīd) or to the jurisprudent-ruler (walīyy al-faqīh). Zakāt, on the other hand, is a religious tax that applies to certain items (such as gold, silver, wheat, barley) if one possesses a certain amount of them as specified in Islamic law. Khums is, generally speaking, a universally applicable religious tax, whereas zakāt is much less frequently applicable. Also, the purposes for which these two types of religious tax may be used are different.