بسم الله الرحمن الرحيم
(Fatwa: 1312/986/B=10/1434)
Mahr is in fact the compensation of living with wife. The minimum amount of mahr is 30.618 gram silver, as the rate of silver fluctuates therefore the amount in rupees may not be fixed. The maximum amount of mahr was not prescribed in Shariah. One can agree upon any amount which he can pay as per his ease. If the mahr is much which one cannot pay once then one can pay it in instalments. It is lawful and easy if the mahr was decided to be with late payment.
Allah knows Best!
Darul Ifta,
Darul Uloom Deoband