Is zakat obligatory on inheritance, and what among it is subject to zakat—money or land and a house—and when does its obligation begin? And is zakat obligatory on a monthly sum that reaches the nisab through saving after the death of the inheritor?

Zakat is first disbursed from the inheritance if it was obligatory upon the deceased before their death and they did not pay it. In this case, it is considered a debt upon the estate and is disbursed before its distribution. However, if there was no obligatory zakat upon the deceased, then each heir examines their share of the inheritance. If it consists of zakatable assets and reaches the nisab (minimum threshold), they observe a hawl (lunar year) from the day of the inheritor's death and pay its zakat after the hawl has passed, which is a quarter of a tenth (2.5%). So, if you are the legal owner of the amount you receive, and it reaches the nisab and a hawl passes over it, its zakat becomes obligatory upon you.