Most people die intestate. The cultural assumption is "the family will sort it out." The legal reality — a thicket of statutory rules, different for each religion — often surprises everyone.
Industry estimates suggest that more than 90% of people die intestate — without having executed a valid Will. The figure is even higher in urban professional households than people typically assume, because the cohort most capable of drafting a Will is also the cohort most likely to assume it can be done "next year."
When someone dies intestate, their estate does not pass according to their wishes. It passes according to the rules of intestate succession applicable to their religion or community.
On the intestate death of a Hindu male, the estate devolves first on the Class I heirs as listed in the Schedule — primarily the widow, mother, and children (with daughters now coparceners post-2005 amendment, per Vineeta Sharma v. Rakesh Sharma, 2020). Each takes a per-capita share. If there are no Class I heirs, the estate moves to Class II heirs, then to agnates, then to cognates, in a defined hierarchy.
For a Hindu female dying intestate, Section 15 sets out a separate scheme — and the source of the property (inherited from parents vs. inherited from husband vs. self-acquired) materially affects who inherits.
Muslim intestate succession is governed by personal law (Sunni or Shia), with fixed shares prescribed for sharers, residuaries, and (under Shia rules) distant kindred. The shares are mathematically defined and do not permit family-discretionary redistribution.
A Muslim is also subject to the one-third rule: by Will, a Muslim can dispose of only one-third of the estate without the consent of the heirs. The remaining two-thirds devolves by personal law regardless of the testator's wishes.
The Indian Succession Act, 1925 governs intestate succession for Christians (Part V), Parsis (Part V, Chapter III), and inter-faith couples married under the Special Marriage Act, 1954. The shares of the widow/widower, children, and parents differ across these categories.
Three reasons, in increasing order of seriousness:
A valid Will, executed under Section 63 of the Indian Succession Act, 1925, allows you to:
Intestate succession is not a "default" in a neutral sense. It is a statutory regime designed to fairly distribute the estate of someone who never told anyone what they wanted. If you do have a view on what should happen — and most people do — a Will is the only instrument that records it bindingly.