Muslim succession is governed primarily by personal law rather than the Indian Succession Act, 1925. The Will — wasiyat — exists, but operates within a defined and structurally different framework. Most confusion in Muslim families about Wills traces back to a single rule: the one-third limit.
When most Indians think about Wills, they think about the Indian Succession Act, 1925 — Section 63, witnesses, probate, executors. For Muslims, almost none of that primary framework applies in the same way. Muslim succession is governed by Muslim Personal Law (Shariat) Application Act, 1937, which makes the personal law of the parties — Sunni or Shia, as the case may be — applicable to questions of inheritance and Wills.
This is not a quirk. It reflects a fundamentally different conception of what a Will is. Under classical Islamic jurisprudence, the Will is a voluntary disposition, but it operates within a strict matrix of fixed shares already dictated by religion. The Will does not displace those shares. It supplements them, within limits.
Understanding those limits is everything. A Muslim Will that ignores them is not partially invalid — large parts of it simply do not operate, no matter what the testator wrote.
The bedrock rule of wasiyat is this: a Muslim may by Will dispose of only up to one-third of the net estate, and that one-third must go to non-heirs, unless the legal heirs consent to a different arrangement after the testator's death.
Read those two qualifications carefully. The one-third limit applies to bequests in favour of non-heirs. Bequests in favour of heirs — that is, persons who would already inherit a fixed share under personal law — require the consent of all the other heirs after the death, regardless of whether they fall within the one-third or exceed it.
This single rule explains why a Muslim Will tends to be a much smaller document than a Hindu or Christian Will. The Muslim testator simply has less legal room to redistribute the estate by Will. The remaining two-thirds devolves automatically to the legal heirs in fixed shares.
Under Sunni law, the heirs are divided into three classes: sharers (those entitled to a fixed share under the Quran, such as the spouse, parents, and daughters), residuaries (relatives who take what remains after sharers, principally sons and other male agnates), and distant kindred (cognates who inherit only in the absence of sharers and residuaries).
Under Shia law, the classification is different — three classes based on degree of consanguinity, with each class excluding the next. The doctrines of representation and substitution also differ, with Shia law generally more generous to lineal descendants of pre-deceased heirs.
The point is: 'heir' is a defined legal category, not a colloquial one. The husband's brother is not an heir if the husband has surviving sons. The grandson is not an heir if the son is alive. Whether someone counts as an heir for the consent rule depends on what the family configuration looks like at the moment of the testator's death.
On the one-third rule itself, the two schools broadly agree. The first key difference is in what happens to bequests beyond one-third made in favour of heirs.
Under Sunni law, a bequest to an heir is void in its entirety unless the other heirs consent — even if the bequest is well within the one-third limit. Under Shia law, the position is more permissive: a bequest to an heir up to one-third is valid even without the other heirs' consent.
The second difference is in what 'consent' means. Under Sunni law, consent must be given after the testator's death (consent given during the lifetime is not binding). Under Shia law, consent given during the testator's lifetime and ratified after death is binding.
Unlike a Will under the Indian Succession Act, 1925, a Muslim Will does not require attestation by two witnesses. It can be made orally or in writing. There are no statutory formalities of execution.
This is not a licence to be careless. The burden of proving the existence and content of a Will rests on the person setting it up. A written, properly dated, ideally witnessed Will is enormously easier to prove than an oral one. We almost always recommend writing.
The Will should clearly identify the testator, the property, the beneficiaries, and the share each beneficiary is to receive. It should be signed and dated. While not legally required for validity, witnesses give it evidentiary weight.
A wasiyat is revocable at any time during the testator's lifetime — by express revocation, by a fresh inconsistent Will, or by an act that destroys the subject matter of the bequest (such as selling the bequeathed property).
Conditional bequests — 'this property goes to A if A reaches the age of 25' — are recognised, but the conditions must be lawful and certain. Bequests for unlawful purposes are void. Bequests with impossible conditions are void.
Bequests of property the testator does not own are void. This sounds obvious but it is a frequent issue in business families where the testator believes they own something — say, a share of an ancestral business — but legally they do not.
Increasingly, our practice sees families where one spouse is Muslim and the other is not, or where children of an inter-faith marriage hold property in different religious capacities. The classification of which law applies to which inheritance can become genuinely complicated.
The general rule is that Muslim Personal Law applies to a deceased Muslim's estate, and the deceased's religion at the time of death is what governs. If a Hindu marries a Muslim under the Special Marriage Act, 1954, the position is somewhat altered — the Indian Succession Act, 1925 applies to such marriages and certain bequests can override personal law.
This is a domain where you should not draft from a template. A clean piece of advice we give NRI Muslim clients is: have your Will reviewed in both the country of your residence and in India, especially if you have substantial assets in both.
A widower with two sons and one daughter dies leaving an estate of ₹3 crore. He wants to leave ₹1 crore to a charitable trust. Under the one-third rule, he can validly bequeath up to ₹1 crore to the trust — that is exactly one-third — without consent. The remaining ₹2 crore devolves under personal law: two-thirds to the two sons (one-third each, ₹66.67 lakh each), one-third to the daughter (₹33.33 lakh, under the 2:1 son:daughter ratio).
Same family. He now wants to leave ₹2 crore to the trust and only ₹1 crore to be inherited. The portion exceeding one-third — i.e. ₹1 crore beyond the permitted ₹1 crore — requires consent of all legal heirs after death. If even one son or the daughter objects, the excess fails and the estate is redistributed on the personal-law shares.
Same family. He wants to leave ₹50 lakh to his daughter specifically by Will, in addition to her statutory share. Under Sunni law, this bequest fails entirely unless the sons consent (because it is a bequest to an heir). Under Shia law, a bequest of ₹50 lakh to the daughter is within the one-third limit and operates without consent.
Identify whether you fall under Sunni or Shia law (in India, the vast majority of Muslims follow Sunni Hanafi law, but Shia communities are concentrated in particular regions). Confirm with a knowledgeable family elder or a religious authority if you are uncertain.
Take an honest inventory of your assets, distinguishing between what is genuinely yours to bequeath and what is held jointly or in a representative capacity. Identify your legal heirs as they would stand on the date of death.
Decide what you want to do with your one-third. Common uses: charitable bequests, provision for non-heir relations (foster children, distant relatives, a long-serving employee), provision for an unequal arrangement among heirs that you are willing to leave to their post-mortem consent.
Document it clearly. Sign it. Date it. Have two reliable witnesses for evidentiary value even though Muslim law does not strictly require them. Tell your immediate family where it is kept.
Muslim estate planning in India is genuinely well-developed under personal law. The one-third rule is not a constraint to be worked around — it is a settled compromise between testamentary freedom and the religious duty to fixed-share inheritance.
Where families get into trouble is when they try to write a Will that distributes the entire estate as if the testator had full freedom. The Will then runs into the wall of personal law and large parts of it become inoperative — leaving the family with all the emotional consequences of the testator's intentions and none of the legal effect.
Done properly, a wasiyat sits cleanly alongside personal law: it deploys the one-third the testator can control, and lets the remaining two-thirds devolve in the manner already prescribed. That is the cleanest gift, and the one most likely to be respected.
A wakf is a dedication of property to a religious or charitable purpose under Muslim law. A wasiyat is a testamentary disposition. The two are distinct but sometimes conflated.
A wakf typically vests the property in a mutawalli (manager) for the use of the beneficiaries — often a mosque, madrasa, or charitable cause. The one-third rule applies to wakfs created by Will (i.e., a testamentary wakf cannot exceed one-third). A wakf created during life can encompass any portion of the donor's property.
Where the testator wishes to dedicate property to religious purposes, an inter vivos wakf during life is usually a cleaner instrument than a testamentary wakf, since it avoids the one-third constraint.
Muslim women have full Will-making capacity under personal law, equal to that of men. There is no restriction on a Muslim woman drafting a wasiyat in respect of her self-acquired property, mehr received, or property gifted to her.
The one-third limit and the consent rules apply equally. The legal heirs of a Muslim woman are determined under the personal law applicable to her, and the categorisation works the same way.
We have seen a number of Muslim women clients who hold substantial separate property — often inherited from their parents, or earned through their own businesses — who benefit greatly from drafting a clear wasiyat to direct that property to their preferred non-heirs or to charity within the one-third allowance.
Imran sahib, age 68, has an estate worth approximately ₹6 crore: a Bandra flat (₹3.5 crore), a Borivali office property (₹1.5 crore), bank fixed deposits (₹60 lakh), listed equity (₹35 lakh), and personal effects (₹5 lakh). His family consists of his wife (Salma), two sons (Faraz and Naveed), and one daughter (Aisha).
Imran sahib follows Sunni Hanafi law. He wants to leave ₹50 lakh to a Pune-based charitable trust that runs a school for underprivileged children — a cause he has supported during his life. He also wants Aisha to receive an additional ₹40 lakh beyond her statutory share because she is the only daughter and unmarried.
The ₹50 lakh to the trust is well within the one-third limit (one-third of ₹6 crore is ₹2 crore) and operates without consent. The ₹40 lakh to Aisha, however, is a bequest to an heir under Sunni law and requires the consent of Salma, Faraz, and Naveed after Imran sahib's death. If any of them object, that portion fails and Aisha receives only her statutory share.
The cleanest fix is to gift ₹40 lakh to Aisha during Imran sahib's lifetime — through a hiba (Muslim gift), which is fully recognised under personal law and is not subject to the one-third constraint. The remaining estate then devolves under personal law on death, with the trust receiving its ₹50 lakh from the one-third allowance.