Inheritance

Islamic Will (Wasiyyah): Rules for a Sharia Will

By the Editorial Team · reviewed against our sources · updated September 2026 · guidance, not a fatwa

What is a wasiyyah?

A wasiyyah is an Islamic will or bequest: an instruction, made while a person is alive, for how part of their wealth should be used after they die. It is one of the few ways a Muslim can shape the destination of their estate, because the bulk of that estate is already governed by the fixed shares of faraid. The Prophetic tradition strongly encourages a believer who has anything to leave not to let two nights pass without having their will written down. A wasiyyah is therefore both an act of worship and a practical safeguard for the family left behind.

Crucially, a wasiyyah operates only at the margins of the estate. It cannot override the compulsory shares, and it cannot be used to favour one heir over another. Instead it carves out a limited, voluntary portion that the person may direct according to their own conscience, most often to relatives who would not otherwise inherit, to friends, or to charitable causes.

The one-third rule

The single most important limit on a wasiyyah is the one-third rule. A person may bequeath no more than one-third of their net estate, the amount left after funeral costs and debts. The origin of this limit is a well-known incident in which a companion, seriously ill, asked whether he could give away two-thirds, then a half of his wealth in charity. He was told no, and that even one-third was a lot, because leaving heirs financially independent is better than leaving them dependent on others.

Anything above one-third is not automatically valid. If a person tries to bequeath more, the excess only takes effect if the legal heirs agree to it after the death. If they do not, the bequest is capped at one-third and the rest returns to the estate to be divided by the fixed shares.

You cannot bequeath to an heir

The second core rule is that a wasiyyah cannot be made in favour of an existing heir. Someone who already receives a fixed share, a spouse, a child, a parent, cannot also be given a bequest, because that would let the deceased quietly redistribute the compulsory shares and favour one heir over the others. The principle is often summarised in the tradition, “there is no bequest for an heir.”

There is one exception: consent. If, after the death, all the other adult heirs freely and knowingly agree to a bequest for one of their number, it becomes valid. This consent cannot be forced or assumed; it must be given once the heirs know exactly what they are agreeing to. Because it is uncertain and easily disputed, relying on future consent is a fragile way to plan. If you want to give more to a particular child, lifetime gifts made equitably are usually a sounder route than a bequest that the others may refuse.

Wasiyyah compared with faraid

People often confuse the voluntary will with the compulsory shares. They are two different mechanisms that operate on two different parts of the estate.

In short, the wasiyyah is the space for personal choice; faraid is the framework that protects the family’s guaranteed entitlements. The two work together, and the calculator on our faraid calculator page assumes the one-third has already been dealt with before it divides the rest.

Debts and funeral costs come first

A wasiyyah is only meaningful once prior claims are met. Funeral expenses are paid first, then all debts. Debts include money owed to people, any unpaid mahr owed to a widow, and, in the view of most scholars, outstanding financial religious duties. Only what remains after these is the base on which the one-third is measured. If a person dies deeply in debt, there may be little or no estate left to bequeath, and the heirs may receive nothing at all. This is why recording debts clearly in a written will is such an important act of fairness to both creditors and heirs.

Appointing executors and guardians

A well-drafted Islamic will does more than allocate the one-third. It names a wasi, an executor, who is responsible for gathering the assets, paying debts, carrying out the bequest and distributing the shares honestly. The executor should be trustworthy, competent and, ideally, familiar with the Islamic rules or willing to take advice on them. For parents of young children, the will is also the place to nominate a guardian, someone who will care for the children and, often separately, manage any wealth they inherit until they reach maturity. Naming these people in advance prevents painful disputes and, in many countries, gives your choices legal weight that a court will respect.

Non-Muslim relatives and bequests

Because fixed-share inheritance does not generally pass between people of different religions, a Muslim who wants to provide for a non-Muslim parent, a spouse’s relative, or a close friend cannot usually do so through faraid. The wasiyyah solves this. A bequest of up to one-third to a non-Muslim who is not a fixed-share heir is permitted in the majority view, and is a common, practical way to honour relationships that the compulsory shares do not reach. It is a good example of how the voluntary third gives room for personal circumstances that the fixed system deliberately leaves untouched.

Charity and sadaqah jariyah

Many Muslims use part or all of their one-third for sadaqah jariyah, ongoing charity whose reward continues after death, such as endowing a well, contributing to a school or mosque, or funding beneficial knowledge. A bequest to charity is not restricted by the “no bequest for an heir” rule, since charities are not heirs, and it is one of the most encouraged uses of the voluntary third. Planning this alongside your lifetime giving, including your obligatory zakat, lets you think about your wealth as a whole rather than in isolated pieces.

Why every Muslim needs a written will

Even though faraid fixes the shares automatically, a written and properly witnessed will remains essential, for several reasons. It records your debts so they are not lost or denied. It states your one-third bequest clearly, avoiding arguments. It appoints your executor and your children’s guardian. Above all, it makes your Islamic wishes enforceable under the civil law of the country you live in. Without one, a secular court will apply its own intestacy rules, which almost never match the Quranic shares, and your estate may be divided in a way you would never have chosen. A good Islamic will is therefore drafted to satisfy both the Sharia and the local legal formalities at once.

A simple worked example

Imagine a net estate of 90,000 after funeral costs and debts. The person has left a valid wasiyyah of one-third to an orphanage and to a non-Muslim friend. One-third of 90,000 is 30,000, which is honoured as directed. The remaining 60,000 is the estate that passes to the legal heirs by faraid. If the person tried instead to bequeath 45,000, half the estate, only 30,000 would take effect unless every other heir agreed to the excess; the surplus 15,000 would return to the heirs. This shows how the one-third acts as a firm ceiling and how the two mechanisms interact in practice. You can model the faraid half of this using the tool on our Islamic inheritance calculator, and read about specific heirs such as the wife, the daughter and the parents. Return to the homepage for our full set of Islamic finance tools.

This page is for general guidance only and is not a fatwa or legal ruling; complex estates need a qualified scholar or Sharia court.

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