Writing a Valid Islamic Will

The writing of an Islamic will — wasiyyah — is described by the Prophet Muhammad (peace be upon him) as an obligation upon every Muslim who has something to bequeath. The Prophet's well-known statement in the hadith of Abdullah ibn Umar makes the urgency of this obligation clear: 'It is the duty of a Muslim who has anything to bequeath not to let two nights pass without including it in his will.' This hadith establishes that procrastination in the matter of will-writing is a form of negligence toward one's family and toward one's religious obligations.

The Islamic will (wasiyyah) serves several important functions simultaneously. It provides for the distribution of up to one-third of the deceased's estate according to their own wishes — to individuals or organizations that would not otherwise inherit, or for charitable causes. It affirms the deceased's Islamic faith and requests Islamic burial rites. It can designate a guardian for minor children. It can record outstanding debts and obligations. And it can provide practical instructions for the administration of the estate that simplify the burden on the deceased's family at a time of grief.

The Islamic will is governed by specific legal requirements. The most important is the one-third rule: a Muslim may freely bequeath up to one-third of their estate to non-heirs; any bequest that exceeds one-third is invalid unless the heirs consent to it after the person's death. This one-third limitation reflects the balance between the individual's testamentary freedom and the rights of the Quranic heirs, whose shares are divine obligations that the deceased cannot override through their will. A bequest to a legal heir is entirely invalid in the Hanafi, Shafi'i, and Hanbali schools (without the other heirs' consent), reflecting the principle that 'there is no bequest for an heir.'

The person making the will must be of sound mind and legal capacity — a minor, an insane person, or one under duress cannot make a legally valid will. The will should specify the bequests clearly and unambiguously, avoid illegal bequests (those to institutions promoting prohibition or immoral causes), and be witnessed by two reliable Muslim adults. The will should be updated whenever the person's circumstances change significantly — through marriage, divorce, the birth of children, or significant changes in the composition of the estate.

Contemporary Muslims in Western countries face the additional complexity of ensuring that their Islamic will is also legally valid according to the secular law of their country of residence. A will that is Islamically correct but not legally enforceable in the country where the estate is administered is ineffective in practice. Siddiqi provides guidance on how to draft a will that satisfies both Islamic requirements and the legal formalities of a secular jurisdiction — a task that requires careful coordination with both an Islamic scholar who can verify the Islamic correctness of the inheritance calculations and a secular attorney who can ensure the will's legal validity.

The wasiyyah should also address the deceased's religious obligations that could not be fulfilled during their lifetime — outstanding Hajj if never performed, qada prayers and fasts, unpaid zakah. The scholarly tradition holds that compensatory payment from the estate for these unfulfilled obligations is permissible and can be included in the will, providing the deceased's family with clear guidance on how to address these spiritual obligations on behalf of their loved one.