Wills and Testamentary Dispositions in Kuwaiti Law: Rules, Limits, and Procedures
18 August 2026

A comprehensive guide to the rules governing wills in Kuwait under Personal Status Law No. 51/1984, covering capacity, the one-third limit, types of bequests, the mandatory will for grandchildren, executor duties, and dispute resolution.

Wills and testamentary dispositions occupy a central place in Kuwaiti law, standing at the intersection of Islamic jurisprudence and modern legislation. The Kuwaiti Personal Status Law No. 51 of 1984, in Articles 212 through 274, provides a detailed framework governing how individuals may dispose of their wealth after death. Understanding these rules is essential for residents and citizens alike, whether they wish to make a will, contest one, or claim their rights under the mandatory will provisions.

Definition of a Will and Its Distinction from Inheritance

Under Kuwaiti law, a will (wasiyya) is a voluntary disposition of property that takes effect upon the testator's death. It is a unilateral act — meaning the testator creates it by their own free will — and the beneficiary may accept or reject it after the testator passes away.

A will must be distinguished from inheritance (mirath), which operates automatically by force of Islamic law and statute. Key differences include:

  • Source: Inheritance is mandated by Sharia; a will is created by the testator's volition.
  • Beneficiaries: Inheritance goes to legally designated heirs in fixed shares; a will is generally directed to non-heirs.
  • Limits: An heir receives their full statutory share; a will is capped at one-third of the net estate.
  • Acceptance: Inheritance vests automatically; a will may be accepted or rejected by the beneficiary.

Capacity to Make a Will

For a will to be valid under Kuwaiti law, the testator must satisfy several conditions:

  • Age and mental competence: The testator must be of legal age and of sound mind. A will made by a minor lacking discernment or by a person during a period of insanity is void.
  • Free will: The will must be made voluntarily, free from duress or undue influence.
  • Ownership: The testator must own the bequeathed property or be entitled to it at the time of death.

The beneficiary must be ascertainable, must exist or be expected to exist (such as an unborn child), and must not have intentionally killed the testator.

The One-Third Rule

Perhaps the most fundamental constraint on testamentary freedom in Kuwaiti law is the one-third limit. Rooted in Prophetic tradition, this rule provides that no person may bequeath more than one-third of their net estate — calculated after payment of funeral expenses and all outstanding debts.

The purpose of this rule is to protect the rights of legal heirs to their Sharia-mandated shares. If a will exceeds the one-third threshold, the excess is not automatically void; rather, it is contingent on the consent of the heirs. Only after the testator's death may heirs — who must be of full legal capacity — choose to approve or reject the excess. If they approve, the full will is executed; if they reject it, the will is reduced to one-third.

Prohibition of Wills in Favor of Heirs

As a general rule, Kuwaiti law prohibits a testator from making a will in favor of a legal heir (wasiyya lil-warith). This prohibition prevents circumvention of the inheritance system and ensures fairness among heirs.

However, there is an important exception: a will in favor of an heir becomes valid if the remaining heirs consent after the testator's death. The consent must be given freely by heirs of full legal capacity. Whether someone qualifies as an heir is determined at the time of the testator's death, not at the time the will was created.

Types of Testamentary Dispositions

Kuwaiti law recognizes several forms of testamentary dispositions:

  • Specific bequest (wasiyya bil-'ayn): A bequest of a specific asset, such as a particular property, vehicle, or sum of money.
  • Fractional bequest: A bequest of a fraction or percentage of the estate, such as one-quarter or one-fifth.
  • Conditional will: A will whose effect is contingent on a specified lawful condition being met.
  • Charitable will: A bequest for charitable purposes — such as building a mosque, funding education, or supporting the needy — subject to the same one-third limit.
  • Will for an unborn child: A valid bequest may be made in favor of a fetus, provided the child is born alive within the legally recognized period.

The Mandatory Will (Al-Wasiyya Al-Wajiba)

One of the most significant provisions in Kuwaiti personal status law is the mandatory will. This legal mechanism protects grandchildren who are excluded from inheritance because their parent (the testator's son or daughter) predeceased the grandparent.

Under this system, such grandchildren are entitled — by operation of law, without any testamentary act by the deceased — to a share equivalent to what their deceased parent would have inherited, up to a maximum of one-third of the estate. Key features of the mandatory will:

  • It arises automatically and does not require a written will.
  • It takes priority over voluntary wills if the one-third is insufficient to cover both.
  • The heirs cannot refuse or contest it.
  • It applies to the first generation of children of predeceased sons and daughters, with further rules for lower generations as specified by law.

Form Requirements, Registration, and Proof

Kuwaiti law does not prescribe a mandatory form for a valid will. A will may be:

  • Written: The most reliable form — either handwritten by the testator or prepared by a third party and signed by the testator.
  • Oral: Valid if made before at least two competent witnesses, though more difficult to prove.
  • By gesture: Permitted for those physically unable to speak or write, provided the gestures are clearly understood.

While registration is not a formal requirement for validity, it is strongly recommended. Wills can be authenticated before the Documentation Department at the Ministry of Justice. Proof of a will in court may be established through witness testimony, the heirs' acknowledgment, signed documents, or a judicial ruling.

Revocation and Lapse of Wills

A will is revocable at any time during the testator's lifetime. Revocation may occur:

  • Expressly: Through a clear written or oral declaration of revocation.
  • Impliedly: Through conduct inconsistent with the will, such as selling or gifting the bequeathed property, or making a new will that contradicts the earlier one.
  • By destruction: If the testator destroys the bequeathed property, the will is deemed revoked.

A will also lapses if the beneficiary dies before the testator, rejects the bequest after the testator's death, or if the bequeathed property is destroyed before the testator's death.

The Executor (Wasi): Appointment, Powers, and Removal

The executor (wasi) is the person appointed by the testator to carry out the will and, in many cases, to manage the affairs of the testator's minor children. The executor must be an adult of sound mind, trustworthy, and free from any conflict of interest with the beneficiaries.

An executor's powers include managing the estate and the minor's property in their best interest, subject to court-imposed restrictions on major transactions such as selling real estate. The court may remove an executor who breaches their duties, proves dishonest, or becomes unable to perform their role.

Priority of Claims Against the Estate

Kuwaiti law establishes a strict order of priority for claims against a deceased person's estate:

  • First: Funeral and burial expenses.
  • Second: Payment of all outstanding debts.
  • Third: Execution of wills (within one-third of the remaining estate).
  • Fourth: Distribution of the remainder to legal heirs according to their Sharia-mandated shares.

This means that debts always take precedence over wills. If debts consume the entire estate, the will cannot be executed. Furthermore, the mandatory will takes priority over voluntary wills when the one-third is insufficient to satisfy both.

Special Rules for Non-Muslims

Non-Muslim residents of Kuwait may be subject to different rules regarding testamentary dispositions. Kuwaiti law generally grants non-Muslims greater flexibility, as they may not be bound by the one-third limitation or the prohibition on bequests to heirs with the same strictness applied to Muslims. The applicable rules depend on the individual's personal religious law, and Kuwaiti courts adjudicate such matters according to specialized provisions.

Will Disputes and Litigation

Disputes over wills arise in various forms, including:

  • Challenges to the validity of the will based on the testator's lack of capacity, duress, or forgery.
  • Claims that the will exceeds the one-third limit.
  • Objections to a will made in favor of an heir without the consent of other heirs.
  • Disputes over the existence or authenticity of the will.
  • Disagreements over the mandatory will's scope and beneficiaries.
  • Actions to remove or hold an executor accountable.

These disputes fall within the jurisdiction of the Personal Status Courts, with appeals available to the Court of Appeal and ultimately the Court of Cassation.

Practical Guidance

To ensure your will is valid, enforceable, and free from future disputes, consider the following steps:

  • Put the will in writing and have it officially authenticated at the Ministry of Justice.
  • Stay within the one-third limit of your net estate.
  • Avoid bequests to legal heirs unless you are confident the other heirs will consent.
  • Clearly identify the bequeathed property or the fraction of the estate.
  • Appoint a trustworthy and capable executor.
  • Have at least two reliable witnesses attest to the will.
  • Review and update your will periodically as your circumstances change.

Wills are a vital legal instrument for securing your wishes and protecting those you care about. However, they are governed by precise rules that must be carefully observed. Whether you need to draft a will, challenge an existing one, or claim your rights under the mandatory will provisions, Yumnaak Law Firm is here to provide expert legal counsel tailored to your situation under Kuwaiti law.

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