How to Write a Valid Will in Kenya: A Step-by-Step Guide to Section 11 of the Law of Succession Act, Witnesses, Executors and Common Drafting Mistakes

Writing a will is one of the most consequential single acts of personal financial planning a Kenyan can perform. The Law of Succession Act, Cap 160 of the Laws of Kenya, recognises two routes for the disposition of a deceased's estate: testate succession (where the deceased has left a valid will) and intestate succession (where the deceased has left no will, or the will is invalid). The two routes produce dramatically different outcomes for the family. A clean, legally valid will completes the succession process in 6-12 months on average, distributes assets according to the testator's actual wishes, names a chosen executor to manage the estate, can preserve family relationships, and reduces the risk of disputes among beneficiaries. The intestate route — covered in our companion guide to Letters of Administration — applies statutory distribution rules that may diverge significantly from what the deceased would have wished, can take two to five years to complete, and is the leading cause of long-running succession disputes that consume substantial parts of estates in legal costs. Despite the strong case for will-writing, the overwhelming majority of Kenyans die intestate, often because they assume that wills are for the wealthy, or are intimidated by the legal formality, or simply postpone the task indefinitely. This guide demystifies the will-writing process, walks through the statutory requirements under Section 11 of the Law of Succession Act, explains the role of the executor and witnesses, and identifies the common drafting mistakes that invalidate otherwise well-intentioned wills.

Who Can Make a Will

The Law of Succession Act sets out clear requirements for a person to make a valid will. The testator (the person making the will) must be at least 18 years old at the time of making the will; must be of sound mind and capable of understanding the nature and consequence of making a will; and must make the will free from coercion, fraud, or undue influence by any other person. Each of these requirements is a separate test, and failure on any one renders the will potentially invalid.

The "sound mind" test does not require the testator to be in robust general health. A testator may be physically frail, terminally ill, or even confined to bed, and still have full testamentary capacity provided they understand the act of making a will, the nature and extent of the property being disposed of, and the persons who would normally be expected to benefit. The test is functional, not medical. Where there is any doubt about testamentary capacity (because of advanced age, declining cognition, or recent illness), best practice is to obtain a contemporaneous letter from the testator's physician confirming capacity at the date of signing.

The Formal Requirements: Section 11

Section 11 of the Law of Succession Act sets out the formal requirements for a valid written will. A will must be in writing (this can be handwritten, typewritten, or printed; the choice of format does not affect validity); must be signed by the testator (or by another person at the testator's direction and in the testator's presence, where the testator is physically unable to sign); must be signed by the testator in the presence of two or more competent witnesses who are present at the same time; and must be signed or acknowledged by each witness in the presence of the testator.

The witnessing requirement is the most strictly construed of the Section 11 elements. Witnesses must be present simultaneously when the testator signs (or acknowledges a previously made signature). Witnesses signing at different times, or witnesses who did not see the testator sign and were merely asked to attest to a signature later, can invalidate the will. Witnesses must also sign in the testator's presence — typically immediately after the testator's signature.

Who Can Be a Witness

A witness must be of sound mind and adult age. Crucially, a witness should not be a beneficiary under the will, nor the spouse of a beneficiary. The "interested witness" rule reflects the concern that beneficiary witnesses might be tempted to encourage testators to leave them more. The rule is not absolute — the Law of Succession Act provides that if the will is signed in the presence of two non-beneficiary witnesses, the will remains valid even if additional beneficiary witnesses sign. The safer drafting practice is to ensure that all witnesses are persons who derive no benefit from the will and have no spousal or close family relationship to any beneficiary.

Suitable witnesses include the testator's advocate (very common), the testator's bank manager, work colleagues, neighbours not named in the will, and other adult acquaintances of sound mind. The witnesses' addresses and contact information should be recorded clearly on the will, with their full names printed below their signatures, in case the will is later contested and the witnesses need to be called to give evidence.

The Components of a Well-Drafted Will

A well-drafted Kenyan will typically contains the following components in order. The header — typically "Last Will and Testament of [Full Name]" — identifies the document. The introduction — the testator's full names, identification details (National ID number, date of birth), addresses, and the express revocation of any previous wills made by the testator. The appointment of executor(s) — the named person or persons who will administer the estate after the testator's death. A guardianship clause if the testator has minor children — naming the guardian(s) who will care for the children in the event of the testator's death. The dispositive clauses — the specific bequests of named assets to named beneficiaries, the residuary clause directing how the rest of the estate is to be distributed, and any conditions attached to specific gifts. The administrative clauses — directions to the executor on the payment of debts and taxes, the manner of distribution, and any continuing trust arrangements for minor or vulnerable beneficiaries. The attestation clause and signatures — the formal statement that the will has been signed in accordance with Section 11, the testator's signature, and the witnesses' signatures.

The Role of the Executor

The executor is the person named in the will to administer the estate after the testator's death. The executor's duties include: applying to the High Court for a Grant of Probate; gathering all the assets of the estate; paying the deceased's debts and taxes; distributing the residue to the beneficiaries in accordance with the will; and accounting to the beneficiaries and the court for the administration. The executor can be a family member, a trusted friend, an advocate, a bank's trust department, or any combination of these. Many Kenyans appoint two executors — typically a family member alongside an advocate or other professional — to balance personal knowledge with technical competence.

The executor accepts the role on the death of the testator by applying to the court for the Grant of Probate. The grant confers legal authority on the executor to act. The role can be substantial — large or complex estates can require several months of executor work — and the executor is entitled to claim reasonable expenses and, where the will so provides, an executor's remuneration.

The Probate Process

On the testator's death, the executor takes the original will, the death certificate, and supporting documents to the High Court registry serving the deceased's place of residence. The executor files a petition for Grant of Probate. The petition is gazetted for 30 days as public notice that any person with an objection should come forward. If no objection is filed, the court issues the Grant of Probate, which authorises the executor to commence administration. The executor distributes the estate after a six-month waiting period and seeks the Confirmation of the Grant. The process is similar to intestate Letters of Administration (covered in our companion guide) but is procedurally streamlined because the deceased's wishes are documented in the will.

Customary and Religious Aspects

The Law of Succession Act applies to all Kenyans subject to certain limited carve-outs. Muslims may write wills consistent with Islamic law, where succession is governed by the Kadhi's Court under the Muslim Marriage and Divorce Act for matters falling within the Court's jurisdiction. A Muslim's will under Islamic law typically cannot bequeath more than one-third of the estate to non-heirs, with the remaining two-thirds distributed in fixed shares to the prescribed heirs. Customary considerations in some communities also affect succession of specific assets (ancestral land, traditional objects) and well-drafted wills should be sensitive to community customs while remaining within the framework of the Act.

Common Mistakes That Invalidate Wills

First, witnesses who are also beneficiaries. The most common single drafting mistake. Choose witnesses who derive no benefit from the will. Second, witnesses not present together. Witnesses must be present simultaneously when the testator signs. Sequential witnessing is invalid. Third, missing or improperly executed signatures. The testator must sign; the witnesses must sign; the signatures must appear in the proper places; and the attestation clause should confirm the manner of execution. Fourth, ambiguous bequests. "I leave my farm to my children" is ambiguous if the testator has multiple farms or if "children" includes step-children, illegitimate children, or grandchildren. Specific identification of property and named beneficiaries reduces dispute risk. Fifth, attempting to dispose of property the testator does not own. A testator can only dispose of property they own at the time of death. Property held in joint tenancy (with right of survivorship), nominated retirement-benefit accounts, and trusts already established may not pass through the will. Sixth, failure to provide for spouse and dependants. The Law of Succession Act allows certain dependants to apply to court for reasonable provision if a will inadequately provides for them. Adequate provision should be made; otherwise the will may be modified by court order.

Storage and Updating

An executed will should be stored in a place known to the executor and beneficiaries. Common storage locations include the testator's advocate's strong room (most secure and the standard professional practice), a bank safe deposit box, or a fire-proof home safe. The testator should review the will periodically — at minimum on major life events (marriage, divorce, birth of children, death of beneficiaries, major asset acquisitions or disposals) and at any change in personal circumstances. A new will or a codicil (a formal amendment to an existing will) updates the disposition.

The Cost of Will Writing

Engaging an advocate to draft a will is the standard professional approach. Costs vary by the complexity of the estate and the advocate's seniority, but a straightforward family will typically costs KSh 15,000-50,000. The investment is among the highest-value legal expenditures a person can make. The savings in future legal costs, family disputes, and time delay in the administration of the estate frequently run into hundreds of thousands or millions of shillings.

Some Kenyans use will-writing templates or online services. These can produce valid wills for simple estates, but the absence of professional advice means common errors and unforeseen issues are more likely. Where the estate is of substantial value or involves family complexity, professional drafting is strongly recommended.

The Bigger Picture

Will-writing is one of the most universally accessible, highest-return acts of personal financial planning. The legal framework is clear, the formal requirements are modest, and the consequences of getting it right — versus dying intestate — are dramatic for the family left behind. Every adult Kenyan with assets, dependants, or both should write a will, and update it periodically as life circumstances change. The diaspora households we serve at Huduma Global are particularly well-advised to write Kenyan wills covering Kenyan assets (and corresponding wills in their countries of residence covering foreign assets), reducing the substantial cross-border probate complications that befall families that postpone the task. The investment is small. The peace of mind, and the protection of the family, is substantial.

The Kenya Law portal hosts the full text of the Law of Succession Act, Cap 160, and the Probate and Administration Rules. The Judiciary of Kenya publishes the probate court forms and registry directory. The Law Society of Kenya maintains the directory of practising advocates available to draft and witness wills.