For non-Muslims in Singapore, the answer is generally yes. Singapore recognises testamentary freedom, which means you may leave your estate broadly as you wish, and a child has no automatic entitlement to a share under your will. There is no forced heirship rule of the kind found in many civil law countries, and no fixed percentage that must go to children.

That is the direct answer most people are looking for. But there are three qualifications that matter, and skipping them is how a carefully considered decision turns into litigation: the Inheritance (Family Provision) Act, the very different position on intestacy, and the entirely separate rules that apply to Muslim estates.

Testamentary freedom is the starting point

Under the Wills Act, a person of sound mind who is of age may dispose of their property by will. The law does not require you to provide for your children, treat them equally, or explain yourself. A will that leaves everything to one child, to a charity, to a friend or to a second spouse is, on its face, valid.

This is deliberate. The law’s position is that a person who built an estate should decide where it goes. Whether that is fair in a particular family is not something the law tries to answer in advance.

What the law does insist on is that the will is valid: properly executed and witnessed, made by someone with testamentary capacity, and free from undue influence. That is where most successful challenges actually come from, not from the unfairness of the outcome. If you are drafting a will that will disappoint someone, getting the formalities right is not a technicality; it is the whole battleground. Our guide to writing a will in Singapore covers the requirements.

The significant qualification: family provision

The Inheritance (Family Provision) Act is the main statutory limit on testamentary freedom in Singapore. It allows certain defined dependants to apply to the court for reasonable provision out of an estate where the will, or the intestacy rules, leave them without it.

The categories are defined and limited. They centre on dependants of the deceased, and in some circumstances a child falls within them. The Act is not a general licence for any disappointed adult child to reopen a will because they think they should have received more. An independent, working adult child is in a very different position from a dependent one.

Because the scope is narrow and fact-sensitive, this page will not attempt to tell you whether it applies to your family. Two practical points are worth making:

  • If you are making a will that leaves a child out, ask your lawyer directly whether family provision is a realistic risk in your circumstances. It is a specific question with a specific answer, and it is much cheaper asked now than litigated later.
  • If you are a child who has been left out and you were financially dependent on the deceased, take advice quickly. Applications of this kind are subject to time limits, and estates get distributed.

Family provision is one route by which a will can be attacked; there are others, including capacity and undue influence. Those are dealt with in contesting a will in Singapore.

Intestacy is a completely different rule

Here is the point people most often get wrong. Testamentary freedom operates only where there is a valid will. If you die without one, the Intestate Succession Act takes over, and it gives children fixed shares.

The shares depend on who survives you: whether there is a spouse, whether there are parents, and how many children there are. What matters for present purposes is the principle: the intestacy rules do not care about your intentions. Every child in the defined class takes their share, including the child you had not spoken to in twenty years and the child from a relationship nobody in the family knows about.

So “doing nothing” does not disinherit anyone. It does the opposite. If you actively want a particular child excluded, the only way to achieve it is a valid will that says so. The distribution mechanics on an intestacy, and the process for administering such an estate, are set out in applying for letters of administration and the Intestate Succession Act.

Muslim estates: faraid applies

For Muslims in Singapore, the position is fundamentally different and testamentary freedom is limited.

Under faraid, the estate is distributed among defined heirs in fixed proportions determined by the relationship to the deceased and by who else survives. Children are heirs. A Muslim testator generally cannot use a will to redirect the whole estate away from the heirs. Only a limited portion may be disposed of by will, and a gift by will to someone who is already an heir carries its own requirements, typically involving the consent of the other heirs.

The practical result is that a Muslim parent in Singapore cannot simply disinherit a child by making a will. There are legitimate lifetime planning tools available within the framework (inter vivos gifts, nuzriah, hibah and trusts), but they need proper advice and are outside the scope of a general page. See Muslim inheritance and faraid, and confirm the position for your family with the Syariah Court or MUIS rather than relying on a general guide.

Who counts as your child

Before you can decide who to leave out, you need to be clear about who the law regards as your child in the first place. Three situations come up regularly.

Adopted children

An adoption order makes the child your child for legal purposes, with the same standing as a biological child, and generally severs the legal relationship with the birth parents. An adopted child inherits from the adoptive parents on an intestacy and is treated as a child for the purposes of a will that refers to “my children”. This cuts both ways. A child you gave up for adoption is generally no longer your child in law. See the effects of an adoption order.

Stepchildren

A stepchild has no inheritance rights at all unless adopted. Marrying their parent does not make them your child in law, however long you have raised them. If you want a stepchild to inherit, you must name them in your will, or complete a stepchild adoption. This is one of the most frequent and most avoidable estate planning failures in blended families.

Children born outside marriage

Their position depends on the circumstances, including whether paternity has been established. Where you know or suspect there may be such a child, deal with it in the will explicitly rather than leaving it to be worked out after your death. See children born outside marriage in Singapore.

If you genuinely intend to leave a child out

Assume the decision will be tested. People who are cut out of a will frequently do something about it, and the estate pays for the fight either way. A few things materially improve the odds that your wishes hold:

  • Say it clearly in the will. Silence looks like an oversight. An express statement that you have considered the person and deliberately made no provision for them removes the argument that you simply forgot, or that you did not know they existed.
  • Do not put the reasons in the will itself. A will becomes a public document once probate is granted. A paragraph explaining your grievances becomes permanently readable by anyone. A separate letter of wishes, kept with the will, does the explanatory work privately.
  • Write the letter of wishes carefully. It should be measured and factual. An angry letter can be evidence against you, particularly on the question of whether you were of sound mind or acting under someone else’s influence.
  • Protect the capacity evidence. If there is any question about your health or age, have the will professionally drafted and consider a contemporaneous record that capacity was assessed.
  • Watch for undue influence allegations. If the main beneficiary is the child you live with and who arranged the lawyer, expect that to be raised. Independent legal advice, given to you alone, is the standard answer.
  • Review after every family change. Marriage generally revokes a will. Divorce, remarriage, a new child or a reconciliation all change the picture.

These issues are sharpest in second marriages, where a testator is trying to provide for a current spouse without disinheriting children from a first marriage. That specific problem, and the structures used to solve it, is covered in estate planning for blended families.

Consider whether disinheriting is what you actually want

Sometimes the underlying goal is not exclusion but control: you do not want a lump sum going to a child with an addiction, or to one whose spouse you distrust, or to one who cannot manage money. A total exclusion is a blunt instrument for that, and it invites a challenge.

Alternatives worth discussing with a lawyer include leaving a share in trust rather than outright, a smaller but express gift that makes clear the child was considered, or lifetime gifts that achieve the practical result without leaving anything to argue about in the estate. The broader options are outlined across our wills and probate guide. If you want advice on your own situation, we can connect you with a licensed Singapore law practice through our contact page.