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Testamentary trusts for minor children: who controls the money if both parents die?

A guardian nomination says who raises your children; it does not say who controls their inheritance. A testamentary trust sets the trustees, the rules and the ages, keeping the money out of a default process.

Last reviewed on
16 September 2026

A testamentary trust for minor children addresses a key issue that a guardian nomination does not. It specifies who will manage the children's inheritance, under what rules, and until what age if both parents die.

What happens to minor children's inheritance without a plan | Without a plan

If the will does not give clear instructions, a minor's inheritance may be paid into the Guardian's Fund or managed by the Master of the High Court. The caregiver is not always the person who controls the inheritance. Guardianship, trusteeship, and ownership of the money are separate decisions.

How the Guardian's Fund works | The Guardian's Fund

The Master of the High Court manages the Guardian's Fund to protect money for minors and others who cannot manage their own affairs. Guardians can apply for payments to cover education, clothing, medical care, and accommodation. Applications must include the required information. The fund is a legal safeguard, but it does not allow parents to choose how the money is invested, who manages it, or how it is distributed.

The testamentary trust answer | The answer

A well-drafted will with a testamentary trust lets parents choose trustees, set clear distribution rules, and keep the children's inheritance out of a default process. The trust should work with the guardian nomination, life insurance, beneficiary nominations, and the practical budget for raising the children.

How a testamentary trust for minor children works | How it works

A testamentary trust, or mortis causa trust, is created in the will and only comes into effect after death. The will can direct assets or policy proceeds to the trust and set the age or milestones for when the children receive capital. A discretionary trust gives trustees flexibility to meet changing needs. It suits families who want trustees able to respond as circumstances change, such as one child needing more support for education or medical costs than another, without being locked into fixed shares set out years in advance. A bewind trust gives ownership to the children, but trustees manage the assets. It suits families who want each child's entitlement fixed and transparent from the outset, since their share of the trust assets is defined even as trustees manage and invest it on their behalf until the stipulated age. The right structure depends on the family's goals. A qualified legal or fiduciary expert should draft it.

An inter vivos trust, or living trust, is set up while the founder is alive. It comes with ongoing tax, governance, and reporting work. If funded by a low-interest or interest-free loan, Section 7C tax can apply. For parents worried about both dying while children are still minors, a testamentary trust is usually more focused.

The choice of trustees matters as much as the trust wording. One trustee should know the children and family values. Another should bring fiduciary, investment, or administrative experience. The will should cover replacement trustees, decision-making, trustee fees, and conflicts of interest.

A practical testamentary trust example | An example

A couple with two children under ten had wills naming guardians, but no plan for managing the inheritance. They added a testamentary trust. They named a family member and their adviser as co-trustees. The will set clear rules for school fees, medical cover, and a discretionary allowance for the guardian's household costs. For the first time, their plan matched their real intentions.

Review your estate plan

Check if your current wills create a testamentary trust, name the right trustees, and set out how money can be used for the children. A guardian nomination alone does not cover these points.

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Du Toit van den Bergh, CFP®
Director, Victus Group
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Johann Joubert, CFP®
Director, Victus Group
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