If you leave an inheritance to a young child, who will make decisions about school fees, medical costs and the money that must last until adulthood? A properly drafted testamentary trust can create a practical structure for those decisions.
Its value lies in the terms of the will, the people appointed to carry them out and whether the inheritance can support the costs. A trust clause should be tailored to your family, rather than copied because someone else has one.
What is a testamentary trust?
A testamentary trust is created through a valid will and takes effect after the will-maker’s death. The will provides the trust instructions. It is different from an inter vivos trust, which is established during the founder’s lifetime. The timing of the trust’s creation does not itself determine its tax treatment. SARS: Types of Trust
The word testamentary refers to a will. The person making the will is the testator; the people or organisations intended to benefit are beneficiaries; trustees administer the trust in accordance with its terms and their duties.
How does it become operational?
There is a difference between the trust taking effect under the will and the trustees having authority and assets available to administer.
- The death and estate are reported and the will is dealt with through the estate process.
- The required trust documents are lodged with the Master. Nominated trustees must obtain the Master’s written authority before acting as trustees.
- The executor administers the estate, addresses debts, claims, costs and taxes, and arranges the assets allocated to the trust under the will.
- The authorised trustees manage the assets once available, maintain records and make properly documented decisions.
A clause in a will does not make cash available immediately after death. Ask how dependants’ essential expenses will be funded while the estate and trust arrangements are being put in place. Department of Justice: Administration of Trusts
What can the trust provide for?
Depending on carefully drafted powers and the available assets, a trust may be designed to help with education, accommodation, healthcare, maintenance and other beneficiary needs. The will can set out how income and capital may be used and when capital should ultimately be distributed.
For example, the instructions might permit support while a child is at school and studying, then provide for capital at a stated age or in stages. Ask the drafter how the trust should handle illness, interrupted studies, disability, changes in family circumstances and a beneficiary dying before final distribution.
A fixed age such as 25 is a planning choice, not a universal legal requirement. It must work with the purpose, wording, tax treatment and costs of the arrangement.
Guardian, executor and trustee are different roles
- A guardian has parental responsibilities relating to a child.
- An executor administers the deceased estate under the Master’s appointment.
- A trustee administers trust property under the trust instrument and the Master’s written authority.
One person or institution may perform more than one role where appropriate, but the roles should not be treated as interchangeable. A caring guardian may need to request funds from trustees and provide information to support the request.
Who should serve as trustees?
Consider experience, availability, impartiality, continuity, communication and willingness to keep proper records. Ask who will replace a trustee who dies, retires or cannot act. Discuss how decisions will be made, how conflicts will be managed, what reports beneficiaries or guardians will receive, and the complete fee basis.
There can be value in combining knowledge of the family with professional trust administration. However, a familiar name or a large institution is not a substitute for understanding the actual service, the appointed people and the terms. Request written information about fees, support processes and succession arrangements.
Does every testamentary trust pay individual tax rates?
No. An ordinary testamentary trust is generally taxed at the ordinary trust rate of 45% on taxable income taxed in the trust for 2026/27. Qualifying special trusts use individual tax bands, without the ordinary individual rebates. SARS: Trust income-tax rates for 2026/27
A special type-B trust must meet specific requirements: it is created under a deceased person’s will solely for qualifying relatives who were alive at the relevant time, and the youngest beneficiary must be under 18 at the end of the tax year. The technical definition includes particular cases such as children conceived but not yet born. Drafting and the actual beneficiary group matter. SARS: Guide to the Taxation of Special Trusts
If the youngest beneficiary turns 18 during a tax year, the type-B treatment generally ceases for that whole tax year, rather than only from the birthday. Keeping the trust running to age 25 does not keep type-B tax treatment running to age 25. A different special-trust category may apply where its own conditions are met.
CGT also needs attention. Both special types have a reduced CGT inclusion rate, but type B does not receive all the additional concessions available to type A. Do not assume that every special trust receives the same annual exclusion or main-home relief. SARS: Trust Frequently Asked Questions
These statements describe the trust’s own tax position. Who ultimately pays tax can also depend on vesting, the beneficiary’s tax residence and anti-avoidance rules. Obtain advice before deciding that a trust is “tax efficient”.
Does it remove estate duty?
No. Leaving assets to a testamentary trust does not by itself make the deceased’s estate exempt from estate duty. The estate calculation must still take account of relevant property, deemed property, deductions and abatements. Trust administration and the estate’s tax obligations are separate matters. SARS: Estate Duty
How does this relate to the Guardian’s Fund?
Where a minor’s cash inheritance has no effective legally permitted alternative arrangement, the Guardian’s Fund may be involved, subject to the law, the will and any court directions. This does not mean every asset automatically goes into the Fund, or that maintenance cannot be paid.
The practical comparison deserves its own discussion. Read the detailed GFS Guardian’s Fund versus testamentary trust article. The decision should compare oversight, access procedures, the child’s needs and the cost of a private trust.
What should your will drafter cover?
- Exactly which assets or share of the estate will fund the trust.
- Who the beneficiaries are and what happens if a beneficiary dies.
- Permitted maintenance, education and other payments.
- Trustee powers, appointment, replacement and remuneration.
- How income and capital may be used, invested and ultimately distributed.
- Whether different children have different needs.
- What happens if the inheritance is too small to administer economically.
- Tax classification, annual compliance and possible changes as beneficiaries age.
Do not overlook annual administration
Ask who will manage banking, accounts, resolutions, tax returns and applicable beneficial-ownership records and reporting. Obtain a cost estimate in rand, including a small-inheritance example. A sound plan must be affordable to run, as well as clearly drafted.
Testamentary and inter vivos trusts: a comparison
| Question | Testamentary trust | Inter vivos trust |
|---|---|---|
| When does it take effect? | After the will-maker’s death, under a valid will. | During the founder’s lifetime. |
| What sets its rules? | The trust provisions in the will. | A trust deed or agreement. |
| How is it funded? | Assets allocated under the will; actual funding follows estate administration. | A properly implemented donation, sale or other lawful transfer; registration alone does not move assets. |
| Who manages it? | Trustees authorised in writing by the Master. | Trustees authorised in writing by the Master. |
| Typical purpose | Managing an inheritance, often for minors or other beneficiaries needing ongoing support. | Ongoing family, business, succession or other defined planning during life and afterwards. |
| Income tax where the trust itself is taxed | Ordinary trusts: 45% for 2026/27. Qualifying special trusts use individual tax bands, without individual rebates. | The same ordinary-trust rate. A qualifying special type-A trust may receive different treatment. |
| Automatic tax saving? | No. Special type-B conditions must actually be met. | No. Funding, distributions, loan accounts and anti-avoidance rules matter. |
| Lifetime protection? | No trust administration during the will-maker’s life. | Can operate during life, but does not guarantee protection against creditors or divorce claims. |
| Ongoing administration? | Yes: records, trustee decisions, tax and applicable beneficial-ownership reporting. | Yes: records, trustee decisions, tax and applicable beneficial-ownership reporting. |
| Is it suitable for everyone? | No. Compare the inheritance, beneficiary needs and running costs. | No. Compare the purpose, assets, transfer costs, tax and running costs. |
The timing of creation and the tax classification are different questions. “Testamentary” does not automatically mean “special trust”.
Practical GFS resources
Use these optional educational resources to prepare questions and organise your information. They do not replace a professional recommendation or legal document.
- GFS Will Preparation Workbook – South Africa — R49.99: record beneficiaries, proposed trustees, support needs and questions for your professional will-drafting appointment; not a will or trust deed
- Complete Financial Affairs Organiser — R149.99: record where the will, trust documents, policies and professional contacts can be found
- Deceased Estate Administration Guide — R109.99: understand the estate steps that may take place before trust assets are available
- Capital Gains Tax Made Simple – 2026/27 — Free: learn the basic CGT terms before discussing the trust’s particular tax treatment
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General South African financial education, checked 2 November 2026. Your financial adviser should consider your personal circumstances, needs, goals and financial information, discuss the relevant benefits, costs, risks and restrictions with you, and recommend products only where they are suitable. Wills, trusts and estate arrangements also require advice from an appropriately qualified legal and tax professional. No return, tax saving or legal outcome is guaranteed.