A trust has long been the darling of every affluent South African family. A sign that you have accumulated sufficient wealth to preserve for the generations to follow. However, the prestige has waned over the last couple of decades for the following reasons:
- Considerable change in family dynamics. It is now common for a family of four to be split across different countries.
- The investment options available to South African investors have increased dramatically. Offshore investments in a unit trust, shares and even physical property have become the norm. All these asset classes are out of reach for a South African trust.
- Legislative changes have reduced the tax benefits of trusts.
Due to the historic popularity of trusts, various individuals or families have trusts containing considerable capital gains, thus the only route to alternative investment options involves triggering capital gains.
For example, suppose the trust invested in shares listed on the JSE (as various trusts have done in the past) in March 2002. A R300 000 investment, split evenly across SA stalwarts Sasol, Nedbank and Shoprite would’ve grown to roughly R4 million today (a return of 13.83%). In order to bank those profits and deploy capital elsewhere, the trust will cough up R1 332 238 in capital gains tax.
| Share price: March 2002 | Number of shares purchased | Share price: Feb 2022 | Value Feb 2022 | |
| Sasol | R114.20 | 876 | R328.70 | R287 828 |
| Nedbank | R129.20 | 774 | R213.56 | R165 294 |
| Shoprite | R6.50 | 15 385 | R230.59 | R3 547 538 |
| R300 000 | R4 000 661 |
Source Table 1: Brenthurst Wealth
The conduit principle allows for trust income and capital gains to flow through to the beneficiaries and be taxed in their individual capacity. At first glance, this seems sufficient to neutralise the tax inefficiencies of a trust, as individuals have a 40% inclusion rate vs the 80% inclusion rate of a trust. Ultimately, the objective of a trust is to preserve wealth for future generations by protecting it against capital gains tax and estate duty. Distributing all income and gains to beneficiaries proves counter-intuitive when keeping the objective of intergenerational wealth in mind:
- Family trusts would rather keep capital within the trust’s name to build long-term growth, where it could be under the supervision of the trustees and not in the hands of individual beneficiaries.
- Considering the profiles of individuals with large family trusts, distributing earnings to individual beneficiaries is likely to push up their marginal tax rates, nullifying some of the tax savings made through the implementation of the conduit principle as these individuals are already in high tax brackets.
- By removing capital from the trust and placing it in the name of individual beneficiaries, the capital is once again exposed to estate duty.
Solution: Sinking fund
The ideal product for a trust to invest in is called a sinking fund. A sinking fund is similar to an endowment policy, except a sinking fund does not require life assureds. This means the investment can continue in perpetuity without advisors and trustees having to re-appoint new life assureds (endowment policies are realised if the last life assured passes away).
Tax is levied within the sinking fund, meaning earnings are not taxed in the name of the trust. Within a sinking fund, income is taxed at a flat rate of 30% and capital gains at a flat rate of 12%. Keeping in mind that large family trusts are generally a tool for the wealthy, the following comparisons can be drawn.
| Entity | Tax rate | |
| Income | Capital gains | |
| Individual (45% tax bracket) | 45% | 18% |
| Trust | 45% | 36% |
| Sinking fund | 30% | 12% |
Source Table 2: Sars, Brenthurst Wealth
The beneficial tax rates make a huge difference when measured over a long time period, which is the investment horizon of a typical trust. For example, we assume a trust invests R1 million in the Ninety One Equity Fund in 2000 and fully disposes of the investment every five years to show the effects of CGT. The below graph illustrates the difference in outcomes between a normal discretionary investment in the trust’s name and a sinking fund investment in the trust’s name. The tax benefits of the sinking funds lead to a difference of R4 691 083 after 20 years.
South African trusts are prohibited from making direct offshore investments. A significant drawback for the wealthier segment of society, who generally desire to use the diversification that offshore investments provide. Although not directly offshore in another jurisdiction, a sinking fund does allow for offshore allocation within the underlying investments. This means the trust can gain exposure to offshore growth assets and exchange rate movements – useful tools to have when trying to build long-term wealth.
Although the first prize would be to externalise assets directly in an offshore jurisdiction, many wealthy families have deep roots in South Africa and have significant enterprises operating within the country with no imminent plans to emigrate. For these individuals, a sinking fund is especially attractive.
It is advisable to engage with an experienced, qualified financial advisor to structure investment strategies suited to the investors’ specific circumstances and financial goals.




Megan joined the Brenthurst Wealth team in March 2026 as an Administrative and Fiduciary Services Assistant at our Val de Vie Office in the Western Cape. Prior to joining Brenthurst, Megan gained three years of experience in the retail sector, where she developed management and client service skills.




I obtained my National Diploma in Financial Information Systems from the Cape Peninsula University of Technology in 1999 and have worked in the wealth management industry since January 2000. Over the years, I have gained extensive experience in various roles, including Portfolio Manager Assistant, Planner Assistant, and Paraplanner.
Esmarelda Isaacs-Andreas joined the Brenthurst Wealth Stellenbosch office in October 2025, taking on the dual role of Receptionist and Fiduciary Administrator.
I obtained my National Diploma in Financial Information Systems from the Cape Peninsula University of Technology in 1999 and have worked in the wealth management industry since January 2000. Over the years, I have gained extensive experience in various roles, including Portfolio Manager Assistant, Planner Assistant, and Paraplanner.
Ashley joined Brenthurst Wealth in January 2025 as Office Administrative Assistant and Receptionist for the Stellenbosch Office.




René Heystek joined Brenthurst Wealth in November 2023, as receptionist and administrative assistant in the newly established George/Garden Route office.
Michelle Heystek has built a career in the financial services over the last two decades, after obtaining her B.Com degree in Financial Management in 2005. Once she joined Brenthurst in 2006, she continued her academic journey, obtaining her Certificate in Wealth Management from INSETA in 2007, followed by a Postgraduate Diploma in Financial Planning from the University of the Free State. In 2008, she earned the Certified Financial Planner (CFP®) designation.





Anelle joined Brenthurst Wealth as a Receptionist and Administrative Assistant to Brian Butchart in the Cape Town office in December 2023. She has a wealth of knowledge from working as a liaison between Financial Advisers and clients at TMA and Absa Investment Management Services (Aims) since 1998. She obtained her B. com degree from the University of Port Elizabeth in 1997.











ADMITTED ATTORNEY | FINANCIAL PLANNER & HEAD OF BRENTHURST FOURWAYS

Sanet was appointed in April 2020, joining our Cape Town team as an Executive Administration Assistant to Renee Eagar. She has been in the financial services industry since 1990. Her previous experience includes positions at Sanlam, BJM and ABSA. She spent her last 12 years working at Alexander Forbes Private Client Wealth as a Senior Wealth Management Assistant. She has received numerous accolades over the years which include but not limited to, Alexander Forbes Client Service Excellence – Silver award in 2014,2015 and 2017. Sanet has also obtained her Certificate in Wealth Management (NQF 5) in 2012 and achieved “Best Student of the Year” from Moonstone.













Maria Smit is a Certified Financial Planner® with over 10 years of experience in the financial planning industry.


























