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Old brass leveller

23 Jun 2026

The hidden lever in investing – why tax efficiency and legacy planning matter

Azwinndini Manenzhe

Azwinndini Manenzhe | Cross-border tax and fiduciary adviser, Investec

Adelle du Plessis

Adelle du Plessis | Cross-border tax and fiduciary adviser, Investec

Even the best investment returns can be eroded if your investments aren’t structured properly from a tax and legacy planning perspective.

When we look at our investments, we tend to focus on the return number at the end of our portfolio statement, compared against a suitable benchmark. But investment returns are only part of the story. How those returns are structured ultimately determines how much wealth you preserve over time.

In this article, we look at how an effective structure combines ownership vehicles, funding mechanisms and tax planning to optimise when gains are realised, reduce unnecessary tax leakage and support smooth intergenerational wealth transfer.

 

Moving beyond gross returns

A portfolio delivering strong gross returns can still underperform if you don’t consider tax efficiency and legacy planning. South African investors face multiple layers of taxation: income tax (up to 45%), capital gains tax (effective rates up to 18% for individuals and up to 36% for certain trusts), dividends tax (20%, with offshore variations), and estate duty (20%/25%), alongside estate administration costs and liquidity constraints at death.

While manageable individually, these taxes compound over time, creating a structural drag on wealth that is often underestimated.

 

  • 1. Personal capacity – control with exposure

    Investing in your personal capacity offers simplicity, transparency and full control, with minimal administrative barriers. It is often well-suited to early-stage wealth accumulation.

    However, this comes with full tax exposure: income taxed at marginal rates (up to 45%), capital gains taxed at 18%, and dividends taxed at 20%. Assets also form part of the dutiable estate, potentially creating estate duty and liquidity pressures at death. Foreign investments may further introduce situs tax exposure.

    Tax-efficient options include tax-free investments (which should be maximised annually), roll-up unit trusts (deferring tax until disposal), structured products and wrappers such as endowments or sinking fund policies, which can reduce effective tax rates and provide protection against foreign situs taxes.

  • 2. South African trusts – some flexibility with complexity

    South African trusts introduce separation between individuals and assets, supporting estate planning, asset protection and controlled intergenerational transfers. This flexibility can be valuable as family dynamics evolve.

    However, trusts are taxed at higher rates unless the conduit principle is applied, allowing income and gains to be taxed in the hands of South African resident beneficiaries, although this increases their estate duty exposure. Retaining profits within the trust mitigates estate duty exposure but results in higher annual taxation. You should also watch out for funding costs.

    Trusts also involve administrative complexity and ongoing governance. From an exchange control perspective, they cannot directly hold foreign assets and typically require asset swap structures to gain offshore exposure. Investment wrappers can help reduce the need for annual distributions where beneficiaries are individuals.

  • 3. Offshore trusts – tax efficiency with trade-offs

    Offshore trusts are commonly used for diversification, currency management and long-term wealth planning. They can provide access to jurisdictions with tax efficiencies or deferral opportunities within the structure and offer the potential for smoother long-term compounding in selected environments, as well as estate-planning advantages when funded and administered in specific ways. If the funding of an offshore trust is structured correctly, it can be tax efficient from a South African perspective, with South African tax triggered only upon distribution to South African-resident beneficiaries. Offshore trusts also protect from most foreign situs taxes, though with notable exceptions, such as the UK and France.

    However, these benefits come with trade-offs: higher setup and administration costs, increased regulatory and reporting requirements, exposure to foreign tax regimes and reduced direct control over assets. The funding mechanism used for the offshore trust is an important consideration and requires specialist advice.

    Unlike local trusts, offshore trusts generally do not face exchange control investment restrictions unless they invest back into South Africa. They are typically appropriate for larger, more complex estates and longer-term planning objectives.

Effective structuring: an integrated approach

There is no single correct structure. The optimal approach depends on the nature of the underlying assets (income vs. capital growth), the investor’s tax profile, time horizon, family dynamics and succession objectives.

Effective structuring is about aligning these elements into a coherent framework that balances tax efficiency, control and flexibility, while remaining adaptable as circumstances evolve.

 

Final perspective

As your wealth grows, your focus shifts from accumulation to preservation, protection and efficient transfer. Over longer time horizons, structural inefficiencies can erode wealth as much as poor investment performance.

Meaningful improvements often come not from chasing higher returns but from refining the structure to ensure that wealth is preserved, efficiently transferred, and capable of supporting future generations.

More tax insights from Investec Focus

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