ETFs vs Unit Trusts in South Africa: Which Is Better for Your Retirement Portfolio?

An ETF (exchange-traded fund) is an investment fund holding a basket of assets that trades on a stock exchange like a share. A unit trust is a pooled investment fund that prices once a day and is bought or sold directly through a fund manager or platform.

For most South African investors building a retirement portfolio, the honest answer is: you probably need both. ETFs suit cost-conscious, long-term investors who want index exposure with low fees. Unit trusts suit investors who want active management, broader access inside certain retirement wrappers, or a wider range of asset classes in a single vehicle. The real choice is not ETF versus unit trust. It’s which vehicle belongs in which part of your retirement structure.

What actually determines the answer are costs, the wrapper you’re investing through (retirement annuity, preservation fund, tax-free savings account, or discretionary account), your need for offshore exposure, and how you intend to draw an income in retirement. This article works through each of those factors systematically.

If you’re building a diversified retirement portfolio, understanding the distinction between these two vehicles is foundational. It also connects directly to Regulation 28 limits on retirement fund assets, which constrain what you can hold inside a retirement annuity or preservation fund.

How ETFs and Unit Trusts Actually Work

Each vehicle pools money from many investors into a single portfolio. But how you buy, sell, and price them differs materially. Getting this right matters because the trading structure affects your costs, your tax position, and your access to certain asset classes.

ETFs are listed on a stock exchange. In South Africa, JSE-listed ETFs trade continuously during market hours, just as a share in Naspers or Anglo American does. You buy and sell through a stockbroker or an online platform. The price moves throughout the day based on supply and demand. Most ETFs track an index: they hold the same securities in the same proportions as their benchmark, so there’s no active fund manager deciding which shares to buy. The result is low ongoing costs and transparent holdings.

Unit trusts (also called collective investment schemes) price once a day, at a net asset value calculated after the market closes. You place a buy or sell instruction with the fund manager or through a platform, and the transaction settles at the next pricing point. Unit trusts can be actively managed, with a fund manager selecting holdings based on research and judgement, or they can track an index passively. Either way, they don’t trade on an exchange.

Three common mistakes deserve correcting here. First, unit trusts are not shares. When you invest in a unit trust, you own units in a pooled fund, not direct equity in individual companies. Second, ETF, index fund, and mutual fund are not synonyms. An ETF is a trading structure. An index fund is an investment strategy. A mutual fund is broadly equivalent to a unit trust, but that term is mainly used in the United States. An ETF can be an index fund, but an index fund isn’t necessarily an ETF. Third, investment trusts are entirely separate: they’re closed-ended companies listed on an exchange with a fixed number of shares, which differs substantially from the open-ended structure of both ETFs and unit trusts.

For South African investors seeking currency diversification through ETFs, JSE-listed rand-denominated ETFs that hold foreign assets are a practical starting point. You need no offshore account or foreign exchange allowance.

The Real Cost Difference: TER, Transaction Costs, and Platform Fees

ETFs are typically cheaper than actively managed unit trusts. But the cost comparison has three layers, and collapsing them into a single number misleads you. Understanding all three tells you which vehicle is genuinely cheaper for your situation.

Layer 1: The total expense ratio (TER). This is the annual fee deducted from the fund before you see a return. Passively managed ETFs and index-tracking unit trusts typically have TERs well below 0.5% per year. Actively managed unit trusts often carry TERs between 0.8% and 1.5%, and some multi-asset funds run higher. The difference compounds significantly over time.

Layer 2: Transaction costs. Every time you buy or sell a JSE-listed ETF, you pay brokerage, securities transfer tax (where applicable), and possibly a platform fee. If you invest monthly through a salary debit order, that brokerage charge applies each time. A unit trust bought directly through the fund manager often has no transaction charge. For investors making regular monthly contributions, those transaction costs can partially or entirely offset the TER advantage of the ETF.

Layer 3: Platform administration fees. Most investors access both vehicles through a platform, and that platform charges its own annual fee, typically a percentage of assets under administration. This fee applies regardless of whether the underlying fund is an ETF or a unit trust.

To make this concrete: on R5 million invested, a TER difference of 0.5% per year is R25,000 annually. After ten years of compounding, that difference becomes material. But if the ETF route costs you an additional 0.3% in transaction costs because you invest monthly, the net saving narrows to R10,000 a year. That’s still meaningful but not as dramatic as the headline TER comparison suggests.

The practical takeaway is to add all three layers before concluding that one vehicle is cheaper. For lump sum investors who trade infrequently, the ETF cost advantage is usually clear. For investors making small monthly contributions, a low-cost index-tracking unit trust can sometimes be more economical.

Costs are one of the most reliable predictors of long-term outcomes, because unlike market returns, they’re known in advance. How compounding costs erode retirement savings over time explains the mathematics in detail.

ETFs vs Unit Trusts: Side-by-Side Comparison

The two vehicles differ across eight dimensions that matter for retirement investors. Here’s a direct comparison, followed by a guide to which profile suits each vehicle.

These tables show that neither vehicle dominates unconditionally. The better question is always: which vehicle, inside which wrapper, for which purpose?

Which Vehicle Fits Which Retirement Wrapper

Where each vehicle belongs in your retirement structure depends on which wrapper you’re using and what that wrapper allows. Each wrapper serves a different tax and legal purpose, and the vehicle choice inside it should support that purpose.

Retirement annuity (RA). An RA is a tax-advantaged structure governed by Regulation 28, which limits offshore exposure, equity weighting, and exposure to certain asset classes. Both ETFs and unit trusts are permissible inside an RA, but availability depends on your platform’s approved fund list. Most platforms offer a range of index-tracking unit trusts and, increasingly, JSE-listed ETFs. If your platform restricts you to unit trusts, a low-cost index-tracking unit trust achieves a similar outcome to an ETF at comparable cost. Check the fund list before assuming a specific vehicle is available. How a retirement annuity compares to a provident fund gives the broader structural context.

Tax-free savings account (TFSA). The TFSA allows both ETFs and unit trusts, and there’s no capital gains tax or dividends tax on returns within the wrapper. Because costs compound inside the TFSA over decades, the lower-TER ETF is often the better choice here for long-term growth. The annual contribution limit (R36,000 in 2026) and the lifetime limit apply regardless of vehicle.

Preservation fund. Like the RA, this is a Regulation 28 wrapper. The same logic applies: check the approved fund list, and favour low-cost options because you typically can’t add new contributions. The existing capital needs to work efficiently.

Discretionary investment account. This is an investment in your own name, outside any retirement wrapper. Here you have the most flexibility: any JSE-listed ETF, any unit trust, and using your offshore allowance to access foreign ETFs are all available. The tax treatment in a discretionary account is less favourable than inside a wrapper, so cost minimisation matters even more.

In retirement, choosing the right income structure involves deciding which wrapper to draw from first. That decision affects which vehicles you should hold where.

Shari’ah-compliant note. Both ETFs and unit trusts are available in Shari’ah-screened formats in South Africa. If this applies to you, ask your platform for Shari’ah-compliant fund options within each wrapper. The wrapper-first principle still applies: start with the correct tax structure, then select a compliant fund within it.

Accessing Offshore Exposure Through ETFs and Unit Trusts

Both vehicles give you offshore exposure. The route differs depending on whether you’re investing inside a retirement wrapper or in a discretionary account. The starting point is simpler than many investors expect.

Inside a retirement annuity or preservation fund, Regulation 28 limits offshore exposure to 45% of the portfolio. You access that offshore allocation through rand-denominated funds: either JSE-listed ETFs that hold foreign assets (such as ETFs tracking global equity indices) or unit trusts with an offshore mandate. No foreign exchange transaction is required, and no offshore account is needed. Your rand stays onshore, but the underlying exposure is to foreign assets.

In a discretionary account, you have two additional routes. The first is JSE-listed ETFs that hold foreign assets, which works the same way as inside a retirement wrapper. The second is using your annual offshore allowance (currently R1 million via the single discretionary allowance, or up to R10 million via a tax clearance) to invest directly in foreign-currency-denominated ETFs or unit trusts held offshore. Why currency diversification matters for South African investors explains why this matters for long-term portfolio resilience.

Some investors use currency diversification ETFs on the JSE as a practical first step, because they require no offshore infrastructure and trade in rand. Others, once comfortable with the process, move to direct offshore structures for greater flexibility and access to a wider range of funds.

On currency arbitrage strategies using foreign-listed ETFs: some investors do use such techniques, and a practical guide to investing offshore from South Africa covers the mechanics. These approaches involve real complexity and foreign exchange risk. For most retirement investors, the simpler route of rand-denominated offshore ETFs or unit trusts achieves meaningful diversification without that added complexity.

Tax Treatment: What Changes and What Stays the Same

The tax treatment of ETFs and unit trusts in South Africa is determined primarily by the wrapper you use, not by the vehicle itself. Choosing an ETF over a unit trust doesn’t, on its own, change your tax position.

Inside a retirement annuity or preservation fund, returns are free of capital gains tax and dividends tax while the money remains invested. This applies equally to ETFs and unit trusts held within those wrappers. When you eventually take income in retirement through a living or life annuity, that income is taxed as ordinary income under the standard income tax tables.

Inside a tax-free savings account, returns are entirely exempt from capital gains tax, dividends tax, and income tax. Again, this applies to both ETFs and unit trusts.

In a discretionary account (investments in your own name), the picture changes. Capital gains on ETFs and unit trusts are both subject to capital gains tax, with the annual exclusion applying. Dividends are subject to dividends tax at 20% (withheld by the fund). Interest income is taxed as ordinary income above the annual interest exemption. There’s no structural tax difference between an ETF and a unit trust in a discretionary account.

The practical implication is clear: the wrapper decision comes first. Putting a high-returning, low-cost ETF in a discretionary account when you have unused RA or TFSA capacity is likely a worse outcome than a slightly more expensive unit trust inside the correct wrapper. Tax efficiency at the wrapper level almost always outweighs cost differences at the vehicle level.

The two-pot retirement system adds a further dimension for those still accumulating: the pot structure applies at the wrapper level, not at the vehicle level, so the choice of ETF or unit trust doesn’t affect which pot your money falls into.

Using ETFs and Unit Trusts Together in One Portfolio

You can, and often should, use both vehicles simultaneously. The question is how to combine them without duplication or unintended concentration.

A practical starting framework assigns each vehicle to the job it does best:

• ETFs for core, low-cost index exposure in wrappers where they’re available and transaction costs aren’t prohibitive (typically inside a TFSA or discretionary account for lump sum investors).
• Active unit trusts for the portions of your portfolio where you want deliberate active management, specialist asset classes, or access to a fund manager with a clear and consistent strategy.
• Index-tracking unit trusts inside retirement wrappers where your platform doesn’t offer ETFs, or where regular monthly contributions make the transaction cost of ETFs inefficient.

The duplication risk is real. If your TFSA holds a JSE-listed ETF tracking the FTSE/JSE All Share Index, and your RA holds a multi-asset unit trust with 60% in South African equities, you may have more concentration in local large-cap shares than you intend. Why risk concentration is a hidden danger in retirement portfolios explores this in detail.

In retirement, the combination question also intersects with the sequence of decisions at retirement: specifically, which wrapper you draw from first and how the vehicle inside that wrapper affects liquidity. ETFs in a discretionary account can be liquidated quickly at market price. Unit trusts in a retirement wrapper require the fund to be switched or encashed, which takes a few business days but is straightforward.

If you’re using funds to generate income rather than growth, using dividend-paying funds to generate retirement income is worth reading alongside this article.

Frequently Asked Questions

How do exchange-traded funds compare structurally to unit trusts? An ETF trades on a stock exchange during market hours at a continuously changing price. A unit trust prices once a day and is transacted directly through the fund manager or platform. Both pool money from many investors into a single portfolio, but the mechanics of buying, selling, and pricing differ materially.

What non-technology exchange-traded funds are available for investment? JSE-listed ETFs cover a wide range of asset classes and geographies: South African equities, global equities, bonds, property, commodities such as gold, and multi-asset indices. Technology-heavy indices are one subset. There are equally large ETF categories tracking dividend-focused indices, emerging markets, fixed income, and broad global equity markets.

How do traded funds differ from mutual funds? A mutual fund (the US term) is broadly equivalent to a South African unit trust: it pools investor money, prices once daily, and is bought directly from the fund manager. An ETF is different because it trades on an exchange throughout the day at market prices. The key structural distinction is exchange listing and continuous trading versus daily pricing.

Are unit trusts equivalent to purchasing shares? No. Buying units in a unit trust gives you proportional ownership of a pooled portfolio managed by a fund manager. Buying shares gives you direct equity ownership in a specific company. Unit trusts are more diversified by nature, since a single unit typically represents exposure to dozens or hundreds of underlying assets.

How do exchange-traded funds, mutual funds, and investment trusts differ? These are three distinct structures. An ETF trades on an exchange, is typically passive, and is open-ended. A mutual fund (or unit trust) is also open-ended but prices once daily and doesn’t trade on an exchange. An investment trust is a closed-ended company listed on an exchange with a fixed number of shares; its market price can trade at a discount or premium to its underlying asset value. All three pool investor capital, but the legal and trading structures are meaningfully different.

Which performs better for long-term investing: index funds or exchange-traded funds? Index fund and ETF are not mutually exclusive categories. Many ETFs are index funds. The performance question is really passive (index-tracking) versus active management. Passively managed funds, whether structured as ETFs or unit trusts, consistently keep more of the market return for investors over long periods by virtue of lower costs. Timing the market versus time in the market is a related question worth addressing alongside this one.

What types of exchange-traded funds are most suitable for investment? For retirement investors, broad market ETFs with low TERs and high liquidity are generally the most suitable starting point: those tracking diversified equity indices, global equity indices, or multi-asset benchmarks. Narrow sector ETFs (single country, single sector, or leveraged ETFs) carry concentration and complexity risks that are usually inappropriate for retirement capital.

Is one safer to invest in: exchange-traded funds or mutual funds? Neither is inherently safer. Safety is determined by the underlying assets, not the vehicle structure. A unit trust holding volatile equities is no safer than an ETF holding the same equities. What matters is asset allocation, diversification, and the time horizon of the investment.

How do investors make money from exchange-traded funds? ETF investors earn returns in two ways: capital growth (the fund’s underlying assets increase in value, so the ETF price rises) and distributions (dividends or interest passed through from the underlying assets). Total return is the combination of both, minus fees.

What are exchange-traded funds fundamentally? An ETF is an open-ended investment fund that holds a basket of assets (shares, bonds, commodities, or a combination) and is listed on a stock exchange. Investors buy and sell units in that fund through a broker, just as they would buy and sell shares. Most ETFs are designed to track a specific index rather than outperform it.

How do exchange-traded funds differ from individual equities? Buying a single share gives you exposure to one company’s fortunes. Buying an ETF gives you exposure to every asset in the fund’s basket, which may be tens, hundreds, or thousands of securities. ETFs therefore provide built-in diversification that a single equity holding cannot, while still trading with the same ease as a share on the exchange.

The Decision That Actually Matters

The ETFs versus unit trusts debate is ultimately a vehicle question, not a destination question. Both can get you to the same place: a well-diversified, tax-efficient retirement portfolio. The wrapper you use, the costs you pay, and the drawdown structure you choose in retirement matter far more than whether the fund inside the wrapper is listed on the JSE or priced daily.

Start with the correct wrapper for each rand you invest. Then choose the lowest-cost vehicle that’s available and appropriate inside that wrapper. Review the combination periodically to check for duplication or unintended concentration.

For a fuller picture of how these decisions fit together, read a portfolio diversification strategy for retirement investors, or take a look at the preparing-for-retirement guide, which covers the sequence of decisions from accumulation through to income.

If you’d like to work through your specific structure, including which wrappers to prioritise, which vehicles to hold inside them, and how to sequence your retirement income, you’re welcome to arrange a private consultation at /contact.

This article is general information and not personal financial advice. Your specific circumstances will affect which approach is right for you.