For most South Africans investing for the long term, a low-cost, diversified ETF is a sensible starting point because it can offer broad market exposure at a relatively low ongoing cost. But unit trusts can suit you better if you want an actively managed fund, prefer automatic monthly debit orders, or value advice and a simpler way to invest. The right choice depends on the fund, platform and your habits, not the label.

Both are pooled investments: your money joins that of other investors to buy a portfolio of assets. A unit trust is priced by its manager, usually once each business day; an ETF trades on the JSE during market hours. Below, the differences that affect your costs and choices are set out, including an example of how a small fee gap can build over time.

How do unit trusts and ETFs differ?

A unit trust is a fund that issues units to investors, while an exchange-traded fund, or ETF, is a fund whose shares trade on a stock exchange. Both can hold shares, bonds or other assets, and both can be diversified. Neither structure tells you whether a fund is low-risk, high-risk or well suited to your goals.

When you buy a unit trust through a provider, your transaction is generally processed at the fund’s next calculated price, based on its net asset value. An ETF has a live market price on the JSE, which can move during the trading day and may differ slightly from the value of its underlying holdings. That difference is called a premium or discount.

Fund strategy matters as much as structure. Many ETFs track an index, such as a share-market index, aiming to follow its performance before fees. Some unit trusts are actively managed, with a manager selecting investments in an attempt to beat a benchmark. But index-tracking unit trusts exist, and ETFs can follow different strategies, so check the fund’s mandate rather than assuming.

In South Africa, you can access both through investment platforms and providers. Examples include unit trust ranges from Allan Gray and Ninety One, and JSE-listed ETFs from providers such as Satrix and Sygnia. These names are examples, not endorsements. Check the fund’s factsheet and the provider’s own information for its current holdings, objective and charges.

Which costs should you compare?

Compare the full cost of owning a specific fund through a specific platform. A low advertised management fee does not necessarily mean the lowest total cost, and the same fund can cost different amounts to hold on different platforms.

Start with the fund’s total expense ratio, or TER, which reports fund operating expenses over a past period as a share of assets. Also check transaction costs, any performance fee, the platform or administration charge, and advice fees if applicable. TER and transaction costs are backward-looking measures, not a promise of what future costs will be.

With an ETF, buying and selling may add brokerage, exchange-related charges and the bid-offer spread, the gap between the price buyers offer and sellers ask. Some platforms charge a monthly account fee or have minimum trades. Unit trust platforms may charge platform or administration fees, and a fund may have an initial fee. Fee schedules change, so confirm figures on the provider’s own page at the time you invest.

Say you invest R2,000 a month for 20 years and the investments earn the same average return before fees. If one option’s total annual costs were 0.5 percentage points higher than the other, the lower-cost option could finish with roughly R30,000 to R40,000 more, depending on return assumptions and how charges are applied. This is an illustration, not a forecast: returns vary, and the exact gap depends on the fees and performance.

Small monthly ETF purchases can make fixed brokerage charges a larger share of each contribution. If you invest R500 at a time, a minimum trade charge and spread can matter more than they would on a R5,000 trade. A unit trust debit order with no per-purchase brokerage may be cheaper for that pattern, even if its ongoing fund fee is higher.

How do tax and access work in South Africa?

Outside a tax-free savings account, investment returns can have tax consequences in either structure. Depending on the fund and what it distributes, you may receive interest or dividends, and selling an investment at a profit can create a capital gains tax event. The tax treatment depends on your circumstances and the investment, not simply on whether it is an ETF or unit trust.

Tax-free savings accounts can hold qualifying investments, including eligible collective investment scheme products. Contributions count towards limits set by government, and withdrawals do not restore contribution room. Limits and qualifying product rules can change, so check the current guidance from SARS on tax-free investments before choosing an account or making a contribution.

A TFSA does not make every investment risk-free or turn a high-fee fund into a low-cost one. Compare the account provider’s charges and the underlying fund’s costs. Also avoid withdrawing and replacing money casually: the contribution rules can make that costly, even when the cash stays within your household.

For an ETF, you generally need access to a brokerage or investment platform that lets you place a JSE trade. You choose when to place the order and its price limit, where the platform offers that option. A unit trust is commonly bought through a fund manager or platform, often with a debit order, and the transaction is processed at the next applicable fund price.

Both can be easy to sell, but ease of trading is not the same as a good reason to sell. An ETF’s market price can fluctuate through the day, and a thinly traded fund can have a wider spread. A unit trust’s daily pricing means you do not see an intraday trading price, but your sale is still subject to processing times and settlement arrangements. Confirm those details with the provider.

Which one should you choose?

Choose a diversified, low-cost ETF if you are comfortable using a platform, can invest in sensible-sized trades and want to track a market index. It is often a good fit for a hands-on investor who can leave the investment alone and check total costs before buying.

Choose a unit trust if its specific fund offers the strategy you want, if regular debit orders suit your cash flow, or if you receive valuable advice through the service. A unit trust is not automatically more expensive or less effective. Compare the fund’s results with an appropriate benchmark over a meaningful period, after fees, while remembering that past performance cannot predict future returns.

If you want active management, compare active unit trusts with each other and with relevant passive alternatives. Ask what the manager is trying to achieve, how the fund differs from its benchmark, and what you pay for that approach. A higher fee needs a clear rationale; the fact that a manager aims to beat the market does not mean they will.

If you are choosing between two funds that hold similar assets, compare their total costs, diversification, tracking or management approach, and the platform charges for your planned contribution size. A cheaper fund that is difficult for you to keep funding may not work as well in practice as an affordable debit order you can maintain.

Common mistakes that can cost you

The first common mistake is comparing a fund’s TER alone. Check transaction costs and platform charges too, then include ETF brokerage and the spread for the amount you actually expect to invest. Use the latest fund factsheet and the platform’s fee schedule, rather than relying on an old comparison or a headline fee.

Another mistake is buying several funds that appear different but hold many of the same large companies. A local equity ETF, a broad global equity ETF and an actively managed fund can overlap in ways that leave you less diversified than you expect. Review each fund’s holdings and geographic exposure before adding another.

Do not confuse a low share price with a cheap investment. The price of one ETF unit does not tell you whether the fund is good value; costs, holdings and fit with your plan matter more. Nor does a rising recent performance chart show what returns you can expect next.

Finally, avoid choosing an ETF solely because it trades during the day. Frequent buying and selling can add costs and encourage decisions based on short-term price moves. If you need to use the money within a few years, the bigger question may be whether a share-heavy investment suits your time horizon at all, since markets can fall when you need to sell.

What to check before investing

Before committing money, read the fund factsheet for its objective, benchmark, holdings, risk profile and latest cost figures. Check whether it is available through your chosen South African platform, what a monthly debit order or trade costs, and how quickly you can access the proceeds after selling. The JSE provides information about listed products and trading through its ETF and market resources.

For a first long-term investment, start by comparing one diversified, low-cost index option in each structure, if suitable choices are available. Calculate the costs using your real monthly amount, then pick the option you can fund consistently without taking on risk you cannot accept. This is general information, not personal financial or tax advice; a licensed financial services provider or tax practitioner can advise on your situation.