What Is the Difference Between a Unit Trust and an ETF?

1. The core structural difference

The fundamental structural difference is trading mechanism: ETFs trade throughout the day on the JSE at continuously updating market prices, exactly like an individual share, meaning the price you pay can change from minute to minute during trading hours.

Unit trusts, by contrast, are priced and traded just once per day at a single calculated net asset value, regardless of when during the day you actually place your buy or sell order, your transaction executes at that day's single NAV price, not at whatever the underlying holdings happened to be worth at your specific moment of ordering.

2. How fees typically compare

ETFs generally carry lower average total expense ratios, since most track an index passively with minimal active management overhead involved. This structural simplicity typically translates into meaningfully lower ongoing costs for investors compared to actively managed alternatives.

Unit trusts can range considerably, from low-cost index-tracking versions with fees approaching ETF levels, to considerably more expensive actively managed funds where a fund manager makes ongoing investment decisions. This means the fee comparison genuinely depends on the SPECIFIC unit trust and ETF being compared, not a fixed, universal rule favouring one structure over the other.

3. How you actually access each one

You need a brokerage or trading platform account to buy and sell ETFs, since they trade on the JSE exactly like shares do, requiring the same kind of account infrastructure. Unit trusts can typically be purchased directly through the asset management company itself, or via various investment platforms, without necessarily needing a full brokerage account specifically for this purpose.

This distinction matters practically if you don't already have a trading account set up, unit trusts can sometimes offer a simpler initial access path for investors starting from scratch, though this gap has narrowed considerably as investment platforms have simplified ETF access too.

4. Setting up recurring monthly investment

Both support recurring monthly debit order investing, though unit trusts have traditionally been more strongly associated with this straightforward approach, given their single daily pricing naturally simplifies setting up consistent, automated monthly purchases without worrying about intraday price timing.

Many South African platforms now also offer automated recurring ETF purchase options, narrowing this historical convenience gap considerably, worth checking your specific platform's capabilities directly if consistent monthly investing, regardless of structure, is your priority.

5. Tax treatment for South African investors

Both unit trusts and ETFs can be held within a Tax-Free Savings Account for the same tax benefits, and outside a TFSA, the underlying tax treatment for dividends and capital gains is broadly similar for equivalent underlying holdings between the two structures.

ETFs can have a slight structural tax efficiency edge in some international markets due to their specific creation and redemption mechanism, though this generally matters less within typical South African retail investor holding patterns, where most investors simply buy and hold rather than actively trading around this specific structural nuance.

6. Which suits your specific situation

Neither is universally better, low-cost, broadly diversified ETFs tracking major indices are often recommended as a simple, transparent, low-cost starting point for many investors, particularly those wanting straightforward, predictable market exposure without needing to evaluate active management decisions.

Unit trusts offer more variety in actively managed, specialist, or balanced fund options that some investors may genuinely prefer, particularly if you specifically want a professional fund manager making ongoing allocation and selection decisions on your behalf, rather than passively tracking a fixed index regardless of market conditions.

Which one wins depends on the cost gap, and that gap has narrowed

The standard comparison says unit trusts are actively managed and expensive while ETFs are passive and cheap. That is still broadly true, but the picture has more nuance than it did.

The JSE has continued expanding its product range, including actively managed ETF listings, which puts active strategies inside an exchange-traded wrapper. That blurs the structural distinction: the wrapper no longer tells you whether the strategy is active, and the fee no longer follows automatically from the wrapper.

The comparison that survives is on cost and trading mechanics rather than on structure. An ETF trades on the exchange at a market price throughout the day, which means a spread and brokerage on each transaction. A unit trust transacts at the net asset value calculated once daily, with no spread but often with higher ongoing charges.

The rate environment makes the cost difference more material than it was. With the repo rate at 7.25% and money market instruments yielding accordingly, the return available without any equity risk has risen. A fund charging 1.5% a year is giving up a larger share of a realistic expected return than it was when cash paid very little.

For a South African investor the practical filter is the total investment charge, which includes costs the headline fee excludes, compared against what the strategy is actually doing. An index-tracking product of either structure should cost a fraction of a percent. Anything charging substantially more needs to justify it with something other than the wrapper it comes in.