Unit Trust vs Retirement Annuity

A retirement annuity and a unit trust aren’t really comparable on the same axis: a retirement annuity is a tax wrapper that can hold unit trusts inside it, rather than a separate investment. The comparison that matters is between money held inside the RA wrapper, mostly preserved until retirement and tax-deductible going in, and money held directly, flexible but taxed as it grows.

“Unit trust vs retirement annuity” sounds like a choice between two competing investments, and that framing is one source of the confusion. A unit trust is an investment: a pooled fund holding shares, bonds or a mix of assets. A retirement annuity is not a rival investment at all. It’s a tax wrapper, a legal structure that can hold unit trusts inside it. Ask a retirement annuity provider what the money is invested in, and the answer can be a selection of unit trusts.

So the real comparison isn’t unit trust versus retirement annuity. It’s unit trusts held directly, in your own name, versus the same kind of unit trusts held inside a retirement annuity wrapper. Once that’s the actual question, the differences stop being about which one “performs better” (the underlying investments can be identical) and become about tax, access, and what the wrapper allows you to hold.

Tax on the way in

A retirement annuity’s headline feature is that contributions are tax deductible, within limits set in tax law and published by SARS. The deduction is capped each year, with any excess carried forward, and the limits can change, so the current figures are worth checking rather than relying on a number read somewhere. A direct unit trust investment offers nothing equivalent. Money going in has already been taxed as income, exactly as it would be if it were spent or put under the mattress.

In shape, this part of the comparison is simple. One route gives a deduction against taxable income for the contribution, and the other doesn’t.

Tax while the money is invested

Inside a retirement annuity, growth isn’t taxed as it happens. No tax on interest, dividends or capital gains while the fund sits inside the wrapper. That’s the second main feature of the structure, and the longer the money stays invested, the more years of growth go untaxed.

Held directly, the same underlying unit trust doesn’t get that shelter. Interest earned is taxed in your hands, dividends are taxed (through dividends withholding tax, subject to exemptions), and capital gains are taxed when units are sold or switched, all in the ordinary way that applies to any South African taxpayer. None of this is unusual or a design flaw in the direct option. It is how investment income is taxed outside a wrapper.

Tax on the way out

The two paths are taxed differently on the way out, and how they compare depends on when and how the money is taken.

A retirement annuity lump sum is taxed under a separate retirement lump sum tax table, and any annuity income drawn afterwards is taxed as income. A direct unit trust holding is taxed differently on the way out: selling units can trigger capital gains tax on the growth, and the retirement lump sum table does not apply. Because the money going into a direct holding was taxed as income already, capital gains tax applies to the growth rather than to the whole amount.

Neither route is more or less taxing than the other in every scenario. The outcome depends on the size of the withdrawal, other income in that year, and rules intricate enough that the actual numbers are a question for a tax adviser before either route is assumed to be the more favourable one.

Access

Access is where the two differ in practice. Money in a direct unit trust is available whenever it is wanted. Sell some units, wait for settlement, and the money is there. There is generally no lock-in or minimum term, and no permission is required.

A retirement annuity is deliberately much more restrictive. Most of the money is preserved until the statutory minimum retirement age. Since the two-pot system began on 1 September 2024, new contributions are split in two: a savings component can be reached before retirement a limited number of times a year, with what you take taxed as income, while the retirement component stays preserved until retirement. Savings from before that date sit in a vested component under the old rules. Taking from the savings component also reduces what is left for retirement. How that applies depends on the particular fund and when the contributions were made. It is not the same as open access to the whole balance.

What you’re allowed to hold

A retirement annuity isn’t a free choice of any unit trust that exists. Retirement funds are subject to prudential investment limits, restrictions on how much can sit in particular asset classes and on offshore exposure. A direct unit trust holding isn’t subject to those retirement fund limits, so a lump sum could go into a single equity fund, or a fund with more offshore exposure than a retirement fund can hold, subject to the rules of the fund itself.

This is relevant to anyone considering a concentrated or heavily offshore portfolio, because the wrapper’s limits apply whatever the appetite for risk.

Estate and creditor treatment

In general terms, death benefits from a retirement fund are not simply part of the estate: the fund’s trustees have a discretion over who receives them, within the rules set by law, rather than the benefit passing automatically under a will. Retirement fund savings also generally sit outside the reach of creditors, because retirement funds are treated separately under South African law, though there are exceptions. A directly held unit trust is different on both counts: it forms part of the estate and is treated like any other asset for creditor purposes. These points are relevant to anyone doing estate planning or carrying personal liability exposure through a business.

Costs

Both routes can carry the same underlying fund fees, where the same type of unit trust is held. A retirement annuity can add its own layer on top: administration or wrapper fees for running the retirement fund structure itself. Whether the tax deduction and the shelter from tax on growth outweigh that layer depends on the individual case, so the fee comparison isn’t as simple as “same fund, same cost.”

Weighing the two

The balance depends on how the immediate tax deduction and long-term shelter are weighed against having money available whenever it is needed, and that can change at different points in life. Some people hold both, a retirement annuity for money earmarked for retirement and a direct unit trust for goals that need flexibility along the way. Treating it as a single either-or choice is one source of the confusion between the two.

How the two fit together depends on income, existing retirement provision, and what the money is meant to fund, which is why a general article only takes the question so far. An introductory call is a general-information conversation with no obligation, covering how the two work in general terms. The local investing page covers how these pieces fit into a broader onshore plan, and if the tax-free savings account is also in the mix, the article on tax-free savings accounts vs unit trusts covers that comparison separately.

Frequently asked questions

Is a retirement annuity better than a unit trust?

They’re not really comparable on the same axis, because a retirement annuity is a tax wrapper that can hold unit trusts inside it rather than a separate investment. The comparison that matters is between money held inside the RA wrapper (mostly preserved until retirement, tax-deductible going in, sheltered while invested) and money held directly (flexible, no deduction, taxed as it grows).

Can I invest in unit trusts through a retirement annuity?

Yes. The RA is the legal and tax structure, and the investments selected inside it can be unit trusts, subject to the prudential investment limits that apply to retirement funds specifically.

What happens to a retirement annuity if I need the money before retirement?

Most of the money in a retirement annuity is preserved until retirement. Since 1 September 2024 the two-pot system has split new contributions into a savings component, which can be accessed before retirement a limited number of times a year and is taxed as income, and a retirement component, which stays preserved until retirement. Money saved before that date sits in a vested component under the old rules. Taking from the savings component also reduces your retirement savings, so it is worth checking how this applies to your own fund before assuming money is accessible.

Unit Trust vs Retirement Annuity: What Is Actually Different?