RA vs TFSA in South Africa: which one first in 2026?

The rule that actually settles the debate

The RA versus TFSA question has a mathematically precise answer once you know one number: your marginal tax rate. If your marginal rate is 31% or higher — that means taxable income above R353,100 in the 2026/27 tax year — every rand you contribute to an RA saves you at least 31 cents in tax immediately. That immediate saving, reinvested in your RA, compounds over decades and is very difficult for the TFSA's tax-free growth to beat on a per-rand basis. Below 31%, the TFSA tends to win on a combination of flexibility, no forced annuity, and no Regulation 28 constraints.

The practical answer for most South Africans earning above R350,000 per year is not RA or TFSA — it is RA up to the deduction cap, then TFSA. The 27.5%/R350,000 RA deduction cap means the marginal benefit of additional RA contributions disappears once you hit it, at which point every subsequent rand goes into a TFSA.

How the RA deduction cap actually works

SARS allows you to deduct contributions to an RA up to the lesser of: 27.5% of the higher of remuneration and taxable income, or R350,000. For a salaried employee earning R600,000 per year, 27.5% is R165,000. That is the RA deduction cap for the year — you can contribute more, but the additional contributions do not reduce your current-year tax. They carry forward to future years, but that carryforward provision is a trap many investors walk into: you are effectively lending SARS-free capital to yourself in future, not saving now.

For an employee earning R1,350,000 per year, 27.5% would be R371,250 — but the cap is R350,000, so R350,000 is the maximum deductible contribution. At the 45% marginal rate, that deduction is worth R157,500 in immediate tax savings. That is the annual benefit of fully funding an RA for a high earner.

Where the TFSA wins despite the RA's tax advantage

The TFSA wins in five scenarios. First: you are in a low marginal bracket (below 31%) and the immediate deduction saving is small. Second: you expect to be in a higher bracket at retirement than now — the RA defers tax, so if your bracket goes up, you have deferred into a larger liability. Third: you plan to emigrate — post-2021 SARS rules require three years of tax non-residency before you can withdraw RA funds, whereas TFSA funds are accessible immediately. Fourth: you want access to the money before 55 — RA funds are locked until then; TFSA funds are not. Fifth: you want to invest in assets outside Regulation 28 limits (which cap equity exposure to 75% and international exposure to 45%) — the TFSA has no such constraints.

In practice, the TFSA annual limit of R36,000 (lifetime R500,000) is small enough that most people can afford to fund both. The optimal strategy is to maximise the RA deduction first, then top up the TFSA to R36,000 per year. The Tax Engine models this stacking and shows the marginal tax saving from each rand.

Section 13sex: the allowance most people miss entirely

If you own at least five new and unused residential units, Section 13sex of the Income Tax Act allows you to deduct 5% of their cost per year, straight-line, for 20 years. On R10 million of qualifying property, that is a R500,000 deduction against ordinary income — at the 45% marginal rate, worth R225,000 per year in tax savings. This is not a niche strategy; it is explicitly legislated and has been used by property investors to legally drop multiple tax brackets.

The practical barrier is the minimum five-unit threshold. A single townhouse does not qualify, but five units in a qualifying development can. Section 13sex stacks on top of RA deductions and TFSA contributions — it is not an either/or choice. The Tax Engine models all three simultaneously.

A worked example at three salary levels

At R250,000 annual income (marginal rate 26%): the RA deduction saves 26 cents per rand contributed. TFSA flexibility and access are worth more unless you are close to the 31% bracket. Priority: TFSA first, then RA. At R500,000 (marginal rate 36%): RA deduction saves 36 cents per rand up to R137,500 deduction cap. That is R49,500 in immediate savings. Priority: max RA deduction, then TFSA. At R1,000,000 (marginal rate 41%): RA saves 41 cents per rand up to R275,000 deduction cap. Priority: max RA, then TFSA, then investigate Section 13sex if you own or plan to own residential property.