The income level at which you start paying tax, for each age group.
Tax threshold
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Rebate for your age
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Rebate / 18% check
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Why a tax threshold exists at all
South Africa does not have a separate tax-free allowance the way some countries do. Instead it gives every taxpayer a rebate, a flat amount subtracted from the tax you would otherwise owe. The tax threshold is simply the income at which that rebate has run out: below it, the rebate wipes your entire bill to zero, so nothing is payable. This calculator works out that breakeven point for your age band and shows the arithmetic behind it, which is more useful than memorising a number that changes most years.
The structure is stable even when the figures move. Everyone gets a primary rebate. Reach 65 and you pick up a second rebate on top. Reach 75 and a third is added. Because older taxpayers carry larger rebates, more of their income is sheltered, so their thresholds sit higher. That tiering is deliberate policy, and it is the part worth understanding.
The rebate divided by 18 percent trick
Here is the neat relationship the tool verifies. The lowest income-tax band charges 18 percent. Below the threshold, all your income falls inside that first band, so the tax is just 18 percent of your taxable income. Set that equal to your rebate and solve, and the threshold is exactly your rebate divided by 0.18. This is why the threshold and the rebate are not two independent numbers; one defines the other. The rate this calculator applies for the first band is 18 percent, and you should confirm the latest rebate amounts with SARS.
Checking the breakeven for each age band
Using the rebate amounts this calculator applies, the table reproduces the published thresholds to the rand. Rounding accounts for the last digit.
| Age band | Total rebate | Rebate / 18% = threshold |
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The R26,679 for the middle band is the primary R17,235 plus the secondary R9,444. The oldest band adds the tertiary R3,145 on top. Watch how a R12,589 jump in rebate from the youngest to the oldest band lifts the tax-free ceiling by roughly R70,000 of income, which is the leverage the 18 percent divisor produces.
Threshold versus the SARS filing requirement
A frequent confusion: earning below the threshold means you owe no tax, but it does not always mean you can skip filing a return. SARS sets its own submission criteria, and people with multiple income sources, certain allowances, or capital gains may still need to file even when their final liability is zero. Treat the threshold as a tax-payable line, not an automatic exemption from paperwork, and check the current filing rules with SARS each season.
The most common mistake is assuming the threshold protects every rand once you cross it. It does not. The moment your taxable income passes the line, the rebate stops cancelling everything and you pay 18 percent on the portion above zero, net of the rebate. The threshold is the switch-on point, not a slice that stays tax-free forever.
If I turn 65 mid-year, do I get the higher threshold?
Age for rebate purposes is generally taken at the end of the year of assessment, so turning 65 during the tax year usually means you qualify for the secondary rebate for that whole year. That single change can lift your tax-free ceiling by tens of thousands of rand. Confirm the exact rule and the current rebate value with SARS, since the timing test is what decides it.
Does the medical tax credit change my threshold?
No. The medical scheme fees tax credit is a separate rebate applied after this calculation, so it can push the income at which you actually start paying tax even higher, but it does not alter the age-based threshold shown here. This tool isolates the rebate-driven breakeven; medical credits are handled by their own calculator.