Is overtime taxed more in South Africa?
No, overtime is not taxed at a higher rate than your normal pay. Overtime, commission, and a bonus are all just more income, added to your salary and taxed on the same SARS table. What confuses people is the marginal rate: if extra earnings push part of your income into the next bracket, only that slice is taxed at the higher percentage, not your whole salary and not the whole of the overtime.
The reason a payslip can show a big jump in PAYE in a heavy-overtime month is separate, and it is about how monthly PAYE is estimated, not about overtime carrying a special rate.
Tax is on the slice, not the salary
South Africa uses a sliding scale. For the 2026 year of assessment the brackets run like this:
| Taxable income | Tax |
|---|---|
| R1 to R237,100 | 18% of taxable income |
| R237,101 to R370,500 | R42,678 + 26% of the amount above R237,100 |
| R370,501 to R512,800 | R77,362 + 31% of the amount above R370,500 |
Each rate applies only to the income inside that band. Crossing into the 31% band does not retax the income below R370,500 at 31%. It only taxes the rand above R370,500 at 31%. That is what "marginal rate" means: the rate on your next rand, not on all your rands.
A worked example
Take someone earning R360,000 for the 2026 year, who then works overtime worth R20,000, lifting total income to R380,000. R360,000 sits in the 26% band; R380,000 crosses into the 31% band at R370,500.
Tax on R360,000:
- R360,000 less R237,100 = R122,900
- R122,900 x 26% = R31,954
- R42,678 + R31,954 = R74,632
- Less the primary rebate of R17,235 = R57,397
Tax on R380,000:
- R380,000 less R370,500 = R9,500
- R9,500 x 31% = R2,945
- R77,362 + R2,945 = R80,307
- Less the primary rebate of R17,235 = R63,072
So the R20,000 of overtime added R63,072 less R57,397, which is R5,675 in tax. That splits cleanly: the first R10,500 of overtime (up to R370,500) was taxed at 26% = R2,730, and only the last R9,500 at 31% = R2,945. The effective rate on the overtime is R5,675 / R20,000, about 28.4%. Nowhere is anything taxed at a punitive rate, and the original salary keeps its own rates.
Why a payslip can still look brutal
If overtime is not taxed more, why does PAYE sometimes spike in a big month? Monthly PAYE works by annualising: payroll takes the month's pay, multiplies it out as if you earned that every month, taxes the annual figure, and divides back. A month with heavy overtime gets annualised as though every month looked like that, so PAYE is over-estimated for that month. It evens out over the rest of the year, and any genuine over-deduction comes back when you are assessed. The annual sum is still tax on the same table.
Frequently asked questions
Is overtime taxed at a higher percentage than normal salary?
No. Overtime is added to your other income and taxed on the same SARS sliding scale. It can push part of your income into a higher bracket, but only that slice is taxed at the higher rate. Your salary below the bracket line keeps its own lower rates.
Why was so much PAYE taken in my big overtime month?
Monthly PAYE annualises your pay: it assumes the month repeats all year, taxes that larger annual figure, and divides back. A heavy overtime month gets over-taxed on that assumption, then corrects over the following months or on assessment. The overtime itself carries no special rate.
Does the same logic apply to commission and bonuses?
Yes. Commission, a bonus, and overtime are all just additional income on the same table. None has a penalty rate. Each is taxed at your marginal rate, meaning the rate on the band it falls into, with only the portion above a bracket line taxed at the higher percentage.
How do I work out the tax on my own overtime?
Calculate your tax with the overtime included and again without it, both on the SARS table with your rebate, then take the difference. That difference is the true tax on the overtime, and it is usually a blend of two bracket rates rather than a single high one.
See your own marginal rate
The cleanest way to settle the question is to run both numbers. Our Basic income tax and PAYE calculator applies the 2026 SARS table and rebate, so you can compute your tax with and without the extra earnings and read off the real cost. Our guide on how a bonus is taxed works the same marginal-rate idea for once-off pay, our explainer on how PAYE is calculated shows the monthly annualising that causes the spike, and our piece on tax brackets and rebates sets out the bands in full.
SARS sources:
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