Why your bonus gets taxed so hard (it actually doesn't)
There's no special 'bonus tax' in South Africa. Here's why your 13th cheque looks half-eaten, and why some of it often comes back at filing season.
5 min read
December arrives, your 13th cheque lands, and roughly a third of it is gone. Cue the annual myth: "bonuses are taxed at a higher rate." They aren't. Here's what's actually happening.
There is no bonus tax rate
SARS taxes your total income for the year — salary, bonus, overtime, everything — using the normal tax tables. A bonus is just more income.
The confusion comes from how PAYE is calculated in the month you receive it.
The annualisation effect
Each month, payroll estimates your annual income and withholds one month's share of the annual tax. When a bonus lands, that month's income spikes — and the extra income sits on top of your salary, so it's taxed at your marginal rate from the first rand.
Your normal salary enjoys the lower brackets and the rebate. The bonus doesn't get to reuse them — they're already used. So if your marginal rate is 26%, expect roughly 26% of the bonus to go to PAYE. It feels heavier than your usual payslip deduction because your average rate is much lower.
Sometimes payroll over-withholds
If your employer taxes the bonus by annualising it (treating the spike as if you earn that much every month), too much PAYE can be withheld. That's not money lost — it comes back as a refund when you file your tax return. It's also the main reason many salaried people get refunds at all.
A worked example
Salary R25,000/month (R300,000/year), December bonus R25,000:
- Marginal rate at R300,000: 26%
- Tax on the bonus: about R6,500
- You take home roughly R18,500 of it
Meanwhile your regular monthly PAYE is about R3,367 — an effective rate closer to 13%. The bonus didn't get punished; it just didn't get the head start.
Make the bonus work
Two things worth knowing before you spend it:
- An RA contribution before the end of February is deducted at that same marginal rate — a R10,000 top-up costs a 26% taxpayer only R7,400 after the refund. Numbers in the RA calculator.
- Unused TFSA room expires at the end of the tax year — the TFSA tracker shows what you have left.