Your First Bonus or 13th Cheque: How It's Taxed and What to Do With It

Photo: Abdullahi Sow / Pexels

Your contract says you get a 13th cheque in December. You do the maths: one extra month's salary. Then the payslip arrives and a much bigger chunk has gone to SARS than in any other month, and you wonder whether payroll got it wrong.

Usually they didn't. Here's how bonus tax actually works, whether any of it comes back, and how to split what's left when it seems as if everyone already has plans for it.

If you haven't looked closely at a payslip before, read our guide to your first payslip first.

Bonus, 13th cheque or performance bonus?

People use these words interchangeably, but there are differences:

• 13th cheque: usually one extra month's basic salary, paid once a year, often in November or December. In your first year it's often pro-rated, so if you started in June you might get about half.
• Performance bonus: tied to targets, ratings or company results. The amount changes from year to year, and it can be zero.
• Ex gratia or festive bonus: a once-off amount the employer decides to pay. There's no promise of another next year.

Is a 13th cheque a legal right? Not automatically. The Basic Conditions of Employment Act sets minimums for hours, leave and notice, but it doesn't require any bonus. A 13th cheque becomes enforceable when it's written into your contract or a collective agreement. Wording matters: "the employee shall receive a 13th cheque" is a promise, while "a bonus may be paid at the company's discretion" isn't.

Once it is a contractual term, the employer can't simply take it away. In a case reported in February 2026, the Labour Court ordered an employer to pay 13th cheques it had stopped without the workers' agreement. Employers sometimes argue a benefit was only a "practice". Whether a long-running practice is enforceable depends on the facts, so if yours is cut, ask your union or the CCMA.

For what the BCEA does guarantee, see your rights in your first job.

Why more tax comes off a bonus month

The SARS method is simple once you see it. According to SARS's employer guide, your employer:

1. Works out the annual equivalent of your normal pay (your monthly salary times 12).
2. Calculates the tax on that annual figure.
3. Adds the bonus and calculates the tax on the new total.
4. Deducts the difference from the bonus as PAYE.

The key part: your primary rebate (R17,820 for 2026/27) is a fixed amount that's already used up by your salary. So none of the rebate is left over to offset tax on the bonus, which is taxed at your marginal rate, the rate on your top rand of income.

That's why it feels harsh. On R12,000 a month, your average tax is under 6% of your salary, but your bonus is taxed at 18%. Above R245,100 a year, the marginal rate rises to 26%.

One piece of good news: if your salary plus bonus stays under the R99,000 tax threshold for 2026/27 (for people under 65), no PAYE comes off at all. Someone earning R7,000 a month with a R7,000 13th cheque earns R91,000 for the year, which is below the threshold.

Worked example: Lindiwe on R12,000 a month

Example figures. Lindiwe, 23, earns a basic salary of R12,000 a month. Her contract includes a 13th cheque of one month's basic salary, paid with her December salary. She has no retirement fund or medical aid deductions. Tax figures are for the 2027 tax year (1 March 2026 to 28 February 2027).

A normal month:

• Annual equivalent: R12,000 × 12 = R144,000
• Tax: 18% of R144,000 = R25,920, less the R17,820 rebate = R8,100 a year
• PAYE: R8,100 ÷ 12 = R675 a month
• UIF: 1% = R120
• Take-home: R11,205

December, with the 13th cheque:

• Annual equivalent plus bonus: R144,000 + R12,000 = R156,000
• Tax: 18% of R156,000 = R28,080, less R17,820 = R10,260
• Tax on the bonus: R10,260 − R8,100 = R2,160
• December PAYE: R675 + R2,160 = R2,835
• UIF: 1% of R24,000 would be R240, but UIF is capped at R177.12 because the earnings ceiling is R17,712 a month
• Take-home: R24,000 − R2,835 − R177.12 = about R20,988

So her PAYE more than quadruples, from R675 to R2,835. But of the extra R12,000, she keeps about R9,783. That's exactly what the tax tables say she owes on it, not a payroll mistake.

Does it even out at tax time?

If you work for the same employer for the whole tax year and payroll uses the method above, the PAYE on your bonus should already be correct. Your auto-assessment or return in mid-2027 will show little or no difference.

It doesn't even out, often in your favour, when:

• You started work part-way through the tax year. Payroll calculates your tax as if you'd earn your monthly salary for the full year. If Lindiwe had started in September 2026, she'd earn about R72,000 in salary by February plus a pro-rated cheque, which is under R99,000. SARS would refund the PAYE when it assesses her.
• You had a gap between jobs, which has the same effect.
• You contributed to a retirement annuity outside work, which lowers your taxable income on assessment.

It can go the other way if you had two employers at once or side income, because each payroll thinks it's your only income. See our first tax return guide for how auto-assessment and refunds work.

Retirement funds and the two-pot system

If you're in a company pension or provident fund, check whether contributions are taken off the bonus. Many funds only use your basic or "pensionable" salary, so the bonus isn't touched. Others include it.

Some employers let you put part of a bonus into the fund as an extra contribution. Retirement contributions are tax-deductible up to 27.5% of your remuneration or taxable income, with an annual cap of R430,000 from 2026/27, so money that goes in before tax avoids the 18% or 26% you'd otherwise pay. The trade-off is access: under the two-pot system, one-third of new contributions goes to your savings pot and two-thirds stays locked until retirement. Ask HR or your fund what options you have, and read our two-pot guide before choosing.

Using a savings pot withdrawal to "top up" December has the opposite effect: it's taxed at your marginal rate too, and it comes on top of the bonus.

Splitting it: a plan before the money lands

A bonus without a plan tends to be gone by Christmas Eve. Decide on the split before the payslip arrives, while the money still feels abstract. One approach is to work through these in order:

1. Fix what's on fire. Accounts in arrears, a debt with collection calls, overdue rent. Bringing an account up to date stops penalty interest and protects your credit record. If debt is the bigger problem, read getting out of debt in your 20s.
2. Set aside a January bridge. Many employers pay December salaries early, before Christmas. The next payday might be five or six weeks away, and January brings school fees, uniforms and transport costs. Leave enough for at least two weeks' living costs for January in a separate account.
3. Start or top up an emergency fund. A bonus is one of the few times a new earner can save a month's expenses at once. See emergency fund first, tax-free savings second for where to keep it.
4. Decide the family amount on purpose. (More on this below.)
5. Spend the rest without guilt. A planned treat is fine. The problem is the unplanned one paid for with credit.

For Lindiwe's R9,783, that could look like: R3,000 January bridge, R3,000 emergency fund, R2,000 to family, R1,783 for December. Your numbers will look different. The point is that every rand has a job.

When family expects a share

A recurring question on South African forums every November goes something like: am I selfish for not telling my mom about my bonus? It comes up because for many first earners, a bonus isn't private news. Family members may know about 13th cheques, and the expectation can arrive before the money does.

Wanting to help is normal and often right. What causes trouble is giving without a plan, then running short and borrowing in January. Some honest ways to handle it:

• Decide the amount first, then share it. "I've put aside R2,000 for home this December" is easier to say, and harder to argue with, than talking about the whole bonus.
• Be open about the deductions. "It's R12,000 on paper, but after tax it's under R10,000, and I have to make it last until the end of January." That's simply true.
• Offer something specific. Paying for groceries for the festive season or a sibling's stationery is clearer than handing over cash for "whatever's needed".
• Saying no to a bigger ask: "I can't do that this time. I'm building savings so I don't have to borrow when something goes wrong, and that protects all of us."

You don't owe anyone your full payslip. But if family is part of your monthly budget too, plan around it with our guide to budgeting with family support.

Festive-season traps to watch for

• Black Friday (27 November 2026) comes just before most bonuses. Spending a bonus before it arrives, on credit, is how it disappears twice.
• New store cards and clothing accounts offered at the till. Each one is a hard credit enquiry and a new monthly instalment that lasts well past January. See building credit from zero for a better way to build a record.
• "Buy now, pay later" for gifts. Easy in December, but those instalments come out of January's salary.
• January payday loans. If you run short, a short-term loan can cost up to 5% interest a month plus fees. Holding back a bridge in step 2 is what prevents this.
• Bonus-season "investment" schemes. Anyone promising to double your money by Easter, especially via WhatsApp, is running a scam.

The short version

A bonus is taxed at your marginal rate, not your average rate, because your rebate is already used up by your salary. On R12,000 a month in 2026/27, that's 18%. On a R12,000 13th cheque, you keep about R9,783. If you worked the full tax year for one employer, that's usually the right amount. If you started part-way through, you may get some back when SARS assesses you. Check your contract to see whether the cheque is guaranteed, decide the split before it lands, and keep enough back to get through January.

Rule of thumb: plan for the after-tax figure, not the gross. Then put January first, savings second, family third (set the amount on purpose), and enjoy whatever is left.