Why bonuses can mean a bigger PAYE deduction

Seeing a large tax deduction next to your bonus can be an unpleasant surprise. The gross bonus and the amount that reaches your account can differ quite a lot once PAYE is calculated.

You open your payslip expecting the bonus to give your bank account some breathing room, then PAYE takes a much larger bite than usual. It can look as if your bonus has been taxed at some brutal special rate, especially when the gross amount looked far more exciting before deductions.

PAYE is the employees’ tax your employer deducts from remuneration and pays to SARS. A bonus is taxable remuneration, and SARS treats an annual or incentive bonus as an annual payment for PAYE purposes.

Why PAYE jumps in the bonus month

Your regular monthly PAYE is based on your remuneration. When an annual bonus is paid, payroll works out the annual equivalent of your remuneration, combines it with the bonus, then compares the tax on those two amounts. The difference becomes the employees’ tax attributable to the bonus.

The SARS PAYE guide for the 2027 tax year provides an example of an employee earning R28,000 a month who receives a R14,800 bonus. Regular monthly PAYE is R4,171, while tax attributable to the bonus is R3,778, taking PAYE for that month to R7,949.

A bonus can also place part of your annual taxable income in a higher tax bracket. A higher bracket does not mean every rand you earned for the year gets taxed at the higher percentage. The higher rate applies to the portion that falls inside that bracket.

A bonus can look generous in the gross column and far smaller in the net column. PAYE is not calculated on the bonus as if it lives in its own little tax universe; payroll measures what the extra annual payment does to the tax calculation.

Check the payslip before spending the gross amount

The easiest mistake is mentally spending the figure mentioned in your bonus letter before seeing the net amount. Your payslip should show the gross remuneration, deductions and amount paid after deductions.

If payday money already has several expenses waiting for it, work from the amount that reaches your account. A split-salary approach can help separate fixed costs, savings and everyday spending once you know what is available.

A deduction that looks unusually high is worth querying with payroll. Ask for the bonus PAYE calculation and compare it with the figures on your payslip before assuming something went wrong.

Your gross bonus is not the amount you can plan from. The payslip tells you what reached you after PAYE and other authorised deductions. Checking that figure first gives you a cleaner starting point for any bonus plans.

A bonus can increase PAYE sharply in one payslip because the tax calculation has more remuneration to account for. The gross bonus is not a promise of what will reach your bank account. Understanding the calculation turns a nasty payslip shock into a number you can check, query and plan from.