A bonus is additional remuneration
Your regular monthly salary is normal remuneration. A bonus, along with overtime, commission and other irregular payments, is additional remuneration. When a bonus lands in your payslip, it is added to that month’s taxable income, which raises the income figure the PCB formula annualises — and that is why the deduction in a bonus month is usually larger than in an ordinary month.
This is expected behaviour, not a payroll error. The bonus increases the tax the formula expects you to owe for the year, and part of that extra tax is collected in the same month the bonus is paid.
Why bonus PCB is not one flat percentage
People often assume a bonus is taxed at a single headline rate. It is not. HASiL uses a dedicated additional-remuneration step so a one-off payment does not distort your normal monthly PCB. In practice it compares the tax on your income with the bonus against the tax without it, and the difference becomes the PCB attributed to the bonus.
Because that difference depends on where your annualised income already sits in the progressive tax bands, the same RM5,000 bonus can produce a very different deduction for two colleagues. There is no fixed “bonus rate” to apply.
What changes the bonus PCB result
Several inputs feed the calculation, so your bonus PCB reflects your whole situation, not just the bonus amount:
- Your normal salary — a higher base salary means the bonus is stacked on top of a higher band.
- Year-to-date income — how much you have already earned and how many months remain in the year.
- Prior PCB paid — tax already deducted year-to-date is taken into account.
- EPF contributions — employee EPF on the bonus and salary reduces the taxable base.
- Reliefs and rebates — self, family and approved TP1 reliefs, plus any zakat rebate.
Change any one of these and the bonus PCB changes with it, which is why an estimate should use your real figures rather than a rule of thumb.
A worked bonus scenario
Imagine you earn RM5,000 a month and receive a RM5,000 bonus in a mid-year payslip. That month, your taxable income is roughly double your usual pay, so the formula annualises a higher figure, works out the tax on it after EPF and reliefs, subtracts the PCB you have already paid this year, and spreads the remainder over the months left — which is why the bonus-month deduction jumps well above a normal month.
The exact ringgit figure depends on your reliefs, EPF, family status and year-to-date history, so rather than rely on a guessed number, put your own salary and bonus into the PCB Calculator using the additional-remuneration input to see the estimate and the full breakdown for that month.
Gross bonus, deductions and net bonus received
Your gross bonus is the headline amount your employer approves. From it come statutory deductions — the extra PCB for the month, your EPF contribution on the bonus, and SOCSO or EIS where applicable. What lands in your account is the net bonus, which is smaller than the gross figure.
Seeing the gross bonus advertised and then a lower amount credited is normal. The gap is mostly the additional PCB and EPF for that month, not a deduction you have lost — the PCB is a prepayment towards your annual tax.
Common mistakes when estimating bonus take-home
- Applying a single flat percentage to the bonus — bonus PCB is not one fixed rate.
- Forgetting that EPF is also deducted from the bonus, on top of PCB.
- Ignoring year-to-date income and prior PCB, which change the result depending on the month.
- Assuming the higher deduction is permanent — it reflects one month, and the year settles on your actual income.
- Treating the extra PCB as money lost rather than a prepayment of annual tax that is reconciled when you file.
Estimate your bonus PCB
To see a realistic figure for your bonus month, open the PCB Calculator, enter your normal salary and details, then put the bonus amount into the “Additional remuneration this month” input. The breakdown shows the estimated PCB with and around the bonus so you can plan your take-home pay. Treat it as an estimate for planning and confirm the official figure with your employer payroll or HASiL.