PCB Tax Deduction Explained: What Every Malaysian Employee Should Know

Every Malaysian employee who earns a salary above the minimum threshold sees a line item on their payslip labelled PCB — and many have little idea what it represents, how it is worked out, or why the figure changes from month to month. This guide demystifies PCB completely, walking you through the legal framework, the calculation method, the factors that push your deduction up or down, and the practical steps you can take to make sure you never overpay the taxman.

What is PCB (Potongan Cukai Bulanan)?

PCB stands for Potongan Cukai Bulanan, which translates directly as “Monthly Tax Deduction.” In everyday English it is often called the monthly tax withholding or simply the MTD (Monthly Tax Deduction) scheme.

PCB is not a separate tax. It is a compulsory advance collection mechanism for Malaysia’s personal income tax, authorised under Section 107(c) of the Income Tax Act 1967. The legal obligation sits with your employer: they must calculate an appropriate amount of income tax each month, deduct it from your gross pay, and remit it to the Inland Revenue Board of Malaysia — LHDN (Lembaga Hasil Dalam Negeri) — by the 15th of the following month.

The underlying principle is straightforward. Rather than asking individuals to save up and pay their entire year’s income tax in one lump sum when they file their annual return, the government collects it gradually, in monthly instalments, throughout the year. By year-end, most employees find that their total PCB deductions closely match their actual tax liability, leaving only a small true-up amount to pay or reclaim.

Employers who fail to deduct or remit PCB correctly face penalties under the Income Tax Act, including fines and prosecution. This gives employees reasonable assurance that the system works as intended — as long as the data fed into the calculation is accurate.

How PCB is Calculated

LHDN provides two officially recognised methods for employers to calculate PCB each month.

The Computerised Calculation Method (e-PCB / CP38 Formula Approach)

This is the primary method used today. The calculation follows this logical sequence:

1. Project annual income. The employer takes the employee’s current monthly gross salary and multiplies it by the number of remaining months in the year (including the current month), then adds any income already earned in the year. The result is an estimated gross annual income.

2. Deduct personal reliefs. The employer applies the personal reliefs and deductions that the employee has declared on their Borang TP1 (also known as the TP1 form). This reduces the estimated annual taxable income. If no TP1 has been submitted, only the basic personal relief of RM9,000 is applied.

3. Calculate annual tax. The estimated taxable income is run through the progressive income tax brackets (detailed below) to arrive at an estimated annual tax figure.

4. Subtract tax already paid. Any PCB already deducted in the current year is subtracted from the estimated annual tax, giving the remaining tax for the rest of the year.

5. Divide by remaining months. The remaining annual tax is divided by the number of months left in the year to produce the PCB amount for the current month.

This “spreading” approach means PCB is recalculated every month using the most current salary information. It also means that a salary increase mid-year will immediately result in a higher PCB, because the employer is now projecting a higher annual income and making up for any shortfall in earlier months.

The Jadual PCB (Tax Tables) Method

Before computerised payroll became universal, employers used printed Jadual PCB — statutory tax tables published annually by LHDN. The tables gave a pre-calculated monthly deduction figure based on gross monthly salary, number of children, and marital status. This method is still permitted but is rarely used today, as payroll software makes the formula approach more accurate and easier to maintain.

Malaysia Income Tax Brackets 2026

PCB is calculated using progressive tax rates, meaning each ringgit of income is taxed only at the rate applicable to that specific income band. The rates for the year of assessment 2026 are as follows:

To illustrate: an employee with a chargeable income of RM60,000 does not pay 13% on the full RM60,000. They pay 0% on the first RM5,000, 1% on the next RM15,000, 3% on the next RM15,000, 8% on the next RM15,000, and 13% only on the final RM10,000. The overall effective tax rate is therefore significantly lower than the marginal rate at the top bracket.

These brackets apply to chargeable income, which is gross income minus all eligible deductions and reliefs — not to gross salary.

What Affects Your PCB Amount?

Several factors cause your monthly PCB deduction to fluctuate.

Salary changes. A pay rise, promotion, or new employment agreement immediately changes your projected annual income, triggering a recalculation that redistributes the remaining tax liability across fewer months.

Bonus payments. When your employer pays a bonus (annual bonus, performance bonus, or contractual incentive), it is added to your annual projected income in the month it is paid. This typically causes a sharp spike in PCB for that month (see the section on bonuses below).

Overtime and allowances. Taxable allowances and overtime pay increase your gross income and thus your projected annual income, pushing PCB upward.

Marriage or divorce. Getting married (and filing a joint assessment) or divorce changes your eligibility for the spousal relief (currently RM4,000) and alters the calculation. You inform your employer via a TP1 update.

Having children. Each child below a certain age qualifies for child relief (RM2,000 per child for the first three children under 18; higher amounts for disabled children). Updating your TP1 with a new child reduces your PCB.

Submitting or updating a TP1 form. Any change to your personal circumstances that affects tax relief — insurance, medical costs, education fees, EPF contributions — can be declared to your employer via the TP1 form, reducing your monthly deduction.

The TP1 Form — How to Reduce Your PCB

The Borang TP1 is a form you submit to your employer to declare your eligible tax reliefs so that your PCB reflects those deductions. Without it, your employer can only apply the basic RM9,000 personal relief, and you may significantly over-deduct each month — essentially giving the government an interest-free loan.

You can submit a TP1 at any time during the year, and your employer must apply the updated reliefs from the following month. Common reliefs to declare on the TP1 include:

• EPF contributions — employee’s statutory 11% EPF contribution is deductible up to RM4,000
• Life insurance and takaful premiums — up to RM3,000 (combined with EPF, subject to the RM4,000 cap for life insurance alone)
• Medical and education insurance — up to RM3,000
• Lifestyle relief — up to RM2,500 (books, computers, internet, sports equipment, gym membership)
• Child care fees — up to RM3,000 for children aged 6 and below
• Spouse relief — RM4,000 if spouse has no income
• Child relief — RM2,000 per qualifying child (higher amounts for disabled children or children in higher education)
• Disability relief — RM6,000 if you are a person with a disability
• Medical expenses for parents — up to RM8,000
• SOCSO and EIS contributions — deductible as part of the individual relief framework
• Private retirement scheme (PRS) contributions — up to RM3,000

The TP1 is not filed with LHDN directly — it is submitted to your employer. Your employer is responsible for keeping the form on file for audit purposes. You reconcile all reliefs accurately when you file your annual tax return (Form BE or Form B) by March/April of the following year.

PCB and Bonus Payments

Bonuses are a common source of confusion around PCB. Here is how employers are required to handle them under LHDN’s rules.

When a bonus is paid in a particular month, the employer must:

1. Annualise the combined income. Take the employee’s monthly salary, project it over 12 months, add the bonus amount, and treat the total as the new estimated annual income.
2. Recalculate the full annual tax on this higher projected income.
3. Subtract PCB already paid in the year to date.
4. Divide the remainder by the number of remaining months (including the bonus month) to get the PCB for that month.

The practical effect is that the month you receive your bonus, your PCB deduction will be noticeably higher than usual. This is not an error — it is the correct application of the rules. The employer is collecting tax on your bonus income in the same month it is paid, which avoids leaving a large unpaid tax liability at year-end.

If your bonus is paid in December (the last month of the year), the entire remaining annual tax falls on that one month, which is why large December bonuses sometimes come with very large PCB deductions.

PCB Rounding Rules

LHDN specifies how the final PCB figure must be rounded:

• The calculated monthly PCB is rounded to the nearest Ringgit (not the nearest sen).
• If the calculated PCB amount for any month is less than RM10, no deduction is made for that month. This minimum threshold is intended to avoid administrative cost for trivially small deductions.
• Rounding applies after the full formula calculation — you do not round intermediate steps.

These rules apply uniformly across all employers and payroll systems.

How to Verify Your PCB

You should not simply accept the PCB figure on your payslip without checking it. Errors do occur — particularly after salary changes, mid-year promotions, or when HR systems are configured incorrectly.

Use our PCB Calculator. Our PCB Calculator replicates the LHDN formula. Enter your gross monthly salary, marital status, number of children, and key reliefs to see your expected PCB deduction.

Check LHDN’s e-PCB portal. LHDN operates the e-PCB system at hasil.gov.my, which employers use to remit PCB. While employees cannot access employer submissions directly, you can log into MyTax (mytax.hasil.gov.my) to see your PCB records and ensure remittances have been made.

Review your payslip carefully. Your payslip must show the PCB amount deducted. Compare it with your own calculation. If there is a discrepancy, check whether your employer has correctly applied your TP1 reliefs.

If you believe your PCB is wrong. First, raise the matter with your HR or payroll department. Provide them with a copy of your submitted TP1 form and a breakdown of your expected calculation. Most discrepancies are resolved at this stage. If the employer refuses to correct an error, you can contact LHDN’s Taxpayer Services hotline at 1-800-88-5436 or visit a nearby LHDN branch.

Annual reconciliation. When you file your annual tax return (Form BE, due by 30 April for salaried employees), you report your total PCB paid for the year. LHDN reconciles this against your actual tax liability:

• If you paid more PCB than you owe, LHDN issues a tax refund, typically within 30 working days of e-filing.
• If you paid less than you owe, you pay the balance. Interest at 10% per annum applies to late tax payments.

Submitting a complete TP1 form and keeping your employer informed of any changes to your circumstances is the most effective way to ensure your PCB is accurate throughout the year, minimising both the risk of a large year-end bill and the inconvenience of waiting for a refund.