PCB Monthly Tax Deduction Malaysia: How It's Calculated and When It Goes Wrong

PCB, short for Potongan Cukai Bulanan, is the amount your employer deducts from your salary every month and remits to LHDN on your behalf. It is a prepayment of your annual income tax, not the final bill. Whether it leaves you with a refund or a top-up in April depends entirely on how accurately your PCB matches your real tax liability for the year.

What PCB Actually Is

PCB (also called MTD, Monthly Tax Deduction) was introduced under the Income Tax Act 1967, specifically through the Income Tax (Deduction from Remuneration) Rules 1994. The core idea: instead of asking employees to settle one large tax bill each year, LHDN requires employers to collect tax in monthly instalments throughout the year.

When you file your income tax return via e-Filing by April or June each year, LHDN compares your total PCB paid against your actual tax payable. The difference either goes back to you or becomes a bill you owe.

How PCB Is Calculated

Your employer (or payroll software) uses one of two official methods.

Method 1: e-Jadual PCB (LHDN’s online table) Employers look up the deduction amount from LHDN’s published monthly tax deduction schedule, based on salary range and marital or dependent status. This is the simpler route for employers without payroll software.

Method 2: Computerised Payroll (Formula Method) Approved payroll software applies LHDN’s published formula directly. This method is more precise because it can incorporate individual relief declarations.

The Core Formula Logic

LHDN’s PCB formula projects your annual tax liability from your current monthly remuneration, then divides it into equal monthly instalments:

1. Annualise your remuneration: multiply this month’s pay by remaining months in the year, then add income already paid year-to-date.
2. Subtract declared reliefs to arrive at estimated chargeable income.
3. Apply the progressive tax rates (see table below) to get estimated annual tax.
4. Divide by remaining months to get this month’s PCB.

The formula reruns every month. A mid-year salary increase means higher PCB for the remaining months so the full-year liability is settled by December.

YA 2025 Progressive Tax Rates

These rates apply to resident individuals for Year of Assessment 2025 (source: LHDN).

Chargeable Income (RM)	Tax Rate	Tax on Band
0 to 5,000	0%	RM 0
5,001 to 20,000	1%	RM 150
20,001 to 35,000	3%	RM 450
35,001 to 50,000	6%	RM 900
50,001 to 70,000	11%	RM 2,200
70,001 to 100,000	19%	RM 5,700
100,001 to 400,000	25%	Up to RM 75,000
400,001 to 600,000	26%	Up to RM 52,000
600,001 to 2,000,000	28%	Up to RM 392,000
Above 2,000,000	30%	n/a

Individuals with chargeable income not exceeding RM 35,000 are eligible for a RM 400 tax rebate (YA 2025).

Reliefs That Reduce Your PCB

PCB is calculated on chargeable income, not gross salary. The base personal relief is RM 9,000 for all resident individuals (YA 2025, LHDN). Other common reliefs include EPF contributions (up to RM 4,000), life insurance (up to RM 3,000), medical and lifestyle reliefs, and spouse or child reliefs.

Your employer factors these in only if you declare them on Form TP1 (reliefs claimed via employer) or Form TP3 (income and PCB from a previous employer in the same year).

The TP1 and TP3 Forms: Why They Matter

Form TP1 is the mechanism by which you instruct your employer to factor your personal reliefs into the monthly PCB calculation. If you never submit TP1, your employer can only apply the default individual relief of RM 9,000. Every other relief you are entitled to will be ignored in the monthly calculation, leading almost certainly to over-deduction.

Form TP3 captures remuneration and PCB already deducted by a previous employer in the same calendar year. If you change jobs and your new employer does not receive a TP3, the new PCB calculation restarts from zero, as if you earned nothing earlier that year. The result is under-deduction early in the new job and possibly a catch-up bill at filing time.

Both forms must be submitted to your employer at the start of employment, after any major life event (marriage, new child, retirement of a spouse), or whenever your relief profile changes.

When PCB Goes Wrong: Over-Deduction

Over-deduction means more PCB was taken from your salary than your actual tax liability. This is common when:

• You never submitted Form TP1, so reliefs were not factored in.
• You contributed to EPF, SOCSO, or private retirement schemes but did not declare them.
• You claimed eligible reliefs only when filing your return, not upfront via TP1.
• You had additional reliefs in the second half of the year (newborn child, medical expenses) that your employer never knew about.

The outcome is usually a refund. When you file your e-Filing return, LHDN calculates your actual liability, compares it against total PCB paid, and issues a repayment. Repayments are typically processed within 30 working days for e-Filing submissions, and credited to the bank account you register with LHDN.

When PCB Goes Wrong: Under-Deduction

Under-deduction means your monthly PCB was too low and you owe more tax at filing time. Common causes: a mid-year bonus or increment that was not re-annualised correctly, changing jobs without submitting TP3 (causing duplicate relief application at the new employer), or overstated reliefs on TP1.

Under-deduction alone does not trigger a penalty. If the shortfall is large and LHDN determines negligence or intentional understatement, a 10% late payment penalty under Section 107C of the Income Tax Act 1967 may apply.

Over-Deduction vs Under-Deduction at a Glance

Situation	Likely Cause	Year-End Result
Large refund every year	TP1 not submitted, reliefs not declared	Good short-term, cash flow inefficiency
Small, consistent refund	Minor relief timing difference	Normal outcome
Consistent top-up payment	Bonus/commission PCB mismatch	Review employer payroll
Large top-up plus penalty	TP3 not submitted after job change	Rectify immediately

Year-End Reconciliation: What Happens When You File

The April 30 e-Filing deadline is when reconciliation happens formally. Log in to MyTax at mytax.hasil.gov.my, pre-fill your employment income from Form EA (employers must issue this by end of February), enter all reliefs, and the system does the rest. Your total PCB paid is subtracted from the final tax liability: a positive balance means you owe; a negative balance triggers a refund.

Employers reconcile via Form E, due by March 31 each year, which declares total remuneration paid and total PCB deducted. Mismatches between Form E and individual e-Filing returns can trigger LHDN queries.

Practical Steps to Prevent Mismatches

• Submit Form TP1 at the start of each year, not only when joining a new employer.
• Submit Form TP3 on your first day at a new job so your new employer annualises correctly from day one.
• Cross-check your payslip PCB against LHDN’s e-Jadual PCB calculator using your gross monthly pay and declared reliefs.
• Update TP1 after life events: marriage, a new child, or a spouse leaving employment all shift your relief profile.
• Collect Form EA by early March before filing; the PCB figure on it is the official reconciliation input.

For a full picture of income tax filing in Malaysia, including how to read your Notice of Assessment and handle LHDN queries, see the tax-government guide on WangWise.

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Key Takeaways

• PCB is a monthly income tax prepayment, not a final tax charge. It is reconciled when you file your annual return.
• The PCB amount is recalculated every month based on your projected annual income and declared reliefs.
• Not submitting Form TP1 is the single most common cause of over-deduction; not submitting Form TP3 after a job change is the most common cause of under-deduction.
• Over-deduction results in a refund; under-deduction results in a top-up payment and potential penalties for large shortfalls.
• Always verify your monthly PCB on your payslip using LHDN’s official PCB calculator.

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Frequently Asked Questions

Does paying PCB every month mean I do not need to file an income tax return?

No. PCB is a prepayment mechanism, not a substitute for filing. You are still required to file your annual income tax return via e-Filing. When in doubt, file.

What if my employer deducted the wrong PCB amount?

Contact your HR or payroll department and request a correction for subsequent months. The final reconciliation at e-Filing will catch any residual difference. Keep your payslips as evidence.

Can I reduce my PCB voluntarily if I expect a large refund?

Not directly. The correct approach is to submit a fully completed TP1 form with all your eligible reliefs, which lowers the calculated PCB amount through the official channel. Employers are not permitted to deduct less than the formula requires.

How long does an LHDN tax refund take after e-Filing?

LHDN targets repayment within 30 working days for e-Filing submissions with a valid bank account registered in MyTax. Track the status of your repayment through the MyTax portal.

Does PCB apply to freelance income?

PCB applies to employment income under an employer-employee relationship. Freelancers pay tax through the CP500 instalment scheme or settle in full when filing. If you receive both employment and freelance income, only the employment portion is subject to employer PCB deduction.