Potongan Cukai Berjadual (PCB) — also known as Monthly Tax Deduction (MTD) — is the mechanism by which Malaysian employers withhold income tax from employees' salaries each month and remit it to LHDN. For most salaried Malaysians, PCB is the entirety of their interaction with income tax: when the annual e-Filing season arrives, their final tax liability is already close to what was deducted across the year. Done correctly, PCB produces near-zero balance at year-end. Done carelessly, it results in nasty refund chases, surprise tax bills, or LHDN penalties for the employer.

This guide explains how PCB is calculated, what items are taxable and which are exempt, how reliefs are applied through TP1 and TP3 forms, the difference between PCB and final tax, and the common mistakes that catch both employers and employees off-guard.

What PCB Actually Is

PCB is a withholding tax — the employer deducts a portion of the employee's monthly remuneration and pays it to LHDN by the 15th of the following month. It is governed by the Income Tax (Deduction from Remuneration) Rules 1994 and updated annually through the PCB schedule.

The PCB amount is calculated to approximate the employee's annual income tax liability spread across 12 months. If the employee has no other taxable income and claims no additional reliefs at year-end, the cumulative PCB should closely match the final tax assessed.

Who Must Have PCB Deducted

  • All resident employees whose annual chargeable income exceeds the minimum threshold (currently RM35,000 after personal relief of RM9,000)
  • Non-resident employees, who are subject to a flat 30% withholding
  • Directors who receive a salary or director's fees from a Malaysian employer
  • Part-time employees once cumulative income crosses the threshold

Employees earning below the threshold are not subject to PCB but should still file an annual return if they have other income sources.

What Counts as PCB-able Remuneration

The base for PCB calculation is gross remuneration, which includes:

  • Basic salary and wages
  • Allowances (transport, meal, housing, shift, etc.) unless specifically exempt
  • Commissions and incentives
  • Bonuses (treated through the additional remuneration formula)
  • Director's fees
  • Benefits-in-kind (company car, accommodation, etc.) at prescribed values
  • ESOS/RSU value at exercise/vest
  • Tips and gratuities passed through the employer

Exempt items typically include:

  • Parking allowance up to RM2,400/year
  • Meal allowance up to RM3,000/year
  • Childcare allowance up to RM3,000/year
  • Reimbursements of actual business expenses
  • Statutory contributions (EPF, SOCSO, EIS) on the employer side

How PCB Is Calculated — The Cumulative Method

LHDN uses a cumulative calculation that converts each month's remuneration into an annualised figure, computes the tax that would be owed on the full year, and deducts what has already been withheld in prior months.

Simplified steps for a given month:

  1. Annualise year-to-date remuneration (YTD ÷ months elapsed × 12)
  2. Deduct allowable EPF (up to RM4,000), life insurance, and other approved reliefs
  3. Apply tax bands to compute the annual tax
  4. Subtract tax already paid via PCB in prior months
  5. The current month's PCB equals the remaining annual tax ÷ remaining months

This method self-corrects: a fluctuating bonus month is smoothed across the rest of the year rather than producing a single huge spike.

Worked Example

Aiman earns RM7,000/month basic with no allowances. He contributes 11% EPF (RM770/month). For January:

  • Annualised gross: RM7,000 × 12 = RM84,000
  • Less EPF (capped at RM4,000): RM84,000 − RM4,000 = RM80,000
  • Less personal relief: RM80,000 − RM9,000 = RM71,000 chargeable income
  • Tax on RM71,000 using 2024 bands: approximately RM4,800
  • Monthly PCB: RM4,800 ÷ 12 ≈ RM400

In a bonus month where Aiman receives RM10,000 bonus, the additional remuneration formula applies: estimate the additional tax owed on the bonus only, deduct it that month, and the regular monthly PCB continues unchanged.

TP1 and TP3 — Adjusting PCB During the Year

By default, PCB uses only the spouse and child relief codes the employee declared via TP1 (Form for Claim of Deduction by Employee). To claim further reliefs during the year — life insurance, education insurance, medical insurance, lifestyle relief, etc. — the employee submits TP1 to the employer with supporting evidence.

TP3 is used when an employee changes employers mid-year — the new employer needs YTD remuneration and YTD PCB from the previous employer to continue the cumulative calculation correctly. Without TP3, the new employer treats the new job as starting from zero, almost always under-deducting PCB and leaving the employee with a tax bill at filing time.

PCB vs Final Tax — Why They Differ

The annual e-Filing reconciles total tax owed against total PCB paid. Differences arise from:

  • Reliefs not declared via TP1 during the year (book purchases, sports equipment, broadband, etc.)
  • Rebates (zakat, departure levy, etc.)
  • Additional income outside employment (rental, freelance, dividends)
  • Income from a previous employer not transferred via TP3
  • Errors in benefit-in-kind valuation

If PCB exceeds final tax, LHDN issues a refund. If PCB falls short, the employee pays the balance — and may be subject to surcharge if the shortfall exceeds 10%.

Bonus PCB — The Additional Remuneration Formula

Bonuses are not simply added to the month's salary and run through the cumulative formula — that would produce excessive deductions because the bonus would be annualised as if it recurred every month. Instead:

  1. Compute the tax that would have been due on the year's normal salary alone
  2. Compute the tax that would be due on the year's salary plus the bonus
  3. The difference is the PCB attributable to the bonus, deducted in the bonus month on top of the regular PCB

Employer Responsibilities

  • Compute and deduct PCB correctly each month
  • Remit to LHDN by the 15th of the following month via e-PCB, FPX, or bank channels
  • Maintain CP39 (employee remuneration record) and CP159 (PCB schedule) for each employee
  • Issue EA Form to each employee by end of February summarising the previous year's earnings, deductions, and PCB
  • File E Form to LHDN by 31 March

Late PCB payment attracts a penalty of 10% of the unpaid amount.

Common PCB Mistakes

  • Forgetting EPF cap. The RM4,000 annual EPF deduction limit is widely missed; deducting actual contribution overstates relief.
  • Misclassifying benefits-in-kind. Company-provided phones, cars, and accommodation must be valued per LHDN's prescribed tables.
  • Treating bonus as ordinary salary. Annualising a one-off bonus drastically over-deducts.
  • Skipping TP3 on job changes. The under-deduction at the new employer produces a tax bill that surprises employees in April.
  • Stale PCB tables. Tax bands change periodically; using last year's schedule produces incorrect deductions.
  • Allowances assumed exempt. Many companies treat all allowances as tax-free; most are not.

Calculate PCB with Popupnote

The PCB Calculator on Popupnote computes accurate monthly PCB from your gross remuneration, EPF rate, allowances, and declared reliefs, using current LHDN tax bands. It also reports estimated annual tax, take-home pay, and the impact of a bonus month. The calculator runs in your browser without any account required.