PCB explained: why you can still owe tax after PCB.

The most common message in Malaysian tax groups every May goes something like this: my company deducts PCB every month, so why does MyTax say I still have tax to pay? This page answers it properly, with a real ringgit example, and explains the one form most people have never heard of that prevents it.

What is PCB?

PCB stands for Potongan Cukai Bulanan. In English LHDN calls it MTD, monthly tax deduction. Same thing. Your employer is required by law to work out an amount every payday, take it from your salary and pay it to LHDN on your behalf by the 15th of the following month. At the end of the year the total appears on your EA form as line D1.

PCB is not an extra tax sitting on top of income tax. It is your income tax, collected in twelve instalments so that you are not hit with one large bill in April. If you want to see what your salary should have deducted, our PCB calculator runs LHDN's own 2026 formula, bonus month included.

Why PCB is only an estimate

Your employer's payroll only knows a few things about you: your salary, your EPF, whether you are married and whether your spouse works, and how many children you have. The PCB formula gives you the automatic RM9,000 individual relief, your EPF up to RM4,000, and spouse and child relief where they apply. That is all.

Everything else is invisible to it. Your SOCSO and EIS relief, lifestyle purchases, medical bills, insurance, SSPN, childcare fees, your parents' medical costs: none of them reach PCB unless you declare them to your employer on Form TP1. Most people never do. And payroll also cannot see anything that is not your salary from that one employer.

So PCB misses in two directions. It tends to overshoot for someone with one job and a few reliefs, which is why most employees who file get a small refund. It undershoots whenever there is income payroll does not know about, and that is where the unexpected bills come from.

PCB was already deducted, so why do I still owe tax?

Because the PCB was calculated on a smaller picture than your real year. These are the usual reasons, roughly in the order they turn up.

You changed jobs and did not give the new employer Form TP3. TP3 tells your new employer what you earned and how much PCB was deducted earlier in the same year. Without it, the new payroll assumes the months it pays you are your whole year's income, which puts you in a much lower band. This is the big one, and the worked example below shows exactly how big.

You had two jobs at the same time. Each employer deducts PCB as if it were your only employer. Each one gives you the RM9,000 relief and the low bands. On your return you get the relief once and the combined income is taxed at your real band.

You earned something PCB never saw. Rental, a side business, freelance work or commission from another company are all added to your income when you file. If any of it is business income you are on Form B, not Form BE, and our side income guide covers that route.

Payroll gave you relief you could not claim. If HR has you down as married with a non-working spouse when your spouse works, PCB included spouse relief you are not entitled to. The same happens with TP1 reliefs you declared but cannot back with receipts: PCB went down during the year, and the return puts it back.

A worked example: Farah changes jobs in July

Farah is single and earns RM6,000 a month, RM72,000 for the year. EPF takes RM660 a month. In 2026 she spent RM2,500 on a new phone and her home internet, which counts towards the lifestyle relief.

Her real tax for the year is the same whatever happens with her job. Reliefs of RM15,850: the automatic RM9,000, EPF restricted to RM4,000, SOCSO and EIS restricted to RM350, and lifestyle RM2,500. Chargeable income RM56,150. The first RM50,000 costs RM1,500 and the RM6,150 above it sits in the 11 per cent band for RM676.50. Tax: RM2,176.50. No RM400 rebate, because she is well above RM35,000 chargeable.

If she stays with one employer all year, payroll deducts RM207.50 a month, RM2,490 in total. That is RM313.50 more than her real tax, because payroll never saw her SOCSO, EIS or lifestyle relief. Refund: RM313.50.

If she moves to a new company on 1 July for the same pay and skips TP3, the old employer deducts RM207.50 a month for six months, RM1,245. The new employer thinks her year is six months of salary, RM36,000. After EPF and the RM9,000 relief that looks like RM23,040 of chargeable income, which works out to RM241.20 of tax, and the RM400 rebate wipes that out completely. So her new payslips show PCB of RM0 for six months. It feels like a pay rise. It is not.

Notice what does not change: the tax. Skipping TP3 did not make Farah pay more tax. It made her pay later, in one lump, instead of RM207.50 a month. That is the whole answer to “PCB was deducted every month, so why do I owe?”. The PCB was real, it was just too small.

The lump has a deadline. LHDN says any shortfall between PCB and the tax payable is due by 30 April if you file on paper, or 15 May if you file on e-Filing, in the year after the year of assessment. For 2026 income, that is 15 May 2027. Miss it and a 10 per cent increase is added to what is unpaid, so Farah's RM931.50 would grow by RM93.15. If you genuinely cannot pay in one go, our guide to paying LHDN in instalments covers the options.

CP38 is not PCB

If a balance like Farah's is left unpaid, LHDN can send your employer a CP38, an instruction to deduct a fixed amount from your salary for a set number of months. LHDN's own FAQ puts it plainly: CP38 exists to clear tax owed over and above PCB. You can also ask LHDN to settle arrears this way.

While a CP38 is running you will see two tax deductions on your payslip at once, PCB for this year and CP38 for an earlier year. Keep them apart. CP38 shows on your EA form as D2, and it does not go into the PCB line on e-BE. Even LHDN's TP3 form asks for PCB “not including CP38”. Add it in and you are claiming credit for this year's tax with money that paid off last year's.

A CP38 is collection, not a new penalty. Before you accept the figure, check your MyTax balance to see which year it comes from, and whether you left any reliefs unclaimed that year. If you did, amending that return can legitimately shrink what you owe.

Can PCB be your final tax, so you do not have to file?

Sometimes. Since year of assessment 2014, LHDN lets PCB stand as your final tax, so you may choose not to submit a return, but only if every one of these is true for the year:

You had only one source of employment income, benefits in kind and housing included. PCB was deducted under LHDN's rules, or none was due because your pay was below the deductible level. You worked for the same employer all year. Your employer did not pay your tax for you. And you are not electing joint assessment with your spouse.

Even when you qualify, think twice. If PCB stands as your final tax, any refund you were owed stays with LHDN. Farah in the one-employer version qualifies, and taking the option would cost her RM313.50. For most people with any relief beyond the standard set, filing is the better deal. Our e-BE walkthrough shows every screen, and the PCB figure goes in the payments block from line D1 of your EA form.

What to do now

Three things, and the first one only takes a minute.

Changed jobs this year? Check whether your new employer has your TP3. Ask HR directly. If PCB on your new payslips looks suspiciously low compared with your old ones, that is the clue. Handing it in now fixes the remaining months.

Compare your payslip with the formula. Put your salary into the PCB calculator. If your payslip deducts much less, ask HR why before December, not after.

Keep your relief receipts. They are what turns an overshooting PCB into a refund. Keep them for seven years, the record-keeping period, whether or not you declare them on TP1.