Side income tax Malaysia: do you declare it?

Do I need to declare side income in Malaysia?

Yes. All income from a source in Malaysia is taxable, no matter how you got it or who paid you. You must register a tax file and file a return if your annual employment income is more than RM34,001 after EPF (roughly RM2,850 a month), or if you have any business income at all, even if it is small, and even if the business made a loss. LHDN sets no minimum for business income.

Here is the part nobody tells you: filing is not the same as paying. After the automatic RM9,000 individual relief, your EPF, and the RM400 rebate for chargeable income up to RM35,000, plenty of people who file still owe zero tax. You declare so you are square with LHDN. You pay only if the maths says so. So "do I declare?" and "do I owe tax?" are two different questions: the first is almost always yes, the second is often no, or not much.

What counts as side income?

Side income is any money you earn outside your main salary. LHDN's own list of what it treats as a business is surprisingly wide and covers most modern side hustles. Per LHDN, a business includes online business (the digital economy), commission, tuition and lecturing, direct selling and stockist work, copywriting, YouTubers and bloggers, influencers and product ambassadors, e-hailing and delivery, and any trade, vocation, or profession you carry on for profit. The simple test: if you do it regularly to make money, LHDN treats it as a business, and the income is taxable. Examples that count:

• Weekend freelance design, coding, writing, or photography
• Selling on Shopee, Lazada, TikTok Shop, or Instagram
• Grab, foodpanda, Lalamove, or any e-hailing and delivery
• Insurance, property, unit-trust, or MLM commissions
• Tuition, coaching, or part-time lecturing
• Content creation: YouTube, TikTok, brand deals, even gifts you get for a post

A genuinely one-off, personal sale is different. If you sell your own used sofa or old phone once, that is not business income and you do not tax it. But the moment it becomes a regular thing you do for profit, it is a business in LHDN's eyes. When in doubt, declare it. It is cheaper than the alternative.

Does side income go on Form BE or Form B?

This is the fork that trips people up, so here is the clean rule. If your side income is a business (freelancing, selling, commissions, tuition, content, e-hailing), you file Form B, even though you also have a salary. If your only extra income is passive (rent from a property, dividends, or bank interest) and you run no business, you stay on Form BE and just declare it in the right income box.

LHDN spells this out directly. Their guidance says Form BE is for a "resident individual who does not carry on business," while Form B is for a "resident individual with business, employment and other income." Their own FAQ even answers the exact case: "Initially I only receive employment income, but started doing business later. Which form?" The answer is the B Form, for business and employment income together. So if you have a 9-to-5 and a side hustle that is a business, your whole tax life moves onto Form B. Your salary, your side income, and your reliefs all go on the one form. Not sure which one is you? Our Form B vs Form BE guide walks through it.

One thing does not change: your reliefs. The individual reliefs are identical on Form BE and Form B. Moving to Form B does not cost you any relief. It just adds a section for your business income and expenses.

How much tax will I pay on my side income?

Your side income stacks on top of your salary and is taxed at your marginal rate, the rate of the band it lands in. It is not taxed at some scary flat rate, and it is not taxed from the first ringgit. Here is a real example. Aiman is salaried, earning RM60,000 a year. On weekends he does freelance design and clears RM12,000 for the year after his costs. To keep the maths clear we give him only the automatic RM9,000 individual relief and RM4,000 of EPF (real reliefs would lower both numbers). All figures are computed the way the MyTaxMate engine does it, on the YA 2025 rates (identical for YA 2026).

So the RM12,000 of side income added RM1,170 in tax. That is an effective rate of about 9.75% on the side money, not 24%, not 30%. Why? Because it sits in his 6% and 11% bands: the slice from RM47,000 to RM50,000 (RM3,000) is taxed at 6% = RM180, and the slice from RM50,000 to RM59,000 (RM9,000) is taxed at 11% = RM990, for RM1,170 in total. That is the whole point of a progressive system. Your side income is taxed at the band it lands in, on top of your salary, and nothing more. And if Aiman kept his receipts and claimed his laptop, software, and other costs properly, his taxable side figure (and his tax) would be lower still.

Can I deduct expenses from my side income?

Yes, if it is business income. This is the big advantage of declaring properly. You are taxed on profit, not on what hit your bank account. So you subtract the real costs of earning that side income first: equipment, software subscriptions, the cut the platform takes, stock you bought to resell, a share of your phone and internet, travel to a job. What is left is what gets taxed.

The catch is records. LHDN does not ask for your receipts when you file, but you must keep them for seven years in case they check. No receipt, no deduction. Our freelancer tax guide and sole proprietor guide go deeper on exactly what you can claim.

What if my side income keeps growing?

If your side business grows into a real chunk of your income, two things tend to happen. First, LHDN may put you on CP500, a bi-monthly instalment scheme that asks you to pre-pay tax on your non-salary income through the year, a bit like how PCB works for salaries. If the CP500 estimate looks too high, you can appeal it with CP502 by 30 June. Second, you might consider registering a sole proprietorship with SSM. You do not need an SSM registration to declare side income or to claim expenses, but registering can make your record-keeping cleaner as you scale. Either way, the tax treatment is the same 0% to 30% scale. There is no special, higher "side hustle tax."

What happens if I don't declare side income?

It is a risk that is getting harder to take. LHDN increasingly sees the money anyway, through bank data, e-invoice records, and reporting from platforms. If they find undeclared income, they can backdate the tax and add a penalty on top, which can run well above the tax you originally owed. Our LHDN fines guide lays out the actual penalty figures.

The good news: if you have missed declaring side income in past years, you are usually better off coming forward and filing or amending than waiting to be found. LHDN has a process to correct an under-declaration (the Amended Return Form), and voluntary honesty is treated far more kindly than a discovered omission.

When is the deadline?

If your side income is a business, you are on Form B: the deadline is 30 June, with a grace period to 15 July if you file online through e-Filing (which is now the only way). If you have no business income and only passive extras, you are on Form BE: 30 April, with e-Filing grace to 15 May. Miss it and the late penalties stack up, so file even if you think you owe nothing.