Deductible business expenses in Malaysia: what Section 33 allows and Section 39 blocks

The two gates every expense has to pass

Section 33(1) is the opening door. It allows a deduction for outgoings and expenses wholly and exclusively incurred during the basis period in the production of gross income. Three words in that phrase do the work. Wholly and exclusively means the expense must have a single business purpose — not a mainly-business one with a personal side benefit. Incurred means the liability arose in the period, whether or not you have paid it yet. In the production of gross income means the spending has to be connected to earning this year's income, not to setting the business up or to building something lasting.

Section 39 is the closing door, and it wins. It lists categories of expenditure that are specifically prohibited even where they would otherwise satisfy Section 33. So the question is never just 'was this for the business' — it is 'was this for the business, and is it on the prohibited list'. An expense that fails either test is added back to accounting profit when you compute adjusted income.

What Section 33 comfortably covers

For an ordinary trading business, the allowable side is broad and should be claimed in full. Keeping these out of the computation because you are unsure is a far more common error than over-claiming:

• Staff costs — salaries, wages, bonuses, commissions, employer EPF and SOCSO, and the HRD Corp levy.
• Premises — rent, utilities, service charges, insurance and security for space actually used for the business.
• Repairs and maintenance that restore an asset to its previous condition (as opposed to improving or enlarging it, which is capital).
• Professional fees for the running of the business — audit, accounting, legal work on trading contracts, debt recovery.
• Advertising, marketing and promotion, including paid digital advertising.
• Interest on money borrowed and actually employed in producing the income.
• Specific bad debts written off, and a specific provision for named doubtful debts you can justify debtor by debtor.
• Business travel, delivery, courier, stock losses and consumables.

The add-back list: what Section 39 blocks

These are the items that appear most often in an SME tax computation as add-backs. Everything in the table was genuinely paid; none of it reduces tax.

The 50% entertainment rule and the exceptions that beat it

Entertainment is the single most misunderstood line in a Malaysian tax computation. The default under Section 39(1)(l) is that only half of entertainment expenditure is deductible — the client dinner, the hospitality, the golf. But the provision carries a list of exceptions that are deductible in full, and most businesses have more spending in those categories than they realise:

• Entertainment provided to your own employees — the annual dinner, team meals, family day — is fully deductible, unless it is incidental to entertaining outsiders at the same event.
• Entertainment provided by a business whose trade is providing entertainment (a restaurant, a caterer, an event company) as part of that trade.
• Promotional samples of your own products.
• Promotional gifts at approved trade fairs or industry exhibitions held outside Malaysia to promote exports.
• Promotional gifts within Malaysia consisting of articles that carry your business logo.
• Sponsorship of a cultural or sporting event open to the public that promotes the business.
• Entertainment that relates wholly to sales arising from the business.
• Leave passage is restricted separately and is largely blocked at the employer's level — treat it as non-deductible unless your adviser confirms the narrow local-passage exception applies.

Mixed use: apportion it, and write down how

The 'wholly and exclusively' wording is strict on its face, but in practice LHDN accepts a reasonable apportionment where an expense genuinely has a business and a private element — a phone line, a car, a home used partly as an office, a trip that combined a client meeting with a holiday. What it does not accept is an unexplained percentage applied after the fact.

The difference between a claim that survives an audit and one that does not is almost always the working. A phone bill split by itemised business calls, a car split by a logbook of business mileage, a home office split by the floor area of the room used and the days it was used — each of those is a defensible number. 'Sixty per cent, because that feels right' is not. Decide the basis in advance, apply it consistently across years, and keep the schedule with the accounts.

For a sole proprietor there is one more trap worth naming. Your own salary is not deductible, and neither are your own EPF, SOCSO or insurance contributions — you are the business, not its employee. Those go in your personal return as reliefs instead, which is why the sole proprietor and Sdn Bhd comparison turns as much on this point as on the headline tax rates.

Deductions small businesses routinely miss

• Secretarial and tax filing fees — deductible up to a combined RM15,000 per year of assessment under the relevant Income Tax Rules. Two fees most small companies pay every single year, frequently left unclaimed.
• Incorporation expenses — a company with capital not exceeding RM2.5 million may deduct its incorporation costs, which are otherwise capital and lost.
• Capital allowances on small-value assets — items such as tools, office equipment and furniture below the small-value threshold can be written off in full in the year of purchase rather than over several years.
• Further and double deductions — the Act and its subsidiary rules give enhanced deductions in defined cases, including the remuneration of disabled employees and certain approved training and childcare provision. These are rule-specific; check the current conditions before claiming.
• Pre-commencement spending, by contrast, is usually not deductible at all, because there was no business producing income when it was incurred. If you are about to start, the timing of your first invoice matters more than most founders expect.

Timing, interest and the larger-company rules

Deductions follow the basis period in which the expense was incurred, not the month the money left the bank. An accrued liability for work already done is deductible; a prepayment for next year's service belongs to next year. This is also why a year-end push to 'spend down' profit often fails — ordering something in December and receiving it in March moves the deduction, not the tax.

Interest deserves its own note. It is deductible only to the extent the borrowed money was actually employed in producing the income. Borrow in the company's name and lend it on interest-free to a director, and the corresponding interest is restricted. Larger companies have a second layer on top: the earnings-stripping rules restrict deductible interest on certain financial assistance between associated persons once interest expense passes the statutory threshold, by reference to a percentage of tax-EBITDA.

Keep the proof for seven years

Section 82 of the Income Tax Act requires business records to be kept for seven years from the end of the year of assessment. In an audit, the burden of showing that an expense was wholly and exclusively incurred for the business sits with you, not with LHDN — and a bank statement alone rarely discharges it. The documents that win are the ones that tie spending to a business purpose: the invoice addressed to the business, the contract, the mileage log, the board minute approving the director's fee, the training attendance list.

Where a deduction is genuinely arguable, the safest position is to claim it, document the basis, and disclose the treatment consistently. A reasonable, well-evidenced position that LHDN later disagrees with is an adjustment. An undocumented one looks like something else, and that is the difference between additional tax and additional tax with a penalty.

Important caveats

This guide describes the general framework for an ordinary trading business and uses the main provisions of the Income Tax Act 1967 — Sections 33, 34, 39 and 82 — as the reference points. Specific industries, incentivised activities, investment holding companies and partnerships have their own rules, and the monetary limits in the subsidiary Income Tax Rules are revised from time to time, usually at budget.

Treat the figures here as a planning guide, confirm the current limits and conditions against LHDN's published rules and Public Rulings at hasil.gov.my, and take advice before relying on any single treatment in a filed return. Use the calculator below to see how a change in adjusted income moves the tax, and read this alongside the guides on capital allowances, the sole proprietor versus Sdn Bhd comparison, and LHDN audits and appeals.