Small Business Tax in Hong Kong Confirm the cited source.

Hong Kong levies tax on business profits through a single instrument -- the Profits Tax under the Inland Revenue Ordinance (Cap 112), administered by the Inland Revenue Department (IRD). There is no goods and services tax, no value-added tax, and no payroll tax. For small businesses the system is deliberately compact: one tax on one base, with straightforward deduction rules, a generous two-tiered rate structure, and an established e-filing portal. The sections below explain each component.

01How does the two-tiered Profits Tax rate work?

Since the year of assessment 2018/19, Hong Kong has applied a two-tiered Profits Tax rate. Incorporated companies pay 8.25% on the first HKD 2 million of assessable profits and 16.5% on any profits above that threshold. Unincorporated businesses -- sole proprietorships and partnerships -- pay 7.5% on the first HKD 2 million and 15% above. These rates are current for 2025/26 and 2026/27 with no structural change pending. For 2025/26 specifically, the government enacted a one-off 100% Profits Tax reduction capped at HKD 3,000 per business (legislated 13 May 2026, gazetted 22 May 2026); the reduction applies to the final-tax assessment only, not to provisional-tax instalments. Where a business has one or more connected entities -- generally defined as entities under common control exceeding 50% ownership or voting interest -- only one nominated entity in the group may access the lower first-tier rate in any given year of assessment; that election is irrevocable for that year.

02What is the territorial-source principle?

Hong Kong's Profits Tax is strictly territorial: only profits arising in or derived from Hong Kong are chargeable. As the IRD states on its territorial-source guidance page, "Profits sourced elsewhere are not subject to Hong Kong Profits Tax" regardless of whether they are remitted to Hong Kong. The IRD applies an "operations test" to determine source -- examiners identify the profit-producing transactions and the geographical location where those transactions occurred. For a trading business, source follows where purchase and sale contracts are negotiated, concluded, and executed. For a manufacturing business, source is where goods are made. For service income, source is where services are performed. This means a Hong Kong-registered company earning commissions from transactions entirely negotiated and concluded outside Hong Kong may legitimately claim those profits as offshore and not chargeable to Profits Tax. The IRD's Departmental Interpretation and Practice Note No. 31 sets out the detailed source-determination framework and is the primary reference for practitioners assessing offshore claims. Substantiation of offshore claims requires contemporaneous transaction records; the IRD may request documentation on audit.

03What can small businesses deduct?

The general deduction rule under the Inland Revenue Ordinance allows all outgoings and expenses incurred in the production of chargeable profits, provided they are revenue (not capital) in nature. Common deductible items include rent and rates, staff salaries and mandatory provident fund employer contributions, utilities, professional fees, bad debts written off, and business travel costs directly connected to Hong Kong-source income. Disallowed items include private or domestic expenditure, provisions that are not specific to an existing liability, capital expenditure, and remuneration paid to a sole proprietor or to a partner's spouse in excess of arm's-length rates.

Depreciation is handled through statutory capital allowances rather than accounting depreciation. Plant and machinery attract an initial allowance of 60% of capital cost in the year of acquisition, followed by annual allowances drawn from three prescribed rate pools: 10%, 20%, and 30% annually depending on asset class. Industrial buildings receive an initial allowance of 20% plus an annual allowance of 4%. Commercial buildings receive only a 4% annual allowance with no initial element. Building-refurbishment expenditure is deductible over five years at 20% per year. Environmental protection equipment qualifies for a 100% deduction in the year of expenditure. An enhanced R&D deduction applies: 300% on the first HKD 2 million of qualifying Type B research expenditure and 200% above that threshold. Charitable donations are deductible up to 35% of adjusted assessable profits.

04What is Provisional Profits Tax and how is it paid?

Because assessable profits for a year of assessment are not known until after the year closes, the IRD raises a provisional-tax assessment during the year based on the preceding year's profits. This provisional charge is payable on a scheduled instalment basis -- typically 75% on the initial demand and 25% approximately three months later. Once the actual profits for the year are ascertained through the filed Profits Tax Return, the IRD issues a final assessment and the provisional payments are credited against it. Any excess is refunded; any shortfall triggers a top-up demand. A business experiencing a substantial drop in profits relative to the prior year may apply to the IRD to reduce its provisional assessment before payment falls due, supporting cash flow management in down-trading periods.

05How does business registration work, and what does it cost?

Every person or entity carrying on a business in Hong Kong must obtain a Business Registration Certificate (BRC) from the IRD before commencing operations. This is a separate requirement from company incorporation with the Companies Registry. BRC certificates are available on a one-year or three-year basis. From 1 April 2026, the one-year BRC fee is HKD 2,350 (HKD 2,200 base registration fee plus the reinstated HKD 150 levy to the Protection of Wages on Insolvency Fund). The three-year certificate effective 1 April 2026 costs HKD 6,170. Businesses with average monthly turnover not exceeding HKD 10,000 (service businesses) or HKD 30,000 (other businesses) may apply for an exemption, subject to the condition that the entity is an unlimited company. Application, renewal, and amendment services are available electronically through the IRD's Business Registration Electronic Services portal under eTAX. The BRC must be displayed at the principal place of business.

06What are the filing and e-filing obligations?

The IRD issues Profits Tax Returns annually -- typically around April for companies with a 31 March year-end, with a schedule of extended due dates for other accounting periods. Incorporated businesses file on Form BIR 51; partnerships file on Form BIR 52; sole proprietors report business profits in Part 5 of the individual Tax Return (Form BIR 60). Businesses with annual gross income not exceeding HKD 2 million may omit certified financial statements from the return, though accounts must still be prepared, retained, and made available on request.

The IRD launched three dedicated e-filing portals under the eTAX platform in July 2025: the Business Tax Portal (BTP), the Tax Representative Portal (TRP), and the Individual Tax Portal (ITP). Profits Tax returns for the years of assessment 2022/23 through 2025/26 can be filed electronically through these portals. Entities in multinational enterprise groups subject to the global minimum tax regime are subject to mandatory e-filing from 2025/26 onwards. Voluntary e-filers receive a one-month extension of the standard filing deadline -- a meaningful cash-flow benefit given the provisional-tax instalment schedule. The portal also accepts electronic upload of supplementary forms and supporting financial statements. Small businesses consulting a qualified tax professional to navigate territorial-source analysis, two-tiered rate eligibility, or enhanced R&D deduction claims may further benefit from the TRP's representative-filing capability.

For a broader overview of doing business in Hong Kong, the Hong Kong country overview covers residency, corporate structure, and the wider tax landscape. The technicalities of territorial-source analysis, capital-allowance pool assignments, and offshore-claim substantiation are precisely the areas where guidance from a qualified tax professional adds measurable value.