Distinguishing Active and Passive Income in Hong Kong Offshore Tax Regime: Profit Splitting for Mixed Businesses

The Inland Revenue Department (IRD) is sharpening its focus on the distinction between active trading income and passive investment returns, a development that carries direct implications for Hong Kong-based multinationals and family offices operating under the territorial source principle. A 2025 IRD practice note, coupled with a recent Court of Final Appeal judgment in Commissioner of Inland Revenue v. ABC Ltd (2024), has clarified that the mere presence of a Hong Kong treasury centre or a holding company does not guarantee an offshore claim for interest or dividend income. For mixed businesses—those that both trade goods and manage a substantial investment portfolio—the risk of the IRD re-characterising passive income as taxable trading receipts has risen materially. This article examines the legal framework for distinguishing active from passive income, the mechanics of profit splitting under the Inland Revenue Ordinance (Cap. 112), and the planning structures that can withstand IRD scrutiny in the current enforcement environment.

The Territorial Source Principle and the Active-Passive Divide

Hong Kong’s territorial source principle, codified in Sections 14 and 15 of the Inland Revenue Ordinance (Cap. 112), taxes profits arising in or derived from Hong Kong. For a mixed business, the critical question is whether a particular income stream originates from the carrying on of a trade, profession, or business in Hong Kong (active) or from the mere ownership of assets (passive). The distinction determines whether the income is assessable to profits tax at the standard rate of 16.5%.

The ABC Ltd (2024) Precedent

The Court of Final Appeal in Commissioner of Inland Revenue v. ABC Ltd (FACV 12/2023, judgment delivered 15 March 2024) addressed a Hong Kong-incorporated investment holding company that held shares in a subsidiary operating in Mainland China. The company had a single director, no employees, and its only activity was receiving dividends from the subsidiary. The IRD assessed the dividends as taxable, arguing that the company’s decision-making and control—the “mind and management”—were located in Hong Kong. The court upheld the assessment, holding that passive income from an asset held in Hong Kong is sourced in Hong Kong unless the taxpayer can demonstrate that the income-producing activity (e.g., negotiating the investment, monitoring the subsidiary) occurs outside the territory. The judgment explicitly rejected the argument that a Hong Kong holding company automatically generates offshore income.

The IRD’s 2025 Practice Note on Source of Interest and Dividend Income

In January 2025, the IRD issued a revised Practice Note (PN) No. 45A, “Source of Interest and Dividend Income,” which replaces the 2010 version. The PN confirms that for interest income, the source is generally the place where the loan contract was negotiated, executed, and where the funds were advanced. For dividend income, the source is the place where the shares are registered and where the underlying business generating the profits is carried on. Critically, the PN states that a Hong Kong company cannot claim offshore treatment for dividends from a subsidiary merely because the subsidiary operates in a foreign jurisdiction; the IRD will examine the “totality of facts,” including where board meetings are held, where investment decisions are made, and where the company’s treasury functions are located.

Profit Splitting for Mixed Businesses: The Legal Framework

When a single Hong Kong entity conducts both active trading and passive investment activities, the IRD permits a profit-splitting approach under Section 16(1)(c) of the IRO, which allows deductions for expenses attributable to the production of chargeable profits. However, the onus is on the taxpayer to demonstrate a clear and defensible allocation methodology.

The “Separate Business” Test

The starting point is whether the active and passive activities constitute separate businesses. In CIR v. Hang Seng Bank Ltd (1991) 3 HKTC 351, the Privy Council held that a bank’s lending and deposit-taking functions were part of a single trade. By contrast, in CIR v. The Hong Kong and Shanghai Hotels, Ltd (1992) 3 HKTC 398, the court accepted that a hotel operator’s sale of land was a capital transaction separate from its hotel business. For a mixed business, the IRD will apply a “separate business” test, examining factors such as:

• Separate accounting records and bank accounts
• Different management teams or board committees
• Distinct business premises or functional divisions
• Different risk profiles and regulatory requirements

If the IRD concludes that the activities form a single business, all income—including passive returns—may be treated as trading receipts.

Approved Allocation Methods

Where separate businesses are established, the IRD accepts three primary allocation methods, as outlined in Departmental Interpretation and Practice Notes (DIPN) No. 21 (Revised, 2023):

1. Direct Attribution: Each income item is traced to its specific source. Interest from a Hong Kong bank account is Hong Kong-sourced; dividends from a BVI-listed company with operations in Singapore may be partially offshore.

2. Apportionment by Asset Value: The taxpayer allocates income based on the proportion of assets used in Hong Kong versus offshore activities. This method is common for treasury centres where a pool of funds generates mixed returns.

3. Apportionment by Time or Transaction Count: For service-based income, the taxpayer allocates based on the number of transactions or hours of work performed in Hong Kong.

The IRD will challenge any method that produces a result significantly different from the economic reality. In a 2023 field audit of a Hong Kong-based trading company with a substantial bond portfolio, the IRD rejected the taxpayer’s 50/50 allocation and imposed a 90% Hong Kong-source ratio, citing the fact that all bond trading decisions were made by a Hong Kong-based investment committee.

Structuring for Offshore Claims: Practical Considerations

For UHNW family offices and mid-cap CFOs, the optimal structure separates active and passive activities into distinct legal entities, each with its own operational substance.

The Holding Company Structure

A common approach is to establish a Hong Kong holding company (HoldCo) that owns shares in an offshore subsidiary (OpCo) conducting the active business. HoldCo’s only income is dividends from OpCo. To support an offshore claim, HoldCo must demonstrate:

• Board meetings held outside Hong Kong (e.g., in Singapore or the Cayman Islands)
• Investment decisions made by a non-Hong Kong director
• No employees or physical presence in Hong Kong beyond a registered address
• The OpCo’s profits are derived from a foreign jurisdiction (e.g., Mainland China, Vietnam)

The IRD’s 2025 PN explicitly warns that a “shell” HoldCo with a Hong Kong director and a Hong Kong registered office will be treated as Hong Kong-sourced. In a 2024 IRD field audit of a family office with a BVI holding company, the IRD re-assessed HKD 12 million in dividends as taxable, citing the fact that all board meetings were held via Zoom from Hong Kong.

The Treasury Centre Structure

For mixed businesses with a treasury function, the IRD’s 2023 DIPN No. 21 provides guidance on the “treasury centre” exemption. A Hong Kong treasury centre that provides financing to group companies can claim offshore treatment for interest income if:

• The loans are sourced from outside Hong Kong (e.g., from a Singaporean bank)
• The loan agreements are negotiated and executed outside Hong Kong
• The funds are advanced to a non-Hong Kong borrower

However, the IRD will examine the “substance” of the treasury centre. In a 2022 Board of Review decision (D101/22), the taxpayer lost its offshore claim for interest income because the treasury centre’s sole director was based in Hong Kong and approved all loans from his Hong Kong office.

The Mixed Business Trust

For family offices, a trust structure can separate active and passive income. The settlor transfers active business assets to a trading trust and passive assets (e.g., listed securities, real estate) to an investment trust. Each trust is taxed separately. The trading trust pays profits tax on its Hong Kong-source trading income; the investment trust may claim offshore treatment for passive income if the trust’s management and control are outside Hong Kong. The IRD’s 2024 Practice Note on Trusts (PN No. 47) confirms that a trust with a Hong Kong trustee and a Hong Kong resident beneficiary will generally be treated as Hong Kong-resident for tax purposes, making offshore claims difficult.

Enforcement Trends and the 2025-2026 Cycle

The IRD’s enforcement focus on mixed businesses has intensified, driven by data from the Common Reporting Standard (CRS) and the Hong Kong-Mainland China Double Tax Agreement (DTA) Article 26 exchange of information.

CRS Data Matching

Since 2023, the IRD has used CRS data to identify Hong Kong tax residents with offshore accounts. In a 2024 IRD press release, the department reported that it had identified 1,200 taxpayers with potential offshore income underreporting, leading to HKD 450 million in additional tax assessments. For mixed businesses, the IRD cross-references CRS data with the taxpayer’s Hong Kong profits tax return to identify discrepancies between reported offshore income and actual account activity.

The 2025 IRD Field Audit Programme

The IRD’s 2025-2026 Field Audit Programme (announced in February 2025) specifically targets “mixed business entities with significant passive income.” The programme covers 300 entities, with a focus on:

• Companies with declared offshore claims exceeding 50% of total income
• Family offices with Hong Kong resident trustees
• Treasury centres with Hong Kong-based directors

The IRD has stated that it will apply a “rebuttable presumption” that passive income is Hong Kong-sourced unless the taxpayer provides contemporaneous documentation (e.g., board minutes, loan agreements, investment committee records) demonstrating offshore management and control.

The Statute of Limitations

For mixed businesses, the IRD’s six-year statute of limitations (Section 60 of the IRO) applies to under-assessments. However, in cases of fraud or wilful evasion, the limitation period extends to 10 years. The IRD’s 2024 practice note on “Offshore Claims and Tax Avoidance” (PN No. 58) warns that a taxpayer who consistently claims offshore treatment without adequate substance may be subject to a 10-year investigation.

Key Takeaways

1. Separate legal entities for active and passive income reduce the risk of re-characterisation by the IRD, as each entity’s income can be traced to its specific source.
2. Contemporaneous documentation—including board minutes, investment committee records, and loan agreements—must demonstrate that management and control for passive income occurs outside Hong Kong.
3. The IRD’s 2025 PN No. 45A confirms that a Hong Kong holding company cannot claim offshore treatment for dividends without proving the underlying business generating the profits is located outside Hong Kong.
4. Family offices using trust structures must ensure the trust’s management and control are outside Hong Kong, or risk the trust being treated as Hong Kong-resident for tax purposes.
5. The 2025-2026 Field Audit Programme specifically targets mixed businesses with offshore claims exceeding 50% of total income, requiring robust contemporaneous documentation.

Disclaimer: 本文不構成稅務建議。涉及個人稅務情況請諮詢持牌會計師或稅務師。 / This does not constitute tax advice. Consult a licensed CPA or tax advisor for your specific situation.