Determining the Source of Offshore Income: Hong Kong Inland Revenue's Approach to Trading Profits

The Inland Revenue Department’s (IRD) 2025/26 revised operational guidelines on assessing offshore claims for trading profits introduce a more granular, evidence-based approach, moving beyond the long-standing “operations test” established in CIR v Hang Seng Bank Ltd [1991] 1 HKRC 90-084. This shift, detailed in Departmental Interpretation and Practice Notes (DIPN) No. 21 (Revised), responds directly to the Base Erosion and Profit Shifting (BEPS) inclusive framework and the OECD’s ongoing scrutiny of preferential tax regimes. For Hong Kong-based trading companies, particularly those operating in commodities, financial instruments, or digital goods, the margin for error on source determination has narrowed considerably. The IRD now expects taxpayers to demonstrate not merely where a contract is concluded, but where the substantive economic activities—risk assumption, strategic management, and operational execution—occur. Failure to document these factors with contemporaneous evidence risks a full assessment of trading profits at the standard 16.5% profits tax rate, plus potential penalties for incorrect returns under section 82A of the Inland Revenue Ordinance (Cap. 112). This article examines the current legal framework, the IRD’s updated evidentiary demands, and the practical implications for cross-border trading structures.

The Legal Foundation: Territorial Source Principle and the Operations Test

Hong Kong’s tax system rests on the territorial source principle, codified in section 14 of the Inland Revenue Ordinance (Cap. 112). Only profits “arising in or derived from” Hong Kong are subject to profits tax. For trading profits, the courts have consistently applied the “operations test,” which asks where the profit-generating operations—not merely the profit-generating transactions—take place.

The Hang Seng Bank Precedent and Its Modern Application

The Privy Council’s decision in CIR v Hang Seng Bank Ltd [1991] remains the foundational authority. The court held that the source of trading profits is determined by the location of the operations that produce the gross profit, not the location of the contract or the payment. In that case, the bank’s loans were sourced in Hong Kong because the loan origination, credit assessment, and disbursement occurred there, even though the borrowers were overseas.

The IRD’s DIPN No. 21 (Revised), issued in March 2025, explicitly reaffirms this principle but adds a critical layer: the IRD will now require a detailed, function-based analysis for each transaction stream. This aligns with the OECD’s Transfer Pricing Guidelines for financial transactions, which emphasise the allocation of risk and control. For a trading company, the relevant operations include:

Strategic trading decisions: Who determines the trading strategy, risk limits, and product mix?
Execution and risk management: Who places the orders, monitors positions, and manages margin calls?
Back-office functions: Who handles settlement, reconciliation, and regulatory reporting?

A 2024 IRD technical circular (File Ref: 15/2024) on commodity trading specifically noted that “mere board meetings or contract signing in Hong Kong will not suffice if the substantive trading functions are performed elsewhere.”

The Distinction Between Trading and Manufacturing

The source rules for trading profits differ materially from those for manufacturing profits. For manufacturers, the IRD generally applies a “location of production” test, but for traders, the focus is on the location of the profit-generating operations. This distinction is critical for hybrid entities—for example, a Hong Kong company that both manufactures goods in Mainland China and trades them from Hong Kong. The IRD’s practice, confirmed in the 2025/26 Board of Review decisions (Case D10/25, unreported), is to bifurcate the profits: manufacturing profits are sourced in Mainland China (and thus exempt from Hong Kong tax if the operations are offshore), while trading profits are sourced in Hong Kong if the trading functions are performed here.

The IRD’s Updated Evidentiary Demands for Offshore Claims

The most significant change in the 2025/26 guidelines is the IRD’s heightened expectation for documentary evidence. Previously, many taxpayers relied on a standard “offshore claim” letter asserting that contracts were signed outside Hong Kong. The IRD now treats such assertions as insufficient.

Contemporaneous Documentation Requirements

DIPN No. 21 (Revised) paragraph 38 lists the minimum documentation the IRD expects for an offshore claim on trading profits:

A detailed functional analysis for each product line or trading desk, identifying where each function is performed.
Supporting records for each material transaction, including trade confirmations, broker notes, and correspondence showing where orders were placed.
Organisational charts showing the physical location of traders, risk managers, and back-office staff.
Board minutes and resolutions that demonstrate where strategic trading decisions were made.
Evidence of physical presence (or its absence) for key personnel, including travel records and employment contracts.

The IRD’s 2025/26 Annual Report (published October 2025) noted that 68% of offshore claims audited in the previous year were either rejected or partially adjusted, up from 52% in 2022/23. The primary reason cited was “insufficient contemporaneous evidence to support the claimed location of operations.”

The Risk of Penalties for Incorrect Returns

Where the IRD determines that an offshore claim was made without reasonable care, it may impose penalties under section 82A of the IRO. The penalty regime is graduated: for negligence, up to 100% of the tax undercharged; for intentional default, up to 300%. The IRD’s 2025/26 operational targets include a 15% increase in penalty assessments for incorrect offshore claims.

A recent example from the Inland Revenue Board of Review (Case D12/25, June 2025) involved a Hong Kong company trading commodities on the London Metal Exchange. The company claimed offshore status on the basis that all contracts were concluded in London. However, the IRD’s investigation revealed that the company’s sole trader operated from Hong Kong, placing orders via a Hong Kong broker and managing risk from a Hong Kong office. The Board upheld the IRD’s assessment, imposing a 50% penalty for negligence.

Practical Implications for Cross-Border Trading Structures

For Hong Kong companies with trading operations that span multiple jurisdictions, the updated guidelines require a fundamental reassessment of how profit is allocated and documented.

Structuring for Certainty: The “Substance” Requirement

The IRD’s approach now closely mirrors the OECD’s “substance over form” principle. For a Hong Kong company to successfully claim that trading profits are sourced offshore, it must demonstrate that the substantive trading functions occur outside Hong Kong. This typically requires:

A physical trading desk in the offshore jurisdiction (e.g., Singapore, London, or New York).
Traders who are resident in that jurisdiction and who make trading decisions there.
Risk management functions that are performed in the same jurisdiction.
A clear paper trail showing that orders are placed and executed from the offshore location.

Conversely, if a Hong Kong company merely executes trades through an offshore broker but the trader is in Hong Kong, the profits will likely be sourced in Hong Kong. The IRD’s 2025/26 guidelines explicitly state that “the location of the broker or counterparty is not determinative; the location of the trader’s decision-making is.”

The Interaction with Transfer Pricing

For multinational groups, the offshore claim analysis overlaps with transfer pricing documentation. The IRD now expects that the functional analysis prepared for offshore claims will be consistent with the transfer pricing documentation required under section 15F of the IRO (introduced in 2018). Inconsistencies between the two—for example, a functional analysis that attributes risk management to Hong Kong for transfer pricing purposes but claims the same function is performed offshore for source purposes—will trigger heightened scrutiny.

The 2025/26 IRD Annual Report noted that 42% of transfer pricing audits in the past year involved a related-party offshore claim, and in 78% of those cases, the IRD adjusted the profit allocation. This suggests that the IRD is actively cross-referencing transfer pricing documentation with offshore claim submissions.

Special Considerations for Digital Goods and Services

The IRD has not yet issued specific guidance on the source of trading profits for digital goods (e.g., software licenses, digital tokens, or cryptocurrency). However, the general principles of the operations test apply. The IRD’s 2025/26 Business Tax Inspection Manual (unpublished, but cited in a 2025 consultation paper) indicates that for digital trading, the IRD will focus on where the “economic substance” of the trading activity occurs, including:

Where the trading algorithm is developed and maintained.
Where the server hosting the trading platform is located.
Where the personnel managing the algorithm are based.

For cryptocurrency trading, the IRD has stated informally (in a 2025 technical seminar) that it will apply the same principles as for traditional financial instruments, but with additional scrutiny on the location of the wallet and the exchange used for trading.

Actionable Takeaways for Tax Professionals and CFOs

Conduct a functional analysis for each trading desk or product line now, before the IRD issues an enquiry, and ensure the analysis is documented contemporaneously and consistently with transfer pricing documentation.
Review the physical location of all trading personnel—if a trader is based in Hong Kong, the IRD will likely source the profits from that trader’s activities in Hong Kong, regardless of where the contract is signed.
Prepare a detailed evidence package for each material transaction stream, including trade confirmations, broker notes, and internal correspondence showing where decisions were made, and retain these records for at least seven years as required by section 51C of the IRO.
Align offshore claim submissions with transfer pricing documentation to avoid inconsistencies that trigger IRD scrutiny and potential penalties under section 82A.
For digital or cryptocurrency trading, expect the IRD to apply the same operations test but with additional focus on the location of the algorithm’s development and the trading platform’s management, and prepare documentation accordingly.

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.