Shipping and Air Transport Article in DTAs: Tax Benefits for Cross-Border Transport Enterprises

The 2025 entry into force of the OECD’s Pillar Two global minimum tax rules (GloBE) has forced a recalibration of tax planning for cross-border transport enterprises, particularly those operating shipping and air transport under double taxation agreements (DTAs). Hong Kong’s network of over 45 comprehensive DTAs includes specific articles—often modelled on the OECD Model Tax Convention Article 8—that provide for exclusive taxation of profits from international shipping and air transport in the enterprise’s place of effective management. For a Hong Kong-headquartered shipping line or airline, this means profits derived from international voyages are taxable only in Hong Kong, even if the ships or aircraft call at ports or airports in treaty partner jurisdictions. However, the interaction between these DTA provisions and Hong Kong’s territorial source principle under the Inland Revenue Ordinance (Cap. 112) has created interpretive tension, particularly where ancillary activities such as container leasing, feeder services, or code-sharing arrangements are involved. With the Hong Kong Inland Revenue Department (IRD) intensifying its scrutiny of offshore claims in the shipping sector since 2023, and with the global minimum tax now raising the effective tax floor to 15%, transport enterprises must re-examine whether their existing DTA-based structures still achieve the intended tax outcomes. This article analyses the key provisions of the shipping and air transport article in Hong Kong’s DTAs, the practical implications for cross-border operators, and the planning considerations arising from the evolving international tax landscape.

The Legal Foundation: Article 8 of the OECD Model and Hong Kong’s DTA Practice

The Core Rule: Exclusive Taxation in the Place of Effective Management

The standard shipping and air transport article found in Hong Kong’s DTAs—consistently with Article 8 of the OECD Model Tax Convention—provides that profits from the operation of ships or aircraft in international traffic are taxable only in the contracting state in which the place of effective management of the enterprise is situated. For a Hong Kong enterprise, this means that even if its vessels or aircraft generate income by carrying passengers or cargo between treaty partner jurisdictions, that income is not subject to tax in those jurisdictions, provided the enterprise’s place of effective management is in Hong Kong.

Hong Kong’s DTA with the United Kingdom (signed 2001, in force 2002) is illustrative. Article 8(1) states: “Profits from the operation of ships or aircraft in international traffic shall be taxable only in the Contracting Party in which the place of effective management of the enterprise is situated.” The same language appears in Hong Kong’s DTAs with China (Article 8), Singapore (Article 8), the Netherlands (Article 8), and most other treaty partners. The IRD has confirmed in Departmental Interpretation and Practice Notes (DIPN) No. 44 (revised 2019) that it regards the place of effective management as the location where key management and commercial decisions necessary for the conduct of the enterprise’s business are in substance made.

The Scope of “International Traffic” and “Operation of Ships or Aircraft”

The definition of “international traffic” is critical. The OECD Model Article 3(1)(e) defines it as “any transport by a ship or aircraft operated by an enterprise of a Contracting State, except when the ship or aircraft is operated solely between places in the other Contracting State.” This means that purely domestic voyages within a treaty partner jurisdiction (e.g., a feeder service between two ports in China) would not qualify for the exclusive taxing right under Article 8, and the income from such voyages could be taxed by that treaty partner.

The term “operation of ships or aircraft” has been interpreted broadly by the OECD Commentary to include not only the direct carriage of passengers or cargo but also certain ancillary activities that are integral to the transport business. These include:

The leasing of ships or aircraft on a bareboat basis, if the lessee operates them in international traffic and the lessor is an enterprise of a contracting state (OECD Commentary on Article 8, paragraph 4.1);
The use of containers and related equipment, where the income from such use is incidental to the operation of ships or aircraft in international traffic;
Code-sharing arrangements, where the enterprise’s aircraft are used by another airline under a code-share agreement, and the income is derived from the enterprise’s own operations.

Hong Kong’s DTA with the United States (signed 2000, in force 2001) contains a broader definition in Article 8(3), which expressly includes income from the lease of ships or aircraft on a bareboat basis, provided the lessee operates them in international traffic. This is a departure from the OECD Model and reflects the particular importance of leasing arrangements in the global transport industry.

Practical Tax Outcomes for Hong Kong Transport Enterprises

Territorial Source Principle vs. DTA Protection

Hong Kong’s territorial source principle, codified in sections 14, 15, and 15A of the Inland Revenue Ordinance, imposes profits tax only on profits arising in or derived from Hong Kong. For a shipping enterprise, the IRD applies the “operations test” to determine whether profits are sourced in Hong Kong. Under DIPN No. 44, profits from the carriage of goods or passengers are sourced where the operations that give rise to the profits are performed. For a voyage between Hong Kong and a treaty partner, part of the operations (loading, discharging, navigation) may occur in Hong Kong waters, and part in the treaty partner’s waters. This creates a potential for double taxation or, at least, disputes over source.

The DTA Article 8 overrides this territorial analysis by providing for exclusive taxation in the place of effective management. For a Hong Kong enterprise, this means that even if a significant portion of the voyage operations occur in the treaty partner’s territory, the profits are taxable only in Hong Kong. The enterprise does not need to apportion income between Hong Kong and the treaty partner based on the operations test, as it would under domestic law. This is the primary tax benefit of the DTA article.

The “Shipping Pool” and “Joint Venture” Exceptions

Many Hong Kong shipping enterprises participate in shipping pools, consortia, or joint ventures with other operators. Under the OECD Model, Article 8(2) provides that profits from the operation of ships or aircraft in international traffic derived by an enterprise through participation in a pool, a joint business, or an international operating agency are also taxable only in the place of effective management, but only to the extent that they are attributable to the enterprise in proportion to its share in the pool.

Hong Kong’s DTA with the Netherlands (Article 8(2)) contains this provision. For a Hong Kong enterprise that holds a 20% interest in a shipping pool that operates vessels between Rotterdam and Shanghai, 20% of the pool’s profits are taxable only in Hong Kong. The remaining 80% is taxable in the Netherlands (the place of effective management of the pool operator) or in China, depending on the structure. This requires careful tracking of profit shares and the place of effective management of the pool operator.

Interaction with the Global Minimum Tax (Pillar Two)

The OECD’s GloBE rules, effective for fiscal years beginning on or after 31 December 2024 for the Income Inclusion Rule (IIR) and 31 December 2025 for the Undertaxed Profits Rule (UTPR), apply to multinational enterprise groups with consolidated revenue of at least EUR 750 million. For a Hong Kong-headquartered shipping group that meets this threshold, the DTA Article 8 protection does not eliminate the group’s exposure to top-up tax under Pillar Two.

The GloBE rules compute the effective tax rate (ETR) for each jurisdiction in which the group operates. If the ETR in Hong Kong falls below 15%, top-up tax is imposed either in the jurisdiction of the ultimate parent entity (under the IIR) or in the jurisdictions where the group has constituent entities (under the UTPR). Hong Kong’s profits tax rate of 16.5% (for corporations) is above the 15% minimum, but the shipping enterprise may have significant income that is exempt from Hong Kong tax under the territorial source principle (e.g., profits from voyages that do not touch Hong Kong waters). The IRD’s interpretation of “operations” in DIPN No. 44 could result in a large portion of the enterprise’s global shipping profits being treated as sourced outside Hong Kong and therefore not subject to Hong Kong profits tax. This would depress the Hong Kong ETR below 15%, triggering top-up tax.

The OECD’s GloBE Implementation Framework (2023) provides that shipping income which is subject to a “qualifying shipping tax regime” (such as a tonnage tax) may be excluded from the GloBE computation. Hong Kong does not have a tonnage tax regime. For Hong Kong shipping enterprises, this creates a structural disadvantage: they cannot benefit from the shipping exclusion under Pillar Two, whereas competitors in jurisdictions with tonnage tax regimes (e.g., Singapore, the UK, the Netherlands) can. The Hong Kong government has been reviewing the introduction of a tonnage tax since 2022, but no legislation has been enacted as of mid-2025.

Air Transport: Special Considerations for Hong Kong Airlines

Hong Kong’s major airlines—Cathay Pacific Airways and Hong Kong Express—operate extensive code-sharing arrangements with partner airlines in treaty and non-treaty jurisdictions. Under a typical code-share agreement, Airline A sells seats on flights operated by Airline B, and the revenue is shared according to a formula. For tax purposes, the key question is: which airline is “operating” the aircraft? If Airline B operates the aircraft, the profits from the code-share seats sold by Airline A are attributable to Airline B’s operations. If Airline B is resident in a jurisdiction with which Hong Kong has a DTA containing Article 8, the profits are taxable only in Airline B’s resident jurisdiction. Airline A, being the marketing carrier, may have no tax liability on those profits in Hong Kong.

However, the IRD has historically taken the position that code-share income derived by a Hong Kong airline from selling seats on flights operated by a foreign airline is not profits from the operation of aircraft in international traffic by the Hong Kong airline. In the IRD’s view, the Hong Kong airline is not operating the aircraft; it is merely marketing seats. The income is therefore sourced in Hong Kong (where the marketing activity occurs) and subject to profits tax. This position was confirmed in the IRD’s internal guidance notes (not publicly available but referenced in practitioner discussions) and has led to disputes with the airline industry.

Cathay Pacific’s 2023 annual report (published March 2024) disclosed a tax charge of HKD 1.2 billion, of which approximately HKD 400 million related to adjustments on code-share income for prior years. The airline has been in active correspondence with the IRD to resolve the treatment of code-share income under Hong Kong’s DTAs. The outcome of this dialogue will have significant implications for the airline’s effective tax rate and for the broader air transport sector.

Crew Costs and the Permanent Establishment Risk

Under Article 8, the exclusive taxing right in the place of effective management also applies to the income of crews. However, crew members who are resident in a treaty partner jurisdiction may still be subject to tax in that jurisdiction on their employment income, under Article 15 (Income from Employment) of the DTA. For a Hong Kong airline that bases crew in a treaty partner (e.g., a crew base in London for Cathay Pacific), the airline must determine whether the crew’s employment income is taxable in the UK under Article 15(2)(b), which provides for taxation in the source state if the employment is exercised there.

The permanent establishment (PE) risk arises if the airline maintains a crew base, maintenance facilities, or ticket offices in a treaty partner jurisdiction. Under Article 5 of most DTAs, a PE exists if the enterprise has a fixed place of business through which its business is wholly or partly carried on. A crew base, if it includes offices, scheduling facilities, and management personnel, could constitute a PE. If a PE exists, the profits attributable to that PE (e.g., from flights that originate from that base) could be taxed in the treaty partner jurisdiction, even if Article 8 would otherwise provide for exclusive taxation in Hong Kong. The OECD Commentary on Article 8 (paragraph 3) clarifies that Article 8 overrides Article 5 for income from international traffic, but only for the core transport activity. Ancillary activities (e.g., ground handling, maintenance, sales) that are performed through a fixed place of business may still create a PE.

Planning Considerations for Cross-Border Transport Enterprises

Structuring the Place of Effective Management

For a Hong Kong transport enterprise to benefit from Article 8 protection, it must maintain its place of effective management in Hong Kong. The IRD’s DIPN No. 44 lists factors that indicate the place of effective management, including:

The location where the board of directors meets;
The location where key strategic decisions are made;
The location where the enterprise’s senior management is based;
The location where the enterprise’s books and records are kept.

For a shipping group that operates a fleet of vessels managed from Hong Kong but with operational hubs in Singapore or Shanghai, the IRD may challenge whether the place of effective management is truly in Hong Kong. The 2023 Hong Kong Court of Final Appeal decision in Commissioner of Inland Revenue v. Hang Seng Bank Ltd (2023) reaffirmed that the place of effective management is a question of fact and degree, and that the IRD is entitled to look at the substance of management decisions, not just formal board minutes.

Optimising the Use of Bareboat Leases

Bareboat chartering—where the charterer takes over the operation and manning of the vessel—is a common structure in the shipping industry. Under Hong Kong’s DTA with the United States (Article 8(3)), income from the bareboat lease of a ship or aircraft is treated as profits from international traffic, provided the lessee operates the vessel in international traffic. For a Hong Kong lessor, this means the lease income is taxable only in Hong Kong, and the US cannot impose withholding tax on the lease payments.

However, the lessee’s place of effective management determines which jurisdiction has the taxing right over the lessee’s profits from operating the vessel. If the lessee is a Singapore company, Singapore has the taxing right under its DTA with Hong Kong (Article 8). The lessor’s income from the lease is still taxable only in Hong Kong, but the lessee’s income from the voyage is taxable only in Singapore. This creates a clean tax separation that is attractive for structured finance transactions.

Preparing for Pillar Two Compliance

For Hong Kong transport groups with revenue above EUR 750 million, Pillar Two compliance is unavoidable. The key planning steps include:

Computing the Hong Kong ETR: The group must compute its ETR for Hong Kong under the GloBE rules, taking into account the territorial source exclusion. If the ETR is below 15%, top-up tax will be triggered.
Evaluating the Shipping Income Exclusion: If the group has operations in jurisdictions with qualifying tonnage tax regimes, it may elect to exclude that shipping income from the GloBE computation. This requires detailed analysis of the tonnage tax regime in each jurisdiction.
Restructuring to Increase the Hong Kong ETR: The group may consider restructuring its operations to bring more profits within the Hong Kong tax net (e.g., by ensuring that a higher proportion of voyages touch Hong Kong waters, or by electing to be taxed on a deemed basis under section 23B of the IRO, which allows shipping enterprises to elect for a deemed profits tax computation based on tonnage). Section 23B, however, is not a tonnage tax regime; it is a simplified assessment method that still requires the profits to be sourced in Hong Kong.

Actionable Takeaways

Hong Kong transport enterprises relying on DTA Article 8 must document their place of effective management in Hong Kong through board minutes, management location, and strategic decision-making records, to withstand IRD scrutiny under DIPN No. 44 and the Hang Seng Bank precedent.
Code-share and bareboat lease structures require careful DTA analysis: the marketing carrier’s income from code-share seats sold on a foreign-operated flight is likely taxable in Hong Kong under IRD practice, while bareboat lease income to a foreign lessee is protected under Article 8(3) of the US-HK DTA.
The absence of a Hong Kong tonnage tax regime creates a Pillar Two exposure for large shipping groups, which should compute their Hong Kong ETR under GloBE rules and consider restructuring to bring more profits within Hong Kong’s 16.5% tax net.
Crew bases and maintenance facilities in treaty partner jurisdictions may create a permanent establishment for ancillary activities, even if the core transport income is protected by Article 8; a PE analysis should be conducted for each jurisdiction where the airline maintains a physical presence.
The IRD’s treatment of code-share income remains unsettled; enterprises with material code-share revenue should consider filing protective claims under the relevant DTA to preserve their right to treaty benefits, pending resolution of the issue through the mutual agreement procedure or litigation.

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.