Update: treaty access between Hong Kong and Singapore

Groups routing income across the Hong Kong–Singapore corridor face a recurring compliance question: does the structure actually qualify for the benefits the Comprehensive Avoidance of Double Taxation Agreement (the bilateral tax treaty between Hong Kong and Singapore, administered under the Inland Revenue Ordinance and its Singapore counterpart) is intended to provide? The answer turns less on the headline rates than on source, substance and the documentary record an entity can produce on demand.

Treaty access between Hong Kong and Singapore requires the claiming entity to demonstrate tax residence in the relevant jurisdiction and to satisfy the governing agreement's conditions on beneficial ownership and economic substance. Under Hong Kong's territorial system, the Inland Revenue Ordinance governs source and residence; Singapore's income tax legislation operates in parallel. Both administrations treat paper structures without genuine decision-making or activity as outside the treaty's scope.

This briefing sets out what is driving current scrutiny on this corridor, who is affected and the immediate steps a cross-border group should take.

What is driving scrutiny on this corridor now?

Two converging developments have raised the compliance temperature on the Hong Kong–Singapore corridor.

First, Hong Kong's foreign-sourced income exemption (FSIE) regime – which conditions the exemption of specified foreign-sourced income from profits tax on the recipient meeting economic-substance requirements – has been in force from 1 January 2023 and has since been amended to extend its scope. Groups that restructured holding entities to claim the FSIE exemption have, in doing so, placed their substance profile directly in front of the Inland Revenue Department. The same substance file is the foundation of any treaty-access claim.

Second, both Hong Kong and Singapore have committed to the OECD's Pillar Two global minimum tax. Hong Kong's minimum top-up tax and income inclusion rule apply for fiscal years beginning on or after 1 January 2025 to in-scope multinational enterprise groups with consolidated revenue at or above EUR 750 million. Singapore has moved on a comparable timeline. Groups that previously relied on rate arbitrage between the two jurisdictions now face a recalibrated environment in which substance and treaty access matter more, not less.

The practical consequence: withholding-tax positions on dividends, royalties and interest flowing between the two jurisdictions are receiving closer attention from in-house and external reviewers. A certificate of residence issued by one authority does not automatically satisfy the other's beneficial-ownership test.

Who is affected across the Hong Kong–Singapore corridor?

The issue touches several categories of cross-border structure we see regularly on our desk.

Asian holding groups that use a Singapore entity above a Hong Kong operating company – or the reverse – to access reduced withholding rates need to confirm that the intermediate entity has genuine management and control in its stated jurisdiction. A board meeting held once a year in the putative jurisdiction of residence, with directors based elsewhere, is unlikely to satisfy either administration on examination.

Family offices and private-investment vehicles that book income in one city while directing operations from the other face the same residence and substance test. Hong Kong's two-tier profits tax – 8.25% on the first HK$2,000,000 of assessable profits and 16.5% above that – remains attractive, but it applies to Hong Kong-sourced profits. If the source of a payment is contested, the treaty-access claim may fail before the rate question is even reached.

Treasury and financing companies interposing Singapore or Hong Kong entities in a lending chain should audit whether the interest-routing arrangement reflects genuine economic activity. Both jurisdictions' administrations look through conduit arrangements that lack commercial substance.

What should cross-border groups do now?

Three immediate steps are worth taking before the next payment or filing date.

First, review the tax-residence file. Each entity in the chain should hold current evidence of tax residence – a valid certificate, board-meeting records showing decisions made in the claimed jurisdiction, and payroll or office documentation consistent with the claimed substance level. A certificate of residence that predates recent restructuring may no longer reflect the position.

Second, map the source characterisation. Under Hong Kong's territorial system, the Inland Revenue Ordinance determines whether income is Hong Kong-sourced and therefore chargeable to profits tax. Where a payment flows from Hong Kong to Singapore – or vice versa – the source characterisation in Hong Kong affects which treaty article applies and whether a withholding-tax reduction is available at all. Groups that applied the old analysis before the FSIE regime came into force should re-run that characterisation now.

Third, document the beneficial-ownership position. The bilateral agreement's reduced rates for dividends, interest and royalties apply to the beneficial owner of the income, not the legal recipient. Where an entity passes income through to an ultimate parent or investor within a short cycle, the beneficial-ownership claim needs to be assessed honestly and supported in writing.

The sequence above describes the standard position. Your matter turns on the documents, the jurisdictions actually engaged and the order of steps – which is where the route is decided. For a structured assessment of your treaty-access position across Hong Kong and Singapore, write to us at info@lockhartyip.com.

Our Tax Positions practice covers source and residence analysis, FSIE substance reviews and cross-border treaty work across the principal corridors. Groups considering a Singapore exit or distribution should also refer to our note on tax review before a Singapore exit or distribution, and our guide on the equivalent UK exit and distribution review addresses related considerations for groups with a United Kingdom leg.

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This publication is general information and does not constitute legal advice. For advice on your situation, contact info@lockhartyip.com.