Mauritius Tax Residency Under Fire: Lessons from the Tiger Global Ruling

The most immediate, and perhaps most consequential, departure concerns the treatment of the TRC. Earlier decisions like Azadi Bachao Andolan and Vodafone had treated a TRC as sufficient proof of residence. Tiger Global breaks firmly with that approach. The Court held that a TRC remains necessary but is no longer sufficient: it only establishes eligibility to claim treaty benefits, not an automatic right to them. The ruling gives the impression that Indian authorities are entitled to look beyond the certificate to assess whether the taxpayer is genuinely liable to tax in Mauritius and whether it actually conducts meaningful, independent controlled economic activity there.

The Court accepted findings that real decision‑making for the Tiger Global entities occurred in the United States, not Mauritius. Although the entities were incorporated in Mauritius and held Global Business Licences, strategic control and approval powers were exercised outside Mauritius. Foreign signatories operated bank accounts, key approvals required U.S. oversight, and board meetings in Mauritius appreared administrative rather than substantive. Together, these facts made clear that effective control did not sit in Mauritius. The message is unambiguous: incorporation and licensing are no longer enough. POEM - where real strategic and commercial decisions are made, now plays a decisive role in determining treaty access. For Mauritius, this aligns with domestic expectations under ESR, FSC governance standards, and the global shift towards authentic mind‑and‑management in the jurisdiction.

The Indian authorities have not challenged the tax residency of the company in Mauritius but directly applied the Limitation on Benefits (LoB) rules to deny treaty benefits without even ascertaining the rules embedded in Article 27A but by applying their local GAAR.

The Court also drew a firm line between direct and indirect transfers of capital assets. The taxpayer had argued that gains from selling shares in a Singapore holding company should fall under Article 13(4) of the India–Mauritius treaty. The Court disagreed. It held that the treaty does not shield indirect transfers of Indian assets even when routed through non‑Mauritian entities. With Explanation 5 to Section 9 of the Income Tax Act in play, India retains the authority to tax indirect transfers based on underlying value derived from Indian assets. This clarifies the treaty's boundaries and exposes the fragility of multi‑layer Mauritius–Singapore investment structures that previously relied on broader interpretations of Article 13.

The judgment’s treatment of the General Anti‑Avoidance Rule (GAAR) is another turning point. While investments made before 1 April 2017 are generally grandfathered, the Court clarified that GAAR applies to any tax benefit arising on or after that date. GAAR focuses on arrangements not merely the timing of investments. Long‑standing structures can still be examined if their dominant purpose is tax avoidance. Here, the capital gains arose in 2018, placing the arrangement squarely within GAAR’s timeline. Finding that the structure lacked commercial substance and was primarily designed for tax benefits, the Court upheld GAAR’s application and denied treaty protection. This cements GAAR as the overriding statutory tool capable that may override treaty provisions where abuse is suspected.

The Court also looked beyond the Mauritian entities to the broader group‑level structure and foreign influence. The companies formed part of a larger U.S.‑controlled investment architecture. Although common in global fund management, the concentration of strategic control outside Mauritius was deemed incompatible with Mauritian residence claims. This signals a move toward holistic, group‑level analysis rather than evaluating entities in isolation, a challenging shift for multinational funds relying on Mauritius for treaty access.

Finally, the ruling reinforces that compliance with Mauritian domestic requirements does not bind Indian tax authorities. A Global Business Licence or adherence to local regulation does not automatically guarantee treaty benefits. India maintains the sovereign right to determine whether a taxpayer is truly a resident for treaty purposes, holds genuine commercial substance, and seeks treaty protection in good faith. This materially limits the comfort that Mauritius’ regulatory status once provided.

In a nutshell, Tiger Global fundamentally reshapes the tax landscape for Mauritius‑based investment structures. It confirms that substance outweighs form, that POEM and GAAR are central to treaty eligibility, and that indirect transfers fall outside the treaty’s protective scope. Mauritius residency—once seen as a near‑automatic gateway to treaty benefits—must now be backed by demonstrable economic presence, independent decision‑making, and genuine control located within Mauritius.

Opinion: The Impact on Existing Mauritius Structures

The impact of the Tiger Global ruling on existing Mauritius structures is likely to be profound and and requires urgent reassessment. For two decades, Mauritius‑based entities relied on a stable triangulation of incorporation, TRCs and regulatory compliance to support their tax residency claims. This framework was sufficient to secure treaty benefits, particularly under the pre‑2016 version of the India–Mauritius DTAA. The Supreme Court’s new stance fundamentally tightens the standard, creating a landscape in which past assumptions no longer hold.

Existing structures that were historically built on minimal substance, often with one or two local directors, outsourced administration and limited on‑ground activity, now face material risk when dealing with India. The mere completion of annual requirements or the nominal presence of a local corporate office does not protect such vehicles from scrutiny. If their effective control lies in a foreign jurisdiction, they may be deemed non‑resident for Indian treaty purposes even if Mauritius continues to regard them as residents under domestic law. This divergence creates significant uncertainty, particularly for funds with long‑standing investment holding arrangements.

Moreover, GAAR’s decisive role means that grandfathering of pre‑2017 investments will no longer shield structures that lack genuine commercial substance.  Many Mauritius entities that invested in India before the 2017 amendment believed that their future exits would be protected from Indian taxation. The Supreme Court has now made it clear that gains arising after 1 April 2017 may still fall under GAAR if the surrounding arrangement appears tax‑motivated. This places a wide range of legacy structures in jeopardy especially those with multi‑layered holding arrangements spanning Mauritius, Singapore and other jurisdictions.

Groups with shared management platforms outside Mauritius must also re‑evaluate their governance frameworks. The ruling highlights that group‑level strategic influence is a relevant factor in determining residency and beneficial ownership. Therefore, the historical practice of centralised offshore decision‑making, common in private equity, venture capital and multinational corporate groups, could now weaken the treaty eligibility if the Mauritian entity is unable to demonstrate autonomy and local authority.

Ultimately, the ruling signals a clear policy direction; treaty protection is no longer a matter of form and Mauritius residency is no longer presumed. Every Mauritius structure interacting with India must now confront the question of whether its substance is genuine, defensible and appropriately documented.

Entities that previously operated with minimal presence will need to consider strengthening their footprint, empowering local directors, increasing operational expenditure and establishing clear documentation of independent decision‑making. The alternative is exposure to Indian taxation under Section 9, full denial of treaty benefits and the possibility of retrospective scrutiny under GAAR.

The Tiger Global ruling does not close the door on Mauritius - but it requires significantly higher levels of discipline, governance, substance and credibility than before. Another question to be asked is whether Mauritius should revamp the definition of tax residency for companies as the current TRC under this ruling does not ‘validate’ the tax residency as per tax treaties.