Tiger Global International II Holdings v. AAR: how the Supreme Court read GAAR over the India-Mauritius DTAA and reset the TRC's evidentiary force

The Supreme Court's judgment of 15 January 2026 in Tiger Global International II Holdings v. Authority for Advance Rulings — reported as 2026 INSC 60 — marks the operational commencement of the General Anti-Avoidance Rule in the Indian direct-tax architecture. A two-judge bench — Justice R. Mahadevan authoring the principal opinion, with Justice J.B. Pardiwala concurring — held that GAAR applies to any arrangement yielding a tax benefit on or after 1 April 2017, even where the underlying investment was made before that date in reliance on the India-Mauritius DTAA. The Tax Residency Certificate, the Court held, retains evidentiary relevance but no longer carries conclusive force where GAAR applies.

The judgment is doctrinally consequential on three connected propositions. The first is the temporal-scope proposition: GAAR's reach is anchored at the moment of tax-benefit realisation (the exit), not at the moment of investment, so that the 1 April 2017 commencement does not function as a grandfathering shield for pre-2017 investments whose exits occur after that date. The second is the evidentiary proposition on the TRC: the Azadi Bachao Andolan line — under which the TRC was, on the binding effect of CBDT Circular No. 789 (2000), conclusive proof of beneficial ownership and treaty residence — is substantially modified for GAAR purposes; the TRC remains a relevant document but does not foreclose the substantive enquiry under Chapter X-A. The third is the substantive-grandfathering proposition: the 2016 India-Mauritius Protocol's grandfathering of capital gains on shares acquired before 1 April 2017 protects only genuine investments; structures designed primarily for the tax benefit can be looked through under GAAR even where the share was acquired before the cut-off.

The statutory architecture before the Bench

The substantive question arose under the interplay between three statutory and treaty regimes.

The first is the India-Mauritius DTAA architecture. The treaty — originally concluded in 1983 — exempted capital gains on the alienation of shares from source-State taxation by reference to Article 13(4). The Azadi Bachao Andolan v. Union of India judgment of 7 October 2003 — by a two-judge bench of Justices Ruma Pal and B.N. Srikrishna — had upheld CBDT Circular No. 789 of 2000 directing assessing officers to treat a TRC issued by Mauritian authorities as sufficient evidence of treaty residence and beneficial ownership, and had reaffirmed treaty-based tax planning as legitimate in the absence of an express limitation-of-benefits clause. The architecture sustained — through the 2000s and into the early 2010s — the Mauritius FDI route that channelled substantial private-equity and venture-capital investment into India.

The second is the 2016 India-Mauritius Protocol. The Protocol — signed in May 2016 — substantively amended Article 13 to introduce source-based capital-gains taxation on shares acquired on or after 1 April 2017. Shares acquired before 1 April 2017 were grandfathered: capital gains on their disposal — even after 1 April 2017 — were preserved as exempt from source-State (Indian) taxation. The Protocol also introduced an LOB clause for the transitional period, with a substantive expenditure test (the well-known ₹27 lakh threshold) carving out shell entities from grandfathering protection. A further protocol of March 2024 introduced the BEPS Multilateral Instrument's Principal Purpose Test (PPT) into the bilateral treaty.

The third is the GAAR architecture in Chapter X-A of the Income-tax Act, 1961 — Sections 95 through 102, with effect from 1 April 2017. The architecture proceeds in three steps. Section 96 defines an "impermissible avoidance arrangement" — an arrangement, the main purpose of which is to obtain a tax benefit, that bears one or more of the listed characteristics (lack of commercial substance, abuse of the provisions of the Act, non-bona-fide character, manner not ordinarily employed for bona-fide purposes). Section 97 elaborates the lack-of-commercial-substance test through deeming provisions including round-trip financing, accommodating-party arrangements, and disregarded-party arrangements. Section 98 prescribes consequences — disregarding the arrangement, reallocating consequence, re-characterising income, treating the arrangement as not having occurred. Section 102 defines key terms including "tax benefit", "arrangement" and "party".

The substantive question on which the matter went to the Authority for Advance Rulings — and from the AAR ruling on writ to the Supreme Court — was the application of this composite architecture to a Mauritius-based PE-VC investment structure that had been set up before 1 April 2017 to invest in Indian portfolio companies, with the exits — and the resulting capital-gains realisation — occurring on or after 1 April 2017.

The factual matrix

The applicants — Tiger Global International II Holdings and connected applicants in the wider Tiger Global fund family — were Mauritius-incorporated entities through which the Tiger Global PE-VC fund had invested in shares of Indian portfolio companies. The investments had been made before 1 April 2017; the shares were therefore within the temporal sweep of the 2016 Protocol's grandfathering provision in respect of capital-gains taxation.

The applicants held TRCs issued by the Mauritian Financial Services Commission. The TRCs certified that the entities were tax residents of Mauritius for the relevant fiscal years. The applicants — proposing to exit their Indian portfolio investments through share transfers to identified counterparties — applied to the Authority for Advance Rulings for a ruling that the capital gains arising on the exits were exempt from Indian source taxation by virtue of the 2016 Protocol's grandfathering and the Azadi Bachao Andolan line on the TRC's conclusive force.

The Revenue's position — adopted at the AAR — was that the Mauritius entities lacked commercial substance; that the entities were interposed in the investment chain primarily to obtain the treaty benefit; and that GAAR applied to disregard the Mauritius interpose and tax the gains as if the underlying Tiger Global investing entities (in the United States and Cayman Islands) had directly held the Indian shares. The AAR ruled in the Revenue's favour. The applicants challenged the ruling by writ; the writ proceedings ultimately came to the Supreme Court.

The Court's reasoning

The Bench's reasoning unfolded along three connected limbs.

The temporal-scope limb. The Court held that GAAR's operative anchor is the moment of tax-benefit realisation, not the moment of investment. The text of Section 95 — read with Section 96's definition of "impermissible avoidance arrangement" and Section 98's consequences — operates on the "arrangement" as it exists at the moment when the tax benefit accrues. Where the arrangement was set up before 1 April 2017 but the tax benefit accrues after 1 April 2017 — through the disposal of shares yielding capital gains — GAAR's substantive application is engaged at the moment of accrual. The 1 April 2017 commencement does not function as a temporal shield for pre-2017 arrangements; the arrangement is examined as a whole at the moment of benefit accrual.

The methodological move places GAAR on the same temporal architecture as the substantive charging provisions of the Income-tax Act — which operate on income accrued or received in the relevant previous year, not on the investment that produced it. The reading is textually defensible and operationally consequential: it means that no pre-2017 PE-VC investment structure is automatically immunised by virtue of pre-dating GAAR commencement.

The TRC evidentiary limb. The Court held that the TRC retains relevance but is no longer conclusive for GAAR purposes. CBDT Circular No. 789 and the Azadi Bachao Andolan line had operated in a pre-GAAR architecture, where the substantive enquiry — into treaty residence and beneficial ownership — was either statutorily foreclosed or substantially constrained by the binding effect of the Circular. GAAR, the Court held, introduces a statutory mandate for the substantive enquiry that the Azadi Bachao Andolan line had narrowed. Where GAAR's threshold conditions are satisfied — primary purpose to obtain tax benefit, plus one of the four characteristics in Section 96 — the substantive enquiry into commercial substance proceeds notwithstanding the TRC.

The Court was careful not to overrule Azadi Bachao Andolan in terms. The TRC, the Bench held, remains relevant evidence of treaty residence — and, where GAAR is not engaged, the Azadi Bachao Andolan line on the TRC's evidentiary force continues to operate. The modification is to the TRC's conclusive character in the specific setting where the Revenue invokes GAAR. The qualification is significant: it preserves the Azadi Bachao Andolan architecture for ordinary treaty-residence assessments, while sub-ordinating the TRC to the substantive enquiry where GAAR's threshold is crossed.

The 2016 Protocol grandfathering limb. The Court held that the 2016 India-Mauritius Protocol's grandfathering of capital gains on pre-1 April 2017 share acquisitions protects only genuine investments; structures designed primarily for the tax benefit can be looked through under GAAR even where the underlying share was acquired before the cut-off. The grandfathering provision, the Bench reasoned, is a treaty-architectural rule — not a substantive immunity against the application of domestic anti-avoidance law. The Indian Revenue's right to invoke GAAR is preserved by the constitutional architecture under which treaty provisions operate within the limits of domestic law; Section 90 of the Income-tax Act — under which the treaty's provisions apply where more beneficial than the domestic law — does not, on the Bench's reading, foreclose the domestic GAAR regime.

The result, on the facts before the Bench, was that the Tiger Global Mauritius entities' commercial-substance defence — built around the Azadi Bachao Andolan line and the 2016 Protocol grandfathering — required substantive examination on the documentary record. The Bench's disposition was tailored to the specific applicants and the specific transactions before it, with the AAR's ruling preserved subject to the methodological framework that the judgment now supplies.

The doctrinal contribution

Tiger Global operationalises GAAR in the PE-VC exit context — the context for which the regime was substantively designed. The judgment's contribution is doctrinally significant in three ways.

First, it resolves — substantially in the Revenue's favour — the threshold temporal question that had clouded the GAAR architecture since its 1 April 2017 commencement. The temporal anchor at the moment of tax-benefit accrual means that the GAAR regime has, from 1 April 2017, applied to the substantial corpus of pre-2017 PE-VC structures whose exits have been crystallising over the post-2017 period. The judgment removes the temporal grandfathering argument as a defensive line; the substantive enquiry under GAAR's threshold conditions is the operative line.

Second, it substantially modifies the Azadi Bachao Andolan line on TRC-as-conclusive-evidence for GAAR purposes. The modification is doctrinally surgical — Azadi Bachao Andolan is not overruled, and the TRC retains evidentiary force outside the GAAR setting — but operationally consequential. PE-VC fund structures that have relied on the TRC-conclusive line for nearly two decades must now build a substantive commercial-substance defence on the documentary record: physical presence, decision-making locus, board composition, expense profile, asset base.

Third, it places the Indian GAAR regime on the same substantive footing as the OECD-BEPS Principal Purpose Test architecture. The 2024 India-Mauritius Protocol's incorporation of the PPT had operated as an additional treaty-architectural overlay; Tiger Global now signals that the domestic GAAR regime operates on its own footing, with the substantive substance-over-form discipline traveling from the McDowell and Vodafone lines into the Chapter X-A frame.

What the judgment did not decide

Three limits should be flagged.

First, the Bench did not articulate a categorical test for when a Mauritius entity has sufficient commercial substance to defeat the GAAR characterisation. The 2016 Protocol's expenditure threshold (₹27 lakh in the 12 months preceding) operates as a treaty-architectural test for the LOB; the GAAR commercial-substance enquiry is substantively broader and remains, on the Tiger Global framing, fact-specific. The boundary between the LOB threshold and the GAAR substance test is not foreclosed by the judgment.

Second, the judgment did not engage with the constitutional question on the retrospective reach of GAAR. The temporal-scope holding — anchoring GAAR at the moment of benefit accrual — has the practical effect of applying GAAR to pre-2017 investments, but the Bench framed the holding as a textual reading of Section 95 rather than a retrospective application. The constitutional question — whether a substantive anti-avoidance regime can be applied to pre-existing investment structures consistent with Article 14 and Article 19(1)(g) — was not before the Bench in those terms.

Third, the Bench did not engage with the impact of the March 2024 Protocol's Principal Purpose Test on the architecture. The Protocol's PPT operates at the treaty level; the relationship between the treaty-PPT and the domestic GAAR — including the interpretive sequencing where both potentially apply — remains for further engagement.

The doctrinal arc

The judgment sits in the substance-over-form line that runs through McDowell & Co. v. Commercial Tax Officer (1985) — the foundational Indian articulation of the colourable-device doctrine — through Union of India v. Azadi Bachao Andolan (2003) — which substantially narrowed the McDowell anti-avoidance approach — to Vodafone International Holdings B.V. v. Union of India (2012) — which articulated the "look-at" not "look-through" frame for cross-border indirect transfers.

The arc through the post-Vodafone legislative response is also material. The Finance Act 2012 introduced the retrospective amendments to Section 9(1)(i) that ultimately produced the Vodafone BIT arbitration and the Taxation Laws (Amendment) Act 2021 roll-back. The GAAR regime — first introduced through the Finance Act 2012 with effect deferred, refined through the Shome Committee process, and brought into force with effect from 1 April 2017 — is the statutory long-form response to the substantive concerns that had animated the Vodafone litigation.

Tiger Global is the first Supreme Court engagement with GAAR's operational architecture in the PE-VC exit context. The doctrinal repositioning of the TRC is the judgment's most substantial doctrinal move — recalibrating the Azadi Bachao Andolan line for the post-GAAR architecture. The substantive substance-over-form discipline that the McDowell concurrence had introduced in 1985 now operates, through GAAR, as a statutorily mandated enquiry rather than as a contested judicial doctrine.

What practitioners take from the judgment today

For PE-VC fund counsel advising on pre-2017 Mauritius investment structures with crystallising exits, the temporal-shield argument is no longer available. The substantive commercial-substance defence — on the documentary record — is the operative line. The defence architecture must be built on the substantive footprint of the Mauritius entity: physical presence, employee count, board composition (and the locus of board meetings), decision-making documentation, the expense profile relative to the investment-management function, the asset base, and the relationship between the Mauritius entity and the wider fund family. The traditional reliance on the TRC, paired with a thin Mauritius corporate structure, is acutely vulnerable.

For tax-litigation counsel responding to GAAR-driven reassessment notices, the Tiger Global framework supplies both the threshold and the defence. The Revenue's burden is to establish the threshold conditions in Section 96 — primary purpose to obtain tax benefit, plus one of the four listed characteristics. The defence is to contest the threshold conditions on the documentary record; where the threshold is satisfied, the secondary enquiry into commercial substance under Section 97 is the operative line. The CBDT's procedural architecture for GAAR — including the requirement for an approving panel under Section 144BA — supplies additional defensive structure.

For corporate clients with active PE-VC engagement, the structural conversation must extend beyond the post-2017 architecture. The first wave of GAAR-driven reassessment notices through May-June 2026 has signalled that the Revenue is now in a position to invoke Chapter X-A across the pre-2017 investment chain; the restructuring conversation that began with the 2016 Protocol now extends to the substantive substance of the existing Mauritius and Singapore vehicles. The advisory work from major firms through Q2 2026 — IBA, Trilegal, KPMG — has been consolidating the practical guidance on the substance buildup.

For constitutional and statutory-construction practitioners, the judgment is a significant moment in the line on substance over form in Indian tax law. The Tiger Global framework places the Chapter X-A architecture on a footing that allows the substantive substance-over-form discipline to operate without overruling the Azadi Bachao Andolan line in terms — a doctrinal architecture that respects the binding precedent of the earlier ruling while substantially modifying its operational reach.

Related editorial pieces

• Azadi Bachao Andolan: the TRC line and treaty-based tax planning
• Vodafone International Holdings v. Union of India: the look-at test and the indirect-transfer architecture
• McDowell & Co. v. Commercial Tax Officer: the colourable-device doctrine and the line on tax planning
• CIT v. Vatika Township: the presumption against retrospective tax legislation