Two judgments, twenty-three years apart, mark the beginning and the end of an era in how foreign investors held Indian assets. In 2003 the Supreme Court held that a Mauritius tax-residency certificate was enough to claim treaty benefits, and the age of the holding certificate opened. In January 2026 the same court held that substance, not the certificate, now governs, and that age closed. Between them runs the single shift an incoming investor most needs to understand: India moved from testing the paper to testing the presence behind it.
What Azadi Bachao settled
The 2003 case arose from a challenge to a tax circular. The Central Board of Direct Taxes had instructed its officers to accept a Mauritius residence certificate as proof of residence, and so of entitlement to the India–Mauritius treaty's capital-gains exemption. The Supreme Court upheld the circular. It held that the certificate was conclusive proof of residence, that the treaty's benefits followed, and that an arrangement was not to be denied them merely because it had been chosen for the treaty. Treaty shopping, the court reasoned, was for the treaty partners to address, not for the revenue to disallow case by case. For two decades that ruling underwrote a now-familiar structure: hold the Indian investment through a Mauritius company, present the certificate, and take the exemption on exit.
What Tiger Global decided
Tiger Global, a group of Mauritius entities, had built a stake in Flipkart and sold it to Walmart in 2018 for more than two billion dollars. It claimed the treaty exemption on the gain. The Authority for Advance Rulings refused in 2020, finding the Mauritius entities were intermediaries in a structure directed from the United States. The Delhi High Court reversed in 2024, holding the gain fell within the treaty's grandfathering of shares acquired before April 2017. In January 2026 the Supreme Court set that aside. It held that the shares sold were of a Singapore company deriving their value from Indian assets, that Mauritius residence did not by itself carry the exemption, and that the general anti-avoidance rule could override the grandfathering where the structure lacked substance. The certificate, conclusive in 2003, was no longer the answer.
Where the exposure sat
The exposure was not the Mauritius route. That route was lawful, widely used, and expressly protected for older investments by the treaty itself. The exposure was the thinness behind it: a holding chain whose residence was real on paper and light in substance, relied upon as a substitute for presence rather than as evidence of it. The certificate proved where the entity was registered. It could not prove where the decisions were made. When the test shifted from the first question to the second, a structure built only to answer the first had nothing further to show.
Could it have been avoided?
In part. Genuine substance in the holding jurisdiction, meaning decision-making, management and a commercial reason to be there beyond the treaty, would have met the test the court applied, and many well-advised structures already carried it. What could not be avoided was the direction. India had signalled the shift for years: the 2016 protocol to the Mauritius treaty ended the capital-gains exemption for new investments, the grandfathering line was drawn at April 2017, and the general anti-avoidance rule had been enacted precisely to reach arrangements without substance. An investor reading the direction had a decade's notice that the certificate alone was a closing position.
The lessons
- Substance is the asset, not the certificate. A residence certificate records registration; it does not establish the presence that treaty benefits now require. Build the holding jurisdiction around real decision-making, and keep the evidence of it.
- Grandfathering is protection, not a guarantee. A grandfathered position can still be tested where the structure behind it lacks substance. Treat it as one defence among several, not the whole of the case.
- Read the direction, not only the rule of the day. India signalled this shift across two decades. The investor who tracked the direction adjusted early; the one who relied on the position as it stood in 2003 held it too long.
- Document the commercial rationale at entry. The reason for the holding jurisdiction, recorded when the structure is built, is part of the substance that defends it later.
The arc
The harder question this case raises is whether a jurisdiction that reopened a long-settled position can be relied upon. Read against the record, it can. India did not change the rule overnight or in secret. It renegotiated the treaty in 2016, drew a clear grandfathering line, legislated its anti-avoidance rule in advance, and resolved the question through its highest court. The shift it made, from form to substance, is the same one the developed world made through the OECD's base-erosion programme, the treaty principal-purpose test, and the general anti-avoidance rules of the United Kingdom and the European Union. A jurisdiction is judged less by whether it tightens a standard than by how clearly it signals the change. On that test the signal here was long, legible, and in step with the international mainstream.
Frequently asked questions
Does Azadi Bachao still protect a treaty-shopping structure?
Only so far as substance supports it. Azadi Bachao held that a treaty benefit could not be refused merely because the structure was chosen for the treaty, and that much stands. What has changed is that the benefit now also requires genuine substance, and an anti-avoidance rule can deny it where substance is absent. The 2003 principle survives; the 2003 sufficiency of a certificate does not.
Is treaty grandfathering still worth anything?
Yes, but it is not absolute. Grandfathering still protects qualifying older investments and remains a valuable position. Tiger Global shows it can be tested where the structure behind it lacks substance. Identify and document the basis for a grandfathered position rather than assuming it is beyond question.
Does a Mauritius or Singapore residence certificate still secure the exemption?
Not on its own. The certificate evidences residence; it no longer settles entitlement. Treaty benefits now follow genuine presence and decision-making in the holding jurisdiction. The jurisdiction-choice piece and the structuring pillar set out what that presence looks like in practice.
Is this shift unique to India?
No. The move from form to substance is the international norm. The OECD's principal-purpose test, the United States' economic-substance doctrine, and the anti-avoidance rules of the United Kingdom and European Union all deny treaty or tax benefits to arrangements without substance. India's ruling places it within that mainstream rather than apart from it.
Sources and authorities
- Union of India v Azadi Bachao Andolan (2003) 263 ITR 706 (SC), 7 October 2003; CBDT Circular No. 789 (13 April 2000) — Mauritius residence certificate as proof of residence for treaty benefits.
- Tiger Global International entities (Flipkart–Walmart exit) — Authority for Advance Rulings (2020, benefits denied); Delhi High Court (August 2024, grandfathering under Article 13(3A) of the India–Mauritius DTAA); Supreme Court (15 January 2026, set aside; substance over residence; GAAR may override grandfathering).
- India–Mauritius DTAA and the 2016 Protocol — capital-gains exemption ended for shares acquired on or after 1 April 2017; grandfathering of earlier acquisitions.
- General anti-avoidance rule, Income-tax Act 1961, Chapter X-A; OECD Multilateral Instrument principal-purpose test (comparative).
- Companion analyses: the case-study hub; the synthesis hub; the structuring pillar; the jurisdiction-choice piece; the piece on how India reset its treaty protection.
This article is general information and not legal or tax advice. Laws and case-law develop; obtain advice on your specific circumstances before acting.