Tata Power's $490 Million Arbitration Defeat: Why Singapore's Top Court Wouldn't Buy the "Biased Judges" Argument (2026 SGHC(I) 15)
Imagine losing a $490 million arbitration battle, and then walking into court to argue that the very arbitrators who ruled against you were secretly biased. That is exactly what one of India's largest industrial conglomerates tried, and failed, to do. On 26 August 2026, the Singapore International Commercial Court (“SICC”) handed down a judgment that every arbitration lawyer, in-house counsel, and law student in India should study line by line: The Tata Power Company Limited v Kleros Capital Partners Limited and other matters, [2026] SGHC(I) 15.
Three separate applications. One Indian power giant. Nearly ₹4,100 crore on the line. And a court that refused, at every turn, to give Tata Power a way out. Here is exactly what happened, why the court ruled the way it did, and what it teaches anyone building a career in arbitration and dispute resolution.
A Coal Deposit in Siberia, Two NDAs, and a Broken Promise
The story begins far from any courtroom. Kleros Capital Partners Limited, a British Virgin Islands investment advisory firm, claimed to have obtained knowledge of a massive coal deposit in Russia known as the Krutogorovo Deposit — estimated at roughly 1.1 billion tonnes. In August 2013, Kleros approached Tata Power as a potential co-investor. What followed were two Non-Disclosure Agreements (“NDAs”), signed in 2013 and 2014, meant to protect Kleros's confidential information while the parties explored a joint venture.
But the relationship broke down over a familiar corporate flashpoint: equity. Kleros wanted a stake between 26% and 60%. Tata Power was willing to offer only up to 10%. By 2016, the deal had unravelled, and Kleros accused Tata of taking the confidential information it had shared and using it to circumvent Kleros altogether.
Kleros dragged Tata Power to arbitration under the SIAC Rules in 2020. The Tribunal, in its first (“Liability”) Award, unanimously found that Tata Power had indeed breached the NDAs. Tata never challenged that finding. The real fight began at the next stage — the quantum of damages.
The ₹4,100 Crore Verdict Tata Power Could Not Accept
In the Quantum Award, the arbitral Tribunal split. The majority — Prof Lawrence Boo (presiding arbitrator) and Mr Stuart Isaacs KC — awarded Kleros approximately US$490 million for the “loss of chance” to invest in and profit from the coal project. Mr A K Ganguli SA, the arbitrator nominated by Tata Power itself, dissented.
A near half-a-billion-dollar award, decided 2:1, with Tata's own nominee on the losing side of the majority. For Tata Power, this was not a result it was prepared to simply accept. So it turned to the SICC — not once, but through three separate Originating Applications: OA 13, OA 24 and OA 25 of 2025.
Three Shields, One Goal: How Tata Power Tried to Escape the Award
Under Singapore's International Arbitration Act (“IAA”), a party can ask the court to set aside an arbitral award — but only in very narrow circumstances. Tata Power built its case around two broad grounds:
Infra petita / breach of natural justice — arguing that the Tribunal completely failed to decide three critical issues: causation, remoteness and mitigation.
Apparent bias — arguing that Prof Boo and Mr Isaacs KC, the two majority arbitrators, were not impartial, and that a fair-minded observer would suspect they could not decide the dispute fairly.
If either ground succeeded, the US$490 million Quantum Award could have been set aside, sent back for re-determination, or unwound entirely. This is exactly why the case matters so much: it is a rare, detailed illustration of how India's own courts (and arbitration lawyers everywhere) think about attacking — and defending — a large arbitral award.
Shield One: “The Tribunal Never Really Decided Our Case”
Section 24(b) of the IAA lets a court set aside an award where a breach of natural justice has occurred in connection with the award. But Singapore's courts, like Indian courts under Section 34 of the Arbitration and Conciliation Act, follow a policy of minimal curial intervention — meaning awards are read “generously and supportively,” and courts step in only in truly exceptional cases.
For an infra petita (literally, “below what was asked”) challenge to succeed, an applicant cannot simply show that the Tribunal's reasoning was weak, wrong, or incomplete. It must show something far harder:
the tribunal must have completely failed to consider the point — and that failure must be a “clear and virtually inescapable” inference, not just a plausible one.
Applying this test, the SICC (comprising S Mohan J, Anthony Besanko IJ and Anthony Meagher IJ) went through the Tribunal's Quantum Award in detail on causation, remoteness and mitigation, and found that the Majority had, in fact, applied its mind to each of these issues — even if Tata Power disagreed with the conclusions reached. Disagreeing with an outcome is not the same as proving the Tribunal never engaged with the argument at all. That distinction sank all three limbs of Tata's natural justice challenge.
Shield Two: “The Arbitrators Were Biased”
Tata Power's second ground was, in many ways, the more provocative one — a direct allegation that two senior, internationally respected arbitrators could not be trusted to decide fairly. The applicable test, as the court reaffirmed, is whether a reasonable, fair-minded observer, aware of all the relevant facts, would have a reasonable suspicion that a fair determination of the dispute was not possible.
Crucially, the court also had to grapple with a procedural trap: Tata Power's underlying challenge before the SIAC Court itself had already been found time-barred on almost every ground, except one it later dropped. The SICC did not need to resolve whether the same time-bar applied before it, because even assuming the challenge could be heard afresh, the bias argument still failed on the merits. The court held that a fair-minded observer, armed with all the facts Tata Power relied on, would not form a reasonable suspicion of bias against either Prof Boo or Mr Isaacs KC.
The Final Word: All Three Applications Dismissed, With Costs
In its conclusion, the SICC held that the Majority had not failed to decide any essential issue, that there was no breach of natural justice or of the agreed arbitral procedure, and that nothing before it gave rise to a reasonable suspicion of apparent bias. OA 13, OA 24 and OA 25 were dismissed in their entirety, with costs. Tata Power had already been separately ordered, in the underlying Quantum Award, to pay Kleros's legal costs and expenses of over S$8.28 million, on top of its own arbitration costs and the arbitration itself. The attempt to escape the award through the courts did not just fail — it added to the bill.
Why This Case Matters for Law Students and Lawyers in India
This judgment is not just about one Indian conglomerate's expensive coal deal gone wrong. It is a masterclass in three things that every arbitration practitioner in India needs to internalise, especially as Indian companies increasingly find themselves on both sides of SIAC, SICC, ICC and LCIA proceedings:
How high the bar really is to set aside an arbitral award for breach of natural justice — “we didn't like the reasoning” is never enough.
How narrowly “apparent bias” is interpreted by commercial courts, and how a fair-minded, evidence-based standard displaces mere suspicion or discomfort.
Why airtight NDA and confidentiality drafting at the very start of a deal — long before any dispute arises — is often the only real protection a party has, because once an award is made, the courts will rarely unwind it.
For law students and young lawyers building a career in this space, cases like this are the real syllabus. Arbitration is no longer a niche specialisation — it is one of the fastest-growing, highest-paying practice areas in Indian and cross-border legal work, precisely because so few lawyers are trained to actually read and argue awards, drafting instruments and setting-aside applications at this level of detail.
If this is the kind of work you want to be doing — advising on NDAs and arbitration clauses before a dispute even starts, or standing up in front of a tribunal or a court arguing over an award like this one — Into Legal World's Advanced Certificate Course in Arbitration & Dispute Resolution is built exactly for that career path, covering drafting, tribunal strategy, and the setting-aside jurisprudence that decided this very case.
Frequently Asked Questions
What is The Tata Power Company Limited v Kleros Capital Partners Limited case about?
It is a 2026 judgment of the Singapore International Commercial Court in which Tata Power tried to set aside a roughly US$490 million arbitral award made in favour of Kleros Capital Partners, arising from Tata's breach of two Non-Disclosure Agreements over a Russian coal deposit. The court dismissed all three of Tata Power's applications.
Why did Tata Power's challenge to the arbitration award fail?
Tata Power argued the Tribunal failed to decide causation, remoteness and mitigation (an infra petita breach of natural justice) and that the majority arbitrators showed apparent bias. The court found the Tribunal had, in fact, considered all three issues, and that no fair-minded observer would suspect bias on the facts relied upon.
What is an “infra petita” challenge in arbitration law?
An infra petita challenge argues that an arbitral tribunal completely failed to decide an issue that was properly submitted to it. Courts require a “clear and virtually inescapable” inference of total non-consideration — mere inadequate or incorrect reasoning is not enough to set aside an award.
What is the legal test for “apparent bias” of an arbitrator in Singapore?
The test is whether a reasonable, fair-minded and informed observer, aware of all the relevant facts, would have a reasonable suspicion or apprehension that a fair determination of the dispute was not possible. It requires a real, not merely fanciful, possibility of bias grounded in objective facts.
What can Indian law students and lawyers learn from this case?
That courts apply a policy of minimal curial intervention and almost never overturn arbitral awards on merits-based disagreement, that natural justice and bias challenges face very high evidentiary thresholds, and that careful NDA and arbitration clause drafting at the deal stage matters more than any post-award challenge.
Read the Full Judgment
The complete text of The Tata Power Company Limited v Kleros Capital Partners Limited and other matters, [2026] SGHC(I) 15, including the full findings on causation, remoteness, mitigation and apparent bias, is available for download below.
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Keywords: Tata Power v Kleros Capital Partners, SGHC(I) 15 2026, Singapore International Commercial Court arbitration case, setting aside arbitral award, apparent bias arbitrator Singapore, infra petita breach of natural justice, NDA breach coal deposit case, arbitration and dispute resolution course India, arbitration law career, how to set aside an arbitration award, minimal curial intervention.
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