Can Courts Modify an Arbitral Award? The Supreme Court Draws a Clear Line

The Question Courts Had Avoided for Years

For nearly three decades after the Arbitration and Conciliation Act came into force in 1996, Indian courts operated in an uneasy grey zone. While Sections 34 and 37 of the Act gave courts limited powers to set aside and appeal arbitral awards, they said nothing about modifying them. Yet courts had, on occasion, done precisely that: tweaking interest rates, separating out severable portions, adjusting figures: without any clear statutory basis.

Different High Courts took different positions. Some held that modification was simply impermissible; that the court's only options were to set aside or uphold. Others allowed selective modifications on grounds of reasonableness or justice. The Supreme Court itself had sent mixed signals across various Division Bench decisions. The result was uncertainty: and a growing body of conflicting precedents that made outcome prediction in arbitration-related court proceedings genuinely difficult.

That uncertainty has now been resolved. In Gayatri Balasamy v. M/s ISG Novasoft Technologies Ltd., a Constitution Bench of five judges delivered a 4:1 majority opinion that definitively answers the question: and does so in a way that both protects arbitral finality and identifies the narrow channels through which modification remains available.

What the Majority Held

The majority opinion begins from first principles. The Arbitration and Conciliation Act is a self-contained code. Its philosophy is minimal court intervention. Section 34, which allows a court to set aside an award, is in the nature of a curial review: not an appellate power. It does not permit the court to substitute its view on the merits for that of the arbitrator. Section 37, which governs appeals from orders made under Section 34, is even more restricted.

The court held that neither Section 34 nor Section 37 confers a power to modify an arbitral award as a general proposition. A court sitting in challenge to an award is not an appellate court. It cannot re-examine evidence, re-assess credibility, or substitute a different conclusion. To allow modification would be to import an appellate jurisdiction that Parliament deliberately chose not to create.

This holding is significant because it forecloses a creative argument that had gained some traction: that if a court has the power to set aside, it must also have the lesser power to modify. The majority rejected this reasoning explicitly. The power to set aside entirely is not a power that necessarily includes partial modification; the statutory scheme treats them as distinct, and modification is not listed as a remedy under Section 34.

"Modification of an arbitral award by a court would amount to substitution of the tribunal's decision with the court's own view on the merits, which is antithetical to the scheme and philosophy of the Arbitration and Conciliation Act."

The Four Permitted Exceptions

The majority opinion does not slam the door entirely. It identifies four narrow situations where a court may intervene short of full set-aside:

1. Severable Portions of an Award

Where an award is partially tainted: by patent illegality, public policy violation, or breach of natural justice: and the tainted portion is genuinely severable from the remainder, a court may set aside that portion alone and allow the untainted remainder to stand. This is not modification in the true sense; it is a targeted set-aside that preserves what can be preserved. The court emphasised that severability must be real, not constructed: the remaining portion must be capable of standing independently without the removed portion changing its character or effect.

2. Clerical and Arithmetical Errors

Section 33 of the Act already permits an arbitral tribunal to correct clerical errors in its own award. The majority held that courts also retain a limited power to correct obvious arithmetical mistakes or clerical errors that are plainly apparent on the face of the award: errors of the kind where there is no dispute about what the tribunal intended, only about what it wrote. This power is narrow and cannot be used to revisit substantive findings or recalculate damages.

3. Post-Award Interest

Courts retain power to adjust the post-award interest component of an award, particularly where the interest runs at a rate that is commercially unconscionable or where subsequent events have made the original rate inappropriate. This is a limited equitable jurisdiction, not a general licence to revise the economics of an award.

4. Article 142 Powers (Supreme Court Only)

The Constitution Bench confirmed that the Supreme Court's powers under Article 142 of the Constitution: to do complete justice: are available in exceptional circumstances to mould relief, including in relation to arbitral awards. This power is exclusive to the Supreme Court and cannot be exercised by High Courts or subordinate courts.

The Dissent: A Different Vision of Curial Power

One judge dissented. The minority opinion took the view that the majority had drawn the line too sharply and that an overly rigid prohibition on modification could produce injustice in cases where setting aside an entire award was disproportionate to the error actually identified. The dissenting judge argued for a more flexible reading that would allow courts to make targeted corrections without disturbing the bulk of a well-reasoned award.

While the dissent does not change the legal position, it is worth noting because it reflects a concern that will likely resurface in practice: what happens when an award is 95 percent correct but contains one component that is clearly wrong? Under the majority's framework, the court's options are to uphold the entire award or set it aside entirely, leaving the parties to begin again. The dissent found this a harsh outcome.

Practical Implications: What This Means for Parties in Arbitration

The judgment sharpens the stakes considerably. Here is what parties and counsel need to understand:

Draft your grounds for challenge carefully. If you are seeking to challenge an award under Section 34, you need to frame your grounds in terms that fit within the statutory categories: violation of public policy, patent illegality on the face of the award, breach of natural justice, or non-arbitrability. Courts will not entertain grounds that amount to asking for a do-over on the merits.

The severability argument is worth examining. If only part of an award is problematic, a well-crafted Section 34 petition that targets the offending portion and argues for its severability may allow you to preserve a favourable component of the award while removing the part you contest. This requires careful drafting and a clear-eyed assessment of whether the portions are genuinely separable.

Arbitrators should be more careful with interest provisions. Given that post-award interest is one of the areas where courts retain some flexibility, parties challenging awards on interest grounds may have slightly more traction than on other issues. Conversely, arbitrators should ensure that their interest calculations are defensible and clearly reasoned.

The finality of arbitral awards is strengthened. From a commercial standpoint, this judgment is broadly positive for arbitration as a dispute resolution mechanism. Parties who choose arbitration are doing so, in part, because they want a final and binding outcome. A court system that could effectively rewrite awards on the merits would undermine that expectation. The majority's approach reinforces it.

A Note on the Broader Landscape

This judgment arrives at an interesting moment for Indian arbitration. The government has invested significantly in positioning India as an arbitration-friendly jurisdiction: through the 2015 and 2019 amendments to the Act, through the establishment of specialised courts for commercial disputes, and through the promotion of institutional arbitration under bodies like the Mumbai Centre for International Arbitration and the Delhi International Arbitration Centre. A Constitution Bench ruling that firmly endorses arbitral finality is consistent with these ambitions and should provide additional comfort to international counterparties considering India-seated arbitrations.

At the same time, the judgment does not diminish the importance of getting the arbitral process right from the start. An award that cannot easily be modified at the challenge stage is an award that must be correctly made in the first place. This places a premium on the quality of the arbitral tribunal, the conduct of proceedings, and the quality of advocacy before the arbitrator: all of which are areas where early investment in experienced counsel pays dividends that no court can later substitute.