Court: Judges can't redo an arbitrator's math just because they'd do it differently

The runway was 72% built when the government pulled the plug. The arbitrator said: pay up. Then a higher court tried to re-decide the numbers.

For thirteen years, a construction company waited for its money. For seven more years, it fought to keep what an arbitrator had already given it. And when a Division Bench of the Madras High Court tried to redo the math — substituting its own judgment for the arbitrator's — the Supreme Court stepped in with a reminder that cuts to the bone: a court is not an appellate authority over an arbitrator's award. It cannot re-decide the numbers just because it would have done the math differently.

When the waterlogged site became a battlefield

In 1988, the Union of India hired Atlanta Limited to build a runway at a Naval Air Station in Arakonam. The contract was worth about ₹19.58 crores. The timeline: 21 months. The reality: the site was waterlogged from the start, the government kept changing requirements and adding demands for sophisticated machinery, and petroleum products became scarce due to the Gulf crisis. The government granted three extensions, but in April 1992 — when the runway was about 72% complete — it terminated the contract. Part of the reason: the site had become restricted after a presidential inauguration. Atlanta's machinery was left stranded at the site for years.

The company had built most of a runway. It had not been paid for most of what it built. And its machinery sat idle on a naval air station it could no longer access — rusting in the coastal humidity, year after year, while the company's balance sheets bled. The salt air crept into every gear and piston, a slow corrosion that mirrored the grinding pace of litigation to come.

The 506-page award that changed hands

Atlanta invoked the arbitration clause. A Sole Arbitrator was appointed. After years of proceedings, on 24 June 1999, the arbitrator delivered a 506-page award — a thick, heavy document that must have felt like a small library of vindication — in Atlanta's favour: about ₹25.96 crores, including interest.

The arbitrator found that the government had illegally terminated the contract, that Atlanta was entitled to extension of time, that it deserved idle hire charges for its stranded machinery, and that the value of that machinery had to be compensated. Every major issue went Atlanta's way.

The Union of India challenged the award before a Single Judge of the Madras High Court under Sections 30 and 33 of the Arbitration Act, 1940 (the provisions that allow a court to set aside or modify an award on limited grounds — not to re-decide the merits). The Single Judge dismissed the petition in January 2009. The award stood. A decree was passed. The courtroom must have felt quiet as the judge affirmed what the arbitrator had already said — the rustle of papers the only sound as the government's challenge collapsed.

But the government appealed under Section 39 of the 1940 Act (which lists the orders from which an appeal lies). And the Division Bench — in July 2010 — partly allowed the appeal. It set aside the arbitrator's findings on extension of time, illegal termination, idle hire charges, and machinery value. It effectively rewrote the award, undoing years of work and pages of reasoning.

Why the Division Bench went too far

The Division Bench did not find that the arbitrator had committed misconduct (a serious procedural or ethical failing) or that the award contained an error on its face (a legal mistake visible from the award itself without looking at outside evidence). Those are the only two grounds on which a court can interfere with an arbitral award under the 1940 Act.

Instead, the Division Bench did something else: it reappraised the evidence. It looked at the same documents the arbitrator had seen, reached different conclusions, and substituted its own views for the arbitrator's. It decided that the contract's "excepted matters" clauses — provisions that exclude certain disputes from arbitration — applied, even though the arbitrator had specifically considered and rejected that argument based on the evidence and the conduct of the parties.

Atlanta appealed to the Supreme Court. The question was simple: could a court re-decide what an arbitrator had already decided, just because it disagreed?

The binding rope of precedent

The Supreme Court did not write on a clean slate. A chain of its own earlier decisions — each one a warning against judicial overreach in arbitration — guided the bench. In Kwality Manufacturing Corporation v. Central Warehousing Corporation, the court had held that an award could not be set aside merely because a different view was possible. In Assam State Electricity Board v. Buildworth Private Limited, the principle was reaffirmed: the arbitrator's interpretation of contract terms, if plausible, was final. State of Rajasthan v. Puri Construction Co. Ltd. added that courts could not sit in appeal over the quantum of damages fixed by the arbitrator. Arosan Enterprises Ltd. v. Union of India and Rajasthan State Mines & Minerals Ltd. v. Eastern Engineering Enterprises reinforced that the arbitrator was the sole judge of the quality and weight of evidence. NTPC Ltd. v. Deconar Services Pvt. Ltd., decided just months before this case, reiterated the narrowness of the judicial window. And Municipal Corporation of Delhi v. Jagan Nath Ashok Kumar and Food Corporation of India v. Sreekanth Transport completed the wall of precedent: the court cannot reappraise, cannot reweigh, cannot substitute.

Each of these cases stood for the same core idea — the arbitrator is the master of facts and contract interpretation. The court is not. The Division Bench had ignored every one of them.

The Supreme Court's answer: no, you are not the arbitrator

On 18 January 2022, a three-judge bench of the Supreme Court — Justice N.V. Ramana, Justice A.S. Bopanna, and Justice Hima Kohli — quashed the Division Bench's judgment and restored the Single Judge's order. The full award was back. The file, thin with age, was finally closed. The bench leaned forward as the arguments concluded, the weight of a decade of litigation settling into the silence of the courtroom.

The court's reasoning was sharp and categorical. "Courts cannot reappraise evidence or substitute their own views for those of the arbitrator, even if a different view is possible on the same evidence," the judgment held. A court exercising jurisdiction under Sections 30 and 33 of the 1940 Act does not sit in appeal over an arbitral award. The only permissible grounds for interference are error on the face of the award or misconduct by the arbitrator.

Where the arbitrator has interpreted the clauses of the contract by taking a particular plausible view based on evidence and material on record, the appellate court cannot sit over such interpretation and substitute its own view. Matters relating to construction of contract lie within the province of the Arbitral Tribunal.

And crucially: where the arbitrator has duly noted, discussed, and declared certain contractual clauses characterised as 'excepted matters' to be inapplicable based on evidence, conduct of parties, and other contract terms, the court cannot hold the arbitrator to have misconducted himself or exceeded jurisdiction merely because those clauses were invoked by a party.

The court cited the full line of precedents — from Kwality Manufacturing to Food Corporation of India — all standing for the same principle: the arbitrator is the master of facts and contract interpretation. The court is not.

What this means for every commercial contract

For practitioners, the message is clear. The 1940 Act has been replaced by the Arbitration and Conciliation Act, 1996, but the core principle survives: judicial review of arbitral awards is narrow. A court that tries to re-decide the merits — to redo the arbitrator's math — exceeds its jurisdiction.

For parties to arbitration: choose your arbitrator carefully. Once the award is made, the scope to challenge it on merits is vanishingly small. The fight is about process and legality, not about who got the numbers right.

THE PLAY: When challenging an arbitral award, never argue that the arbitrator got the facts or contract interpretation wrong — argue only that the award contains an error visible on its face or that the arbitrator committed misconduct, because the court cannot substitute its own judgment for the arbitrator's.

The runway was never finished. But the company that built 72% of it finally got paid for what it had done — because the Supreme Court remembered that an arbitrator's award is not a draft to be edited by judges who think they could have done the math better.