Supreme Court Rules Arbitrators Can Award Interest on Interest: Overrules S.L. Arora in Hyder Consulting Case - 2026-06-01

The End of 'Interest on Interest' Ambiguity: Supreme Court Settles Arbitration Stalemate

In a landmark decision that provides much-needed clarity for commercial enterprises and legal professionals alike, a three-judge bench of the Supreme Court of India in M/s. Hyder Consulting (UK) Ltd. v. Governor, State of Orissa has fundamentally altered the landscape of arbitral awards. By a majority verdict, the Court has ruled that under Section 31(7) of the Arbitration and Conciliation Act, 1996, an arbitral tribunal is empowered to award post-award interest on the aggregate sum, which includes pre-award interest.

The judgment, led by Justices S.A. Bobde and Abhay Manohar Sapre, effectively overrules the 2010 decision in State of Haryana v. S.L. Arora & Co. , which had previously held that such an award of "interest on interest" was impermissible under the 1996 Act.

The Backdrop: A Battle over the Definition of 'Sum'

The dispute arose from a simple but potent question of statutory interpretation: what does the word "sum" mean in the context of Section 31(7) of the Arbitration and Conciliation Act, 1996? The section provides for the award of interest for both the pre-award and post-award periods. The previous precedent in S.L. Arora had argued that the "sum directed to be paid" refers only to the principal amount, thereby prohibiting arbitrators from including pre-award interest in the basis for calculating post-award interest.

This interpretation created significant financial repercussions for claimants, particularly in high-stakes arbitration where proceedings often drag on for years, leaving creditors without recourse for the loss of the time-value of money.

Arguments from the Bar

Senior Counsel K.K. Venugopal, representing the appellants, argued that the legislative intent was to treat the award as a singular, consolidated debt. He contended that once pre-award interest is included in the award, it merges with the principal to become a new "sum." Consequently, barring interest on this consolidated amount penalized the claimant while rewarding the recalcitrant judgment-debtor who delayed payment.

Conversely, the State of Orissa, represented by Additional Solicitor General L. Nageshwara Rao, maintained the S.L. Arora position, arguing that "interest on interest" was compound interest, which should only be permitted if there is an explicit contractual stipulation, which was absent in this case.

Legal Analysis: A Plain-Meaning Approach

In a compelling opinion, Justice S.A. Bobde employed a literal interpretation of the statute. He noted that unlike Section 34 of the Code of Civil Procedure (CPC)—which specifically uses the phrase "on the principal sum adjudged"—Section 31(7) of the Arbitration Act consciously avoids the word "principal."

"Parliament has the undoubted power to legislate on the subject and provide that the Arbitral Tribunal may award interest on the sum directed to be paid by the Award, meaning a sum inclusive of principal sum adjudged and the interest," noted Justice Bobde.

Justice Abhay Manohar Sapre, concurring, emphasized the "golden rules of interpretation." He reasoned that the interest component, once "included in the sum," loses its independent identity and takes on the character of the total award. By this logic, the post-award interest is not "interest on interest," but rather interest on the final sum decreed by the tribunal.

Key Observations

The justices provided pointed reasoning regarding their departure from previous jurisprudence:

• On the definition of 'sum': "When used as a noun, as it seems to have been used in this provision, the word 'sum' simply means 'an amount of money'; whatever it may include—'principal' and 'interest' or one of the two." — Justice S.A. Bobde
• On legislative intent: "The significance and the departure from the language of Section 34 of the CPC in Section 31(7) of the Act, 1996 is significant and shows the intention of Parliament." — Justice S.A. Bobde
• On the merging of interest: "The interest component then loses its character of an 'interest' and takes the colour of 'sum' for which the award is made." — Justice Abhay Manohar Sapre

The Verdict and Its Impact

The Court concluded that the arbitral tribunal has the statutory authority to award interest on the aggregate of the principal and pre-award interest. While Chief Justice H.L. Dattu dissented, maintaining the stricter interpretation of S.L. Arora , the majority view now stands as the definitive legal position.

This judgment acts as a shield for claimants in arbitral proceedings, ensuring that delayed payments are compensated adequately. By clarifying that the "sum" under Section 31(7) is an aggregate of principal and interest, the Supreme Court has removed a major hurdle for businesses seeking to recover the true value of their claims, discouraging parties from abusing the prolonged duration of post-award litigation.