Interest Calculation Under Section 31 of Arbitration Act Clarified

Introduction

The Supreme Court of India recently delivered a significant judgment in the case of M/S. INTERSTATE CONSTRUCTION VERSUS NATIONAL PROJECTS CONSTRUCTION CORPORATION LTD., addressing the nuances of interest calculation under Section 31 of the Arbitration and Conciliation Act, 1996. This ruling clarifies the legal framework surrounding the award of interest in arbitration proceedings, particularly the interplay between pre-reference, pendente lite, and post-award interest.

Case Background

The case arose from a contractual dispute between M/S. INTERSTATE CONSTRUCTION (the appellant) and NATIONAL PROJECTS CONSTRUCTION CORPORATION LTD. (the respondent) concerning the execution of a contract for the Ramagundam Super Thermal Power Project. Following the completion of the contract work in 1987, disputes emerged regarding payments, leading the appellant to invoke arbitration in 1993. After a series of procedural developments, an arbitral tribunal was constituted, which ultimately issued an award on October 28, 2020, granting various claims, including interest on the awarded amounts.

The respondent challenged the arbitral award under Section 34 of the Arbitration and Conciliation Act, leading to a judgment by a Single Judge of the Delhi High Court on August 2, 2021. The Single Judge upheld most of the arbitral tribunal's findings but modified the award concerning future interest, limiting it to 9% per annum. The respondent appealed this decision to the Division Bench of the High Court, which ultimately set aside the directions regarding interest in the arbitral award.

What The Lower Authorities Held

The Single Judge of the High Court had upheld the arbitral tribunal's decision to award pre-reference interest at 18% per annum and pendente lite interest at 12% per annum for specified periods. However, the Single Judge found the future interest awarded at 18% per annum to be excessive and reduced it to 9% per annum. The Division Bench, on appeal, took a different stance, asserting that the arbitral tribunal had erred in awarding interest for three distinct periods: pre-reference, pendente lite, and future. The Division Bench concluded that the statutory framework only recognized two periods for interest calculation, leading to the setting aside of the arbitral tribunal's directions regarding interest.

The Court's Reasoning

The Supreme Court, while examining the appeal, focused on the interpretation of Section 31(7) of the Arbitration and Conciliation Act. The Court noted that this provision allows for the award of interest for the period from the date the cause of action arose until the date of the award, as well as from the date of the award until actual payment. The Court emphasized that the distinction between pre-reference and pendente lite interest had effectively been merged under the current legal framework, allowing the arbitral tribunal to award interest for both periods collectively.

The Court criticized the Division Bench's interpretation, asserting that the arbitral tribunal had the discretion to award interest for the entire duration from the cause of action to the award, including the pendente lite period. The Supreme Court reiterated that the arbitral tribunal's authority to award interest is not limited to a rigid interpretation of the statutory provisions but is guided by the principles of fairness and equity.

Statutory Interpretation

Section 31(7) of the Arbitration and Conciliation Act, 1996, is central to the Court's analysis. The provision, particularly after its amendment in 2015, allows for the inclusion of interest in the sum awarded by the arbitral tribunal. The Court highlighted that the statutory language permits the tribunal to award interest for the entire period from the cause of action to the award, thus recognizing the need for compensation for the delay in payment.

The Court also addressed the issue of compound interest, clarifying that while the arbitral tribunal can award interest for different periods, it cannot levy interest on interest. This principle is grounded in the legal precedents that prohibit the awarding of compound interest unless explicitly provided for in the contract.

CONSTITUTIONAL OR POLICY CONTEXT

While the judgment primarily revolves around statutory interpretation, it also reflects broader principles of justice and fairness in arbitration. The Court's emphasis on the arbitral tribunal's discretion to award interest underscores the importance of ensuring that parties are compensated for the time value of money, particularly in protracted disputes. This approach aligns with the overarching goal of arbitration as an efficient and equitable means of resolving disputes.

Why This Judgment Matters

This ruling is significant for legal practitioners and parties involved in arbitration as it clarifies the scope of interest awards under the Arbitration and Conciliation Act. By affirming the arbitral tribunal's authority to award interest for both pre-reference and pendente lite periods, the Supreme Court has reinforced the principle that parties should be compensated for delays in payment. This judgment also serves as a reminder of the importance of precise drafting in arbitration agreements, particularly concerning interest provisions.

Final Outcome

The Supreme Court set aside the Division Bench's judgment and restored the arbitral tribunal's award concerning interest, thereby allowing the appeal filed by M/S. INTERSTATE CONSTRUCTION. The Court emphasized that the arbitral tribunal had acted within its jurisdiction in awarding interest for the relevant periods, and the legal framework supports such awards.

Case Details

• Case Title: M/S. INTERSTATE CONSTRUCTION VERSUS NATIONAL PROJECTS CONSTRUCTION CORPORATION LTD.
• Citation: 2025 INSC 699
• Court: IN THE SUPREME COURT OF INDIA
• Bench: Justice Abhay S. Oka, Justice Ujjal Bhuyan
• Date of Judgment: 2025-05-15