Case Law Analysis

Section 31(7)(a) Arbitration Act | Arbitrators Cannot Deviate from Contractual Interest Rates: Bombay HC Sets Aside Award

Bombay High Court rules that arbitral awards must strictly adhere to contractual interest rate clauses under Section 31(7)(a) of the Arbitration Act. The court set aside an award granting 18% compounded interest, remanding the dispute for fresh arbitration, reinforcing that arbitrators cannot override agreed terms even under judicial review.

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Jun 13, 2026, 11:21 PM(Updated: Nov 3, 2026)
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Section 31(7)(a) Arbitration Act | Arbitrators Cannot Deviate from Contractual Interest Rates: Bombay HC Sets Aside Award

In a significant ruling on arbitration awards, the Bombay High Court has underscored the primacy of contractual terms in determining interest rates, setting aside an arbitral award that imposed an 18% quarterly compounded interest rate contrary to the parties' agreement. The judgment clarifies the limited scope of judicial intervention under Section 34 of the Arbitration and Conciliation Act, 1996, particularly in modifying pendente lite interest, while permitting partial setting aside of awards where interest calculations deviate from contractual bargains.

Background & Facts

The Dispute

The dispute arose from a contract between the Public Works Department (PWD), Maharashtra, and Kamat Transport Infrastructure Private Limited (KTIPL) for road construction. KTIPL alleged delays caused by PWD’s failure to provide Right of Way (ROW), leading to prolonged project completion (45 months against the scheduled 18 months). KTIPL invoked arbitration, seeking damages and interest.

Key Facts

  • Contract Date: Not explicitly mentioned, but the dispute spans delays from the scheduled completion date (18 months) to an additional 27 months.
  • Arbitral Award: The Learned Arbitral Tribunal awarded KTIPL damages and interest at 18% per annum, compounded quarterly, covering pre-arbitration, pendente lite, and post-award periods.
  • Contractual Provisions:
    • Clause 19.9.2: PWD liable to pay interest at State Bank of India’s base rate + 2%, compounded quarterly, for delayed payments.
    • Clause 19.2.7: KTIPL liable to pay 18% per annum for delayed repayment of advance payments, with PWD entitled to encash the bank guarantee.
  • KTIPL’s Financial Burden: Due to delays, KTIPL borrowed funds at 13.8% per annum (compounded monthly), escalating to an effective rate of 18.8% per annum due to loan servicing breaches.

Procedural History

  • Arbitration Proceedings: KTIPL invoked arbitration, leading to an award granting damages and interest.
  • Section 34 Petition: PWD challenged the award under Section 34 of the Arbitration Act, 1996, arguing the interest rate violated contractual terms.
  • Bombay High Court: The court partially set aside the award, restricting intervention to the interest component while upholding the rest.

Relief Sought

PWD sought:

  • Setting aside the arbitral award’s interest component (18% quarterly compounded).
  • Remand of the interest dispute to arbitration for fresh determination.

The central question was whether the arbitral tribunal’s award of 18% quarterly compounded interest for pre-arbitration, pendente lite, and post-award periods violated the contractual terms and Section 31(7)(a) of the Arbitration Act, 1996, which mandates interest awards to conform to agreed rates.

Arguments Presented

For the Petitioner (PWD)

  • The arbitral tribunal’s reliance on Clause 19.2.7 (KTIPL’s obligation) to justify 18% quarterly compounded interest was misplaced, as the clause applied only to KTIPL’s delayed repayments, not PWD’s liabilities.
  • The tribunal’s extrapolation of KTIPL’s borrowing costs (18.8% per annum) to justify the interest rate amounted to awarding damages, not interest, violating the contractual bargain.
  • The award was patently illegal as it ignored the calibrated interest rates agreed upon in Clauses 19.9.2 and 19.2.7.

For the Respondent (KTIPL)

  • The tribunal’s interpretation was reasonable, given KTIPL’s actual borrowing costs and PWD’s prolonged delays.
  • The 18% rate was justified under Clause 19.2.7, and the tribunal’s discretion under Section 31(7)(a) should not be interfered with unless perverse.

The Court's Analysis

The court conducted a two-pronged analysis:

  1. Contractual Interpretation:

    • The court emphasized that Clauses 19.9.2 and 19.2.7 were specific and distinct, applying only to their respective scenarios (PWD’s delayed payments vs. KTIPL’s delayed repayments).
    • The tribunal’s reliance on Clause 19.2.7 to justify PWD’s liability was erroneous, as the clause pertained to KTIPL’s obligations, not PWD’s.
    • The 18% rate was not a mutually agreed rate for PWD’s liabilities but a penalty for KTIPL’s defaults. Applying it to PWD turned the contractual bargain on its head.
  2. Judicial Intervention Under Section 34:

    • The court relied on the Supreme Court’s decision in Gayatri Balasamy v. ISG Novasoft Technologies Ltd. ((2025) 7 SCC 1), which permits partial modification of arbitral awards under Section 34 but only for post-award interest under Section 31(7)(b).
    • Pendente lite interest (under Section 31(7)(a)) cannot be modified; the court’s only options are setting aside the rate or remanding the matter under Section 34(4).
    • The tribunal’s award of 18% quarterly compounded interest for pendente lite and post-award periods was perverse, as it:
      • Ignored the contractual terms.
      • Extrapolated KTIPL’s borrowing costs to PWD’s liability, conflating interest with damages.
      • Altered simple interest to compounded interest without contractual basis.

"The parties have consciously agreed to different rates of interest and this conscious choice cannot be wished away. The attempt to justify [the 18% rate] by reference to the rate of interest borne by KTIPL with its lenders, to my mind is, a perverse and patently illegal approach, by turning the bargain on interest in the contract on its head and further extrapolating from it to change simple interest to compound interest and that too at quarterly rests."

The Verdict

The court partially allowed PWD’s petition:

  • Set aside the arbitral award’s interest component (18% quarterly compounded) for violating contractual terms.
  • Upheld the award in all other respects, including the damages granted.
  • Remanded the dispute over the interest rate to arbitration for fresh determination, as the arbitration agreement subsists on this facet.
  • No costs were awarded due to the case’s peculiar circumstances.

What This Means For Similar Cases

Contractual Terms Prevail Over Arbitral Discretion

  • Arbitrators cannot rewrite contractual bargains on interest rates. Courts will intervene under Section 34 if awards deviate from expressly agreed terms.
  • Key Takeaway: Parties must draft clear, specific interest clauses to avoid disputes over rates, compounding, and applicability periods.

Limited Scope for Judicial Modification

  • Courts cannot modify pendente lite interest under Section 31(7)(a); the only remedies are setting aside the rate or remanding the matter under Section 34(4).
  • Post-award interest under Section 31(7)(b) may be modified if the award is silent or the facts justify adjustment.
  • Practitioners’ Note: Challenges to interest awards must focus on contractual violations, not mere disagreement with the rate.

Damages vs. Interest: A Critical Distinction

  • Arbitrators cannot conflate interest with damages. Interest must be contractually grounded, while damages may account for actual losses (e.g., borrowing costs).
  • Example: In this case, KTIPL’s 18.8% borrowing cost was irrelevant to PWD’s liability, which was governed by Clause 19.9.2 (base rate + 2%).
  • Actionable Insight: Parties should separately plead interest and damages, ensuring arbitrators distinguish between the two.

Case Details

Public Works Department, Maharashtra v. Kamat Transport Infrastructure Private Limited

2026:BHC-OS:12910
PDF
Court
Bombay High Court (Original Side)
Date
12 June 2026
Case Number
Arbitration Petition No. 262 of 2024
Bench
Justice Somashekhar Sundaresan
Counsel
Pet: Not explicitly mentioned
Res: Not explicitly mentioned

Frequently Asked Questions

Section 31(7)(a) mandates that pendente lite interest must conform to the rate agreed upon by the parties in their contract. If no rate is specified, the arbitral tribunal may award interest at a rate it deems reasonable. However, courts cannot modify this rate under Section 34; they can only set it aside or remand the matter for fresh determination.
No. The Bombay High Court held that arbitrators cannot unilaterally convert simple interest to compound interest unless the contract expressly permits it. In this case, the tribunal’s award of 18% quarterly compounded interest was set aside for violating the contractual terms, which did not provide for compounding.
Under Section 31(7)(a), pendente lite interest (awarded during arbitration proceedings) must strictly adhere to contractual terms and cannot be modified by courts under Section 34. Post-award interest (under Section 31(7)(b)) may be modified by courts if the award is silent or the facts justify adjustment, as per Gayatri Balasamy.
Courts can partially set aside an award if a specific component (e.g., interest rate) violates contractual terms or statutory provisions, while the rest of the award remains valid. The Bombay High Court relied on Gayatri Balasamy to excise only the interest component without disturbing the damages awarded.
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Disclaimer

This article is for informational purposes only and does not constitute legal advice. The views expressed are based on the judgment analysis and should not be taken as professional counsel. Please consult with a qualified attorney for advice specific to your situation.