Supreme Court Clarifies Tax Treatment of Broken Period Interest for Banks in 2024

Debt instruments such as bonds and government securities often give rise to a recurring tax controversy around broken period interest. This is the portion of interest that has accumulated on a security from the last coupon date up to the date of transfer, and is paid by the buyer to the seller as part of the transaction price.

For years, the central question before the tax authorities and the banking sector was:

  • Is this broken period interest a revenue item, taxable or deductible as “interest”? or
  • Is it a capital adjustment, forming part of the cost (for the purchaser) or part of the sale consideration (for the seller)?

The Supreme Court’s 2024 decision in Bank of Rajasthan Ltd. has finally given authoritative clarity. The ruling confirms that, in the hands of the purchaser, broken period interest is a capital outlay, and not interest income or a revenue expenditure. This has wide ramifications for banks, financial institutions, mutual funds, and other debt market participants.

This article revisits the concept of broken period interest, explains the competing positions that existed earlier, and then walks through the Supreme Court’s reasoning and the resulting compliance implications post-2024.

Understanding Broken Period Interest in Debt Securities

How Interest Accrues and Why ‘Broken Period’ Arises

Most bonds and government securities pay interest (coupon) at fixed periodic intervals—commonly semi-annually. However, these instruments are traded on a continuous basis in the secondary market. Because trading does not align perfectly with coupon dates, there is always some portion of interest that has already accrued but is not yet due for payment.

Consider the following illustration:

  • A bond pays interest twice a year on 1 February and 1 August.
  • Ms. Sharma purchases this bond on 1 April.

From 1 February (the last coupon date) until 1 April (the purchase date), two months’ interest has already accrued on the bond.

  1. Accrued Portion (Broken Period)

    • The seller held the bond during these two months and is economically entitled to the interest for that period.

  2. Pricing the Transaction

    • The buyer ordinarily pays:
      • the clean price: price of the bond excluding accrued interest; and
      • the accrued interest for two months: referred to as broken period interest.
    • The total amount the buyer pays (clean price + accrued interest) is often called the dirty price or full price.

  3. Next Coupon Payment

    • On 1 August, Ms. Sharma (the new holder) receives the entire six months’ interest—from 1 February to 1 August—even though she only held the bond for four months.
    • Economically, she has compensated the seller for the two months’ interest (by paying broken period interest at the time of purchase), and now receives the full six-month coupon.

The tax dispute centred on how to characterize the amount paid by the purchaser to the seller towards this accrued interest component.

Historical Divide: Revenue vs Assessee Positions

Revenue’s Argument: Taxable Interest / Revenue Nature

The tax department’s consistent stand over the years was as follows:

  1. Income Characterization

    • Any amount described as “interest” is taxable as such.
    • The department treated the coupon received by the purchaser on the next due date as interest income chargeable under the head “Income from Other Sources” under Section 56 of the Income Tax Act 1961.

  2. Broken Period Interest as a Revenue Expense

    • The broken period interest paid by the purchaser at the time of acquisition was seen as a prepayment or advance expense incurred to earn that subsequent interest income.
    • On this reasoning, the department viewed it as a revenue expenditure related to the earning of interest income rather than as part of the capital cost of the security itself.

  3. Tax Consequences

    • Inscriptions in assessments often attempted to:
      • tax the entire coupon received by the purchaser as interest income; and
      • either allow or disallow the corresponding broken period interest as a revenue deduction, leading to recurring disputes.

Assessee’s Argument: Capital Adjustment to Cost / Consideration

Banks, financial institutions, and other market participants advanced a fundamentally different view:

  1. Capital Nature of Payment
    • The broken period interest paid on purchase is not “interest” in the orthodox sense.
    • It is part of the acquisition cost of an income-generating capital asset (the bond or security).