Review of provisions related to International Securities Identification Number (ISIN) for debt securities issued on private placement basis

CIRCULAR
HO/17/11/24(8)2026-DDHS-POD1/I/23125/2026 October 07, 2026 To, Issuers of listed debt securities; All Stock Exchanges; All Depositories Sub: Review of provisions related to International Securities Identification Number (ISIN) for debt securities issued on private placement basis

1. Chapter VIII of SEBI Master Circular for Issue and Listing of Non-Convertible Securities,
   Securitised Debt Instruments, Security Receipts, Municipal Debt Securities and Commercial Paper dated October 15, 2025 (“NCS Master Circular”) deals with specifications related to ISIN for debt securities.
2. Based on the feedback received from market participants, in order to enhance ease of
   fund raising and Asset Liability Management by issuers, it has been decided to increase the maximum number of ISINs maturing in a financial year for debt securities issued on private placement basis.
3. Accordingly, para 1.1, 1.2 and 1.3 of the NCS Master Circular shall be replaced with the
   following:
   “1.1 A maximum number of seventeen ISINs maturing in any financial year shall be allowed for an issuer of debt securities. In addition, a further six ISINs shall also be available for the issuance of the capital gains tax debt securities by the authorized issuers under section 54EC of the Income Tax Act, 1961 on private placement basis.
   1.2 Out of the seventeen ISINs maturing in a financial year, the bifurcation of ISINs
   shall be as under:
   a. A maximum of twelve ISINs maturing per financial year shall be allowed for plain vanilla debt securities. Within this limit of twelve ISINs, the issuer can issue both secured and unsecured debt securities.

b. In case the total outstanding amount across the twelve ISINs, maturing in a given financial year, reaches Rs. 15,000 Crore, then for each additional issuance of Rs. 3000 Crore, one additional ISIN may be permitted to mature in the same financial year. Illustration:
The table below illustrates the applicability of the aforementioned provisions:
Outstanding amount maturing in a financial year (in Rs. Crore) Applicable ISIN limit 1-15000 12 15001-18000 13 18001-21000 14 For every incremental 3000 +1
c. A maximum of five ISINs maturing per financial year shall be allowed for
structured debt securities, market linked debt securities, Floating Rate Bonds (FRBs), Zero Coupon Bonds (ZCBs) and Debt Capital instruments (Tier II bonds). Any existing ISINs pertaining to Floating Rate Bonds (FRBs), Zero Coupon Bonds (ZCBs) and Debt Capital instruments (Tier II bonds) issued prior to the date of this circular, which are outstanding and scheduled to mature in any subsequent financial year, shall be grandfathered to avoid any unintended breach of ISIN cap. However, if the aggregate number of such outstanding legacy ISINs maturing in any subsequent financial year already equals or exceeds five, the issuer shall not issue any further new ISIN(s) under this sub￾clause (including for structured debt securities, market linked debt securities, FRBs, ZCBs and Debt Capital instruments/ Tier II bonds) for that specific financial year, until the total number of maturing ISINs in the said category falls below five.
1.3 Where an issuer issues only structured/ market linked debt securities/ FRBs/ ZCBs/
Debt Capital instruments (Tier II bonds), the maximum number of ISINs allowed to mature in a financial year shall be twelve.”
4. Further, it has been decided that ISINs pertaining to the following instruments shall be
excluded while calculating the applicable ISIN limits for an issuer:
4.1. Government of India (GoI) serviced/ Extra Budgetary Resources (EBR) bonds
4.2. Environment, Social and Governance (ESG) Debt Securities, issued in terms of
Securities and Exchange Board of India (Issue and Listing of Non-Convertible Securities) Regulations, 2021

5. All other provisions of Chapter VIII (Specifications related to ISIN for debt securities) of the
   NCS Master Circular shall remain unchanged.
6. The provisions of this circular shall come into force with immediate effect.
7. The Stock Exchanges and Depositories are advised to:
   7.1. Make amendments to the relevant bye-laws, rules and regulations for the
   implementation of the above decision, as may be applicable/ necessary;
   7.2. Take all necessary steps and carry out system changes, if any, to implement the
   above;
   7.3. Disseminate the provisions of this circular on their website;
   7.4. Communicate to SEBI the status of implementation of the provisions of this circular;
   7.5. Monitor the compliance of this circular by issuer companies.
8. The Circular is issued in exercise of the powers conferred under Section 11(1) of the
   Securities and Exchange Board of India Act, 1992 read with Regulation 55 (1) of the SEBI (Issue and Listing of Non-Convertible Securities) Regulations, 2021, to protect the interest of investors in securities and to promote the development of, and to regulate the securities market.
9. This Circular is available at www.sebi.gov.in under the link “Legal → Circulars”.
   Yours faithfully,
   Rohit Dubey
   General Manager
   Department of Debt and Hybrid Securities
   Tel No. 022-2644-9510
   Email ID - rohitd@sebi.gov.in