Two investments can have similar names while representing different securities, plans or options. An International Securities Identification Number, or ISIN, helps distinguish them. This 12-character code gives a security a standard identity that can be recognised across investment records and market systems. Here is how an ISIN works, what its characters mean and why mutual fund investors may need it.
Table of Contents
What is an ISIN number?
An ISIN number is a unique 12-character alphanumeric code used to identify a specific security. Shares, bonds, debentures, government securities and mutual fund units can each carry an ISIN.
The code identifies the security rather than its owner. This means that all investors holding the same security will see the same ISIN in the relevant records, while a different security, mutual fund plan or option may have a separate identifier.
Key Takeaways
- ISIN full form is International Securities Identification Number.
- An ISIN is a unique 12-character alphanumeric code used to identify a particular security.
- Shares, bonds, debentures, government securities and mutual fund units can have ISINs.
- Different plans or options under one mutual fund scheme may have separate ISINs.
- An ISIN identifies a security but does not indicate its risk, suitability or potential returns.
What is the full form of ISIN?
The ISIN full form is International Securities Identification Number. The name reflects its two main features:
- International: It follows a globally recognised identification standard.
- Securities identification number: It distinguishes one financial instrument from another.
ISINs are based on the ISO 6166 standard and are used within financial-market systems to support consistent security identification across institutions and jurisdictions.
Source: Association of National Numbering Agencies, ISIN Guidelines relating to ISO 6166, 26 June 2026.
Which investments have an ISIN?
An ISIN can be assigned to different types of financial instruments, including:
- Equity shares
- Preference shares
- Bonds and debentures
- Government securities
- Commercial paper
- Certificates of deposit
- Exchange-traded funds
- Mutual fund units
- Other securities admitted into the relevant market or depository system
Different securities issued by the same entity do not necessarily share one ISIN. For example, a company’s equity shares and bonds represent different instruments and would be identified separately.
CDSL states that an ISIN is assigned when a security is admitted into the depository system and that different securities issued by the same issuer carry different ISINs.
Source: CDSL, Demat CDSL Way: General FAQs, January 2022.
How is an ISIN structured?
An ISIN number contains 12 alphanumeric characters. Each part has a specific role:
| Part | Number of characters | What it represents |
| Country code | 2 | The country or jurisdiction associated with the security |
| Security identifier | 9 | The identification assigned to the particular security |
| Check digit | 1 | A numerical digit used to validate the complete code |
For securities registered in India, the first two characters are IN. The next nine characters identify the security, while the final digit helps confirm whether the complete code is valid.
Source: Association of National Numbering Agencies, ISIN Guidelines relating to ISO 6166, 26 June 2026.
How to read an Indian ISIN
The structure of an Indian ISIN can be read as follows:
| Part | Illustrative representation |
| Country code | IN |
| Security identifier | Nine alphanumeric characters |
| Check digit | One numerical digit |
The first two letters identify the Indian jurisdiction. The following nine characters identify the security, while the final digit helps validate the complete code. These three parts together form one 12-character ISIN.
A difference in even one character may point to another security or make the code invalid. Investors should therefore copy and verify the complete ISIN rather than relying on a partial match.
How is an ISIN assigned in India?
An investor or issuer does not create an ISIN independently. The issuer provides the required details about the security through the applicable process, after which the identifier is assigned under India’s securities-identification framework.
The Association of National Numbering Agencies lists the Securities and Exchange Board of India as India’s National Numbering Agency. The application and operational process may differ depending on the type of security being issued.
Once assigned, the ISIN can be used in depository records, account statements and other market systems. This allows different participants to identify the security without relying only on its name.
Source: Association of National Numbering Agencies, Member List, 12 June 2026.
Why is an ISIN useful to investors?
Investment names can be long, abbreviated or very similar. An ISIN offers a more precise way to identify the security being held, transferred or reviewed.
It can help investors:
- Match a security with the entry shown in a demat or account statement
- Distinguish between securities with similar names
- Verify a mutual fund plan and option
- Check records while transferring eligible securities
- Reconcile differences across investment statements
- Refer to the correct security when raising a service request
- Reduce the possibility of selecting the wrong instrument because of a similar name
An ISIN is particularly useful as a verification tool. It should, however, be checked alongside the complete security or scheme name rather than used in isolation.
How is an ISIN used in securities transactions?
An ISIN helps market participants identify the security involved at different stages of a transaction. Depositories, exchanges, brokers and other intermediaries may use it while recording holdings, settling trades and processing eligible transfers or pledges.
The identifier can also help connect corporate actions, such as bonus or rights issues, with the relevant security. Investors may therefore see an ISIN in demat statements, transaction records and other securities-related documents.
Source: CDSL, Demat CDSL Way: General FAQs, January 2022.
How does an ISIN work for mutual funds?
A mutual fund scheme may offer more than one plan or option. Although these variants belong to the same broader scheme, they may represent separately identifiable units and carry different ISINs.
For example, an investor may need to distinguish between:
- Direct and Regular plans
- Growth and applicable Income Distribution cum Capital Withdrawal options
- Payout, reinvestment or other available IDCW facilities
- Other separately identifiable variants under the scheme
This makes the ISIN useful when mutual fund units are held in demat form or when an investor is checking scheme records. It helps confirm the exact plan and option rather than only the broader scheme name.
Current AMFI scheme records show separate ISINs for different Direct and Regular plan options within the same scheme.
Source: AMFI, Scheme Summary Document.
Why can one mutual fund scheme have multiple ISINs?
A scheme name may describe the broader investment portfolio, but its plans and options can differ in features such as expense structure or distribution treatment.
Direct and Regular plans, for example, invest in the same underlying portfolio and are managed by the same fund manager, but they have different expense structures. Their separately identifiable units may therefore carry different ISINs. Investors should verify the exact plan and option shown in their records.
How to find the ISIN of a mutual fund
You can locate the ISIN of a mutual fund through several official records and platforms:
- AMC documents: Check the scheme-related documents and disclosures available on the asset management company’s website.
- Scheme Summary Document: The document may list the ISINs assigned to the scheme’s plans and options.
- Consolidated Account Statement: Where displayed, the ISIN can help match the investment with the corresponding scheme holding.
- Demat statement: If the units are held in demat form, the statement generally shows the security details and associated ISIN.
- Depository records: ISIN search facilities and depository records may be used to verify the security.
- Registrar and Transfer Agent: The authorised RTA can help with scheme and holding-related records.
- AMFI records: Scheme information and documents available through AMFI may contain the relevant identifier.
Before using a code, check that the source is current and that the complete scheme, plan and option match your investment.
ISIN vs folio number scheme code and trading symbol
These identifiers serve different purposes and should not be used interchangeably:
| Identifier | What it identifies | Key distinction |
| ISIN | A particular security | A standardised 12-character identifier used in securities-market records |
| Folio number | An investor’s account or holdings with a mutual fund | Linked to the investor rather than to the identity of the security |
| Mutual fund scheme code | A scheme or option within a particular mutual fund system | Its use and format depend on the system maintaining the code |
| Trading symbol | A security traded on an exchange | Used to recognise the instrument on a particular trading platform |
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Two investors holding the same mutual fund units may have different folio numbers but the same ISIN for that plan and option. Conversely, units held by one investor under different plans or options may carry different ISINs.
How to verify an ISIN before using it
A 12-character code can be easy to mistype, especially when several scheme variants have similar names. Before relying on an ISIN, check:
- The name of the asset management company
- The complete mutual fund scheme name
- Whether the holding is under the Direct or Regular plan
- Whether it is the Growth or applicable IDCW option
- All 12 characters of the ISIN
- The latest official document or account record
- Whether the code belongs to the security you intend to identify
Avoid copying an ISIN from an unofficial website or an old document without checking it against a current official record. A code that differs by one character may correspond to another security or fail validation.
What an ISIN does not tell you
An ISIN only identifies the security. It does not evaluate the security or indicate whether it is suitable for your needs. An ISIN does not indicate:
- The investment’s risk level
- Its expected or future returns
- Whether the security is suitable for a particular investor
- The quality of the underlying portfolio
- The expense ratio of a mutual fund plan
- The current value of the investment
- Whether the investment should be bought, retained or sold
Investors should review the scheme’s investment objective, riskometer, costs, portfolio, investment horizon and other relevant information separately. Those learning how to invest in mutual funds should not treat an ISIN as a substitute for evaluating the scheme itself.
Conclusion
An ISIN gives each eligible security a precise, standardised identity. For mutual fund investors, checking the code can help distinguish between plans and options with similar names. Always match it with the latest official scheme or account record before using it.
FAQs
What is the full form of an ISIN number?
The ISIN full form is International Securities Identification Number, a standardised code used to identify a particular financial security.
How many characters are there in an ISIN?
An ISIN has 12 alphanumeric characters comprising a two-letter country code, a nine-character security identifier and one numerical check digit.
Can one mutual fund have multiple ISINs?
Yes. Different plans or options within the same mutual fund scheme may have separate ISINs if they represent separately identifiable securities.
Is the ISIN the same for Direct and Regular plans?
Investors should not assume that it is. Direct and Regular plans may have different ISINs, so each plan should be verified independently.
Where can I find an ISIN number?
You may find it in official scheme documents, AMFI records, a consolidated account statement, a demat statement or authorised depository records.
Who issues ISIN codes in India?
SEBI is listed as India’s National Numbering Agency. ISINs are assigned under the applicable process after the required security details are submitted.
What is the difference between an ISIN and a mutual fund scheme code?
An ISIN is a standardised identifier for a security. A scheme code identifies a mutual fund scheme or option within a particular operational system.
Is an ISIN the same as a folio number?
No. An ISIN identifies the security, while a folio number identifies an investor’s account or holdings with a mutual fund.
Does an ISIN show whether a mutual fund is suitable?
No. It only identifies the security. Suitability depends on factors such as the scheme objective, risk, investment horizon and the investor’s circumstances.
Can an unlisted security have an ISIN?
Yes. An unlisted security may have an ISIN if the identifier has been assigned and the security has been admitted into the applicable depository or identification system.
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