Why CIN Matters: Uses & Where to Quote It
Disclaimer: This article is for general information/education and is not investment advice. The information is shared in good faith and for general informational purposes only. Ujjivan SFB does not make any representations or warranties regarding the accuracy, completeness, or reliability of the content.
October 01, 2026

A Corporate Identification Number (CIN) is a unique 21-character alphanumeric code assigned to an entity after its incorporation with the Registrar of Companies (ROC) under the Ministry of Corporate Affairs (MCA). Once the incorporation is approved, the entity becomes a company and must follow the applicable corporate compliance requirements. The CIN helps identify the company in MCA records, corporate filings, and official company information.
This blog takes you through the uses of a CIN and where companies need to mandatorily mention it.
What Information Does a CIN Contain?
A CIN has 21 alphanumeric characters where each part carries specific information about the company. For example, consider the CIN U12345TG2026PLC123456:
Apart from the information a CIN itself carries, using the CIN on the MCA portal can help you access more information about the company. Some company information is available for public viewing, while access to certain records or services may require you to log in to the portal.
What is the Purpose of CIN?
CIN acts as a unique company identifier for various corporate, regulatory and business purposes.
1. For Different MCA Filings
A company needs to file certain information with the MCA during its business operations. These filings may be annual, periodic or event-based, depending on the company's compliance requirements and any changes in its business or structure. The CIN helps the MCA identify the company and link these filings to its records.
Some common MCA filings include:
2. To Apply for Banking Products
When a company opens a bank account to hold and use its business funds, the bank may ask for its CIN to verify the company's identity and registration details. Similarly, when a company applies for a business loan or other banking and financial products, the CIN may be used as a corporate identifier during the verification and documentation process.
3. To Respond to Government Notices
When a company receives a compliance, legal or public notice from a government authority or other authorised body, it may need to mention its CIN while responding. The CIN helps identify the company and link the response to the correct corporate records.
For notices related to specific directors, the Director Identification Number (DIN) may also be required along with the relevant director’s details.
4. To Check Company Details
A CIN can help people find and verify company information through the MCA portal.
Where Should a Company’s CIN Be Mentioned?
As per the Companies Act, 2013, a company must mention its name, registered office address, and CIN, along with other prescribed details, on certain official documents and communications. These include:
The company must also mention its phone number, email address and website address, where applicable, along with these details.
Additionally, a company may choose to include its CIN in other places where it wants to clearly identify its legal entity, such as advertisements, its website, online business platforms and company listings.
How is CIN Different From PAN and GSTIN?
A company may have all three identifiers, and each one serves a different regulatory purpose.
These identifiers work separately, so having a PAN or GSTIN does not replace the need for a CIN for a company incorporated under the Companies Act.
Will a Company Receive Another CIN if Its Details Change?
A company may receive a new CIN when there is a change in details represented in the CIN or when a particular corporate change requires the CIN to be altered. The change is recorded through the MCA, and the company is allotted a revised CIN where applicable.
Changes that can result in a change in CIN include:
Routine changes, such as appointing a new director or changing the registered office address within the same state, do not by themselves require the company to obtain a new CIN.
Final Thoughts
A CIN is a unique identity for a company registered in India. It helps companies maintain their corporate records and complete applicable compliance, while giving banks, investors, business partners and others a way to verify company information. A CIN does not establish the quality of a company's products or services. It identifies the company behind the business, making it an important part of its corporate identity.
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