What Is a Corporate Identification Number (CIN)?
A Corporate Identification Number (CIN) is a unique 21-digit alphanumeric identifier assigned by the Ministry of Corporate Affairs (MCA) to every company registered in India under the Companies Act, 2013 (or its predecessor, the Companies Act, 1956).
Structure of a CIN
A CIN encodes several pieces of information within its 21 characters: whether the company is listed or unlisted, the state of registration, the year of incorporation, the industry/sector classification code, whether it's a private or public company, and a unique 6-digit registration number.
Why CIN Matters for HR
- CIN is required on several official HR and compliance documents, including appointment letters, offer letters, and statutory filings, as part of standard corporate identification practice.
- Used to verify a company's legal registration status — useful during due diligence for M&A-related HR integration or when validating a vendor/staffing partner's legitimacy.
- Required when filing various statutory compliance documents that reference the employing entity's corporate registration.
How to Find a Company's CIN
A company's CIN can be found on the MCA's official portal (mca.gov.in) using the company name search, on the company's official letterhead, incorporation certificate, or annual filings such as the Annual Return and Balance Sheet.
Corporate Identification Number (CIN): Frequently Asked Questions
Do all businesses in India have a CIN?
Can a company's CIN change over time?
This glossary entry is for general information and reflects common HR practice in India at the time of writing. Statutory thresholds, rates and deadlines change — verify against the latest official notifications or consult a qualified legal or tax advisor before acting.