A PAN (Permanent Account Number) is a ten-digit alphanumeric number, issued in the form of a laminated card, by the Income Tax Department. The following people must obtain a PAN:

• All existing assesses or taxpayers or persons who are required to furnish a return of income, even on behalf of others.
• Any person, who intends to enter into financial transaction where quoting PAN is mandatory.

An overview of PAN Card is available at the Govt. Of India Income Tax Department.

On-line Application for New PAN Card can be obtained from this NSDL Site.