Aadhaar vs PAN Card — What's the Difference?

Aadhaar and PAN are the two most important Indian IDs — but they aren't interchangeable. This guide clears up what each does and when you need it. For how to apply, see our Aadhaar guide and PAN guide.

What is Aadhaar?

Aadhaar is a 12-digit identity number issued by UIDAI to residents of India. It's primarily proof of identity and address, and is used for subsidies, KYC, SIM cards, and many government services.

What is PAN?

PAN (Permanent Account Number) is a 10-character number from the Income Tax Department. It's tied to your financial and tax identity — filing returns, high-value transactions, opening certain accounts and investments.

Aadhaar vs PAN at a glance

• Issued by: Aadhaar → UIDAI; PAN → Income Tax Department.
• Main purpose: Aadhaar → identity & address proof; PAN → taxes & finance.
• Format: Aadhaar → 12 digits; PAN → 10 characters (letters + digits).
• Who needs it: Aadhaar → all residents; PAN → anyone with taxable income or major financial activity.

Do they need to be linked?

Yes. Linking PAN with Aadhaar is mandatory for most taxpayers — an unlinked PAN can become inoperative. See our step-by-step PAN–Aadhaar link guide.