TIN (Tax Identification Number)

Tax Identification Number is a generic term used internationally for whatever unique reference a country assigns to a taxpayer. It is not, in itself, an Indian document. Different countries implement it differently: the United States uses a Social Security Number or an ITIN, the United Kingdom a Unique Taxpayer Reference, and India uses the Permanent Account Number.

So for Indian income tax purposes, PAN is the tax identification number. When a foreign bank, employer, brokerage, or tax authority asks an Indian resident or an NRI for their Indian TIN, the correct answer is the PAN. This comes up constantly in foreign account opening paperwork, FATCA and CRS self-certification forms, and treaty documentation.

PAN should not be confused with TAN, which is a separate ten-character number issued to entities responsible for deducting or collecting tax at source. A business typically holds both: PAN as its own taxpayer identity, and TAN for its obligations as a deductor when depositing TDS and filing TDS returns. Quoting one where the other is required is a routine cause of rejected challans and mismatched credits.

There is a historical source of confusion worth clearing up. Before GST, state VAT authorities issued their own eleven-digit identifier that was itself commonly called a TIN. That number belonged to the indirect tax system and had nothing to do with income tax. It has been superseded by GSTIN, so a reference to a 'TIN' in older Indian commercial documents may well mean the old VAT number rather than PAN.

For NRIs the question usually arises in both directions. Indian paperwork may ask for the tax identification number of your country of residence, which is that country's own reference, while foreign paperwork asks for your Indian one, which is your PAN. Where treaty benefits are being claimed, a tax residency certificate from the country of residence and Form 10F generally accompany the PAN, and arranging these in advance is what allows a lower withholding rate to be applied at source rather than reclaimed later.