What is a tax identification number (TIN)?
A TIN is a national identifier used by a tax administration to link a person or entity to tax records. There is no single EU-wide TIN. Each country issues its own identifier and uses it in domestic processes and cross-border reporting.
Core purpose
Administrations use identifiers to connect filings, payments, and compliance actions to the right taxpayer. In practice, TINs are also used as an administrative key in non-tax workflows where identity must be precise.
- Link records: connect income, withholding, and declarations to one taxpayer profile.
- Reduce errors: structured identifiers help detect typos and mismatches early.
- Exchange data: support reporting between jurisdictions under information exchange frameworks.
TIN vs VAT number
VAT numbers identify taxable persons for VAT. Personal TINs identify individuals for income tax and related administration. They can overlap in some countries, but they are not interchangeable concepts.
| Topic | TIN | VAT number |
|---|---|---|
| Primary target | Individuals or entities, depending on country | Businesses and taxable persons |
| Public visibility | Often restricted for individuals | Often intended to be shared on invoices |
| Common context | Income tax, residency, reporting | Invoicing, intra-EU supply rules |
Why formats differ
Countries designed their identifiers for different administrative goals. Some are purely numeric for easy storage, while others encode information or include a checksum to catch mistakes.
- Numeric-only: fast data entry, high compatibility.
- Alphanumeric: more expressiveness, sometimes includes embedded meaning.
- Checksums: help detect transposed digits and common typos.
Common names by country
People often search for the local name rather than the generic term "TIN". These examples help you map terminology to the same concept.
| Country | Common name | Notes |
|---|---|---|
| Germany | Steuer-ID | 11 digits, lifelong personal identifier. |
| France | Numéro fiscal | Often shown on tax notices and online tax portals. |
| Italy | Codice Fiscale | 16 characters, alphanumeric pattern. |
| Spain | DNI / NIE | DNI for citizens, NIE for foreign residents. |
| Netherlands | BSN | 9 digits, used broadly in public services. |