Tax identification numbers in Europe.
A tax identification number is an identifier used by a public authority to link a person or an organisation to tax-related records. Across Europe, the name and format differ by country, but the role is consistent: supporting administration, reporting, and identity matching in official processes. This site explains what tax identification numbers are, how they are commonly structured, and where they are used.
This site does not check or confirm any identifier. It does not validate, certify, or provide results. It is an independent reference site and is not affiliated with any government authority.
1) What it is
Definition, purpose, and who uses tax identifiers in administrative systems.
2) How it's structured
Common format patterns and country variation, explained without checks or lookups.
3) Where it's used
Typical contexts: tax filings, employment, banking, and cross-border administration.