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Portuguese Tax Identifier or Code

Published on Sep 2, 2026

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NIF (Número de Identificação Fiscal), which is also referred to as the contribution number (“Número de contribuinte”) is a unique 9-digit Individual Tax Identification Number issued by the tax authorities of Portugal.

Validator

Portugal Tax Identification Number — Validates the position weighted Mod 11 checksum.

Matched expressions

Regex expressions	Description	Score
`(?:\b[0-9]{9}\b)`	Matches a 9-digit number of the format NNNNNNNNN.	1

Ignored expressions

None

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