Short answer

Start with the article supporting your application. “Knowledge is required” and “a specific examination is required” are different questions. The checked sources do not establish a single procedure for every situation.

Confirmed by official source

Article 6(1) governs general naturalisation. The law also refers grandchildren of Portuguese citizens (Article 1(3)) and certain naturalisation routes to knowledge requirements. One rule cannot be applied to every route.

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General residence-based naturalisation

The requirements are cumulative. Studying topics does not replace residence periods, documents or the other statutory conditions. Check your current nationality and residence timeline before choosing preparation materials.

Confirmed by official source

For general naturalisation, the minimum is 7 years of legal residence for nationals of Portuguese-speaking countries and EU citizens, and 10 years for nationals of other countries.

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Confirmed by official source

General naturalisation requires sufficient knowledge of Portuguese language and culture, national history and symbols, plus fundamental rights and duties and the political organisation of the Portuguese State.

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Confirmed by official source

General naturalisation includes a solemn declaration of adherence to the fundamental principles of the democratic rule of law.

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Descent and other routes

For grandchildren, the law refers to specific paragraphs of Article 6. Marriage and de facto partnership use a different legal structure. A cross-reference does not establish a universal assessment mode: check the applicable provision and IRN instructions.

Confirmed by official source

Article 6(1) governs general naturalisation. The law also refers grandchildren of Portuguese citizens (Article 1(3)) and certain naturalisation routes to knowledge requirements. One rule cannot be applied to every route.

Last checked:

If an application was already pending

Keep evidence of submission and check how the procedure was registered. The transitional regime applies to the actual procedure; the date you started collecting documents is not enough.

Confirmed by official source

Administrative procedures pending on 19 May 2026 remain governed by the previous wording of the Nationality Law.

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