Portuguese dual citizenship: can you keep your nationality?

Does Portugal require renunciation of an earlier nationality?

Separate two questions: what Portugal permits and what the other state requires. A positive answer to the first does not settle the second. List every nationality already held and the Portuguese route you intend to use. Eligibility to apply does not mean that Portuguese nationality has already been granted. The confirmed answer below describes Portugal’s position without promising automatic retention of any other nationality in every circumstance, regardless of another state’s own legislation.

What should you check with your other country?

Locate the official nationality authority and that country’s consular service. Ask about retention, any notification, documents and consequences relevant to the intended acquisition. Record the date and legal provision given in the reply. An article written for another nationality may help formulate questions but cannot establish your rule. This guide invents no common notification deadline across all countries and does not advise precautionary renunciation simply to make preparing an application seem easier or more straightforward.

Loss by declaration is a separate decision

Permission to hold multiple nationalities does not remove loss provisions from the law. A loss declaration is separate from preparing a citizenship application. Do not sign a document you do not understand as though it were routine administration. If a body requests a declaration about nationality, identify its purpose and intended effects first. The provision below is not an exhaustive catalogue of every validity issue, nor an instruction to submit renunciation as part of an ordinary application.

Citizenship, passport and residence documents have different roles

Sort records by purpose: proof of nationality, travel document and residence documentation. Different expiry dates should not imply that all documents have identical legal effects. If one form asks about nationalities and another asks which passport was used, answer the actual question without concealing earlier identities. For differing names, collect evidence explaining the sequence instead of editing scans to force a visual match. Keep copies and references organised so the discrepancy can be assessed properly.

Dual citizenship does not by itself settle taxation

For a tax question, describe where you live, where income arises and the issue to clarify with the competent authority. Holding two passports is not sufficient evidence of an exemption, tax residence or absence of obligations. This article calculates no tax and applies no treaty to an individual case. Keep nationality records separate from tax and social-security enquiries so that each question reaches the appropriate service with the relevant circumstances, rather than relying on the passport count.

Illustrative scenario: verify before making a decision

A person considering Portuguese citizenship receives conflicting advice about abandoning an earlier nationality. They gather official sources from both states and seek an answer about their circumstances before signing a declaration. This is an editorial scenario without a real client or guaranteed result. A table identifying country, authority, provision, date and unresolved question helps prevent advice about a different nationality from becoming a supposed rule for their own position or an irreversible personal decision.

• Portuguese citizenship through marriage or partnership: requirements and documents

Next step: identify the right Portuguese application route

After clarifying coexistence of nationalities, check the Portuguese application ground. Residence, marriage and descent do not share one universal checklist. Follow the corresponding guide, prepare appropriate records and retain replies from the other state. The Justice guide explains Portuguese permission, but does not replace foreign legislation. Nothing here constitutes a renunciation, official declaration, nationality grant or universal border instruction about which passport to use. Keep the verified answer connected to its country and specific question.

• Portuguese citizenship: how many residence years in 2026?

• Check Portugal’s position on holding other nationalities.

  Official sourceJustiça / IRN · Como obter a nacionalidade portuguesa

• Read Portuguese law and distinguish acquisition from loss by declaration.

  Official sourceDiário da República · Lei Orgânica n.º 1/2026, de 18 de maio

Sources and scope of this guide

Official sources support the stated legal, language and certification facts. Plans, examples and checklists are independent editorial suggestions, not instructions from an authority.

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