How Portuguese Citizenship Works Alongside US Citizenship: Dual Nationality for American Investors

One of the most common questions American families ask as they approach the end of the five-year Portugal Golden Visa residence period is: "Can I become a Portuguese citizen and keep my US citizenship?"

The short answer is yes, with important nuances. Both Portugal and the United States generally permit dual nationality, which means that obtaining Portuguese citizenship does not require you to renounce your American citizenship, and vice versa. But the practical implications of holding two citizenships involve tax obligations, passport use, and family considerations that every American investor should understand.

This article explains how dual nationality generally works in practice for American Portugal Golden Visa investors. For personalized guidance on the citizenship pathway, Golden Path Investment’s Program Fit Check helps you understand the full timeline and implications.

Does Portugal Allow Dual Citizenship?

Yes. Portugal generally permits dual and multiple nationality. Portuguese law does not require its citizens to renounce other citizenships they hold. You can become a Portuguese citizen while retaining your US passport and any other citizenships you may hold.

This has been the case for many years and is a settled aspect of Portuguese nationality law. It is one of the reasons Portugal is often considered attractive for American investors who value long-term optionality through the Portugal Golden Visa.

Does the United States Allow Dual Citizenship?

The United States generally does not require US citizens to renounce their citizenship when they acquire another nationality. Millions of Americans hold dual citizenship with various countries, though specific circumstances around acquisition can have nuances and should be reviewed with an immigration attorney where relevant.

In practical terms, the US will continue to treat you as a US citizen for all purposes (including tax obligations) regardless of whether you also hold Portuguese citizenship. The US government acknowledges dual citizenship as a fact but does not actively encourage it as a matter of policy.

What Dual Citizenship Means in Practice

Two passports

As a dual citizen, you would hold both a US passport and a Portuguese (EU) passport. The Portuguese passport provides visa-free access to a large number of countries worldwide as well as the right to live and work anywhere in the European Union. The practical benefit is expanded global mobility and optionality for your family.

Passport use guidelines

Dual citizens typically use their US passport when entering and leaving the United States (this is required by US law for US citizens) and their Portuguese passport when entering the EU or countries where the Portuguese passport offers easier access. When traveling to third countries, you can choose whichever passport offers better terms in that situation.

US tax obligations continue

This is the most important practical point for Americans: the United States taxes its citizens on worldwide income regardless of where they live or what other citizenships they hold. Becoming a Portuguese citizen does not change your US tax obligations. You will continue to file US tax returns, report foreign accounts (FBAR/FATCA), and comply with all IRS requirements.

For a detailed look at the tax implications, see Portugal Golden Visa and US Taxes.

Portuguese tax considerations

Holding Portuguese citizenship does not automatically make you a Portuguese tax resident. Tax residency in Portugal is generally determined by physical presence (183 days) or habitual residence, not by citizenship. Many dual citizens continue to live primarily in the US and maintain their tax residency there. However, if you choose to live in Portugal after obtaining citizenship, the tax implications change significantly and should be reviewed with a cross-border tax specialist.

What About Renouncing US Citizenship?

Some Americans consider whether to renounce their US citizenship after obtaining Portuguese citizenship. This is a major decision with significant and potentially irreversible consequences:

• Exit tax: the US can impose an expatriation tax on certain individuals who renounce citizenship, particularly those who meet specific net worth or income thresholds. The application of this tax is calculated under specialized rules, and it can result in substantial tax liability in some cases. The specific application depends on individual circumstances and should be evaluated with a cross-border tax specialist before any decision is made.

• Loss of US rights: renouncing US citizenship means permanently giving up the right to live and work freely in the United States, US consular protection abroad, and US voting rights.

• Immigration implications: after renouncing, you would generally need a visa to visit or live in the United States, subject to standard immigration rules.

For most American Portugal Golden Visa investors, dual citizenship provides the benefits of holding both nationalities without requiring a difficult and consequential renunciation decision. Whether renouncing US citizenship makes sense in a particular case depends entirely on individual circumstances, and should be considered only after detailed consultation with both immigration counsel and a cross-border tax specialist.

Dual Citizenship and Your Family

One of the most powerful aspects of dual citizenship is its generational impact. Portuguese citizenship obtained by a parent may, in certain circumstances, be transmitted to children. This means that the Portugal Golden Visa journey that begins with one generation can create EU citizenship rights that extend to future generations.

The specific rules around citizenship transmission depend on individual circumstances and current Portuguese nationality law, and should be confirmed with a qualified advisor. For a broader view of how the Portugal Golden Visa serves as a generational strategy, see the Generational Mobility Strategy for American Families.

The Path to Dual Citizenship Through the Portugal Golden Visa

Here is how the timeline typically works:

For full details on the citizenship application process, see What Really Happens at Year 5.

Note on citizenship timelines: As of early 2026, the five-year rule remains in effect. However, Portugal’s Parliament approved a reform in October 2025 that could extend this timeline for certain nationalities. The Constitutional Court returned the law for revision. Permanent residence after five years is not affected by the proposed changes. Confirm the current rules with your advisor.

How Golden Path Investment Supports the Citizenship Journey

Golden Path Investment provides renewal management and citizenship guidance as core services. With a 95% approval rate and over 500 families supported, we help American families navigate the full journey from initial investment through dual citizenship. Our services include eligibility assessment and program matching, complete application management and AIMA liaison, compliance support throughout the residence period, and coordination with specialist partners for cross-border tax advisory. The citizenship stage is where all of these workstreams converge.

If you have questions about dual citizenship or want to understand how the Portugal Golden Visa fits your family’s long-term plan, speak with a Golden Path specialist. A short conversation can clarify the timeline, requirements, and practical implications.

As a member of the Investment Migration Council and the American Chamber of Commerce Portugal, Golden Path Investment operates with transparent pricing and structured guidance from initial consultation through citizenship.

Dual citizenship is one of the most valuable outcomes of the Portugal Golden Visa journey. Golden Path Investment’s Program Fit Check maps out the complete path from investment through dual nationality, so your family can plan with confidence.