Spain dual citizenship: allowed, but restricted
Spain receives a limited rating of 70 out of 100 points for allowing dual citizenship. The rating fits because multiple citizenship is not treated as broadly open in Spain as it is in countries that generally accept more than one nationality.
For migrants, this is important. Spain can be an attractive long-term residence country, but the later step toward citizenship may affect the previous nationality depending on the country of origin. That should be checked long before naturalization.
What the measured value means
The underlying value is a legal classification: multiple citizenship is possible in Spain, but restricted. Nomadino is not measuring how difficult naturalization itself is here; it is measuring whether a person can generally keep more than one nationality after naturalization.
Spain is not rated very weakly because important exceptions and special relationships exist. The rating is still clearly below generally open systems because many applicants may face renunciation declarations, origin-country rules or special-case analysis.
General rule and special origin groups
Spanish nationality law treats people differently depending on origin. Certain countries with historical or legal links receive more favourable treatment. This can include Ibero-American states and other specifically recognized groups.
For other applicants, the question can be more complicated. Naturalization may involve a requirement to renounce the previous nationality, or at least a declaration to that effect. Whether this actually causes loss of nationality depends on the law of the origin country as well.
Why origin country matters
Dual citizenship is never only a Spanish-law question. The other country still decides whether its own nationality is retained, lost automatically or kept only with prior permission.
This makes Spain practically complex. Two people with the same residence period and Spanish naturalization profile can face very different consequences if their origin countries treat multiple citizenship differently.
Planning before naturalization
Anyone living in Spain long term should check early whether their existing nationality can be protected. Nationality law, consular guidance, retention permissions, deadlines, child status, marriage, place of birth and existing multiple citizenship can all matter.
Families should also check whether children have different rules from parents. Travel, military obligations, tax residence, inheritance and consular protection can be affected by multiple nationalities.
A good strategy separates three questions: Can I apply for Spanish citizenship? Can I keep my current nationality? And does my origin country also recognize that combination?
Timing can matter as much as eligibility. Some countries require permission before naturalizing abroad, while others only record the loss afterwards. Applicants should therefore check declarations, consular notifications and Spanish application steps before taking irreversible action.
People who already hold more than one nationality should be especially careful. Adding Spanish citizenship can interact differently with each existing nationality, and one country may allow an outcome that another country treats as a loss event.
Because the consequences can be personal and hard to reverse, this indicator should be read as an early warning to research nationality law before relying on a future Spanish passport plan.
It is a planning issue, not just a final formality at the citizenship appointment.
What this indicator does not measure
This indicator does not measure time to Spanish naturalization, language or integration tests, or the strength of the Spanish passport. Those are separate indicators.
The practical conclusion is that Spain is not closed to multiple citizenship, but it depends much more on origin, exceptions and reciprocity than very open nationality systems do.
Frequently Asked Questions
Does Spain always allow dual citizenship?
No. It is possible or practically recognized in some situations, but not equally open for all origin countries.
Is Spanish law enough to answer the question?
No. The origin country must also be checked because it controls loss or retention of its own nationality.
Are Ibero-American nationals treated differently?
Some origin groups have more favourable rules or special treatment. The exact position should be checked through official sources.
Why is the rating lower despite exceptions?
Because openness is not general, and many applicants need to deal with restrictions or additional review.
Related indicators
- 🏠 Time to Permanent Residency or Citizenship in Spain
- 👪 Family Reunification in Spain
- 📜 Naturalization Requirements in Spain
- 🛡 Residence Status Stability in Spain
Sources
- Spanish Ministry of Justice - nationality and naturalization
- Spanish Official State Gazette - Civil Code and nationality rules
- Spanish Ministry of Foreign Affairs - consular information
This article was created on June 26, 2026
