You can hold dual citizenship in Mexico without giving up your current nationality, and you generally get there through one of three routes: claiming Mexican nationality by descent if you have a Mexican parent or ancestor, naturalizing after two years of legal residency if you’re married to a Mexican citizen, or naturalizing after five years of legal residency on your own. Which route fits you depends on your family background and how long you’ve lived in the country.
Mexico has permitted dual nationality since a 1998 constitutional reform. Before then, Mexicans who took another citizenship lost their Mexican one; that is no longer the case. The Mexican government does note that holding two nationalities creates obligations in both countries, and that on Mexican soil Mexico treats you as Mexican first — you cannot invoke your other citizenship to sidestep Mexican legal obligations.1Secretaría de Relaciones Exteriores. Double Nationality
The Three Paths, Compared
The paths differ in who qualifies, where you apply, and how long it takes.
- By descent: For people born abroad to a Mexican parent (or, since a 2021 reform, a more distant Mexican ancestor by birth). Handled at a Mexican consulate. No residency required.
- By marriage: For spouses of Mexican citizens. Requires two consecutive years of legal residency in Mexico and a naturalization exam.
- By residency: For everyone else. Requires five consecutive years of legal residency, reduced to two for certain categories.
Path 1: Mexican Citizenship by Descent
If you were born outside Mexico to at least one Mexican parent, Article 30A of the Mexican Constitution already gives you the right to Mexican nationality by birth. You are not naturalizing; you’re registering a status you already have.
A 2021 constitutional reform widened this considerably. Before the change, Mexican nationality could pass only one generation to children born abroad. Now transmission is unrestricted across generations of descendants born outside Mexico, as long as at least one ancestor in the line was Mexican by birth.2Gobierno de México. The Foreign Ministry Strengthens the Right to Mexican Nationality Among Mexican Communities in Latin America and the Caribbean So a grandchild or great-grandchild of a Mexican-born citizen can now claim nationality by descent, where before they could not.
What to bring
The core documents are your Mexican parent’s (or ancestor’s) birth certificate or valid Mexican ID, and your own long-form birth certificate showing parents’ nationalities and places of birth. If your birth certificate was issued outside Mexico, it needs an apostille and a certified Spanish translation. Bring valid photo ID for everyone appearing, plus two letter-size photocopies of every original.3Consulado General de México en Boston. Obtaining Mexican Nationality by Birth For a minor, both parents typically need to appear.
Where to apply
If you live abroad, the entire process runs through your nearest Mexican consulate. Appointments go through an online platform called MiConsulado, where you upload digital copies of your documents before the in-person visit. You do not need to travel to Mexico or file with the SRE headquarters to claim nationality by descent.
Path 2: Naturalization Through Marriage
If you’re married to a Mexican citizen, you can apply for naturalization after two consecutive years of legal residency in Mexico.4Library of Congress. Mexico – Obtaining Nationality by Naturalization The residency must be continuous and covered by valid permits for the full period. A temporary resident visa for spouses of Mexican citizens is the usual starting point, and Mexican consulates can issue one before you move.
You’ll need your marriage certificate, recognized in Mexico. If you married abroad, that means an apostille and a certified Spanish translation. You’ll also sit for a government-administered exam covering basic Spanish proficiency and knowledge of Mexican history, geography, and civics.
Path 3: Naturalization Through Residency
Without Mexican family ties, the standard route requires five consecutive years of legal residency. The clock starts on the effective date of your residency permit, not your first visit.
Several categories qualify for a reduced two-year residency requirement instead:4Library of Congress. Mexico – Obtaining Nationality by Naturalization
- Direct descendants of a Mexican citizen by birth who don’t qualify for nationality by descent
- Parents of children who are Mexican by birth
- Nationals of a Latin American country or a country on the Iberian Peninsula (Spain and Portugal)
- People who have made notable contributions to Mexico in cultural, scientific, technical, artistic, or social fields, as determined by the SRE
All naturalization applicants, regardless of the timeline, must demonstrate Spanish proficiency, knowledge of Mexican culture and history, and good conduct, and must show financial stability through tax records or proof of income.
Documents and Translations
Every foreign-issued document has to be apostilled (or legalized, for countries not party to the Hague Apostille Convention) and translated into Spanish by a certified translator. In the United States, state-level apostille fees typically run between $10 and $26, and certified Spanish translations of documents like birth or marriage certificates generally cost $20 to $79 per page.
For descent claims, expect to bring the Mexican parent’s or ancestor’s birth certificate or national ID, your long-form birth certificate, and valid photo ID for everyone involved.3Consulado General de México en Boston. Obtaining Mexican Nationality by Birth
For naturalization, add proof of legal residency for the full required period, your marriage certificate if applying through marriage, tax records or other proof of income, and a certificate showing no criminal record during your residency. Gather more than you think you need. The SRE frequently requests additional supporting materials during review, and a missing document can add months.
How the Application Works
Naturalization applications go to the Secretaría de Relaciones Exteriores (SRE), Mexico’s foreign ministry. If you’re in Mexico, you file in person at the designated SRE office. If you’re abroad, Mexican consulates can accept the application, but the SRE in Mexico City reviews and decides it.5U.S. Embassy & Consulates in Mexico. Dual Nationality
Fees vary by pathway and are updated annually, so check the SRE website or your nearest consulate for the current amount before applying. After you submit, the SRE verifies your documents, cross-references government databases, and may schedule an interview or contact local authorities to confirm details. Review commonly takes several months and stretches longer if the SRE asks for more paperwork. Once approved, you receive a certificate of Mexican nationality (for descent) or a naturalization letter.
What Changes Once You’re a Dual Citizen
Mexican citizenship gives you the right to vote in Mexican elections, work without a permit, and access public services like IMSS healthcare and public education. It also removes the restrictions foreigners face on owning property in the “restricted zone” within 50 kilometers of the coastline and 100 kilometers of international borders.1Secretaría de Relaciones Exteriores. Double Nationality
Mexican law also requires men to register for military service (the Servicio Militar Nacional) and obtain a cartilla militar. This applies to male dual citizens, though enforcement against those living permanently abroad is limited in practice.
Taxes: the part people underestimate
Mexico taxes residents on worldwide income. The United States taxes its citizens on worldwide income regardless of where they live. If you hold both nationalities and earn income, both governments may want to hear about the same money. A bilateral tax treaty between the two countries provides mechanisms like foreign tax credits to prevent actual double taxation,6Internal Revenue Service. United States-Mexico Income Tax Convention but it does not eliminate filing obligations in either country.
US citizens and permanent residents with Mexican bank accounts or financial assets face two separate reporting requirements. The FBAR (FinCEN Form 114) is required if the combined value of your foreign accounts exceeds $10,000 at any point during the year. FATCA reporting on IRS Form 8938 kicks in at higher thresholds that depend on where you live and your filing status: single filers in the US report if foreign financial assets exceed $50,000 at year-end or $75,000 at any point, while single filers living abroad have thresholds of $200,000 and $300,000. Married filing jointly doubles those figures. “Foreign financial assets” covers more than bank accounts, including stocks, securities, and interests in foreign companies. Penalties for failing to file either report are severe, and if you have any financial footprint in Mexico, work with a tax professional who understands both systems.
Inheritance, family law, and property rules can also differ meaningfully between Mexico and your other country of citizenship. If you own property or have family in both, sorting those questions out with a lawyer who practices in both jurisdictions before a problem appears is far cheaper than untangling one after.