Most applications don't fail on the law. They fail on one piece of paper.
Mexican naturalization is handled by the Ministry of Foreign Affairs (SRE), not by immigration (INM). The rules themselves are clear. What trips people up is the appointment day: the SRE reviews your file on the spot, and if a single document is missing, expired or doesn't match, you can't step out to fix it. You book a new appointment and start over.
This guide is built around that reality. Get the file right once, and the rest is mostly waiting.
Which route is yours
The Nationality Law (article 20) sets the minimum time you must have lived in Mexico, counted back from the day you apply. Your time must be on a temporary or permanent resident card. Visitor stays don't count, and neither does a temporary student card.
| Route | Residence needed | What else you prove |
|---|---|---|
| General residence | 5 years | Nothing extra — this is the default route |
| Married to a Mexican | 2 years | Living together in Mexico for those 2 years, and the marriage itself at least 2 years old. Your spouse attends the appointment. |
| Child born Mexican | 2 years | Your child's Mexican birth certificate |
| Born in Latin America, Spain or Portugal | 2 years | Your birth certificate shows it |
| Direct descendant of a Mexican by birth | 2 years | The family line. Grandchildren with no other nationality can be exempt from the residence time. |
| Outstanding contribution | 2 years | Cultural, social, scientific, technical, artistic, sports or business work that benefits Mexico — at the SRE's discretion |
| Minors and adopted children of Mexicans | 1 year | Parental authority of a Mexican parent; no trips abroad in that year |
Route pages link to the SRE's official requirements, in Spanish.
The six-month rule. Trips abroad don't break your residence — unless, in the two years before you apply, they add up to more than six months (article 21). Count every day out of the country before you book anything.
Before you go down the descent route: if one of your parents was Mexican when you were born, article 30 of the Constitution recognizes you as Mexican by birth. You don't need to naturalize: what you need is to register your birth in Mexico (at a Mexican consulate, or by recording your foreign birth certificate with the Civil Registry). It's a different, simpler process — and we can help with that too.
Documents for the general route
Bring the original plus the copies listed. Each route adds its own documents (marriage certificate, your child's birth certificate, and so on); you'll find them on each route's official page, linked in the table above.
- Application form DNN-3 (SRE-02-011), which you download at the end of the online pre-registration. Original and a copy.
- Your resident card, original and two copies, showing your CURP. It must still be valid for at least six months after you apply.
- Foreign birth certificate, apostilled or legalized by a Mexican consulate () and translated into Spanish by a court-certified translator (perito traductor) in Mexico. Original and a copy.
- Passport, valid, with two legible copies of every page, covers included. If it's new, bring a full copy of your previous passport too, or an INM travel record (constancia de flujo migratorio) for the last two years.
- Sworn statement of every entry and exit from Mexico in the last two years, written in section X of the DNN-3 form.
- Federal criminal record certificate (constancia de antecedentes penales federales), original and copy, plus its QR validation printed twice.
- State criminal record certificate from the state where you live. Original and copy. See who issues it in your state.
- Bank receipt for the federal fee, original and copy, paid before your appointment.
Your address must match. The address on your DNN-3 has to be the same one INM has on file for you. If you've moved and never notified INM, fix that first.
Step by step
The whole process fits into four stages. Pick one to see its steps.
Stage 1 · Prepare
Confirm your route and count your days abroad
Use the routes table. If your passport stamps are incomplete, ask INM for your travel record so your sworn statement matches what the government has.
Start the slow documents first
The apostille (or legalization) comes from the country where you were born, and can take weeks if you're ordering it from abroad. . Once you have it, get the certified translation in Mexico. Leave the criminal record certificates for last so they're recent on your appointment day.
Pay the federal fee at a bank
Fill out the SRE's payment form (hoja de ayuda) and pay at any bank branch. The SRE won't receive an application without this receipt. In 2026 the fee is $9,500 MXN for every route.
Stage 2 · Apply
Pre-register online and book your appointment
- Go to the SRE's appointment page, register your email and follow the link it sends you.
- Fill in your details. Your CURP has to validate before you can continue.
- Choose your route, enter your address (the INM one), family, property in Mexico, work, and why you want Mexican nationality.
- Download the DNN-3 before choosing a date. Then pick a day at the main office in Mexico City or a regional SRE office.
Appointment day
- Arrive about ten minutes early. There's no grace period.
- Go alone — no one can attend for you. Married applicants come with their Mexican spouse; minors with their parents.
- Keep your phone put away inside the building.
- An officer reviews every document. If everything is complete, you take the history and culture exam and, if it applies, the Spanish exam.
- If you pass, they take your photo, fingerprints and signature. You get a receipt and, by email, a login to follow your case.
Stage 3 · Wait
The SRE consults INM and decides
The SRE asks the Ministry of the Interior, through INM, for its opinion on your case. By law, the SRE then has up to three months from that opinion to decide. If you applied at a regional office, the clock starts once your file reaches the central office. Follow your case with the login you received by email.
Stage 4 · Receive
Renunciation, oath and your Carta de Naturalización
Once the SRE decides to grant you nationality, you formally renounce your previous nationality and swear allegiance to Mexican law. Then you receive your naturalization letter, which takes effect the day after it's issued.
Do you lose your original citizenship? Mexico requires the renunciation, but it doesn't decide what happens to your other citizenship — your home country's law does. Here's how it works.
Your Mexican documents
Update your CURP, then apply for your Mexican passport and voter ID (INE).
The exam
The law asks you to show that you speak Spanish, know Mexican history, and are integrated into the culture. The SRE does this with two exams, given on your appointment day once your documents are accepted:
- History and culture of Mexico. The SRE publishes a study guide and bibliography — start there.
- Spanish language.
If you're over 60, a minor, or a refugee recognized by COMAR, you skip the history exam — but you still have to show you speak Spanish.
If you don't pass: you wait at least 15 business days and apply again. You get two attempts. Fail both and you must wait one year before a new application (SRE rule).
What it costs in 2026
The only fee the SRE charges is the naturalization fee. Everything else is paperwork you collect along the way.
| Item | Cost (MXN) | Notes |
|---|---|---|
| Naturalization fee (any route) | $9,500 | Official SRE fee, valid Jan 1 – Dec 31, 2026. Paid at the bank before applying. |
| Federal criminal record certificate | $240 | Official amount on gob.mx. Requested online; answer within 72 hours. |
| State criminal record certificate | Varies | Each state sets its own. Pick your state below. |
| Apostille or legalization of your birth certificate | Varies | Charged by your country or state of birth. |
| Certified translation (perito) | Varies | Priced per page or document. Ask two or three translators for quotes. |
| Copies, photos and travel | Varies | Mexico City or your regional SRE office |
| Certified copy of your letter (later, optional) | $700 | Official SRE fee per copy |
| Fixed by federal authorities | $9,740 | Naturalization fee + federal certificate. Everything else depends on your state, country of birth and translator. |
State criminal record certificate
We only show amounts published on official state portals. Where we couldn't confirm one, we tell you who issues it so you can check directly.
The fee goes to the bank, never to a person. You pay it with the SRE's payment form at a bank branch, before your appointment. If you already paid in an earlier year and haven't started, the SRE asks you to pay the difference to the current fee.
What people who've done it report
Personal accounts published by people who went through the process. They're experiences, not rules — where the SRE says the same thing officially, we note it.
Plan for a full day — or two
An applicant who traveled to Mexico City recommends leaving two business days, because review, exam and biometrics take hours with the volume of people.
The conversation with the officer is in Spanish
Applicants describe a short interview after the exam. How long it lasts seems to depend on how comfortably you follow instructions in Spanish.
The wait after the appointment
One applicant by residence reports three to four months between the appointment and the official answer. Officially, the SRE has up to three months from the moment INM gives its opinion.
Study beyond the bibliography
Applicants report exam versions that rotate and questions they couldn't find in the recommended reading. Use the SRE guide as the base, not the limit.
A new passport hides your history
The SRE itself recommends bringing your previous passport or an INM travel record if your current passport doesn't cover the last two years, so you don't receive follow-up requests later.
There's no "I'll bring it tomorrow"
This one is official: if anything is missing, you can't leave and come back in. You book a new appointment.
What happens to your other citizenship?
The renunciation isn't optional. The Nationality Law (article 19) requires every applicant to renounce their previous nationality and swear allegiance to Mexican law. There's no way to naturalize without it. The SRE only asks for it once it has decided to grant you nationality.
But that renunciation doesn't take away your other citizenship. Mexico can't revoke another country's citizenship — only that country's law decides. The renunciation has effect toward Mexico: inside Mexican territory you are Mexican and are treated only as Mexican.
- United States: the State Department says a US citizen may naturalize in another country without risk to their US citizenship, and losing it requires an intent to give it up.
- Other countries: some do withdraw citizenship from people who voluntarily acquire another. Confirm with your own consulate before your letter is delivered.
Inside Mexico, always as a Mexican. Under article 37 of the Constitution, a naturalized Mexican loses that nationality by using a foreign passport or presenting themselves as a foreigner in an official document, or by living abroad for five continuous years. Enter and leave Mexico on your Mexican passport.
You don't have to risk your appointment on your own
This guide gives you everything to do it yourself, and many people do. But the process doesn't forgive mistakes, and every mistake costs time:
We handle these files in English and in Spanish. Choose how much you want us to take on:
Consultation
One session about your specific case.
- We confirm your route and real eligibility date
- We check your days abroad and any risks
- You leave with your exact document list
File review
You put it together; we check it before your appointment.
- Review of every document, copy and translation
- We check your DNN-3 and travel statement
- We tell you what to fix before the day that counts
Full support
We handle the process from start to finish.
- We build your file and coordinate apostille and translation
- Pre-registration, payment and appointment
- We prepare you for the exam and interview, in Spanish
- Follow-up until your letter, passport and INE
We tell you the cost clearly before we start. We don't promise outcomes that depend on the authorities; we do promise your file arrives complete and done right.
Questions
Can I apply with a temporary resident card?
Yes. Temporary and permanent residence both count toward the time required — except the temporary student card.
Does my resident card have to be valid when I apply?
Yes, and with at least six months left after the date you submit your application.
Can my birth certificate be a notarized copy made in Mexico?
No. The SRE asks for the original from your country, apostilled or legalized, and translated by a court-certified translator (SRE FAQ).
Do I have to go to Mexico City?
No. You can book at the central office or at a regional SRE office when you choose your appointment.
If I naturalize through marriage and later divorce, do I lose it?
No. You keep Mexican nationality after the marriage ends, unless the marriage is annulled for a reason attributable to you (Nationality Law, article 22).
What if I have an open criminal case?
The SRE suspends the application while a criminal process is open against you, in Mexico or abroad, and won't issue the letter while you're serving a prison sentence for an intentional crime (articles 24 and 25). This is a case to review with a lawyer before applying.
Want someone to look at your case?
Tell us your route and the documents you already have. We'll tell you plainly what's missing and which kind of help fits you — or whether you can do the rest on your own.
Sources
- SRE — Naturalization by residence (requirements)
- SRE — Naturalization by marriage to a Mexican
- SRE — 2026 fees and response times
- SRE — How to pre-register and book
- SRE — What happens on appointment day
- SRE — Naturalization FAQ
- gob.mx — Federal criminal record certificate
- Hague Conference — Apostille Convention status table
- US Department of State — Dual nationality
- Nationality Law (Ley de Nacionalidad), articles 19–25
- Mexican Constitution, articles 30 and 37
General information, not legal advice for your specific case. Fees and requirements change; this page was checked against official sources on October 8, 2026.