Introduction

Becoming French by decree is far from a routine affair. It is an administrative journey lasting 12 to 30 months, accompanied by a thick dossier (often over 50 documents), an assimilation interview at the prefecture, and the anxious wait before signing the naturalization decree in the government gazette. However, for many foreigners who have long lived in France, this marks the fulfilling conclusion of a life project and is the key to dual nationality, free movement within the EU, voting rights, and automatic acquisition of French nationality for future children.

This guide details the actual process of naturalization by decree as implemented by the Ministry of the Interior and various prefectures in 2026. Whether you are Chinese, Moroccan, Algerian, Senegalese, Vietnamese, Brazilian, or Portuguese, the framework is the same, though the details may vary slightly by consulate. There is also a faster legal route — naturalization by marriage — and this article will highlight the key differences to help you choose the right path.

Substantive Conditions: What Do Administrative Authorities Actually Review?

In France, naturalization is a privilege rather than a right. Even with a complete dossier, administrative authorities can delay or deny your application if they believe you do not meet the substantive criteria. There are six main conditions:

• 5 years of legal residence: You must have legally resided in France for at least 5 years at the time of application. Graduates of French higher education with a master's degree or higher can shorten this to 2 years; those who have made special contributions to France or certain veterans may reduce it to 0 years.
• Stable residence: Your material and family life must be centered in France. If your spouse and children still live abroad, your application is almost certain to be delayed.
• Professional integration and stable income: CDI (permanent contract), public service, stable self-employment, or pension. Applicants relying solely on RSA (minimum income support) are rarely approved. Authorities generally review tax returns for the last three years.
• No criminal record or acceptable: A prison sentence of more than 6 months directly constitutes a legal barrier to application; lighter penalties are assessed on a case-by-case basis.
• Integration into French society: Knowledge of history, culture, and the republican system, as well as acceptance of republican values (separation of church and state, gender equality, personal freedom).
• B1 level in French (speaking, reading, writing) (mandatory since 2020), proven by DELF B1, TCF, or a French diploma above the brevet (middle school diploma).

Three typical examples. Wei is a Chinese engineer who has worked in Lyon for seven years, has a stable salary, DELF B2, and two children born in France: his application is solid. Karim has been a delivery driver in Bordeaux for five years, currently on a CDI, but has a history of receiving RSA for 18 months: his application is at risk and requires recent pay slips and a strong motivation letter to improve his chances. Maria is Brazilian and has been married to her French husband in Marseille for three years: she can directly pursue naturalization by marriage (which requires a marriage of at least 4 years), which is faster than going through the decree process.

Difference with "Marriage Naturalization"

Many people confuse these two paths. The differences are significant:

• Decree (décret): 5 years of residence, income, assimilation, administrative discretion, 12 to 30 months. No marriage required.
• Marriage Declaration (déclaration): Must be married to a French citizen for at least 4 years (if not living in France for 3 years after marriage, then 5 years), uninterrupted cohabitation, B1 level in speaking, reading, and writing, no income review. This is a declaration procedure under Article 21-2 of the Civil Code, not a decree. The actual waiting time is also long (12 to 24 months), although the process is simpler on paper. Even after registration, the prosecutor can still raise objections within a year.

In practice: those who have been married longer tend to have a more stable path through marriage (no income review); singles or newlyweds can only go through the decree.

Dossier: Over 50 Documents to Gather

The most arduous step. The Cerfa 12753 form lists the required materials; allow 2 to 4 months to gather everything. Main categories include:

• Civil status: Multilingual birth certificate (CIEC) or sworn translation + Hague certification or consular certification; marriage certificate, children's birth certificates, divorce decree, family record book.
• Identity and residence: Valid passport, complete copies of all residence permits from the past ten years, recent proof of address.
• Income and taxes: Tax returns for the last three years, recent 12 months of pay slips, employment contract, employer's certificate, or balance sheet for self-employed individuals (Kbis summary, URSSAF declaration).
• Housing and traces of life in France: Utility bills (electricity, gas, internet, phone) for over 12 months; rent receipts or property purchase contracts.
• Criminal record: French criminal record certificate + criminal record certificates from your country of origin and all countries where you have lived for more than 6 months in the past 10 years, translated and certified.
• Language assimilation: Starting from DELF B1, TCF (B1+ score), DALF, or equivalent French diploma.
• Recent passport photos, €55 tax stamp (2026 standard).
• Motivation letter: 1 to 2 pages explaining your connection to France, life plans, and acceptance of republican values.

Wei took three months to obtain his birth certificate notarized in Beijing. Karim submitted his Moroccan "12s" birth certificate and criminal record from Casablanca to a sworn translator in Bordeaux, costing €180. Senegalese Aminata completed her dossier only after two rounds of supplementary documents at the prefecture.

Submission: Online Platform or Paper

Since 2023, most prefectures have switched to the national unified platform NATALI (Online Naturalization). You create an account on the Ministry of the Interior's portal, upload PDF documents, pay the tax stamp, and provide an electronic signature. A few prefectures still allow paper submissions by appointment.

After receiving your application, the prefecture will send a receipt. You typically need to wait 3 to 6 months to receive an interview notification.

Prefectural Assimilation Interview

This is the most nerve-wracking part for applicants. A prefectural official (sometimes a police officer or clerk) will interview you for 30 to 60 minutes, with three objectives: to verify your French language proficiency, your understanding of France, and the sincerity of your naturalization project.

Common questions in 2026:

• Why do you want to become French? Why now?
• What are the three powers of the Republic? Who are the current president and prime minister?
• Name three historical figures of France. What happened in 1789 and 1944?
• Is France a secular state? What does this mean in daily life?
• Gender equality: can you give specific examples?
• What is your profession, income, and housing situation?
• Do you plan to retain your original nationality? (France allows dual nationality, but not all countries do — for example, China, India, Japan, Singapore may require you to renounce your original nationality.)
• Are your children in France? Are your parents, siblings in France or back home?

The official may assess your spoken French on the spot (describing a picture, reading a short text). The Citizen's Handbook (livret du citoyen) published by the Ministry of the Interior is the main reference for review, available for free download on service-public.fr.

After the interview, a summary will be written. You will read and sign it (you can request modifications).

Timing and Results: Approval, Delay, Rejection

The prefecture will forward your dossier to the Ministry of the Interior (Department of French Nationality Acquisition) for a decision. There are three possible outcomes:

• Approval: Your name will appear in the collective naturalization decree published in the government gazette. You will take an oath at a naturalization ceremony held at the prefecture or town hall, receive a French birth certificate, and can apply for a French identity card.
• Delay (ajournement): The decision is postponed for 1 to 3 years to allow you to strengthen a certain condition (income, assimilation, duration of residence). After the delay, you can resubmit your application.
• Rejection (rejet): A decision with reasons attached. You can file an administrative appeal with the Ministry of the Interior within two months; if still unsatisfied, you can sue at the Nantes Administrative Court (the only court with jurisdiction for such cases in France).

Actual waiting times in 2026: Prefectures in smaller towns with smoother processing average 12 months; in Paris, Bobigny, Créteil, Marseille, etc., it can take 20 to 30 months. Centralized processing in Nantes and digitization have narrowed the gap, but backlogs in the Paris region remain a real issue.

Key Summary

• 5 years of legal residence (2 years for master's degree holders), life center in France, stable income
• B1 level in speaking, reading, writing, proven by DELF, TCF, or French diploma
• Over 50 documents: translated and certified civil status, 3 years of tax returns, criminal record from country of origin, motivation letter, €55 tax stamp
• Assimilation interview lasting 30 to 60 minutes, conducted by the prefecture, assessing system, values, and naturalization project
• Processing period of 12 to 30 months, varying by prefecture, with the decree published in the government gazette
• Marriage route is faster (marriage of at least 4 years), prioritized if conditions are met

About Pionra

Communities from China, Morocco, Algeria, Portugal, Vietnam, Senegal, and Brazil on Pionra share real experiences regarding processing times, interview questions, and foreign nationality lawyers. Visit /fr/communautes to ask questions and engage.

Frequently Asked Questions

My tax return shows low income; can I still apply for nationality?

Yes, as long as it is above the poverty line and you can support yourself. Full-time SMIC + CDI can pass smoothly; relying solely on RSA will not work. AAH (disability allowance), pensions, and disability compensation can supplement. Authorities place more emphasis on stability rather than the amount: three years of stability outweighs one year of peaks.

I haven't taken DELF B1, but I am fluent in everyday French; is that acceptable?

No. Since 2020, formal proof is required. French diplomas (CAP, brevet, bac, licence) are equivalent to B1. Otherwise, you need to take the DELF B1 (about €145) or TCF tout public (about €100) at a certification center. Generally, it takes 1 to 3 months from registration to the exam.

Can I retain my original nationality?

France allows dual nationality, but your country of origin may not (China, India, Japan, Singapore, some Gulf countries) and may require you to renounce your original nationality. Confirm in advance: France does not enforce this, but your original passport may be canceled in your home country.

My application was delayed due to "insufficient professional integration"; what should I do?

Use the delay period to strengthen your dossier: accumulate another 12 to 24 months of pay slips (preferably CDI), and resubmit after the delay. An employer's letter confirming job stability carries significant weight.

How much does it cost to hire a lawyer for assistance?

The dossier tax stamp alone is €55. A foreign nationality lawyer's assistance + accompanying to the interview generally costs €800 to €2,000. If there is a criminal record, complex immigration paths (asylum, legalization), or if you need to appeal a delay, hiring a lawyer is worthwhile.