French naturalisation: the 2026 conditions to become French

Published on June 16, 2026 · 9 min read

Becoming French means obtaining a permanent status: no more residence permit renewals, the right to vote, a French passport and full protection against removal. But in 2026, the rules have changed. The required level of French has been raised, a civic exam is now mandatory, and the slightest mistake in the file can lead to a rejection or a postponement of several months. Here, point by point, are the conditions to meet and the procedure to follow.

1. The two routes to becoming French

There are mainly two ways to acquire French nationality as an adult foreign national:

• Naturalisation by decree: this is the most common route. It is intended for foreign nationals who have resided legally in France for several years. The administration retains discretionary power: it can accept or refuse, even if all the conditions are met.
• Acquisition by declaration: reserved for specific situations, notably marriage to a French spouse (declaration possible after 4 years of marriage, under conditions), or certain children born and raised in France. It is a more framed right, but the administration always checks assimilation and the absence of fraud.

This article focuses on naturalisation by decree, the route that concerns the greatest number of foreign nationals in France.

2. The residence requirement

You must reside in France in a habitual and continuous manner for at least 5 years before filing the application. Your residence must be effective: it is in France that the centre of your material interests (notably professional) and family interests lies.

This 5-year period can be reduced to 2 years in certain cases, for example if you have successfully completed two years of higher education in France to obtain a French diploma. Other special situations (services rendered to France, exceptional path) can also allow an exemption from the residence period.

You must also reside legally in France at the time the naturalisation decree is signed.

3. The level of French: rise to B2 in 2026

This is the most important change. Since 1 January 2026, the required language level has risen from B1 to B2 of the Common European Framework of Reference for Languages (CEFR), both spoken and written. This increase stems from the law of 26 January 2024 and was specified by decree in 2025.

In concrete terms, the B2 level corresponds to autonomous use of the language: understanding complex texts, expressing yourself clearly on various topics, conversing without great effort with a French speaker. It is generally proven by a recognised language diploma or test (TCF, TEF, DELF/DALF, etc.).

4. The mandatory civic exam

Since 1 January 2026, knowledge of French history, culture and society is checked by a mandatory civic exam. It takes the form of a multiple-choice questionnaire (MCQ) in French.

• 40 questions on knowledge and situational scenarios
• A minimum of 32 correct answers (80%) is required to pass
• Passing this exam is now necessary not only for naturalisation, but also for the resident card and certain multi-year cards

This civic exam should not be confused with the civic training of the integration contract, which concerns residence permits: these are two distinct schemes.

5. Assimilation, resources and stability

Beyond language and the exam, the administration assesses your overall integration into the French community:

The assimilation interview is a decisive moment: a file that's solid on paper can be postponed if the interview goes badly. Preparation matters as much as the documents.

6. The documents in the file

The exact list depends on your situation, but a naturalisation file generally includes:

• Completed and signed application form (Cerfa)
• Birth certificate translated and, where applicable, legalised or apostilled
• Residence permits covering the residence period
• Proof of B2 French level and the result of the civic exam
• Proof of resources: tax assessment, payslips, employment contract
• Recent proof of address
• Criminal record extract (France and country of origin depending on the case)

Foreign civil status documents are the leading cause of blockages: non-compliant translations, missing legalisation, name inconsistencies. Better to secure them before filing.

7. Procedure and timelines

The application is filed with the naturalisation platform competent for your département. The process generally follows these steps: file submission, acknowledgement of receipt, assimilation interview, administrative investigation, then decision.

The timelines are long and vary greatly depending on the prefecture: it often takes more than a year between filing and the decision. The outcome can be an acceptance (publication in the Journal officiel by decree), a postponement (deferral with a period to respect) or a rejection. In the event of an unfavourable decision, appeals are possible within strict deadlines.

Frequently asked questions

What level of French is needed for naturalisation in 2026?

Since 1 January 2026, the required level is B2 of the Common European Framework (CEFR), spoken and written. This is higher than the former B1 level.

How many years of residence are needed?

In principle 5 years of habitual and continuous residence. This period can be reduced to 2 years, for example after two years of successfully completed higher education in France.

Can the administration refuse even if I meet the conditions?

Yes. Naturalisation by decree is not an automatic right: the administration retains discretionary power. That is why the quality and consistency of the file are decisive.