France · Code civil, article 21-17

French nationality requirements

Naturalisation by decree asks for 5 years of habitual, stable residence, and residence is the first of 5 requirements. Below is each one, dated and sourced, with the shorter routes, what French law does and does not say about time abroad and what happens after you file.

General route
5 yrs
of habitual, stable residence
French graduates
2 yrs
after two years of higher education in France
Refugees and francophones
No wait
no minimum residence period
Spouse of a French citizen
4 yrs
of marriage, by declaration
Download Belong France on the App StoreComing very soon to Google Play.

7 days free, then 34,99 € a year.

The rules are one part. See the whole journey on belongfrance.app
Requirements

Everything naturalisation asks for

Habitual, stable residence
Habitual, stable residence with France as the centre of your material interests and family ties, under Code civil articles 21-16 and 21-17. You must hold a valid residence permit when you file, unless you are an EU, EEA or Swiss national, and still reside in France when the decree is signed.
French, level B2
French at level B2 of the Common European Framework, oral and written, under Code civil article 21-24 as raised by the 2024 immigration law. A French national diploma at level 3 or higher, a diploma attesting B2 such as the DELF B2 or DALF or a TCF or TEF attestation issued less than two years ago all count. Applications filed before 2026 remain under the former B1 rule. Check the accepted proofs at service-public.fr.
Civic exam
The examen civique, 40 multiple-choice questions on French history, the principles and institutions of the Republic, citizenship and France's place in Europe and the world, passed at 32 correct in at most 45 minutes. It applies to naturalisation by decree only, declaration routes such as marriage are exempt and the official preparation site publishes the knowledge questions for free. Prepare on the official site.
Stable and sufficient resources
Professional insertion is a central condition: the prefecture weighs whether your income is stable, sufficient and your own, over roughly the last five years, with tax notices and work records as proof. Reliance on social assistance weighs against the file under the ministerial guidance of May 2025.
Good conduct
Good conduct under Code civil article 21-23 and the bars of article 21-27: a sentence of six months' imprisonment or more without suspension, or any conviction for terrorism or acts against the fundamental interests of the Nation, disqualifies unless rehabilitated. You submit criminal record certificates from your countries of prior residence, and tax compliance is checked as part of the civic-conduct enquiry. Read the rules at service-public.fr.
Routes

5 routes, and the years each one asks for

Article 21-17 of the Code civil sets five years as the rule. Article 21-18 cuts it to two after two years of successful higher education in France, and articles 21-19 and 21-20 waive it for recognised refugees and for francophone nationals. The spouse of a French citizen does not naturalise at all: article 21-2 is a declaration, counted in years of marriage rather than years of residence. Fiche F2213 lists a few further cases, among them service in the French army.

Naturalisation by decree
The path under Code civil article 21-17. It asks for five years of habitual, stable residence with France as the centre of your interests, French at B2 oral and written, a pass in the civic exam, stable and sufficient resources and good conduct. You file online through ANEF, pay the 255 euro fee and the prefecture interviews you on your adhesion to the values of the Republic before the file goes to the Ministère de l'Intérieur. The legal deadline to answer is 18 months, 12 if you have lived in France for 10 years, and naturalisation is granted by decree published in the Journal Officiel. France asks no renunciation, you keep your original nationality if your own country allows it.
Graduate two year route
Code civil article 21-18 cuts the residence period to two years for a person who has completed two years of higher education in France and obtained a French university or grande-école diploma, and for a person who has rendered or can render important services to France. Every other condition applies in full: B2 French, the civic exam, resources and good conduct. This tracker cannot verify your studies, so your projected date stays on the five year figure; if this is you, count from two years instead.
Francophone route
Code civil article 21-20 waives the residence duration entirely for a national of a French-speaking country whose native language is French or who attended at least five years of schooling in a French-language institution. You must still actually reside in France when you apply and when the decree is signed, and the other conditions apply in full: B2 French, which this profile usually clears easily, the civic exam, resources and good conduct.
Refugee route
Code civil article 21-19 waives the residence duration for a person with recognised refugee status in France. You must still reside in France when you apply, and the language, civic exam, resources and good conduct conditions apply, with your OFPRA documentation standing in for certificates your country of origin would normally issue. A refugee or stateless person aged 70 or over with 15 years of residence is exempt from the language proof.
Spouse of a French citizen
Under Code civil article 21-2, the spouse of a French citizen can claim nationality by declaration after four years of marriage with a continuous shared life, five years if you cannot show three years of continuous residence in France since the marriage. French at B2 applies, the civic exam does not. The four years run on the marriage, not on your residence, so this tracker does not compute a date for it. Both spouses are interviewed, and the government has a year from your receipt to refuse registration; silence means the declaration is registered and nationality takes effect from the day you filed. The government can still oppose the acquisition by decree in Conseil d'État within two years, for indignity or lack of assimilation.

Two proofs, and they are not the same proof

The examen civique and the B2 are separate things

For applications filed from 1 January 2026, a naturalisation file carries proof of French at B2, oral and written, and an attestation de réussite à l’examen civique. They are exempted separately. Fiche F39426 excuses nobody from the exam but a person whose health makes the assessment impossible, on a medical certificate. Fiche F11926 adds one ground for the B2 alone: refugees and stateless people over 70 with 15 years of lawful residence.

The declaration by marriage asks for the B2 and not the exam. Age, nationality and schooling in France exempt nobody from the exam, though a French diploma usually is the B2 proof.

Both lists are set out in full on the exemptions page in the examen civique guides.
Time abroad

How days outside France count, and the number nobody has set

French law sets no fixed day count. Residence is judged on where your home, work, family and tax life are, and prefectures take issue with stays abroad around three months or longer. Verify with a lawyer or your prefecture before a long stay abroad.

The app flags risk rather than producing a verdict, because a verdict would mean inventing a threshold French law has not set. Where the judgement belongs to the prefecture, the app says so instead.

After you file

Filing on ANEF, and the 18 month deadline

The administration must answer within 18 months of the receipt for a complete file, 12 months if you have lived habitually in France for at least ten years, extendable once by three months with reasons. If the deadline passes without an answer, the application counts as refused by silence, which opens an appeal to the Ministry within two months, then the administrative court in Nantes, rather than ending the process.

In practice many files take 18 to 30 months, and the prefecture can call you to an interview and ask for updated documents during the wait. Meeting every requirement does not set the decision date, the prefecture's own queue does. Follow the file on ANEF, where each step is stamped.

The decree is published in the Journal officiel and you are told by email. Nationality takes effect on the day the decree is signed, and the prefecture invites you to a citizenship ceremony within six months, where your extract of the decree is handed to you.

ANEF, suivre ma demande

The deadline is article 21-25-1 of the Code civil. It runs from the récépissé for a complete file, not from the day you press submit.

What to watch

Four things that decide how this actually goes

Decisions run past the legal deadline
The administration must answer within 18 months of your receipt, 12 if you have habitually resided in France for ten years, extendable once by three months with reasons. In practice many prefectures run well past these lines and total times of 18 to 30 months are common. Meeting every requirement does not set the decision date, the prefecture's own queue does.
The 2026 rules raised the bar
The 2024 immigration law took effect for naturalisation on 1 January 2026: the language requirement rose from B1 to B2, oral and written, and the civic exam replaced the interview-only assimilation check for filings from that date. The fee rose from 55 to 255 euros on 1 May 2026. Files submitted before 2026 remain under the former rules on filing date, but if yours is pending and incomplete, verify with your prefecture which regime it is examined under.
Residence is judged on your centre of interests
French law sets no statutory number of days abroad. Residence must be habitual and stable, with France as the centre of your material interests and family ties, and a spouse or children living abroad can be a ground for refusal. No ministerial instruction fixes a threshold either: the three month line here is a prudence marker set by Belong France, matched to the absence length practitioners report prefectures questioning, so keep your tax residence in France, keep proof of your ties and document longer trips.
Dual nationality is allowed
France fully accepts multiple nationality: acquiring French nationality requires no renunciation of your previous one, and French citizens may hold other nationalities without losing French nationality. Whether you keep your original nationality depends only on your own country's law, so check that side before you apply.

Work out your own date, not the general one.

Belong France takes your residence date and every trip you have taken and gives you the distance that is actually yours: what you control, what you do not and what each absence puts at risk.

No invented finish dates. Naturalisation is granted by decree, and where the decision belongs to the prefecture and the ministry rather than to you, the app says so instead of producing a date.

Download Belong France on the App StoreComing very soon to Google Play.

7 days free, then 34,99 € a year.

Common questions

Naturalisation, point by point

How many years of residence does French naturalisation need?

Five as the general rule, under article 21-17 of the Code civil. Two after two years of successful higher education in France with a French diploma, under article 21-18. No minimum at all for recognised refugees, under article 21-19, or for nationals of French-speaking countries who are native French speakers or were schooled five years in French, under article 21-20. The spouse of a French citizen takes a different road: a declaration after four years of marriage.

How many days can I spend outside France?

French law sets no figure. Residence must be habitual and stable, with France as the centre of your material interests and family ties, and the prefecture judges that as a whole. Belong France flags a single stay abroad of around three months or more, because practitioners report prefectures questioning stays that long, and it says plainly that this line is its own and not the law's.

Do I have to give up my current nationality?

No. France asks no renunciation. Whether you keep your original nationality depends only on your own country's law, so check that side before you apply.

How long does the decision take, and what happens if the deadline passes?

Article 21-25-1 of the Code civil gives the administration 18 months from the receipt of a complete file, 12 if you have lived habitually in France for at least ten years, extendable once by three months with reasons. If the deadline passes without an answer, the application counts as refused by silence. That opens an appeal to the ministry within two months and then to the administrative court in Nantes. In practice many files take 18 to 30 months.

What does it cost to apply?

A timbre fiscal of 255 euro, 127.50 euro in Guyane, according to service-public.gouv.fr. The fee rose from 55 euro on 1 May 2026. The examen civique and the language test are paid for separately, to the centres that run them.

Is the examen civique the same thing as the B2?

No. For applications filed from 1 January 2026, a naturalisation file carries two separate documents: proof of French at B2, oral and written, and the attestation de réussite à l'examen civique. The declaration by marriage asks for the first and not the second.

Preparing for the examen civique

The naturalisation exam on French history, the Republic's principles, citizenship and France's place in the world, sat at approved centres. The official preparation site and its question bank are free.

The examen civique is sat on demand at an approved centre, CCI Paris Île-de-France or France Éducation International, through the year and as many times as needed. The attestation does not expire. There is no national calendar.

Practice test and sample questions

Open the official preparation site

Cette page en français

Rules as of 1 October 2026, snapshot 2026.1, from the Ministère de l'Intérieur. Read the official source. Belong France is not a government service, is not affiliated with the Ministère de l’Intérieur and gives no legal advice.