Citizenship in France
Naturalisation timelines, tests, and dual nationality
Naturalisation by decree generally requires around five years of habitual residence in France, reduced to roughly two years for applicants who have completed at least two years of higher education leading to a French qualification. Applicants must demonstrate French at a tested level, commonly B1 or higher for both speaking and writing, show assimilation into the community at an interview, and sign the charter of the rights and duties of the French citizen. Dual nationality is permitted.
| Usual residence requirement | Around five years of habitual residence source |
| Reduced period | Around two years for graduates of French higher education |
| Language | Tested French, commonly B1 or above in speaking and writing |
| Interview | Individual interview on assimilation and republican values |
| Charter | Signature of the charter of rights and duties of the French citizen |
| Dual nationality | Permitted under French law |
Two clocks, and the university shortcut
The ordinary route is naturalisation by decree after a period of habitual residence commonly stated as five years. The reduction to roughly two years for those who have successfully completed at least two years of study at a French higher education institution and obtained a French qualification is the most consequential feature of the French system for younger arrivals, and it is why a French master's degree is often worth more than its tuition suggests.
Other reductions exist for applicants who have rendered exceptional services to France or who present an exceptional integration profile, but these are discretionary and rare.
The language and civics conditions
- French is assessed by an approved test or by an accepted French qualification, at a level that has been raised in recent years and that covers written as well as spoken ability.
- The interview at the prefecture explores knowledge of French history, culture, society, and the principles and values of the republic, drawing on the official livret du citoyen.
- Applicants sign the charter of the rights and duties of the French citizen, which forms part of the file rather than being ceremonial.
- Exemptions on grounds of age or medical condition exist but are narrowly framed.
Marriage is a declaration, not a naturalisation
The spouse of a French national does not apply for naturalisation by decree but makes a declaration of nationality, subject to a qualifying period of marriage and of continued community of life, a language condition, and — where the couple has lived abroad — evidence of the French spouse's registration with the consulate. The periods and evidential requirements differ from the decree route and should not be conflated with it.
What the file consists of
Naturalisation files are documentary and unforgiving: full civil status records for the applicant and their parents, often requiring legalised and translated foreign certificates, tax notices for the recent years, proof of residence for each year, employment and resource evidence, and the language certificate. Files are examined and can be adjourned rather than refused, meaning the applicant is invited to reapply after a stated period.
Processing is measured in many months and varies substantially between prefectures.
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Official sources
- Service-Public: naturalisation by decree
- Service-Public: nationality by marriage
- Ministry of the Interior, becoming French
Checked against these pages in September 2026. Fees and processing times change without notice — confirm before you act.