Citizenship in United States
Naturalisation timelines, tests, and dual nationality
Naturalisation is generally available after roughly five years as a lawful permanent resident, or roughly three years where the applicant has been married to and living with a US citizen throughout. The process requires continuous residence, physical presence, English ability, a civics test, good moral character, and an oath of allegiance.
| Standard residence requirement | Around 5 years as a permanent resident source |
| Spouse of a US citizen | Around 3 years, with the marriage subsisting throughout source |
| Physical presence | Broadly, presence for at least half the qualifying period |
| Application form | Form N-400, Application for Naturalization source |
| Tests | English reading, writing and speaking, plus a civics test source |
Continuous residence and physical presence
Two separate requirements are frequently confused. Continuous residence concerns unbroken residence in the United States: an absence of more than six months can raise a presumption that it was broken, and an absence of a year or more generally breaks it outright, resetting the clock. Physical presence is arithmetic — broadly, days actually spent in the country must amount to at least half the qualifying period.
Applicants also generally must have lived for around three months in the state or district where they file, and must maintain permanent resident status throughout.
The tests
The English requirement covers reading, writing, and speaking, assessed at the interview. Exemptions exist for older applicants with long residence, on published age-and-residence combinations, and accommodations exist for certain medical conditions.
The civics test is drawn from a published question bank covering American government, history, and geography, and the officer asks a subset of it orally. USCIS publishes the questions and free study materials; the format and question bank have been revised more than once, so the current official materials rather than older third-party sets are the ones to use.
Good moral character
The applicant must show good moral character over the statutory period, which is a defined legal standard rather than a general impression. Failure to file tax returns, unpaid child support, certain criminal matters, and false statements on earlier immigration applications are all commonly relevant, and some issues are permanent bars.
Because the naturalisation interview involves a review of the entire immigration history, inconsistencies from years earlier surface at this stage. This is a recognised reason to have longstanding irregularities examined by a licensed attorney or an accredited representative before filing.
What citizenship changes
- The right to vote in federal elections and to hold most public offices.
- A US passport and freedom from any residence obligation or risk of removal for immigration reasons.
- The ability to petition for a wider set of relatives, including parents and siblings, and to place a spouse in the uncapped immediate relative category.
- The United States generally permits dual nationality, though the applicant's other country may not; that question is decided by the other country's law.
- US citizens and permanent residents are generally taxed on worldwide income regardless of where they live, which is an unusual feature with long-term consequences.
Free: the United States visa checklist
A one-page PDF listing every document each route asks for, so you can see what you are missing before you spend anything. No spam, unsubscribe in one click.
The list is not open yet, so nothing was sent and your address was not stored. The guides on this site are free and need no sign-up.
We email a short course on how the United States routes work, then the report offer. Your address is never sold.
Official sources
- USCIS — Citizenship and naturalisation
- USCIS Policy Manual, Volume 12: Citizenship and Naturalization
Checked against these pages in September 2026. Fees and processing times change without notice — confirm before you act.