U.S. Citizenship & Naturalization Guide

At least 18 years old

The applicant must be at least 18 years old to file N-400 in their own name.

Permanent residents under 18 may automatically acquire U.S. citizenship when their parent naturalizes (derivative citizenship), but this is outside the scope of this guide.

Reside in USCIS jurisdiction for at least 3 months

Before filing, you must have lived for at least 3 months in the USCIS jurisdiction where you intend to file.

"Reside" here doesn't mean you can't leave the U.S. before filing— rather, you must maintain a permanent dwelling place. Short business trips or vacations are fine as long as the permanent residence doesn't change. However, if you've recently moved, you must wait 3 months at the new residence before filing.

Held a green card for the required period (5 or 3 years)

The applicant must have held a green card for a sufficient period:

• General rule: 5 years
• U.S. citizen spouse: 3 years—you must have been continuously married to, and living with, a U.S. citizen for at least 3 years of permanent resident status

Eligible applicants may file N-400 within 90 days before the 5-year (or 3-year) anniversary.

Continuous residence: no single trip over 6 months

During the past 5 years (or 3 years), no single trip outside the U.S. should exceed 6 months.

• Trips of 6 months to 1 year: USCIS will require additional evidence that you've maintained "continuous residence"
• Trips longer than 1 year: typically considered to break continuous residence; the clock resets

After a break in residence — when can you re-apply?

An absence of 1 year or more (365+ continuous days) during the statutory period automatically breaks the continuity of residence, whether the absence occurs before or after the naturalization application is filed.

The only exception is an approved Form N-470 (Application to Preserve Residence for Naturalization Purposes)— available to LPRs employed abroad by the U.S. government, qualifying U.S. private companies, or a religious organization.

After a break in residence, you must meet the following minimum waiting period after returning to the U.S. before you can re-apply:

• 👉 Spouse of a U.S. citizen: must reside continuously in the U.S. for at least 2 years and 6 months after returning before filing N-400
• 👉 All other applicants: must reside continuously in the U.S. for at least 4 years and 6 months after returning before filing N-400
• 👉 If you can demonstrate no intent to disrupt continuous residence, USCIS may allow filing as early as 2 years and 1 month (spouse of U.S. citizen) or 4 years and 1 month (all others) after returning

Even if individual trips are under 6 months, if you've been frequently entering for short stays while living mostly abroad, USCIS may still ask for evidence that you never abandoned your green card, such as:

• Past U.S. bank statements
• Insurance policies
• U.S. tax returns
• Proof of permanent U.S. residential address

⚠️ If you've frequently entered the U.S. for short stays during the qualifying period while living mostly abroad, consult an attorney before filing to assess whether now is the right time to apply.

Physical presence: at least 30 months (or 18 months)

Within the past 5 years, you must have been physically present in the U.S. for at least 30 months (913 days) in total.

If you're applying through a U.S. citizen spouse, you need at least 18 months (548 days) within the past 3 years.

Physical presence is the sum of all "in-country" days between entries and exits. Before filing, compile your travel history for the past 5 years (or 3 years).

No criminal record or immigration violations

The applicant must have no criminal convictions or immigration violations.

Common issues that may affect a citizenship application include:

• Drug offenses
• Domestic violence, sex offenses
• Multiple DUIs
• Fraud or document falsification
• Failure to file or pay U.S. taxes
• Failure to register for Selective Service (males 18–25)
• Failure to update address (AR-11)
• Extended absences from the U.S.

⚠️ If any of these apply, strongly consult an immigration attorney before filing. In some cases, filing N-400 can actually trigger removal proceedings.

English and civics tests

At your interview, the officer will test your English ability and U.S. civics knowledge. Here's how each part works:

① English test (reading, writing, speaking)

• Reading: the officer presents 3 English sentences—you need only correctly read 1 of them to pass
• Writing: the officer dictates 3 English sentences—you need only correctly write 1 of them to pass
• Speaking: throughout the interview conversation, the officer assesses whether you can understand and respond to questions

② Civics test (2025 version, effective 2025/10/20)

• Question pool: 128 total
• The officer randomly asks 20 questions, oral short-answer (not multiple choice)
• You must correctly answer at least 12 to pass
• The officer doesn't need to ask all 20—once you've correctly answered 12 (pass) or missed 9 (fail), the test ends early

③ Special rule for elderly long-term residents (65+ / 20 years)

Applicants who are 65 or older with at least 20 years of permanent residence qualify for a simplified test:

• Special 20-question pool
• Asked 10 questions; need to answer 6 correctly to pass

④ English test waiver (elderly long-term residents)

You may request a waiver of the English test if you meet either:

• Age 50+ with at least 20 years of permanent residence, or
• Age 55+ with at least 15 years of permanent residence

You still must pass the civics test—but USCIS allows you to use an interpreter and answer in your native language.

⚠️ Applications filed before 2025/10/20 still use the older 2008 100-question test. The officer asks 10 questions and you need 6 correct to pass.