Assimilation Policy Requirements for U.S. Citizenship

To qualify for U.S. citizenship through naturalization, you must be a lawful permanent resident who has met continuous residence and physical presence minimums, can read, write, and speak basic English, can pass a civics test on American history and government, has shown good moral character, and is willing to take the Oath of Allegiance. The U.S. citizenship requirements below are set by federal statute and applied by USCIS at the interview.

Residency and Physical Presence

You cannot file Form N-400 until you have been a lawful permanent resident for at least five years. Spouses of U.S. citizens qualify after three years.¹

The residence clock has two parts, and they are counted separately. Continuous residence means you have kept the United States as your home without extended breaks. Physical presence is a raw day count: at least 30 months inside the country during the five-year window, or 18 months during the three-year window for qualifying spouses.² You can keep a U.S. home and still fall short on days.

How Trips Abroad Affect the Clock

A single trip outside the country lasting more than six months but under a year creates a legal presumption that your continuous residence was broken.³ The burden is on you to rebut it. Evidence that helps: you kept your U.S. job, your immediate family stayed here, you maintained a home or lease.

If USCIS concludes residence was broken, the five-year clock resets and you have to rebuild an unbroken period before applying again. A trip of a full year or more breaks continuous residence automatically, with no room to argue.

English and Civics Tests

Federal law requires every applicant to show they can read, write, and speak English at an everyday conversational level.⁴ The bar is practical literacy, not academic fluency. During the interview, a USCIS officer tests reading and writing by having you read a sentence aloud and write one down. Speaking is judged from the conversation itself.

The civics portion is oral. Under the 2025 redesigned test, the officer asks up to 20 questions drawn from a published pool of 128 on American history and government. You need 12 correct to pass; the officer stops as soon as you reach 12 right or 9 wrong.⁵ USCIS publishes the full 128 questions and answers as study material.⁶

Fail either the English or civics component and you get one more chance. USCIS reschedules the retest 60 to 90 days later. A second failure means denial, though you can start over with a new application.

Exemptions for Older Applicants and People With Disabilities

Two age-based exceptions remove the English requirement. If you are over 50 with at least 20 years as a permanent resident, or over 55 with at least 15 years, you skip the English test.⁴ These are usually called the 50/20 and 55/15 exceptions. You still take the civics test, but you can take it in your native language and bring your own interpreter.⁷

A separate waiver exists for applicants whose physical or developmental disability or mental impairment prevents them from learning the material. A licensed physician, osteopathic doctor, or clinical psychologist must complete Form N-648 certifying that the condition is medically diagnosable, has lasted or will last at least 12 months, is not caused by illegal drug use, and explains exactly how it interferes with meeting the requirement.⁸ The form has to be completed no more than 180 days before filing. Advanced age alone, or an inability to read without a diagnosis, does not qualify.

Good Moral Character

You must show good moral character across the entire statutory residence period and up to the moment you take the oath.² Federal law lists specific conditional bars: being a habitual drunkard, deriving income principally from illegal gambling, giving false testimony to obtain immigration benefits, or spending 180 days or more in jail during the statutory period.⁹

An aggravated felony conviction on or after November 29, 1990 is a permanent bar with no exception. The category is broad and includes murder, drug trafficking, firearms trafficking, money laundering over $10,000, fraud or tax evasion over $10,000, and crimes of violence carrying at least a one-year prison sentence.¹⁰

Lesser criminal issues do not disqualify you automatically, but a pattern can. Character review also reaches non-criminal conduct: failing to pay child support, filing fraudulent tax returns, or failing to register for Selective Service when required. USCIS runs FBI background checks and looks at the full statutory period.

Selective Service Registration

Male immigrants living in the United States between the ages of 18 and 25 must register with the Selective Service System.¹¹ If you missed that window, it can hurt your naturalization case, because USCIS looks at whether the failure was knowing and willful when weighing moral character. Men between 26 and 31 who never registered should obtain a Status Information Letter from Selective Service explaining their situation before filing.¹²

Address Reporting While You Wait

Every non-citizen in the United States must report a change of address to USCIS within 10 days of moving, using Form AR-11.¹³ The rule applies to green card holders and most other non-citizens, with narrow exceptions for certain diplomatic and visa-waiver visitors.

Skipping it is a misdemeanor carrying up to a $200 fine, up to 30 days in jail, or both. The bigger risk is that a violation can be grounds for detention and removal on its own, whether or not a criminal case is brought.¹⁴

Fees and Fee Relief

Filing Form N-400 costs $710 for most applicants, covering the application and biometrics. Applicants 75 and older do not pay the biometrics portion. Fees are adjusted periodically for inflation.

Two forms of financial relief exist. A full fee waiver on Form I-912 is available if your household income is at or below 150% of the federal poverty guidelines: $23,940 for a single-person household in the contiguous 48 states.¹⁵ A reduced fee is available up to 400% of the guidelines, which for a single-person household is $63,840. Thresholds are higher in Alaska and Hawaii. Current military members may qualify for separate waivers.

The Oath of Allegiance

Naturalization ends with the Oath of Allegiance, taken at a public ceremony. The oath asks you to renounce allegiance to any foreign government, support and defend the U.S. Constitution, and, if required by law, bear arms, perform noncombatant military service, or do civilian work of national importance.¹⁶ If you hold a foreign title of nobility, you renounce that too.¹⁷

Conscientious objectors can take a modified oath. Clear and convincing evidence that religious belief bars you from bearing arms substitutes noncombatant or civilian service. If your beliefs bar any military service at all, the oath drops both military clauses and keeps only the civilian service commitment.¹⁶

Once you take the oath, you can vote in federal, state, and local elections, hold federal jobs that require citizenship, and are protected from deportation except in narrow cases of fraud or voluntary renunciation.

If You Are Denied

A denial arrives as a written notice explaining which requirements were not met, and USCIS must issue it within 120 days of the interview.¹⁸

You have 30 days from receiving the denial, or 33 if it was mailed, to file Form N-336 for a hearing before a different immigration officer.¹⁹ Missing the deadline usually means the request is rejected without a fee refund. At the hearing you can submit new evidence to address whatever caused the denial.

If the hearing also denies you, or if you skip it, you can file a fresh N-400 and start again. A denial creates no permanent bar, but it stays in your file, and USCIS will look at it when you reapply.

1
U.S. Citizenship and Immigration Services. Continuous Residence and Physical Presence Requirements for Naturalization
2
Office of the Law Revision Counsel. 8 USC 1427 – Requirements for Naturalization
3
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part D Chapter 3 – Continuous Residence
4
Office of the Law Revision Counsel. 8 USC 1423 – Requirements as to Understanding the English Language, History, Principles and Form of Government of the United States
5
U.S. Citizenship and Immigration Services. 2025 Civics Test
6
U.S. Citizenship and Immigration Services. Study for the Test
7
U.S. Citizenship and Immigration Services. Exceptions and Accommodations
8
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part E Chapter 3 – Medical Certification for Disability Exceptions
9
Office of the Law Revision Counsel. 8 USC 1101 – Definitions
10
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part F Chapter 4 – Permanent Bars to Good Moral Character
11
Selective Service System. Selective Service System
12
Selective Service System. Frequently Asked Questions
13
U.S. Citizenship and Immigration Services. How to Change Your Address
14
Office of the Law Revision Counsel. 8 USC 1306 – Penalties
15
U.S. Citizenship and Immigration Services. Poverty Guidelines
16
Office of the Law Revision Counsel. 8 US Code 1448 – Oath of Renunciation and Allegiance
17
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part J Chapter 2 – Oath of Allegiance
18
U.S. Citizenship and Immigration Services. USCIS Policy Manual Volume 12 Part B Chapter 4 – Results of the Naturalization Examination
19
U.S. Citizenship and Immigration Services. Request for a Hearing on a Decision in Naturalization Proceedings