Form N-400, Application for Naturalization, is the application you file with USCIS to become a U.S. citizen. For the millions of permanent residents (green card holders) eligible to naturalize, the N-400 is the gateway to U.S. citizenship — and with it, the right to vote, obtain a U.S. passport, petition for a wider range of family members, and live free from the threat of deportation. This comprehensive guide covers everything you need to know about the N-400: eligibility requirements, the application process, the naturalization interview and civics test, fees, processing times, and what happens after approval.
Last updated: July 23, 2026.
- 1. Who Can Apply for U.S. Citizenship Through Naturalization?
- 2. N-400 Filing Fee
- 3. The N-400 Application Process: Step by Step
- 4. N-400 Processing Times
- 5. Benefits of U.S. Citizenship
- Frequently Asked Questions About Form N-400 and Naturalization
- Related Immigration Process Guides
- 6. The N-400 Civics Test: What You Need to Know
- 7. N-400 Interview: Common Questions and What to Expect
- 8. Special Naturalization Paths — Not Everyone Waits 5 Years
- 9. What Happens After the Interview — The Oath Ceremony
1. Who Can Apply for U.S. Citizenship Through Naturalization?
The Standard 5-Year Rule
Most green card holders can apply for naturalization after 5 years of continuous lawful permanent residence. You can file your N-400 up to 90 days before your 5-year anniversary as a permanent resident. The 5-year clock begins from the date you were admitted as a lawful permanent resident — the date shown on your green card.
N-400 eligibility requirements 2026: 5-year rule, 3-year rule for spouses of US citizens, military exception
N-400 eligibility checklist — all conditions must be met before filing.
To qualify under the 5-year rule, you must also: (1) have been physically present in the United States for at least 30 months (half of the 5 years) during the 5-year period; (2) not have any single absence from the U.S. of 6 months or more (which would break continuous residence); (3) have resided in the state or USCIS district where you file for at least 3 months; (4) demonstrate good moral character for the past 5 years; (5) be able to read, write, and speak basic English; and (6) pass a civics test about U.S. history and government.
The 3-Year Rule: Spouses of U.S. Citizens
If you have been married to and living with a U.S. citizen for the past 3 years, and you obtained your green card through that marriage, you can apply for naturalization after just 3 years of permanent residence (not 5). The physical presence requirement is 18 months (half of 3 years) rather than 30 months. You can file 90 days before your 3-year anniversary as a permanent resident.
Military Exceptions
Members and veterans of the U.S. armed forces have special naturalization pathways. Those who served honorably for at least 1 year during peacetime can apply without meeting the standard 5-year residency requirement. Those who served during certain periods of hostilities (designated by presidential proclamation) can apply immediately, even without any prior green card, under INA §329.
2. N-400 Filing Fee
As of the 2024 fee schedule, the N-400 filing fee is $760 for paper filing or $710 if you file online through myUSCIS. This fee includes the biometrics appointment — the $85 biometrics fee that was previously charged separately is now folded into the base fee. Online filers using myUSCIS may pay by credit card, debit card, or bank account transfer. Paper filers pay by check or money order payable to the U.S. Department of Homeland Security.
⚠️ Proposed fee increase (June 2026): On June 23, 2026, DHS published a proposed rule that would raise the N-400 fee to $1,330 (paper) / $1,280 (online) — a 75-80% increase — and eliminate the current $380 reduced-fee option and fee waiver eligibility for N-400 and N-336. This is a proposed rule, not yet final; public comments were open for 60 days after publication. Confirm the fee actually in effect at uscis.gov/n-400 before filing.
A fee waiver (Form I-912) is available for eligible low-income applicants — those with household income at or below 150% of the federal poverty guidelines may qualify. Military applicants filing under INA §328 or §329 are exempt from the filing fee entirely.
3. The N-400 Application Process: Step by Step
Step 1: Determine Your Eligibility
Before filing, confirm that you meet all eligibility requirements: the 5-year (or 3-year) residence requirement, physical presence requirement, continuous residence requirement, English language requirement, civics knowledge requirement, good moral character requirement, and attachment to constitutional principles. Review your travel history carefully — extended absences can disrupt continuous residence and physical presence calculations.
N-400 naturalization process and timeline 2026: 5 steps from filing to oath ceremony
N-400 process from filing to oath — total time typically 8–24 months in 2026.
Step 2: Complete and File Form N-400
Complete Form N-400 through myUSCIS online (recommended) or download the paper form
from the USCIS website. The N-400 asks detailed questions about your personal history, travels, employment, tax compliance, criminal history, and affiliations. Answer all questions completely and honestly — providing false information on the N-400 is a federal crime and can result in denial, denaturalization, and deportation even after citizenship is granted.
Gather and submit supporting documents with your N-400: copy of your current green card (front and back), passport photos, evidence of any name changes, and any other documents required based on your specific situation (divorce decrees, court records, etc.).
Step 3: Biometrics Appointment
After filing, USCIS will schedule you for a biometrics appointment at an Application Support Center (ASC). At this appointment, USCIS takes your fingerprints, photograph, and signature for use in background checks. Attend this appointment — failure to appear without rescheduling can result in denial.
Step 4: Naturalization Interview
USCIS will schedule a naturalization interview at a local USCIS Field Office. At the interview, a USCIS officer will review your N-400 application with you, verify your identity, ask about any changes to your application, administer the English reading and writing test, and administer the civics test. Bring your original green card, valid foreign passport, any requested documents, and all supporting materials to the interview.
Step 5: The Civics Test
The USCIS civics test consists of 10 questions selected from a pool of 100 civics questions about U.S. history and government. You must answer at least 6 out of 10 correctly to pass. USCIS publishes the full list of 100 possible civics questions and answers on its website — study all 100 before your interview. The test is administered orally in English by the USCIS officer. If you fail the civics test or English test at your first interview, USCIS will give you a second opportunity at a follow-up interview 60 to 90 days later.
Special accommodations are available: applicants who are 65 or older and have been permanent residents for at least 20 years may take the civics test in their native language (the “65/20 exception”), and only need to answer 6 of 10 questions from a special shorter list. Applicants with qualifying medical disabilities may apply for disability exceptions to the English and/or civics requirements using Form N-648 (Medical Certification for Disability Exceptions).
Step 6: Oath of Allegiance Ceremony
If your application is approved at the interview (or after any additional review), USCIS will schedule you for an Oath of Allegiance ceremony. At this ceremony, you take the Oath of Allegiance to the United States, receive your Certificate of Naturalization, and officially become a U.S. citizen. Ceremonies are conducted at USCIS field offices, federal courthouses, and sometimes at special group events. After the ceremony, you should immediately apply for a U.S. passport — as a new citizen, you are entitled to a full U.S. passport valid for 10 years.
4. N-400 Processing Times
As of 2025, N-400 processing times range from approximately 8 to 24 months from filing to the oath ceremony, depending on the USCIS field office, current workload, and your individual case. USCIS publishes current N-400 processing times by field office at egov.uscis.gov/processing-times. Some field offices process applications significantly faster than others. If your case has been pending significantly longer than the published processing time for your field office, you may submit a case inquiry through myUSCIS or contact the USCIS Contact Center.
5. Benefits of U.S. Citizenship
- U.S. passport: Travel internationally without U.S. visa restrictions and access U.S. consular assistance abroad
- Right to vote: Participate in federal, state, and local elections
- No risk of deportation: U.S. citizens cannot be deported (absent fraud in obtaining citizenship)
- Expanded family petitioning: Citizens can sponsor parents, siblings, and adult children — categories not available to green card holders
- Federal employment: Access to federal jobs requiring U.S. citizenship
- Public benefits: Access to additional federal benefits not available to green card holders
- No renewal requirement: U.S. citizenship does not expire; no need to renew like a green card. (Permanent residents who are not yet naturalizing should see renewing a Green Card before naturalization.)
Frequently Asked Questions About Form N-400 and Naturalization
How long do I have to wait to apply for U.S. citizenship?
Most green card holders must wait 5 years of continuous lawful permanent residence before applying for naturalization. Spouses of U.S. citizens who received their green card through the marriage can apply after 3 years. You can file your N-400 up to 90 days before either the 3-year or 5-year anniversary.
Can I lose my green card while my N-400 is pending?
No. Filing N-400 does not put your permanent resident status at risk. If your application is denied, you remain a permanent resident. However, if USCIS discovers conduct during the N-400 process that makes you deportable or inadmissible (such as previously undisclosed criminal history), they may place you in removal proceedings. This is why honest and complete disclosure on the N-400 is essential.
Do I have to give up my original citizenship to become a U.S. citizen?
U.S. law does not require you to renounce your original citizenship to become a U.S. citizen — you take an oath that includes language about renouncing allegiance to other nations, but in practice the U.S. government does not enforce the loss of your original citizenship. Whether your original country allows dual citizenship is a matter of that country’s law. Many countries do allow their citizens to hold U.S. citizenship simultaneously (dual nationality). Check your original country’s laws on dual citizenship before naturalizing if this is a concern.
Latest Updates & Related Guides
Related Immigration Process Guides
- How to Get a U.S. Green Card: All Pathways Explained
- Form I-485: Adjustment of Status Complete Guide
- Consular Processing: NVC and Immigrant Visa Interview
- Form I-864 Affidavit of Support: Sponsor Requirements
- Visa Bulletin & Priority Dates Guide
- Marriage-Based Green Card Guide 2025
- Work Permit (EAD): Form I-765 Guide
- EB-1A & EB-2 NIW: Self-Petition Green Card Guide
6. The N-400 Civics Test: What You Need to Know
Every naturalization applicant must pass an English and civics test at their N-400 interview. The civics test consists of 100 official questions about US history and government. During the interview, the USCIS officer asks up to 10 questions — you must answer at least 6 correctly to pass.
| Test Component | Format | Pass Requirement | Exemptions |
|---|---|---|---|
| Civics | Oral — officer asks up to 10 of the 100 official questions | Answer 6 out of 10 correctly | Applicants 65+ who have been LPR for 20+ years take a shorter 20-question version; answer 6 of 10 |
| English Reading | Read one sentence aloud in English | Pass after 3 attempts | Exempt: age 50 + 20 yrs LPR (50/20); age 55 + 15 yrs LPR (55/15); medical disability |
| English Writing | Write one sentence in English as dictated by officer | Pass after 3 attempts | Same exemptions as reading above |
| English Speaking | Assessed throughout the interview | Ability to communicate basic information | Medical disability exemption (Form N-648) |
The complete list of 100 civics questions is available at uscis.gov/citizenship/find-study-materials-and-resources. USCIS provides free study materials including flashcards, practice tests, and the official Civics Practice Test app. Study tip: Focus on the questions about the Constitution, the branches of government, and the Bill of Rights — these appear most frequently. The 65+/20-year version uses a subset of 20 questions marked with an asterisk in the official study guide.
7. N-400 Interview: Common Questions and What to Expect
The N-400 interview is typically 20–45 minutes. The officer will review your application, ask you to swear an oath, test your English, administer the civics test, and ask background questions. Knowing what to expect reduces anxiety and helps you prepare accurate answers.
| Question Category | Example Questions | Why They Ask |
|---|---|---|
| Identity / Residence | “How long have you lived at your current address?” / “List all the places you have lived in the past 5 years” | Verify continuous residence |
| Travel | “Have you been outside the US in the past 5 years?” / “Were any trips longer than 6 months?” | Check continuous residence and physical presence |
| Employment | “Where have you worked in the last 5 years?” / “Are you currently employed?” | Verify ties and stability |
| Good Moral Character | “Have you ever been arrested?” / “Have you ever failed to file a tax return?” | Statutory requirement — covers last 5 years (3 if married to USC) |
| Oath / Allegiance | “Are you willing to bear arms for the US?” / “Do you support the Constitution?” | Required for naturalization oath |
| Marital Status | “Are you still married to the same person listed on your application?” / “Have you been married before?” | Verify application accuracy and bigamy check |
If you fail the civics or English test at your first interview, USCIS will schedule a second interview 60–90 days later. You only need to retake the portion you failed. If you fail the second interview, your N-400 will be denied — but you can reapply.
8. Special Naturalization Paths — Not Everyone Waits 5 Years
The standard 5-year LPR requirement is not the only path to citizenship. Several categories allow accelerated or alternative naturalization:
| Category | Requirement | Wait Period | Special Rules |
|---|---|---|---|
| Married to US citizen | 3 years as LPR while living with USC spouse | 3 years | Must remain married to same USC throughout the process |
| US military service | 1 year of honorable service during peacetime | 1 year active service | No LPR requirement during certain periods; can apply from abroad |
| Wartime military service | Any period of honorable service during designated conflict | Immediate eligibility | No continuous residence or physical presence requirement |
| Child of USC parent | LPR under 18 living with USC parent | Automatic under INA 320 | Citizenship acquired automatically; may need N-600 certificate |
| Battery/abuse survivor (VAWA) | 3 years as LPR; abusive relationship with USC | 3 years | Does not require living with USC spouse at time of filing |
| Surviving spouse of military member | LPR at time of spouse’s death in active service | No waiting period | File N-400 at any time after spouse’s death |
9. What Happens After the Interview — The Oath Ceremony
If your N-400 is approved at the interview (or in a separate decision letter), you will be scheduled for an Oath of Allegiance ceremony. This is the final step — you are not a US citizen until you take the oath.
Ceremonies can be administrative (same day as the interview, conducted by the USCIS officer) or judicial (scheduled separately in a federal or state court). Administrative ceremonies are more common and faster. At the ceremony, you will: surrender your green card, take the Oath of Allegiance, and receive your Certificate of Naturalization (Form N-550) — your proof of US citizenship.
After the oath: Apply for a US passport immediately (use your Certificate of Naturalization as proof of citizenship). You can also register to vote, petition for family members as a US citizen (faster than as an LPR), and access all rights of citizenship including holding federal jobs requiring US citizenship.
