How to Apply for U.S. Citizenship: 2026 N-400 Guide

This guide explains how to apply for U.S. citizenship through naturalization, covering eligibility requirements, the N-400 application process, the civics and English tests, and what to expect from filing through the oath ceremony. Each year, roughly 800,000 to 900,000 people complete the naturalization process and become U.S. citizens. If you hold a green card and meet the residence requirements, you may be closer to eligibility than you think.

Table of Contents

• Who Is Eligible to Apply for U.S. Citizenship?
• Continuous Residence and Physical Presence Requirements
• How to Apply for U.S. Citizenship: Step by Step
• Form N-400: What You Need to Know
• The Citizenship Test and Interview
• Citizenship Application Timeline and Fees in 2026
• Common Mistakes That Delay or Deny Citizenship Applications
• Key 2025-2026 Policy Changes Affecting Naturalization
• How Vega & Associates Can Help
• Frequently Asked Questions About Applying for U.S. Citizenship

Who Is Eligible to Apply for U.S. Citizenship?

USCIS granted naturalization to approximately 878,000 people in fiscal year 2023, according to agency data. To qualify, you must meet several baseline requirements before you file Form N-400. Meeting all of them before you submit is essential — applying too early is one of the most common reasons applications get delayed or denied.

The core eligibility requirements are:

• Be at least 18 years old at the time of filing
• Be a lawful permanent resident (green card holder)
• Meet the continuous residence and physical presence requirements for your category
• Demonstrate good moral character during the required period
• Pass the English and civics tests (or qualify for an exemption)
• Be willing to take the Oath of Allegiance to the United States

The 5-Year Rule

Most green card holders must wait five years from the date they became a lawful permanent resident before filing. During those five years, you must have been physically present in the United States for at least 30 months. This is the standard path for the majority of naturalization applicants.

The 3-Year Rule

If you are the spouse of a U.S. citizen, you may qualify after just three years as a permanent resident. You must have been physically present in the U.S. for at least 18 months during that period and must have been living with your U.S. citizen spouse throughout. This shorter timeline ends if the marriage ends before you naturalize.

Military Exception

Active-duty military members and honorably discharged veterans often qualify for a shortened or waived waiting period. Service members who served honorably during a designated period of hostility may apply for naturalization without first obtaining a green card, and the continuous residence requirement may be reduced or eliminated entirely depending on the length and nature of service.

Children of U.S. Citizens

Some children acquire U.S. citizenship automatically under the Child Citizenship Act of 2000. If you are a lawful permanent resident under 18 and at least one parent is a U.S. citizen, you may already be a citizen without filing anything. An immigration attorney can confirm your status. In many cases, no N-400 is needed — only a U.S. passport application or a Certificate of Citizenship request.

Continuous Residence and Physical Presence Requirements

Continuous residence and physical presence are two different legal standards, and confusing them is a common mistake. Continuous residence means you have maintained your permanent home in the United States for the required period. Physical presence means the actual number of days you were physically inside the country during that time.

Extended time outside the United States can put your application at risk. Any single trip abroad that lasts more than six months raises a flag with USCIS about whether you abandoned your continuous residence. A trip of one year or more creates a legal presumption that you broke your continuous residence, which can restart the clock on your eligibility date.

If your job or military service requires extended time overseas, Form N-470 (Application to Preserve Residence for Naturalization Purposes) may allow you to protect your continuous residence. This applies to certain U.S. government employees, contractors, and others working abroad on qualifying assignments.

You must also live within the USCIS field office jurisdiction where you plan to file for at least three months before submitting your N-400. This is separate from the five- or three-year requirement. Finally, track every international trip you have taken during the required period — dates of departure and return, countries visited, and purpose of travel. USCIS asks about all of it on Form N-400.

How to Apply for U.S. Citizenship: Step by Step

The naturalization process follows a defined sequence. Skipping steps or filing out of order causes delays. Here is the full process from start to finish:

1. Confirm your eligibility. Verify that you meet the 5-year or 3-year rule, continuous residence requirement, physical presence requirement, and good moral character standard before doing anything else.
2. Gather your required documents. At minimum, you will need copies of your green card (front and back), passport, travel history for the past five years, federal tax returns for the past five years, and any marriage, divorce, or court records that apply to your situation.
3. Complete Form N-400. This is the Application for Naturalization. It has 18 parts and asks about your entire background, including addresses, employers, family members, travel, and criminal history. Answer every question honestly and completely.
4. Pay the filing fee. The current fee for Form N-400 is $760, plus $85 for biometrics, for a total of $845. Low-income applicants may qualify for a fee waiver using Form I-912. Military applicants filing under INA 328 or 329 pay no fee.
5. Submit your N-400 online at USCIS.gov or by mail. Online filing is faster and gives you instant confirmation with a receipt number. You can file up to 90 days before you meet the continuous residence requirement — this is called the early filing window, and it does not affect your eligibility date.
6. Receive your receipt notice (Form I-797). Keep this document. It contains your case number, which you will use to check your case status on the USCIS website.
7. Attend your biometrics appointment. USCIS will schedule this at a local Application Support Center. You will provide fingerprints, a photograph, and a signature. Missing this appointment without rescheduling will delay your case significantly.
8. Receive your interview notice. In 2026, most applicants wait 8 to 14 months from filing before receiving an interview date. Processing times vary by field office. Check current estimates at USCIS.gov.
9. Attend your citizenship interview and take the civics and English tests. A USCIS officer will review your N-400 with you, ask questions about your background, and administer the tests. Bring all original documents and any updates to your application.
10. Receive USCIS’s decision. The officer may approve your application on the spot, issue a continuance requesting additional documents or a second interview, or deny the application. Most approvals happen at the interview.
11. Take the Oath of Allegiance. After approval, you attend a naturalization ceremony and take the oath. In some field offices, the ceremony happens on the same day as your interview. In others, you receive a separate ceremony date within days or weeks.
12. Apply for your U.S. passport. Bring your Certificate of Naturalization to a passport acceptance facility as soon as possible after the ceremony. Your passport is proof of citizenship and opens international travel as a U.S. citizen.

Form N-400: What You Need to Know

Form N-400 is the only USCIS form used to apply for naturalization as an adult. It has 18 sections and covers your personal history in significant detail. USCIS uses the information you provide to verify your eligibility and good moral character, and officers will review the form closely at your interview.

The form covers your addresses for the past five years, all employers during that period, every international trip you have taken, your marital history, your children, your affiliations with organizations, and your complete criminal history. Arrests, charges, and convictions must all be disclosed — even arrests that were dropped or expunged. Omitting anything that USCIS can find in a background check is treated as a false statement, which can result in denial and, in serious cases, deportation proceedings.

Online filing through your USCIS online account is strongly recommended over paper filing. You receive instant confirmation that USCIS received your application, can track case status online, and receive electronic notices. Paper applications sent by mail take longer to process and can be lost or rejected for minor errors more easily.

The 90-day early filing rule: You are allowed to submit your N-400 up to 90 days before you reach the five-year (or three-year) continuous residence mark. USCIS will not reject the application for early filing as long as you meet the requirement by the time of your interview. This lets you start the clock on processing time without waiting until the exact anniversary date.

The Citizenship Test and Interview

The naturalization interview combines a review of your N-400 application with the civics and English tests. Many applicants feel anxious about this step, but preparation makes a measurable difference. The officer is not trying to trick you — they want to confirm what is already in your file and verify that you meet the test requirements.

Civics Test

As of October 20, 2025, USCIS uses an expanded bank of 128 official civics questions covering U.S. history, government structure, rights and responsibilities, and U.S. geography. The officer will ask you up to 20 of those questions during your interview. You must answer at least 12 correctly to pass. If you filed your N-400 before October 20, 2025, you take the prior 100-question version (10 asked, 6 to pass).

All 128 questions and their official answers are published on USCIS.gov. USCIS also provides flashcards, a study guide, and practice tests at no cost. Study the official materials — the answers are specific, and paraphrasing does not always receive credit.

If you are 65 years of age or older and have been a lawful permanent resident for at least 20 years, you qualify for the 65/20 exemption. Under the 2025 test, you take a shorter version — the officer asks you 10 questions from the 20, and you must answer at least 6 correctly. You may also take the test in your native language under this exemption.

English Test

The English test has three components: reading, writing, and speaking. For reading, the officer asks you to read one sentence aloud correctly — you get up to three attempts with different sentences. For writing, the officer dictates a sentence and you write it down — again, three attempts. Speaking ability is evaluated throughout your entire interview, not in a separate section.

Two age-based exemptions apply to the English requirement:

• 50/20 rule: If you are 50 years of age or older and have been a lawful permanent resident for at least 20 years, you are exempt from the English test entirely. You may conduct the interview and take the civics test in your native language.
• 55/15 rule: If you are 55 years of age or older and have been a lawful permanent resident for at least 15 years, you are also exempt from the English test and may use an interpreter.

If you qualify for either exemption, bring documentation of your green card date to your interview so the officer can confirm your eligibility on the spot.

What If You Fail?

Failing the civics test, the English test, or both at your first interview does not end your naturalization process. USCIS will schedule a second interview within 60 to 90 days. At the second interview, you only need to retake the portions you failed — not the entire test.

If you fail the second time, USCIS will deny your N-400 application. You have two options at that point: refile a new N-400 and go through the process again, or file Form N-336 to request a hearing on the denial. Most applicants who fail twice benefit from more structured preparation before refiling. An immigration attorney can identify the specific gaps and help you prepare more effectively.

Citizenship Application Timeline and Fees in 2026

Processing times for naturalization applications have increased in recent years. In 2026, most applicants should expect 8 to 14 months from the date they file to the date of their oath ceremony, though individual field offices vary. The table below shows each stage and its estimated timeframe.

For current processing time estimates specific to your field office, visit the USCIS processing times page at uscis.gov/processing-times and select Form N-400.

Fees in 2026:

• Form N-400 filing fee: $760 (paper) or $710 (online)
• Biometrics fee: $85
• Total: $845 (paper) or $795 (online)
• Reduced fee option: $380 for qualifying lower-income applicants

Fee waivers are available for applicants who meet low-income criteria. File Form I-912 (Request for Fee Waiver) together with your N-400 application. You must submit documentation of your income or evidence that you receive a means-tested benefit. USCIS reviews fee waiver requests separately from the application itself.

Important: DHS proposed a significant fee increase on June 23, 2026 that would raise the paper filing fee to $1,330 and the online fee to $1,280 — approximately a 75-80% increase. The proposed rule would also eliminate fee waivers and the $380 reduced fee option entirely. The comment period is open now; the current fees remain in effect while the rulemaking process plays out. If you are eligible to apply, filing sooner rather than later locks in the current fees.

Common Mistakes That Delay or Deny Citizenship Applications

Most naturalization denials and delays are preventable. The issues below come up repeatedly, and each one is avoidable with proper preparation and honest disclosure.

• Filing before you meet the continuous residence requirement. The 90-day early filing window exists, but filing outside of it — even by a few days — can result in rejection or denial. Confirm your eligibility date before you file.
• Failing to disclose international trips. N-400 asks about every trip outside the United States during the past five years, including short weekend trips to Canada or Mexico. USCIS cross-references entry and exit records. Omissions look like intentional concealment.
• Not disclosing criminal history. Traffic tickets over a certain threshold, arrests, charges, and convictions must all be disclosed on the form, even if the case was dismissed, dropped, or expunged. The officer will have access to background check results. A surprise disclosure at the interview raises serious credibility issues.
• Missing the biometrics appointment without rescheduling. If you cannot attend your biometrics appointment, reschedule it through your USCIS online account before the appointment date. Missing it without notice freezes your application.
• Extended international travel while the N-400 is pending. Travel during the pendency period does not automatically break your continuous residence, but a trip of more than six months after you file will raise questions. If you must travel for an extended period, consult an attorney before leaving.
• Failing to maintain good moral character during the pending period. The good moral character requirement continues from the beginning of the required period all the way through the oath ceremony. New arrests, tax issues, or other conduct problems after filing can still affect your case.
• Submitting incomplete documents. Missing a required document — such as a marriage certificate, divorce decree, or court disposition — causes USCIS to issue a Request for Evidence (RFE), adding months to your wait time.

Key 2025-2026 Policy Changes Affecting Naturalization

USCIS has made several significant changes to the naturalization process in the past year. If you are applying in 2026, these updates directly affect your application.

New Civics Test (Effective October 20, 2025)

USCIS replaced the 100-question civics test with an expanded 128-question version. The new test asks 20 questions at the interview (up from 10), and you must answer at least 12 correctly (up from 6). Applicants who filed before October 20, 2025 take the old version. Everyone filing today takes the 2025 version. The full question list is free on USCIS.gov.

Expanded “Good Moral Character” Standard (August 2025)

A USCIS policy memo dated August 15, 2025 expanded how officers evaluate good moral character. Officers now review the “totality of circumstances” rather than a specific checklist. Conduct now subject to review includes multiple DUIs, repeated traffic violations, tax non-compliance, and other behavior deemed “inconsistent with civic responsibility.” USCIS also resumed neighborhood and workplace investigations — a practice that had been abandoned since the 1990s — starting August 26, 2025. If your background includes anything in this territory, consult an attorney before filing.

Adjudication Pause for Certain Countries (Partially Resolved)

USCIS placed processing holds on N-400 applications from nationals of 39 countries starting January 1, 2026. A federal court vacated this policy on June 5, 2026, and cases are now proceeding. If you are from one of the affected countries — including Afghanistan, Haiti, Iran, Nigeria, Syria, or Venezuela — your case may have experienced delays, and you may benefit from legal representation to monitor its progress.

How Vega & Associates Can Help

Naturalization looks straightforward on paper, but the details matter. A minor issue in your travel history, an undisclosed arrest from years ago, or a gap in your tax records can turn a routine approval into a denial. Adan G. Vega is Texas Board Certified in Immigration and Nationality Law, a designation held by fewer than 1% of Texas attorneys in this practice area. The firm reviews each client’s full immigration history before filing to identify any issues that need to be addressed before USCIS does.

Vega & Associates prepares the complete N-400 package, reviews supporting documents for accuracy and completeness, and walks clients through the civics interview process before the appointment. If your case involves criminal history, extended travel, or any gap in your immigration record, working with an experienced attorney can be the difference between approval and a denial that takes years to resolve.

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Frequently Asked Questions About Applying for U.S. Citizenship

How long does it take to become a U.S. citizen after getting a green card?

Most green card holders must wait five years from the date they received lawful permanent residence before filing Form N-400. Spouses of U.S. citizens may qualify after three years. Once you file, USCIS processing in 2026 takes an average of 8 to 14 months, so the total timeline from green card to oath can range from six to eight years or more depending on when you became a permanent resident. Check current processing times by field office at uscis.gov/processing-times.

What is the filing fee for Form N-400 in 2026?

The filing fee for Form N-400 is $760. Most applicants also pay an $85 biometrics fee, bringing the total to $845. These fees were updated in April 2024 and remain in effect in 2026. Applicants who meet low-income criteria can request a fee waiver by filing Form I-912 with their application. Active-duty military members filing under certain provisions pay no fee.

Can I apply for citizenship if I have a criminal record?

It depends on the nature and timing of the offense. Some criminal history makes an applicant permanently ineligible for naturalization. Other offenses may affect the good moral character finding for the required period but not bar naturalization permanently. You must disclose all arrests, charges, and convictions on Form N-400 regardless of the outcome. If you have any criminal history, consult an immigration attorney before filing — undisclosed criminal history discovered at the interview is treated as a false statement and can result in denial or removal proceedings.

What happens if I fail the citizenship test?

If you fail the civics test, the English test, or both at your first interview, USCIS will schedule a second interview within 60 to 90 days. At the second attempt, you only retake the portions you failed. If you fail the second time, USCIS denies your N-400 application. You can then refile a new application or appeal the denial by filing Form N-336 within 30 days of the decision. Most applicants benefit from structured preparation with an attorney or study group before the second attempt.

Do I need to give up my original citizenship to become a U.S. citizen?

The United States does not require you to renounce your original citizenship as a condition of naturalization. You take an oath that includes renouncing allegiance to foreign states, but this is a legal declaration for U.S. purposes — it does not automatically strip you of citizenship in your home country. Many countries permit dual citizenship. Your home country’s laws govern whether you remain a citizen there after you naturalize in the United States. Consult your country’s consulate or an attorney in that country if you are uncertain.

Can I travel outside the U.S. while my N-400 is pending?

Yes, but with caution. Short trips while your application is pending generally do not affect your case. However, a single trip of six months or more during the pendency period can raise questions about your continuous residence, and a trip of one year or more may be treated as abandoning your permanent residence entirely. If you must travel for an extended period after filing, consult an immigration attorney before you leave. You are not barred from travel, but unplanned extended stays abroad can complicate or derail an otherwise strong application.

What documents do I need to apply for U.S. citizenship?

The core documents for most applicants include: a photocopy of both sides of your green card, copies of any other immigration documents (visas, travel documents), your passport and any prior passports used during the required period, federal tax transcripts or returns for the past five years, and a complete list of every trip outside the United States including dates and destinations. If you are applying under the three-year rule, you also need your marriage certificate and proof that you have lived with your U.S. citizen spouse. Court records for any arrest, charge, or conviction must be included regardless of outcome. USCIS may also request additional documents based on your specific history.