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About Form N-400, Application for Naturalization
The N-400 Application is just one of the many forms you may need for the immigration process. For information, guidance, and support, call the Do Law Office.
What Is Form N-400?
Form N-400, Application for Naturalization, is the document that legal permanent residents (Green Card holders) use to apply for U.S. citizenship.
It is filed with U.S. Citizenship and Immigration Services (USCIS), part of the Department of Homeland Security (DHS).
The application covers five main areas:
- Personal background – residency, family details, and basic identification
- Employment history – past and current work or schooling
- Moral character – criminal history or related conduct
- Commitment to the U.S. – support for the Constitution and democratic principles
- English proficiency – ability to read, write, speak, and understand English
Completing this form is a required step in the naturalization process, which concludes with the oath of allegiance at a naturalization ceremony.
Who Is Eligible for Form N-400?
Before you start the naturalization process, you need to make sure you qualify. USCIS sets out both standard requirements and special cases for certain applicants.
You are eligible for Form N-400 if:
- You are at least 18 years old
- You have been a lawful permanent resident (green card holder) for:
- 5 years, or
- 3 years if you are married to a U.S. citizen
- You can show good moral character
- You may also file up to 90 days early before meeting the residence requirement (use the USCIS Early Filing Calculator)
Special eligibility categories
Some applicants qualify under special provisions, such as U.S. military service or being the spouse of a U.S. citizen in qualifying employment abroad.
These cases have additional rules and documentation.
What Documents Do I Need with My N-400 Application?
The documents you must submit with Form N-400 depend on your situation. But in most cases, you may need:
Required Identification
- Green Card: A copy of the front and back of your permanent resident card
- Passport-style photos: Only required if you live outside the United States
Family and Marital Status
- Proof of marital status (if applicable): Marriage certificate, divorce decree, annulment, or death certificate
Special Circumstances
- Military service: Form N-426, Request for Certification of Military or Naval Service
- Medical disability exceptions: Form N-648, Medical Certification for Disability Exceptions
Supporting Records
- Foreign-language documents: A full English translation with translator certification
- Tax records: IRS tax transcripts or proof of arrangements if taxes are owed
- Court or police records (if applicable): Arrest reports, court dispositions, sentencing records, or probation documents if you’ve ever been arrested or convicted
- Continuous residence evidence: If you took trips longer than 6 months but less than a year, documents like rent/mortgage statements, pay stubs, or bank records
- Selective Service proof (if required): Status information letter if you failed to register
Depending on your eligibility category (such as being the spouse of a U.S. citizen, a military member, or a VAWA applicant), additional evidence may be required.
To avoid missing documents, consult with an experienced Atlanta family immigration lawyer to help you prepare a complete naturalization application.
How Much Does Form N-400 Cost?
As of July 22, 2025, USCIS requires the following filing fees for Form N-400:
- $710 if filed online through your USCIS account
- $760 if filed by mail (paper form)
- $380 reduced fee, available only if your household income is between 150%–400% of the Federal Poverty Guidelines and you file on paper.
- You must indicate eligibility in Part 10 of Form N-400 and provide supporting income documentation (USCIS reduced fee guidance).
- $0 with an approved fee waiver, also available only on paper.
- To qualify, you must submit Form I-912 with your application and show financial hardship.
Important Changes to N-400 Fees
The 2025 fee rule introduced several notable updates:
- The old $725 total (which included a separate $85 biometrics fee) is gone. Biometrics are still required in most cases, but the cost is now built into the filing fee.
- The age 75+ biometrics exemption no longer applies, since the fee is no longer separate.
- Payment methods remain the same: check, money order, or credit/debit card with Form G-1450 (for mail), or payment through your USCIS online account.
Note: Filing fees are non-refundable. USCIS will not return your payment even if your application is denied or withdrawn.
What Information Does Form N-400 Ask For?
Form N-400 is a comprehensive document designed to gather essential information about applicants aspiring to become U.S. citizens.
This form is divided into several parts, each focusing on different aspects of the applicant’s background, residency, and allegiance to the United States.
Below is a simplified overview, grouped by theme, with references to the official “Parts” in the form.
Identity & Eligibility (Parts 1–4)
This section covers your personal details and the basis for your naturalization. You’ll be asked about:
- Name, A-Number, and contact information
- Eligibility category (e.g., 5 years as a green card holder, 3 years if married to a U.S. citizen)
- Accommodations if you have a disability or impairment
- Biographic information, such as ethnicity and race
Life in the U.S. (Parts 5–8)
USCIS uses this section to confirm your residence and physical presence. You’ll provide:
- Addresses for the past five years
- Employment and education history
- Travel history outside the U.S., especially trips over six months
Family Information (Parts 9–10)
Here you’ll give details about your family life, including:
- Marital history (current and past marriages)
- Children’s information, which may affect their eligibility for benefits through your application
Moral Character & Oath (Parts 11–18)
This is one of the most important sections. It asks about your character, loyalty, and readiness to become a U.S. citizen, including:
- Criminal history or prior immigration violations
- Tax obligations and selective service registration (if applicable)
- Commitment to the Oath of Allegiance
Small mistakes or omissions in these sections can lead to delays or even denials. If you’re unsure about how to answer, getting guidance from a naturalization attorney can help avoid costly errors.
How do I file Form N-400? (Mail vs. Online)
You can file your Form N-400, Application for Naturalization, either online or by mail. The best method depends on your situation:
Online filing:
- Create a USCIS online account
- Upload your supporting documents and pay the filing fee electronically
- Track your case status, receive notices, and respond to USCIS requests through your account
- ⚠️ Available only if you live in the United States
Mail filing:
- Download and print the N-400 form
- Mail your application to the correct USCIS lockbox address (varies by your state and delivery service)
- Must be used if:
- You live outside the U.S.
- You are requesting a fee waiver or reduced fee
- You cannot access or use the online system
Both methods are equally valid, but online filing is faster and allows you to track your case in real time.
When can I file Form N-400? (Early filing rules)
Most applicants can file Form N-400 after:
- 5 years as a lawful permanent resident, or
- 3 years if married to and living with a U.S. citizen.
You may apply up to 90 days early before reaching the 3- or 5-year mark. Use the USCIS early filing calculator to confirm your exact eligibility date.
What happens after I file Form N-400?
Once you file Form N-400, USCIS takes you through several steps:
- Receipt notice – USCIS will send you a formal notice confirming that they received your application.
- Biometrics appointment – You’ll be scheduled to provide fingerprints, a photo, and a signature so USCIS can run background checks.
- Interview and tests – At your local field office, you’ll be interviewed about your application and take the English and civics tests.
- Oath ceremony – If approved, USCIS will invite you to take the Oath of Allegiance. You only become a U.S. citizen once you complete this final step.
How long does the process take?
The full naturalization process usually takes 6 to 24 months from the time you file Form N-400 until you take the Oath of Allegiance.
The wide range reflects how busy your local USCIS field office is. Some offices complete the whole process in under a year, while larger city field offices often have longer backlogs, stretching the timeline closer to two years.
Here’s what that looks like in practice:
- First few weeks: You’ll get a receipt notice and biometrics appointment.
- 8–12 months in (typical): Most applicants are scheduled for their interview and citizenship tests within the first year.
- After the interview: If you pass, USCIS may approve your case on the spot or within a few weeks.
- Oath ceremony: Usually scheduled a few weeks later, though in some busy districts it can take months.
You can always check the average wait time for your field office on the USCIS processing times tool and track your own case with your receipt number.
Can I fast-track my N-400 application?
There is no premium processing option for Form N-400. However, in rare cases you can request USCIS to expedite your application.
USCIS generally grants expedited processing only if you can show:
- Severe financial loss to you or your company
- Emergencies or urgent humanitarian reasons
- Compelling U.S. government interests (such as military deployment)
- Clear USCIS error in handling your case
To make a request, you’ll need to contact the USCIS Contact Center with your receipt number and evidence supporting your expedite request.
Do I Need a Lawyer for Form N-400?
You are not required to hire an attorney to file Form N-400, but many applicants find the process less stressful and more successful with professional help.
An immigration lawyer can:
- Review your application for accuracy and completeness
- Spot missing documents or issues that could cause delays
- Prepare you for the interview and civics test
- Guide you through complications such as prior immigration violations or criminal history
At Do Law Office, we help clients avoid costly mistakes and move through the naturalization process with confidence and peace of mind.
Contact us today to get started on your citizenship journey.
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