Form N-400- Everything you need to know-| North Loop Official Blog
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22 Nov 2020

Form N-400- Everything you need to know-

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The United States sees a staggering amount of immigrants filing for naturalization every year, however, the process may slightly differ depending on an individual’s eligibility.
This can often become quite confusing for some and this article uncovers everything you need to know about the Form-N-400.

What is Form N-400?

One of the most commonly asked questions we’ve come across is “what is Form N-400?”. In simple terms, the Form N-400 is an official application for naturalization form that green card holder’s file. Taking an individual’s eligibility and several other criteria, the US government proceeds to grant citizenship to an individual post filing the Form N-400.

N-400 Eligibility Criteria-

The N-400 form can be filed only by either green card holders who have had a green card for five years (or three years if you're married to a U.S. citizen) or by applicable armed forced criteria.

The comprehensive Naturalization Eligibility Worksheet can be found here.

Documents required to file Form N-400-

Individuals applying for naturalization need to submit the following documents-

  • A photocopy of both sides of the applicant’s Green Card

  • A check or money order for the application fee and the biometric services fee (Applicants 75 years of age or older are exempted from the biometrics services fee). The fee can also be paid via credit card through the USCIS portal itself.

  • For applicants residing outside the United States, 2 identical color photographs.


Applicants may be required to submit photocopies of a few documents that vary depending on their case. All information pertaining to the said documents can be found on the Document Checklist here.

Where to file Form N-400?

The form N-400 can be done via two modes- online by creating an account with the USCIS here and offline (via mail).Individuals applying for naturalization via the offline mode can refer to this link- which contains the N-400 filing addresses to which the application can be sent (along with the necessary documents). The N-400 filing addresses again vary depending on which state the applicant resides in.

N-400 Filing Fee-

The N-400 filing fee is $725 (filing fee of $640 + biometric fee of $85 wherever applicable). Applicants who file the form online have an online payment option and applicants filing the form offline can pay the fee with a money order, personal check, cashier’s check.

The biometric fee is exempt for applicants above the age of 75 and military applicants can avail of a complete filing fee waiver.

N-400 processing time-

The N-400 processing time usually ranges between 10 months - 17 months and applicants can check their case status here.

N-400 process of becoming a US citizen-

1. Determine the eligibility to become a US citizen.

2. Prepare and complete the Naturalization application.

3. File the fully filled application with all required documents and pay the relevant fees.

4. Go ahead with the Biometrics appointment and complete the interview process with the USCIS.

5. Wait for the USCIS to make a decision and if accepted, take the Oath of Allegiance to the United States and complete the naturalization process.

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