Application for Naturalization Form N-400

Who May File N-400?

Before you apply for naturalization, you must meet a few requirements. Depending on your situation, there are different requirements that may apply to you. However, generally, an applicant for naturalization must:

• Be 18 years old or older at the time of filing Form N-400, Application for Naturalization.
• Be a lawful permanent resident (have a “green card”).
• Demonstrate continuous permanent residence in the United States for at least 5 years 🔎(In some cases, this may be 3 years if you are married to a U.S. citizen 🔎)
• Show that you have been physically present in the United States for 30 months. (In some cases, this may be 18 months if you are married to a U.S. citizen.)
• Show that you have lived for at least 3 months in the state or USCIS district where you claim residence.

HOW to FILL THE FORM N-400?

You can fill out the form on a computer, typewriter or by hand. If you are filing it out by hand, you must write neatly in black ink. It is very important answer all of the questions. If a question does not apply, type or write “NA” in the appropriate space. Attach separate pieces of paper to the form if you need more room to answer any questions. Include your name and Alien Registration Number (if applicable) at the top of each one, and specify which question you are answering by including the number before the answer. Be sure to sign the form in the space provided. USCIS automatically rejects any forms that are incomplete and/or unsigned. You must submit the required fees and all supporting documents to USCIS along with the application. 

See detailed instructions 🔎

DOCUMENT CHECKLIST

All applicants must send the following 3 items with their N-400 application:

form N-400 filing instructions

Filing Fee: $640. (Add the $85 biometric fee for a total of $725, where applicable. See exceptions below.) You may pay the fee with a money order, personal check, or cashier’s check.

Exceptions:

• Applicants 75 years of age or older do not need to pay a biometric fee. They only need to pay the $640 filing fee.
• No fee is required for military applicants filing under section 328 or 329 of the INA.

Where To File?

1. All Domestic applicants Filing your Form N-400 by mail: depending on their residence in the U.S. For detail mailing instrucrions please visit our Direct filing addresses for form N-400 page.

2. If you are applying based on being a current or former member of the military, a spouse of a current member of the military, or a close relative of a deceased member of the military: 

For U.S. Postal Service (USPS):

USCIS
P.O. Box 4446
Chicago, IL 60680-4446

For FedEx, UPS, or DHL deliveries:

USCIS
Attn: Military N-400
131 S. Dearborn, 3rd Floor
Chicago, IL 60603-5517

Otherwise, you must create an online account in order to file your Form N-400 online with USCIS.