N400 Step by Step

This article will guide you step by step from checking your eligibility to completing your N400 application for Naturalization. These steps should be followed as a guidelines and NOT as specific requirements for any given case. Every case may be unique and should follow some or all steps according to your case. This process may take many months or even over a year to complete from the initial filing until becoming naturalized (US Citizen) but it is important to know what steps will be required.

Check if you are eligible to apply for US Citizenship/Naturalization.


Download and save the latest version N-400 Form (Application for Naturalization). Alternatively, create an online account with USCIS and apply on the web.

Fill the application, check and recheck for errors and sign your name at the end.

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Collect the required documents that goes with your N-400 form using following document checklist:


Determine your filing location based on where you live. Mail your application with USPS or UPS.

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